CN217933437U

CN217933437U - Ignition coil bush, seal structure, engine and vehicle

Info

Publication number: CN217933437U
Application number: CN202221456553.4U
Authority: CN
Inventors: 李松松; 陆健; 祁同晖; 王兰; 王晶
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-11-29
Anticipated expiration: 2032-06-10

Abstract

The utility model relates to the technical field of ignition coil sealing, in particular to an ignition coil bushing, which comprises an upper sleeve body, an adjusting sleeve body and a lower sleeve body which are fixedly connected in sequence, wherein the upper sleeve body, the adjusting sleeve body and the lower sleeve body are coaxially arranged; the end of the adjusting sleeve body connected with the upper sleeve body can be radially offset relative to the end of the adjusting sleeve body connected with the lower sleeve body. According to the utility model discloses an ignition coil bush, the adjusting sleeve body is in the same place the upper cover body and lower cover body coupling, the adjusting sleeve body self possesses elasticity, when producing the displacement deviation between the upper cover body and the lower cover body, the adjusting sleeve body plays the effect of compensation displacement deviation in the middle of the upper cover body and the lower cover body, can solve the problem that the oil blanket department of ignition coil bush and cylinder hood in the prior art can produce the gap like this, because ignition coil bush itself just can compensate the displacement deviation, so can not transmit the deviation for the cylinder hood, the big problem of position degree deviation between the oil blanket department of cylinder hood and the ignition coil bush has been solved.

Description

Ignition coil bush, seal structure, engine and vehicle

Technical Field

The utility model relates to an ignition coil seals technical field, especially relates to an ignition coil bush, seal structure, engine and vehicle.

Background

In the prior art, the ignition coil bushing of the gas engine is installed on the cylinder cover, so that engine oil in the cylinder cover is prevented from entering the inside of the ignition coil bushing to pollute the spark plug, and meanwhile, the engine oil is prevented from leaking to the outside of the cylinder cover.

However, because the position degree deviation inevitably exists between the bush mounting hole of the cylinder cover and the ignition coil bush, and the height of the ignition coil bush amplifies and transmits the deviation, the position degree deviation between the oil seal of the cylinder cover and the ignition coil bush is larger, the central axis of the oil seal and the central axis of the bush deviate greatly, the compensation capability of the oil seal is easily exceeded, even a gap occurs, the sealing failure is caused, and the oil leakage fault occurs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of the big sealing failure that leads to of position degree deviation between the oil blanket department of cylinder hood and the ignition coil bush at least. The purpose is realized by the following technical scheme:

the utility model provides an ignition coil bushing in a first aspect, which is characterized by comprising an upper sleeve body, an adjusting sleeve body and a lower sleeve body which are fixedly connected in sequence;

the end of the adjusting sleeve body connected with the upper sleeve body can be radially deviated relative to the end of the adjusting sleeve body connected with the lower sleeve body.

According to the utility model discloses an ignition coil bush, the adjusting sleeve body with the upper cover body with the lower cover body link together, the adjusting sleeve body self possesses elasticity, when producing the displacement deviation between the upper cover body and the lower cover body, the adjusting sleeve body plays the effect of compensation displacement deviation in the middle of the upper cover body and the lower cover body, can solve the problem that the oil blanket department of ignition coil bush and cylinder hood in the prior art can produce the gap like this, the utility model discloses an ignition coil bush itself just can compensate the displacement deviation, so can not transmit the deviation for the cylinder hood, consequently solved the big problem of position degree deviation between the oil blanket department of cylinder hood and the ignition coil bush, improve sealed effect, reduced the emergence of oil leak trouble.

In addition, according to the utility model discloses an ignition coil bush still can have following additional technical characterstic:

in some embodiments of the present invention, the adjusting sleeve is a rubber cylinder.

In some embodiments of the present invention, the two ends of the rubber cylinder are respectively connected to the upper sleeve body and the lower sleeve body by vulcanization.

The utility model discloses a second aspect provides a seal structure, including foretell ignition coil bush, the lower cover body is installed on the cylinder head, the upper cover body is installed on the cylinder head.

According to the utility model discloses a seal structure, the lower cover body is installed on the cylinder head, and the upper cover body is installed on the cylinder hood, and the inevitable displacement deviation that can produce between cylinder head and the cylinder hood, the adjusting collar between the upper cover body and the lower cover body can compensate the displacement deviation that produces between cylinder head and the cylinder hood, and consequently the gap just can not appear in the oil blanket department on the upper cover body and the cylinder hood, has improved sealing capacity.

The utility model discloses an in some embodiments, the mounting hole has been seted up on the cylinder cover, follows the circumference of mounting hole, the cylinder cover orientation one side at cylinder head place is extended and is had the boss structure, the upper cover body wears to establish in the boss structure and with the sealed cooperation of boss structure.

In some embodiments of the present invention, a sealing ring groove is formed in the inner side of the boss structure, a sealing ring is disposed in the sealing ring groove, and the sealing ring abuts against the upper sleeve body.

In some embodiments of the present invention, the boss structure is close to one end of the cylinder head, and a chamfer is provided on one side of the upper sleeve body.

In some embodiments of the utility model, the sealing structure further comprises a pressing plate, a limit hole is formed in the middle of the pressing plate, and the lower sleeve body is arranged in the limit hole and fixedly connected with the pressing plate.

The third aspect of the utility model provides an engine, including above-mentioned seal structure.

A fourth aspect of the present invention provides a vehicle, including the above-described engine.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated with like reference numerals throughout the drawings. In the drawings:

figure 1 schematically shows a perspective view of a bushing according to an embodiment of the invention;

figure 2 schematically shows a cross-sectional view of a bushing according to an embodiment of the invention;

fig. 3 schematically shows a cross-sectional view of an ignition coil sealing structure according to an embodiment of the present invention;

fig. 4 schematically shows an upper end partial schematic view of an ignition coil seal structure according to an embodiment of the present invention;

fig. 5 schematically shows a lower end partial schematic view of an ignition coil seal structure according to an embodiment of the present invention.

The reference numbers are as follows:

the cylinder cover is 10, the mounting hole is 11, the boss structure is 12, the chamfer angle is 121, and the sealing ring groove is 13;

20 is a cylinder cover, 21 is a matching hole, and 22 is a sealing groove;

30 is a bush, 31 is an adjusting sleeve body, 32 is an upper sleeve body, 33 is a lower sleeve body, 34 is a pressing plate, 341 is a fixing hole, and 342 is a limiting hole;

40 is a sealing ring;

50 is a sealing rubber ring;

and 60 is a fixing screw.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "in 8230 \8230; below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to fig. 2, according to the embodiment of the present invention, an ignition coil bushing 30 is provided, in which the ignition coil bushing 30 includes an upper sleeve body 32, a tuning sleeve body 31 and a lower sleeve body 33 which are fixedly connected in sequence. The end of the adjusting sleeve body 31 connected to the upper sleeve body 32 can be radially offset from the end of the adjusting sleeve body 31 connected to the lower sleeve body 33, it should be understood that the radial direction in this embodiment does not limit the cross section of the adjusting sleeve body 31 to be circular, and the adjusting sleeve body 31 can be in any shape, and only needs to be matched with the upper sleeve body 32 and the lower sleeve body 33. The adjusting sleeve body 31 has elasticity, so when the upper sleeve body 32 and the lower sleeve body 33 generate displacement deviation, the adjusting sleeve body 31 can compensate the displacement deviation, and the oil seal position of the upper sleeve body 32 and the cylinder cover 10 can not generate deviation.

It should be understood that the adjusting sleeve 31 is a rubber cylinder, and the rubber cylinder has the characteristics of non-stick property, difficult breaking, high elasticity, heat resistance, tensile strength and insolubility in organic solvents, so that the adjusting sleeve 31 is a rubber cylinder which has the advantages of elasticity, heat resistance, tensile strength and insolubility in organic solvents.

It should also be understood that the two ends of the rubber cylinder are respectively connected with the upper sheath body 32 and the lower sheath body 33 by vulcanization, and the rubber cylinder can be more firmly fixed on the upper sheath body 32 and the lower sheath body 33 by vulcanization, and the sealing performance is better.

In addition, as shown in fig. 3 to 5, the present invention further provides a sealing structure, which includes the ignition coil bushing 30, wherein the lower case 33 is mounted on the cylinder head 20, and the upper case 32 is mounted on the cylinder head 10. Displacement deviation is inevitably generated between the cylinder cover 20 and the cylinder cover 10, and the adjusting sleeve body 31 between the upper sleeve body 32 and the lower sleeve body 33 compensates the displacement deviation generated between the cylinder cover 20 and the cylinder cover 10, so that no gap is generated at the oil seal position of the upper sleeve body 32 and the cylinder cover 10, and the sealing capability is improved.

Specifically, a mounting hole 11 is formed in the cylinder cover 10, the cylinder cover 10 extends along the circumferential direction of the mounting hole 11 and towards one side where the cylinder head 20 is located to form a boss structure 12, and the upper sleeve body 32 is arranged in the boss structure 12 in a penetrating manner and is in sealing fit with the boss structure 12. Therefore, the sealing performance between the ignition coil bushing 30 and the cylinder cover 10 can be better ensured, the engine oil in the cylinder cover 10 is prevented from entering the ignition coil bushing 30 to pollute the spark plug, and the engine oil can be prevented from leaking to the outside. The arrangement of the boss structure 12 also solves the problem of fixing the upper sleeve body 32, and prevents the upper sleeve body 32 from loosening to generate an eccentric gap.

It should be understood that the boss structure 12 may be provided with a sealing ring groove 13 inside, and a sealing ring 40 is engaged with the sealing ring 40, and the sealing ring 40 abuts against the upper sleeve body 32, so that the sealing performance between the upper sleeve body 32 and the cylinder head 20 is improved. The seal ring 40 may be made of rubber. The sealing ring groove 13 is matched with the sealing ring 40, so that the sealing effect can be better enhanced, the wear resistance between the upper sleeve body 32 and the boss structure 12 can be enhanced, and the service life of the ignition coil bushing 30 is prolonged.

It should be further understood that the sealing ring 40 abuts against the ignition coil bushing 30, and the diameter of the sealing ring 40 is larger than the depth of the sealing ring groove 13 and the sealing ring 40 leaves a gap between the sealing ring grooves 13, so as to ensure that the filling rate of the sealing ring 40 filling the sealing ring groove 13 is lower than 100%. Because the sealing ring 40 is mostly made of rubber, if the filling rate is greater than or equal to 100%, the sealing ring 40 is easy to crack, and the sealing performance of the ignition coil sealing structure is reduced. The filling rate of the sealing ring 40 in the sealing ring groove 13 is lower than 100%, and the sealing ring 40 is not excessively extruded, so that the sealing ring is not fractured.

It is further understood that the inner side of the boss 12 close to the cylinder head 20 and facing the side of the upper jacket body 32 is provided with a chamfer 121. Because the upper cover body 32 is in sealing fit with the boss structure 12, it is very laborious to install, and the chamfer 121 is arranged on the edge of the inner side of the boss structure 12 close to the cylinder cover 20, so that the ignition coil bushing 30 can be conveniently installed. The chamfer 121 can play a role in installation guiding, installation convenience is further improved, and meanwhile, the chamfer is not limited by the structure of the cylinder cover 20, and applicability is improved.

It should be understood that, in order to cooperate with the installation, a pressing plate 34 is further disposed at a position where the lower sleeve body 33 contacts the cylinder head 20, a limiting hole 342 for allowing the lower sleeve body 33 to pass through is formed in the middle of the pressing plate 34, the lower sleeve body 33 passes through the limiting hole 342, the limiting hole 342 is used for limiting the height displacement of the lower sleeve body 33 to prevent the lower sleeve body 33 from falling off, and fixing holes 341 for fixing the lower sleeve body 33 on the cylinder head 20 are further disposed at two sides of the pressing plate 34. The pressure plate 34 may be fixed to the lower case 33 by welding, or may be integrally formed with the lower case 33 at the time of molding. The fixing screw 60 passes through the fixing hole 341 to fix the lower case 33 to the cylinder head 20.

Specifically, as shown in fig. 5, a fitting hole 21 is formed in the cylinder head 20, the fitting hole 21 is used for fitting the lower sleeve body 33 for installation, a sealing groove 22 is formed inside the fitting hole 21, and the sealing groove 22 can be sealed by fitting a sealing rubber ring 50. The sealing groove 22 is matched with the sealing rubber ring 50, so that the sealing effect between the lower sleeve body 33 and the cylinder cover 20 can be better strengthened, the wear resistance between the ignition coil bush 30 and the cylinder cover 20 can be strengthened, and the service life of the ignition coil bush 30 is prolonged. The function of the seal groove 22 and the seal rubber ring 50 is the same as the structure and function of the seal ring groove 13 and the seal ring 40, and therefore not described in more detail.

In addition, the utility model also provides an engine, including foretell seal structure, the seal structure in this embodiment has been constituteed to the ignition coil bush 30 that cylinder head 20 and cylinder hood 10 and centre on the engine set up. The problems that a gap is easy to generate between the ignition coil bushing 30 and the cylinder cover 10, sealing failure is caused, and oil leakage is generated are solved.

Additionally, the utility model also provides a vehicle, including foretell engine.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An ignition coil bushing is characterized by comprising an upper bushing body, an adjusting bushing body and a lower bushing body which are fixedly connected in sequence;

2. The ignition coil bushing according to claim 1, wherein the boot body is a rubber cylinder.

3. The ignition coil bushing according to claim 2, wherein both ends of said rubber cylinder are connected to said upper case and said lower case, respectively, by vulcanization.

4. A sealing structure comprising a cylinder head and a cylinder cover, characterized in that the sealing structure further comprises an ignition coil bushing according to any one of claims 1 to 3, the lower case being mounted on the cylinder head, and the upper case being mounted on the cylinder cover.

5. The sealing structure according to claim 4, wherein the cylinder cover is provided with a mounting hole, a boss structure extends along a circumferential direction of the mounting hole on a side of the cylinder cover facing the cylinder head, and the upper sleeve body is inserted into the boss structure and is in sealing engagement with the boss structure.

6. The sealing structure of claim 5, wherein a sealing ring groove is formed inside the boss structure, and a sealing ring is disposed in the sealing ring groove and abuts against the upper sleeve body.

7. The seal structure according to claim 5, wherein an end of the boss structure near the cylinder head, a side facing the upper case, is provided with a chamfer.

8. The sealing structure of claim 4, further comprising a pressing plate, wherein a limiting hole is formed in the middle of the pressing plate, and the lower sleeve body is arranged in the limiting hole and fixedly connected with the pressing plate.

9. An engine comprising a seal structure according to any one of claims 4 to 8.

10. A vehicle characterized by comprising the engine of claim 9.