CN212615130U

CN212615130U - Engine and press-in type spark plug spacer

Info

Publication number: CN212615130U
Application number: CN202021030114.8U
Authority: CN
Inventors: 杜文一; 张猛; 彭庆永; 许昌庆; 方飞; 张亚伟
Original assignee: Anhui Hualing Automobile Co Ltd
Current assignee: Anhui Hanma Engine Co.,Ltd.
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-26
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses an engine and a press-in type spark plug spacer, the press-in type spark plug spacer comprises a spark plug spacer body, a spacer flange fixedly connected with the periphery of the spark plug spacer body and a fastener which runs through the spacer flange and is used for connecting an engine cylinder cover; the spark plug spacer comprises a spark plug spacer body and is characterized in that a convex shoulder-shaped spacer bottom is arranged at the bottom of the spark plug spacer body, and a sealing surface used for being matched with a spark plug seat hole of an engine cylinder cover is arranged at the joint of the spacer bottom and the spark plug spacer body. The utility model provides a plug seat hole sealing connection of forced spark plug spacer and engine cylinder lid is reliable, avoids detonation pressure and high temperature to cause the spark plug spacer to be connected inefficacy with the engine cylinder lid, leads to the coolant liquid to leak and the engine damage.

Description

Engine and press-in type spark plug spacer

Technical Field

The utility model relates to the technical field of engines, in particular to forced spark plug spacer. The utility model discloses still relate to an engine that has above-mentioned forced spark plug spacer.

Background

At present, in order to improve power and torque, the theoretical detonation pressure of the design is higher and higher, so that the heat load of the engine is higher and higher, and if the sealing of a spark plug spacer on a cylinder cover fails, cooling liquid can enter a cylinder to damage the engine. The explosion pressure of the diesel engine refers to the pressure in the cylinder during the working cycle of the diesel engine, and the full length is measured by an explosion pressure meter.

A spark plug spacer: the cooling liquid in the nose bridge area of the sealed cylinder cover is used as an installation base of the spark plug and bears high-temperature fuel gas generated by combustion of the engine.

A cylinder cover: is mounted on the upper surface of the cylinder body, and the cylinder is sealed from the upper portion to form a combustion chamber. It is often in contact with high temperature and pressure combustion gases and is therefore subjected to significant thermal and mechanical loads.

At present, a stainless steel spark plug spacer is adopted on an engine, a thread at the bottom is screwed into a threaded hole in a cylinder cover, a copper gasket is compressed to realize sealing, and the heat load of the cylinder cover is transferred to a cooling system through a cylinder cover fire surface and the spark plug spacer. With the heavy engine for promoting power and moment of torsion, the theoretical detonation pressure of design is higher and higher, leads to the engine heat load also higher and higher, finally leads to the copper gasket of spark plug spacer on the cylinder head to become soft, and the bottom screw thread loses the packing force, and the sealed inefficacy of spark plug spacer leads to the coolant liquid to get into the cylinder, damages the engine.

Therefore, how to improve the reliability of the spark plug cup seal becomes a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a forced spark plug spacer, this forced spark plug spacer is sealed reliable with being connected of engine cylinder lid, avoids detonation pressure and high temperature to cause spark plug spacer and engine cylinder lid to be connected inefficacy, lead to the coolant liquid to leak and engine damage. Another object of the present invention is to provide an engine including the above-mentioned press-in type spark plug spacer.

In order to achieve the purpose, the utility model provides a press-in type spark plug spacer, which comprises a spark plug spacer body, a spacer flange fixedly connected to the periphery of the spark plug spacer body and a fastener which runs through the spacer flange and is used for connecting an engine cylinder cover; the spark plug spacer comprises a spark plug spacer body and is characterized in that a convex shoulder-shaped spacer bottom is arranged at the bottom of the spark plug spacer body, and a sealing surface used for being matched with a spark plug seat hole of an engine cylinder cover is arranged at the joint of the spacer bottom and the spark plug spacer body.

Optionally, the spacer flange is nested at the top of the spark plug spacer body and welded with the spark plug spacer body.

Optionally, a circular ring protrusion is arranged on the periphery of the spark plug spacer body, and a circular ring groove matched with the circular ring protrusion is arranged on the inner ring of the spacer flange.

Optionally, the fastener is specifically a stud, and the stud includes a first stud and a second stud symmetrically disposed on two sides of the spacer flange.

Optionally, the first stud is longer than the second stud, and both the first stud and the second stud penetrate through the spacer flange;

a positioning sleeve is sleeved on the lower section, which penetrates through the first stud and is positioned on the spacer sleeve flange;

the first stud is located the upper segment cover of spacer flange top is equipped with first cushion, the second stud is located the upper segment cover of spacer flange top is equipped with the second cushion.

Optionally, the lower end surface of the spacer flange is a chamfered surface, and the thickness of the spacer flange is gradually reduced from the center to two sides.

Optionally, a first sealing ring is sleeved on an upper section of the spark plug spacer body, which is located above the spacer flange; and a second sealing ring is sleeved on the lower section of the spark plug spacer body, which is positioned below the spacer flange.

The utility model also provides an engine, including engine cylinder lid and above-mentioned arbitrary one press-in spark plug cylinder lid engine cylinder lid seted up with spark plug spacer body complex spark plug seat hole, the week portion of spark plug seat hole seted up with fastener complex mounting hole one by one.

Optionally, the spacer bottom is an interference fit with the bottom of the spark plug socket hole.

Optionally, when the sealing surface is in fit sealing with a mating sealing surface of the engine cylinder head, a gap between the bottom of the spacer flange and the upper end surface of the engine cylinder head is greater than or equal to 1 mm.

Compared with the prior art, the utility model provides a forced spark plug spacer, including the spark plug spacer body, the spark plug spacer body passes through the press and impresses in the spark plug seat hole of engine cylinder lid, is connected the fastening through the fastener with the help of rigid coupling at the spacer flange of spark plug spacer body week portion and running through the spacer flange and engine cylinder lid. At the moment, the bottom of the convex shoulder-shaped spacer sleeve is inserted into the bottom of the spark plug seat hole, the bottom of the spacer sleeve is in interference fit with the spark plug seat hole, and a sealing surface at the joint of the bottom of the spacer sleeve and the spark plug spacer sleeve body is matched with a sealing matching surface at the bottom of the spark plug seat hole to seal the spark plug seat hole.

The sealing surface only plays a role in fitting and sealing, threads and gaskets are not arranged between the spark plug spacer body and the spark plug seat hole for connection and matching, and the situations of gasket deformation and thread failure caused by heating and explosion pressure can be avoided; but the engine cylinder cover is fixed by the spacer sleeve flange and the fastening piece, and the fastening piece and the spacer sleeve flange are arranged outside the spark plug seat hole, so that the impact of high-temperature and high-pressure fuel gas is avoided, and the sealing reliability and the connection stability are improved. The bottom of the spacer sleeve is arranged to be in interference press fitting with the bottom of the spark plug seat hole, so that the reliability of connection and sealing is further improved, the phenomenon that the engine is damaged due to the fact that cooling liquid enters the engine is avoided, and the spark plug is arranged in the spark plug spacer sleeve to seal and ignite the engine.

The utility model provides an engine includes above-mentioned forced spark plug spacer and engine cylinder lid, therefore possesses the same beneficial effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is an assembly view of a press-in type spark plug cup and an engine cylinder head provided in an embodiment of the present invention;

FIG. 2 is a partial enlarged view of portion A of FIG. 1;

FIG. 3 is a block diagram of the press-in type spark plug cup of FIG. 1;

fig. 4 is a partial longitudinal cross-sectional view of the press-in spark plug cup of fig. 3.

Wherein:

01-an engine cylinder cover, 1-a spark plug spacer body, 101-a spacer bottom, 102-a sealing surface, 103-a circular ring bulge, 2-a spacer flange, 201-a chamfer, 3-a positioning sleeve, 4-a first cushion block, 5-a fastening nut, 6-a first stud, 7-a second stud, 8-a second cushion block, 9-a first sealing ring and 10-a second sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 4, fig. 1 is an assembly view of a press-in type spark plug spacer and an engine cylinder head according to an embodiment of the present invention, fig. 2 is a partial enlarged view of a portion a of fig. 1, fig. 3 is a structural view of the press-in type spark plug spacer of fig. 1, and fig. 4 is a partial longitudinal sectional view of the press-in type spark plug spacer of fig. 3.

The utility model provides a press-in type spark plug spacer includes spark plug spacer body 1, spacer flange 2 and fastener. The spark plug spacer body 1 is used for being inserted into a spark plug seat hole of an engine cylinder head 01 to seal an engine, and meanwhile, the spark plug spacer can be inserted and screwed through a spark plug, so that the spark plug can ignite the engine. In order to realize the sealing of the spark plug seat hole, the bottom of the spark plug spacer body 1 is provided with a shoulder-shaped spacer bottom 101, the spacer bottom 101 is inserted into the bottom of the spark plug seat hole, and the sealing of the spark plug seat hole is realized by the matching of a sealing surface 102 at the joint of the spacer bottom 101 and the spark plug spacer body 1 and a matching sealing surface in the spark plug seat hole. In order to avoid connection failure between the spark plug spacer body 1 and a spark plug seat hole caused by high-temperature and high-pressure gas, a spacer flange 2 is fixedly connected to the outer periphery of a spark plug, a fastening piece penetrates through the spacer flange 2 to be connected with an engine cylinder cover 01, the fastening piece is connected with an engine and arranged outside the spark plug seat hole, impact of the high-temperature and high-pressure gas cannot be caused, and reliability of connection sealing between the spark plug spacer body 1 and the spark plug seat hole is guaranteed.

The diameter of the spacer bottom 101 can be flexibly set during processing, so that the spacer bottom 101 is in interference fit with the bottom of the spark plug seat hole, and the reliability of connection is further improved by means of the interference degree between the spacer bottom 101 and the spark plug seat hole by pressing the spark plug spacer body 1 in the spark plug seat hole.

The press-in type spark plug cup according to the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.

The utility model provides a structure of the spark plug spacer body 1 of the press-in type spark plug spacer is the same as the structure of conventional spark plug spacer on an average, including supplying spark plug cartridge and connect fixed well kenozooecium and with spark plug seat hole complex outer wall structure soon. The bottom of the spark plug spacer body 1 is a spacer bottom 101 which is arranged in a shoulder shape relative to the main body of the spark plug spacer body 1, and the diameter of the spacer bottom 101 is generally set to be slightly larger than that of a spark plug seat hole so as to facilitate the interference assembly of the spark plug spacer body and the spark plug seat hole. The joint of the spacer bottom 101 and the main body of the spark plug spacer body 1 is provided with a stepped sealing surface 102, the sealing surface 102 is arranged to be matched with a matching sealing surface arranged in a spark plug seat hole, when the spark plug spacer body 1 is pressed to the spark plug seat hole, the sealing surface 102 is in fit sealing with the matching sealing surface, and the spacer bottom 101 is embedded at the bottom of the spark plug seat hole.

In order to fix the spark plug spacer body 1 relative to the engine cylinder head 01, a spacer flange 2 is fixedly connected to the peripheral portion of the spark plug spacer body 1, and a fastener penetrates through the spacer flange 2 and is connected to the engine cylinder head 01, so that the spacer flange 2 fixes the spark plug spacer body 1 relative to the engine cylinder head 01. At this time, the fastening force between the spark plug spacer body 1 and the spark plug seat hole is provided by the fastening member and the engine head 01 and the spacer flange 2. Because the connection of the fastener and the engine cylinder cover 01 is not arranged in the spark plug seat hole, the connection between the fastener and the engine cylinder cover 01 is not directly impacted by high-temperature and high-pressure gas, the connection looseness caused by the impact of the high-temperature and high-pressure gas is avoided, and the connection and sealing reliability is ensured.

Because the fastener is connected with the engine cylinder cover 01 and the spacer flange 2, the fastening acting force of the fastener is firstly transmitted to the spacer flange 2, the spacer flange 2 is fixedly connected with the spark plug spacer body 1, and the fastening acting force is further transmitted to the spark plug spacer body 1, so that the reliability of connection and sealing between the spark plug spacer body 1 and a spark plug seat hole is ensured. The fastener can select single-end bolt or stud as required, and the fastener need cooperate fastening nut 5 to fasten when adopting the stud.

As shown in fig. 3 and 4, in an optional embodiment of the present invention, the spacer flange 2 is disposed on the top of the spark plug spacer body 1, and the spacer flange 2 and the spark plug spacer body 1 are processed separately, and are fixed with the help of welding after being nested. In order to improve the reliability of assembly, the outer periphery of the top of the spark plug spacer body 1 is provided with a circular ring bulge 103 which is bulged outwards in the radial direction, and the bottom surface of the inner ring of the spacer flange 2 is provided with a circular ring groove matched with the circular ring bulge 103. After the spark plug spacer body 1 and the spacer flange 2 are respectively processed and formed, the bottom of the spacer flange 2 is sleeved on the top of the spark plug spacer body 1, when the circular groove is in contact with and abuts against the circular ring protrusion 103, the envelope spacer flange 2 is clamped on the top of the spark plug spacer body 1, and then the spark plug spacer body 1 and the spacer flange 2 are welded and fixed along the periphery of the circular ring protrusion 103. The processing difficulty of the spark plug spacer body 1 can be reduced by the arrangement.

In another optional embodiment of the present invention, the spark plug spacer body 1 and the spacer flange 2 are integrally formed during machining, and although the machining difficulty of the spark plug spacer body 1 is increased, the connection between the spacer flange 2 and the spark plug spacer body 1 is more reliable.

In the above embodiment, the two symmetrical sides of the spacer flange 2 are provided with through holes for the fasteners to pass through, and here the fasteners are exemplified by the stud bolts shown in fig. 3. The fastener specifically comprises a first stud 6 and a second stud 7, the first stud 6 and the second stud 7 penetrate through a through hole of the spacer flange 2 and are correspondingly screwed with a mounting hole formed in the engine cylinder cover 01, and the peripheral parts of the upper sections, located above the spacer flange 2, of the first stud 6 and the second stud 7 are respectively sleeved with a cylindrical first cushion block 4 and a cylindrical second cushion block 8 and are connected with a fastening nut 5.

When installing the press-in type spark plug spacer, firstly, the spark plug spacer body 1 is pressed in a spark plug seat hole, so that the sealing surface 102 is attached and sealed with a matching sealing surface in the spark plug seat hole; then, a first stud 6 and a second stud 7 penetrate through a through hole of the spacer flange 2 to be screwed and fixed with a mounting hole on the engine cylinder cover 01; a first cushion block 4 is sleeved on the upper section of the first stud 6, a second cushion block 8 is sleeved on the upper section of the second stud 7, and the fastening nut 5 is screwed to respectively press the first cushion block 4 and the second cushion block 8. The friction force between the fastening nut 5 and the first cushion block 4 or the second cushion block 8 is increased by the counterforce provided when the first cushion block 4 and the second cushion block 8 are in a compressed state, and the fastening nut 5 is prevented from loosening to cause torque reduction and sealing failure.

Further, the first stud 6 and the second stud 7 are studs with different lengths, the length of the first stud 6 is greater than that of the second stud 7, and correspondingly, the depth of a mounting hole which is formed in the engine cylinder head 01 and used for being matched and screwed with the first stud 6 is greater than that of a mounting hole which is matched and screwed with the second stud 7. The locating sleeve 3 is sleeved on the lower section of the first stud 6 penetrating to the lower part of the spacer flange 2, the locating sleeve 3 realizes certain circumferential limit on the first stud 6, vibration caused by rotation of an engine is prevented from driving the body of the spark plug spacer flange 2 to rotate, and matching sealing of the sealing surface 102 of the spark plug spacer body 1 is guaranteed.

Obviously, the first stud 6 and the second stud 7 may also be provided with equal length, and the lower segments of both may also be sleeved with the positioning sleeve 3.

The position that corresponds that spark plug spacer body 1 is located the upper segment of spacer flange 2 top is equipped with first sealing washer 9, and the position that corresponds that the lower section that spark plug spacer body 1 is located spacer flange 2 below is equipped with second sealing washer 10, increases between spark plug spacer body 1 and the spark plug seat hole leakproofness with the help of first sealing washer 9 and the cooperation of second sealing washer 10.

The utility model also provides an engine, including the forced spark plug spacer of engine cylinder lid 01 and the description of above-mentioned embodiment, engine cylinder lid 01 offer with spark plug spacer body 1 complex spark plug seat hole, the mounting hole with spark plug seat hole parallel extension is offered to the week portion in spark plug seat hole, and the mounting hole is seted up with the fastener one-to-one.

The diameter of the spacer bottom 101 is slightly larger than that of the bottom of a spark plug seat hole formed in the engine cylinder head 01, so that the spacer bottom 101 and the bottom of the spark plug seat hole are assembled in an interference mode, and connection reliability is improved.

In addition, the lower end face of spacer flange 2 and engine cylinder head 01 laminating sets up to chamfer 201, and the setting of chamfer 201 can refer to fig. 4, through setting up the lower end face of spacer flange 2 to chamfer 201 for the thickness of spacer flange 2 is from the centre to both sides attenuation, even spacer flange 2 receives heat conduction heat to take place to warp, also can avoid the both sides contact engine cylinder head 01 of spacer flange 2, restriction sealed face 102 and the sealed cooperation of cooperation sealed face.

The position of the spacer flange 2 arranged on the spark plug spacer body 1 needs to meet the following condition, when the spark plug spacer body 1 is pressed in place, namely when the sealing surface 102 is completely attached and sealed with the matching sealing surface of the spark plug seat hole, the distance between the lower end surface of the spacer flange 2 and the upper end surface of the engine cylinder cover 01 is not less than 1mm, namely the distance between the circular ring protrusion 103 and the upper end surface of the engine cylinder cover 01 is more than or equal to 1mm, and the spacer flange 2 is prevented from being deformed by heat and colliding with the engine cylinder cover 01, so that the sealing of the spark plug spacer body 1 is influenced. Other parts of the engine may be arranged with reference to the prior art and no improvement is made to other parts of the engine by the present application.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The engine and the press-in type spark plug spacer provided by the utility model are described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The press-in type spark plug spacer is characterized by comprising a spark plug spacer body (1), a spacer flange (2) fixedly connected to the periphery of the spark plug spacer body (1) and a fastener penetrating through the spacer flange (2) and used for connecting an engine cylinder head (01); the spark plug spacer is characterized in that a shoulder-shaped spacer bottom (101) is arranged at the bottom of the spark plug spacer body (1), and a sealing surface (102) matched with a spark plug seat hole of an engine cylinder cover (01) is arranged at the joint of the spacer bottom (101) and the spark plug spacer body (1).

2. The press-in spark plug spacer according to claim 1, wherein the spacer flange (2) is nested on top of the spark plug spacer body (1) and welded to the spark plug spacer body (1).

3. The press-in type spark plug cup as claimed in claim 2, characterized in that the periphery of the spark plug cup body (1) is provided with a circular ring protrusion (103), and the inner ring of the cup flange (2) is provided with a circular ring groove which is fitted with the circular ring protrusion (103).

4. The press-in spark plug cup as claimed in claim 3, characterized in that the fastening means are embodied as studs, which comprise a first stud (6) and a second stud (7) which are arranged symmetrically on both sides of the cup flange (2).

5. The press-in spark plug cup as claimed in claim 4, characterized in that the first stud (6) is longer than the second stud (7), the first stud (6) and the second stud (7) each penetrating the cup flange (2);

the first stud (6) penetrates through the lower section of the spacer flange (2) and is sleeved with a positioning sleeve (3);

the first stud (6) is located the upper segment cover of spacer flange (2) top is equipped with first cushion (4), second stud (7) is located the upper segment cover of spacer flange (2) top is equipped with second cushion (8).

6. The press-in type spark plug spacer according to any one of claims 1 to 5, wherein the lower end surface of the spacer flange (2) is a chamfered surface (201), and the thickness of the spacer flange (2) is gradually reduced from the center to both sides.

7. The press-in type spark plug spacer as claimed in claim 6, characterized in that the upper section of the spark plug spacer body (1) above the spacer flange (2) is provided with a first sealing ring (9); the lower section of the spark plug spacer body (1) below the spacer flange (2) is sleeved with a second sealing ring (10).

8. An engine, characterized by comprising an engine cylinder head (01) and a press-in type spark plug spacer according to any one of claims 1 to 7, wherein the engine cylinder head (01) is provided with a spark plug seat hole matched with the spark plug spacer body (1), and the periphery of the spark plug seat hole is provided with mounting holes matched with the fasteners one by one.

9. The engine of claim 8, characterized in that the cup bottom (101) is an interference fit with the bottom of the spark plug socket hole.

10. An engine according to claim 9, characterized in that the clearance between the bottom of the spacer flange (2) and the upper end face of the engine cylinder head (01) is equal to or greater than 1mm when the sealing surface (102) is in sealing engagement with the mating sealing surface of the engine cylinder head (01).