CN217735642U

CN217735642U - Press-in type spark plug spacer

Info

Publication number: CN217735642U
Application number: CN202222119941.XU
Authority: CN
Inventors: 吴明明; 符兴胜; 王兵; 宋小军; 储利民; 吴昊; 刘凯; 纪丽伟
Original assignee: Shanghai New Power Automotive Technology Co ltd
Current assignee: Shanghai New Power Automotive Technology Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-11-04
Anticipated expiration: 2032-08-12

Abstract

The utility model relates to a forced spark plug spacer belongs to engine technical field, and its spark plug spacer inside wall is equipped with the internal thread that is used for installing the spark plug, and spark plug spacer top is equipped with the spacer clamping ring, and the spacer clamping ring is equipped with one or more open type fixed slots. The utility model discloses a circumferential motion of interference fit assembly and restriction spacer has fundamentally solved the poor problem of current screw-in spacer leakproofness, reliability.

Description

Press-in type spark plug spacer

Technical Field

The utility model belongs to the technical field of the engine, especially, relate to a forced spark plug spacer.

Background

In order to improve the cooling effect of the nose bridge area of the cylinder head of some current heavy-duty engines, a through water jacket is generally designed at the spark plug hole and the nose bridge area, and a spacer is arranged at the spark plug hole for mounting a spark plug.

In the prior art, a spark plug spacer is usually in a threaded screwing structure, namely, an internal thread is processed in a spacer hole on a cylinder cover, an external thread is processed on the spacer, the spacer is screwed and assembled into the cylinder cover through a threaded structure, and meanwhile, the internal thread is processed on the spacer and used for installing a spark plug.

The thread screwing type spacer has the main defect that the sealing performance of the spacer is poor, and the main technology is to glue, screw and seal the spacer through the external threads of the spacer and the mounting surface or to tightly press and seal the spacer by adopting a copper gasket. The screw thread screw-in type spacer sleeve is characterized in that the inner thread and the outer thread are arranged on the inner side and the outer side of the screw thread screw-in type spacer sleeve, the spacer sleeve is fixed on a cylinder cover through the outer thread, the spark plug is fixed on the spacer sleeve through the inner thread, when the spacer sleeve is disassembled and unscrewed, the spacer sleeve can be loosened due to overlarge disassembling torque, and therefore the spacer sleeve leaks water due to sealing failure of the spacer sleeve.

Therefore, a common solution is to set the tightening torque of the spacer much larger than that of the spark plug so that the spacer is not loosened when the spark plug is disassembled, but this method increases the assembly difficulty and cannot completely solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at: the utility model provides a press-in type spark plug spacer, solves current screw-in type spacer leakproofness, the poor problem of reliability.

In order to achieve the above object, the technical scheme of the utility model a forced spark plug spacer is provided, spark plug spacer inside wall is equipped with the internal thread that is used for installing the spark plug, spark plug spacer top is equipped with the spacer clamping ring, the spacer clamping ring is equipped with one or more open type fixed slots.

Preferably, the spacer compression ring and the spark plug spacer are of an integral structure.

Preferably, the spacer compression ring and the spark plug spacer are welded into a whole.

Preferably, the open fixing groove has a U-shaped structure and may penetrate in an axial direction of the spark plug spacer.

Preferably, a stud bolt can be arranged in the opening type fixing groove, and a bushing and a nut can be sequentially arranged on the stud bolt along the direction away from the opening type fixing groove.

Preferably, the outer side of the stud is provided with a stud conical surface for guiding.

Preferably, an open type semicircular hole matched with the stud bolt is formed in the open type fixing groove.

Preferably, a guiding conical surface for guiding is arranged at the position, close to the bottom, of the spark plug spacer.

Preferably, an O-shaped ring installation groove is formed in the outer side of the spark plug spacer, and an O-shaped ring for sealing is arranged in the O-shaped ring installation groove.

Preferably, the bottom of the spark plug spacer is in interference fit with the cylinder cover.

Preferably, the bottom of the spark plug spacer sleeve is provided with a glue layer.

To sum up, the utility model discloses a following beneficial technological effect:

the utility model discloses an interference fit impresses in the cylinder head, sets up the open type fixed slot at 2 stud and spark plug spacer tops simultaneously at the top surface of cylinder head and matches to the circumference of restriction spacer rotates, makes the spark plug can not take the pine spacer when screwing up or disassembling, has improved the leakproofness and the reliability of spacer, has fundamentally solved the current screw-in type spacer leakproofness, the poor problem of reliability.

Drawings

FIG. 1 is a schematic perspective view of a spark plug spacer according to the present invention;

FIG. 2 is a schematic cross-sectional view of a spark plug spacer according to the present invention;

FIG. 3 is a schematic view of the assembly of the cylinder head, spark plug spacer and spark plug;

fig. 4 is a schematic view of the spark plug spacer mounted on the cylinder head.

Reference numerals are as follows: 1. a cylinder head; 11. a cylinder head water jacket; 2. a spark plug spacer; 21. an O-shaped ring mounting groove; 22. an O-shaped ring; 23. an internal thread; 24. a guiding conical surface; 3. a spacer bush is pressed; 31. an open type fixing groove; 32. an open type semicircular hole; 4. a stud; 41. a stud taper; 5. a bushing; 6. a nut; 7. a spark plug.

Detailed Description

The present invention will be described in further detail with reference to fig. 1 to 4.

The embodiment of the utility model discloses forced

spark plug spacer

2, 2 tops of spark plug spacer are equipped with spacer clamping ring 3, and

spark plug spacer

2 and 3 two parts of spacer clamping ring are passed through welding method and are constituteed integratively, also can directly regard as an organic whole structure.

A section of guiding conical surface 24 is arranged at the position of the spark plug spacer 2 close to the bottom along the axial direction, and the conical surface plays a guiding role in the process that the spark plug spacer 2 is pressed into the cylinder cover 1; the inner side wall of the spark plug spacer 2 is also provided with internal threads 23, and the internal threads 23 are used for installing the spark plug 7.

An O-shaped ring mounting groove 21 is formed in the outer surface of the middle part of the spark plug spacer 2 along the axial direction, and an O-shaped ring 22 for sealing the upper part of the spark plug spacer 2 is arranged in the O-shaped ring mounting groove 21; when the spark plug spacer 2 is arranged on the cylinder cover 1, the O-shaped ring 22 is positioned above the cylinder cover water jacket 11, and the bottom of the spark plug spacer 2 is sealed by gluing and interference fit; in addition, the bottom of the spark plug spacer 2 is also provided with a convex ring.

Spacer clamping ring 3 is equipped with two opposite open type fixed slots 31 of orientation at both ends, open type fixed slot 31 link up for U type structure and along the axial of spark plug spacer 2, can wear to be equipped with stud 4 in the open type fixed slot 31, the installation back open type fixed slot 31 that targets in place can restrict the circumferential rotation of spark plug spacer 2, wherein the inside wall of open type fixed slot 31 is equipped with open type semicircle orifice 32, open type semicircle orifice 32 and stud 4 phase-matches, be equipped with stud conical surface 41 on the stud 4, lead at the pressure equipment in-process for spark plug spacer 2.

Will the utility model discloses the method of assembling in cylinder head 1 is as follows:

an adaptive O-shaped ring 22 is arranged in an O-shaped ring mounting groove 21 of the spark plug spacer 2;

arranging a spark plug spacer sleeve hole for installation on the cylinder cover 1, and pressing the spark plug spacer sleeve 2 into the cylinder cover 1 by pressure, wherein the spark plug spacer sleeve 2 is in interference fit with the installation hole in the bottom of the cylinder cover 1 and is coated with glue;

two stud bolts 4 are arranged at the top of the cylinder cover 1, the two stud bolts 4 respectively penetrate through the lining 5 and the opening type fixing groove 31 in sequence to be in threaded connection with the cylinder cover 1, the side, away from the opening type fixing groove 31, of the lining 5 is in threaded connection with the nut 6, and the spark plug spacer 2 is fastened through the stud bolts 4, the lining 5 and the nut 6.

Above is the preferred embodiment of the utility model, not limit according to this the utility model discloses a protection scope, the event: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present invention.

Claims

1. A press-in type spark plug spacer, characterized in that: spark plug spacer (2) inside wall is equipped with internal thread (23) that are used for installing spark plug (7), spark plug spacer (2) top is equipped with spacer clamping ring (3), spacer clamping ring (3) are equipped with one or more open type fixed slot (31).

2. The press-in type spark plug cup as set forth in claim 1, wherein: the spacer compression ring (3) and the spark plug spacer (2) are of an integrated structure.

3. The press-in type spark plug cup as claimed in claim 2, wherein: the spacer compression ring (3) and the spark plug spacer (2) are welded into a whole.

4. A press-in type spark plug boot as claimed in any one of claims 1 to 3, wherein: the open type fixing groove (31) is of a U-shaped structure and can penetrate through the spark plug spacer sleeve (2) in the axial direction.

5. The press-in type spark plug cup as claimed in claim 4, wherein: can be equipped with stud (4) in open type fixed slot (31), stud (4) are along keeping away from open type fixed slot (31) direction can be equipped with bush (5) and nut (6) in proper order.

6. The press-in type spark plug cup as claimed in claim 5, wherein: an open semicircular hole (32) matched with the stud bolt (4) is arranged in the open fixing groove (31).

7. A press-in type spark plug cup as claimed in any one of claims 1 to 3 wherein: and a guiding conical surface (24) for guiding is arranged at the position, close to the bottom, of the spark plug spacer sleeve (2).

8. A press-in type spark plug boot as claimed in any one of claims 1 to 3, wherein: an O-shaped ring mounting groove (21) is formed in the outer side of the spark plug spacer sleeve (2), and an O-shaped ring (22) used for sealing is arranged in the O-shaped ring mounting groove (21).

9. A press-in type spark plug cup as claimed in any one of claims 1 to 3 wherein: the bottom of the spark plug spacer sleeve (2) is in interference fit with the cylinder cover (1).

10. A press-in type spark plug cup as claimed in any one of claims 1 to 3 wherein: and a glue layer is arranged at the bottom of the spark plug spacer sleeve (2).