CN214464613U

CN214464613U - A drilling seal assembly for forging rail

Info

Publication number: CN214464613U
Application number: CN202023245039.XU
Authority: CN
Inventors: 宋慧慧; 孟少锋; 赵力
Original assignee: Delphi Shanghai Dynamics and Propulsion Systems Co Ltd
Current assignee: Fenia Delphi Automotive Systems (Shanghai) Co.,Ltd.
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-10-22
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a drilling seal assembly for forging rail, including forging rail and end cover, drilling seal assembly still includes the nut, and the outside of forging the one end that the rail was equipped with the drilling is equipped with the external screw thread, the inboard is equipped with the first cooperation portion with end cover matched with, and the nut is hollow structure, and the inboard of nut is equipped with the internal thread that matches with the external screw thread in proper order and the second cooperation portion with end cover matched with; during the use, the end cover is placed between forging rail and nut, through rotating the nut for forge the complete threaded connection of rail and nut, the both ends of end cover butt respectively this moment forge the first cooperation portion of rail and the second cooperation portion of nut. Compared with the prior art, the utility model discloses in the assembling process, the end cover can not relative motion produce wearing and tearing with forging the rail, has reduced and has revealed the risk, and need not to increase brazing process, has reduced manufacturing cost.

Description

A drilling seal assembly for forging rail

Technical Field

The utility model belongs to the technical field of the forging rail and specifically relates to a drilling seal assembly for forging rail is related to.

Background

The working pressure of the direct injection fuel system in the cylinder at present reaches 35MPa, and in order to meet the increasingly strict emission requirement, the working pressure of the fuel supply system can be continuously increased, and the working pressure of 50MPa is the future development trend. The oil rail assembly is used as an important oil way of a fuel supply system, and the structural design and the process flow need to be continuously improved to meet the high-pressure requirement. At present, the integrally forged oil rail is gradually used in the market, a drill hole can be reserved on an oil rail blank through machining, and the end cover is required to be sealed to ensure that fuel oil cannot be leaked under certain high pressure. At present, two connection modes of the forged rail and the end cover are provided, and the connection modes are respectively described as follows:

scheme 1: as shown in figures 1 and 2, the scheme is that a step-shaped groove is further arranged in a drill hole of the first forging rail, an end cover is fixed in the step-shaped groove through a copper brazing process, and a copper ring is formed between the end cover and a step surface of the step-shaped groove.

Scheme 2: as shown in fig. 3 and 4, this solution has an internal thread machined into the drilled end of the first forged rail and an external thread machined into the end cap, both of which are connected by a thread.

The two solutions described above have the following disadvantages:

1) in the scheme 1, a brazing process needs to be added in the copper brazing connection mode, new brazing equipment and a production line need to be added, the production investment is greatly increased, and the product cost is improved.

2) In scheme 2, two parts are connected by using threads, the contact of a fillet (R1) structure at the front end of the end cover and the conical surface of the forging rail ensures sealing, although the production process is simplified, the end cover can meet the requirement of installation torque only by continuously rotating a certain angle after the contact of the fillet and the conical surface, and the contact surfaces of two metal parts can generate hard contact abrasion. There is a risk of wearing the sealing surfaces during assembly resulting in leakage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drilling seal assembly for forging rail in order to overcome the defect that the prior art still needs to increase the sealed face of wearing and tearing in one brazing process, the assembling process.

The purpose of the utility model can be realized through the following technical scheme:

a drilling sealing assembly for a forging rail comprises the forging rail and an end cover, and further comprises a nut, wherein an external thread is arranged on the outer side of one end, provided with a drilling hole, of the forging rail, a first matching portion matched with the end cover is arranged on the inner side of the end, the nut is of a hollow structure, and an internal thread matched with the external thread and a second matching portion matched with the end cover are sequentially arranged on the inner side of the nut;

during the use, place the end cover between forging rail and nut, through rotating the nut for forge the complete threaded connection of rail and nut, the both ends of end cover butt respectively at this moment forges the first cooperation portion of rail and the second cooperation portion of nut.

Furthermore, a fillet is arranged at one corner of the end cover matched with the first matching part, and the first matching part is a first circular truncated cone side face.

Further, the inclination angle of the first truncated cone side surface is within the range of 25 degrees to 35 degrees.

Further, the inclination angle of the first truncated cone side surface is 30 degrees.

Furthermore, the end face of one end, which is matched with the end cover and the first matching part, of the end cover is provided with an arc surface which is sunken towards the inner side of the end cover.

Furthermore, a second circular truncated cone side face is arranged at one corner of the end cover matched with the second matching portion, and the second matching portion is a third circular truncated cone side face matched with the second circular truncated cone side face.

Further, the inclination angle of the third circular truncated cone side surface is within the range of 55 degrees to 65 degrees.

Further, the inclination angle of the third truncated cone side surface is 60 degrees.

Further, the end face of one end, far away from the forging rail, of the end cover is abutted to the end face of one end of the nut.

Further, the cross section of the outer side surface of the nut is polygonal.

Compared with the prior art, the utility model has the advantages of it is following:

(1) this embodiment is fixed the end cover on forging the rail through the nut, forges rail excircle processing helicitic texture, and the nut screw in forges rail screw thread, and the end cover is withstood to inboard afterbody, and the end cover is sealed with forging rail in close contact with assurance, and in this assembling process, the end cover can not relative motion with the forging rail produce wearing and tearing, has reduced and has revealed the risk, compares in prior art, need not to increase the brazing process, has reduced manufacturing cost.

(2) The end cover is provided with an arc surface which is concave towards the inner side, so that the impact force generated by pressure fluctuation can be effectively relieved, and the effect of stabilizing the pressure is achieved.

(3) The end cover is provided with a round angle which is in close contact with the side surface of the first round table of the forging rail, so that the sealing performance is ensured.

Drawings

FIG. 1 is a schematic structural view of a prior art first forged rail of scheme 1 of the background art;

FIG. 2 is a sectional view taken along line A in FIG. 1;

FIG. 3 is a schematic structural view of a prior art second forged rail of scheme 2 of the background art;

FIG. 4 is a sectional view taken along line A in FIG. 3;

FIG. 5 is a schematic diagram of a bore seal assembly for a forged rail in an embodiment of the present invention;

FIG. 6 is a partially enlarged view of the area A in FIG. 5;

FIG. 7 is a cross-sectional view taken along line B of FIG. 6;

FIG. 8 is a schematic structural view of a forged rail according to an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of the area A of FIG. 8;

FIG. 10 is a cross-sectional view taken along line B of FIG. 9;

fig. 11 is a front view of the nut in an embodiment of the present invention;

fig. 12 is a top view of a nut in an embodiment of the invention;

FIG. 13 is a cross-sectional view taken along line A of FIG. 11;

fig. 14 is a front view of an end cap according to an embodiment of the present invention;

FIG. 15 is an enlarged view of a portion of the area A of FIG. 14;

FIG. 16 is a cross-sectional view taken along line B of FIG. 14;

in the figure, 1, a forging rail, 101, an external thread, 102, a first circular truncated cone side face, 2, an end cover, 201, a fillet, 202, an arc face, 203, a second circular truncated cone side face, 3, a nut, 301, an internal thread, 302, a third circular truncated cone side face, 4, an existing first forging rail, 5, an existing first end cover, 6, a copper ring, 7, an existing second forging rail, 8 and an existing second end cover.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

As shown in fig. 5 to 9, the present embodiment provides a drilling sealing assembly for a forged rail, which includes a forged rail 1 and an end cover 2, and further includes a nut 3, where an outer side of one end of the forged rail 1, where a drill hole is formed, is provided with an external thread 101, an inner side of the end of the forged rail is provided with a first matching portion matched with the end cover 2, the nut 3 is of a hollow structure, and an inner side of the nut 3 is sequentially provided with an internal thread 301 matched with the external thread 101 and a second matching portion matched with the end cover 2;

during the use, place end cover 2 and forge between rail 1 and nut 3, through rotating nut 3 for forge rail 1 and nut 3 complete threaded connection, the both ends of end cover 2 butt respectively this moment forge the first cooperation portion of rail 1 and the second cooperation portion of nut 3.

Adopt the scheme of this embodiment, realize fixing the end cover on forging the rail by the nut, forge rail excircle processing helicitic texture, the end cover need not to process the screw thread, nut screw in forges the rail screw thread, and the end cover is withstood to inboard afterbody, and the end cover is sealed with forging rail in close contact with assurance, and in this assembling process, the end cover can not relative motion with forging the rail and produce wearing and tearing, has reduced and has revealed the risk, compares in prior art, need not to increase the brazing technology, has reduced manufacturing cost.

As a preferred embodiment, as shown in fig. 10 and 14 to 16, a corner of the end cap 2 where the first mating portion is mated with the first circular truncated cone side surface 102 is provided with a rounded corner 201.

In a preferred embodiment, the first frustoconical side surface 102 is inclined at an angle within a range of 25 to 35 degrees.

In a preferred embodiment, the first frustoconical side surface 102 is inclined at an angle of 30 degrees, corresponding to a virtual conical taper of the first frustoconical side surface 102 of 60 degrees.

The fillet 201 of the end cover 2 is in close contact with the first round table side surface 102 with the forging rail virtual cone taper of 60 degrees to ensure sealing.

As a preferred embodiment, as shown in fig. 16, an end face of the end cap 2 at the end where the first engagement portion engages with the end cap 2 is provided with an arc surface 202 recessed inward of the end cap 2, which effectively relieves the impact force generated by pressure fluctuation and acts to stabilize the pressure.

As a preferred embodiment, as shown in fig. 11 to 13, a corner of the end cap 2 where the second engagement portion engages with the second truncated cone side surface 203 is provided with a second truncated cone side surface 302, and the second engagement portion is a third truncated cone side surface 302 engaging with the second truncated cone side surface 203.

In a preferred embodiment, the third truncated cone side surface 302 has an inclination angle within a range of 55 degrees to 65 degrees.

In a preferred embodiment, the third frustoconical side surface 302 is inclined at an angle of 60 degrees.

In a preferred embodiment, an end surface of the end cap 2 remote from the forged rail 1 abuts an end surface of one end of the nut 3.

As a preferred embodiment, as shown in fig. 11 and 12, the cross section of the outer side surface of the nut 3 is a polygon, and the present embodiment is a regular hexagon.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The drilling sealing assembly for the forging rail comprises a forging rail (1) and an end cover (2), and is characterized by further comprising a nut (3), wherein an external thread (101) is arranged on the outer side of one end, provided with a drilling hole, of the forging rail (1), a first matching part matched with the end cover (2) is arranged on the inner side of the end cover, the nut (3) is of a hollow structure, and an internal thread (301) matched with the external thread (101) and a second matching part matched with the end cover (2) are sequentially arranged on the inner side of the nut (3);

during the use, end cover (2) are placed and are forged between rail (1) and nut (3), through rotating nut (3) for forge rail (1) and nut (3) complete threaded connection, the both ends of end cover (2) butt respectively this moment forge the first cooperation portion of rail (1) and the second cooperation portion of nut (3).

2. A bore seal assembly for a forged rail according to claim 1, wherein a corner of the end cap (2) mating with the first mating portion is provided with a rounded corner (201), and the first mating portion is a first frustoconical side surface (102).

3. The bore seal assembly for a forged rail of claim 2, wherein the angle of inclination of said first frustoconical side (102) is within the range of 25 degrees to 35 degrees.

4. A bore seal assembly for a forged rail according to claim 3, wherein the angle of inclination of said first frustoconical side (102) is 30 degrees.

5. A bore seal assembly for a forged rail according to claim 1, wherein an end face of the end cap (2) at the end where the first engagement portion engages is provided with a circular arc surface (202) recessed inward of the end cap (2).

6. A bore seal assembly for a forged rail according to claim 1, wherein a corner of said end cap (2) mating with said second mating portion is provided with a second frustoconical side (203), and said second mating portion is a third frustoconical side (302) mating with said second frustoconical side (203).

7. The bore seal assembly for a forged rail of claim 6, wherein the angle of inclination of said third frustoconical side (302) is within the range of 55 degrees to 65 degrees.

8. The bore seal assembly for a forged rail of claim 7, wherein the angle of inclination of said third frustoconical side (302) is 60 degrees.

9. A bore seal assembly for a forged rail according to claim 1, wherein an end face of the end cap (2) remote from the forged rail (1) abuts an end face of an end of the nut (3).

10. A bore seal assembly for a forged rail according to claim 1, wherein the outer side surface of the nut (3) is polygonal in cross-section.