CN113819312A

CN113819312A - Engine oil sprayer oil return structure connected by conical snap ring

Info

Publication number: CN113819312A
Application number: CN202111152408.7A
Authority: CN
Inventors: 苏金龙; 覃星念; 李明星; 赵令猛
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2021-12-21

Abstract

The invention discloses an oil return structure of an engine oil sprayer connected by a conical snap ring, which comprises: the outer wall of the connecting body is provided with a clamping groove, and the clamping groove is positioned in the middle of the connecting body; the oil return pipe can be inserted into the bottom of the connector, and an installation groove is formed in the outer part of the oil return pipe; and the clamping ring is clamped in the clamping groove on the outer wall of the connecting body and corresponds to the mounting groove formed outside the oil return pipe. According to the oil return structure of the engine oil sprayer connected by the conical clamping ring, firstly, the sealing surface is enlarged, the sealing requirement is reduced, and the oil leakage fault is reduced through the interference fit of the oil return pipe and the connecting body conical surface sealing structure, the mounting hole and the sleeve pipe surface sealing structure; secondly, the structure is sealed in an interference fit manner, and rubber is not used, so that the risks of rubber trimming failure, aging failure and the like are avoided; thirdly, the outside through the connector sets up the draw-in groove to correspond with the outside mounting groove of time oil pipe, not only strengthened the leakproofness, simplified the installation moreover.

Description

Engine oil sprayer oil return structure connected by conical snap ring

Technical Field

The invention relates to the technical field of fuel engines, in particular to an oil return structure of an engine oil sprayer connected by a conical clamping ring.

Background

Along with the upgrading of emission and oil consumption regulations, a high-pressure common rail fuel injection system is basically adopted for a whole vehicle and an engine, an oil injector is used as an important component of the fuel injection system, not only is the atomization of fuel controlled, but also the fuel injection quantity is controlled, redundant fuel in the oil injector needs to be returned to a fuel distributor from an oil return hole of the oil injector through an oil return pipe for recycling, so that the quality of oil returned by the oil injector is critical to the fuel system of the engine, and the existing oil return structure has the following defects: 1. the existing oil return structure adopts rubber rings such as a combined gasket, an O-shaped ring and the like for sealing, and has the problems of small sealing surface, high oil leakage fault and the like only by linear sealing; 2. no matter the rubber ring such as a combined pad or an O-shaped ring is soaked in diesel oil for a long time, the risk of aging and sealing failure of the rubber ring is easy to occur, and therefore the oil return structure of the engine oil injector connected by the conical clamping ring is provided.

Disclosure of Invention

The invention mainly aims to provide an oil return structure of an engine oil sprayer connected by a conical snap ring, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

an engine injector oil return structure that toper snap ring is connected includes:

the outer wall of the connecting body is provided with a clamping groove, and the clamping groove is positioned in the middle of the connecting body;

the oil return pipe can be inserted into the bottom of the connecting body, and an installation groove corresponding to the clamping groove in position is formed in the outer part of the oil return pipe; and

and the clamping ring is clamped in the clamping groove on the outer wall of the connecting body and corresponds to the mounting groove formed outside the oil return pipe.

Preferably, the top of the oil return pipe is conical, and the bottom of the connector is provided with a conical groove corresponding to the top of the oil return pipe.

Preferably, the clamping holes are formed in the two ends of the clamping ring.

Preferably, the top of the oil return pipe is provided with a sleeve, and the sleeve is correspondingly inserted into a mounting hole formed in the top of the oil return pipe.

Preferably, the outside of the sleeve is connected with the inner wall of the connector through a thread, and the two sides of the sleeve are both provided with a baffle plate and correspond to the sliding grooves arranged on the inner walls of the two sides of the mounting hole.

Preferably, the two sides of the oil return pipe are both connected with limiting clamps through hinges, the outer wall of each limiting clamp is provided with a protrusion, and the protrusion outside the limiting clamp corresponds to the butt joint hole formed outside the connector.

Compared with the prior art, the invention has the following beneficial effects:

firstly, through interference fit of the oil return pipe and the connector conical surface sealing structure, the mounting hole and the sleeve surface sealing structure, the sealing surface is enlarged, the sealing requirement is reduced, and the oil leakage fault is reduced;

and secondly, the structure is sealed through interference fit, rubber is not used, and therefore the risks of rubber trimming failure, aging failure and the like are avoided.

Thirdly, the clamping groove is formed in the outer portion of the connecting body and corresponds to the mounting groove in the outer portion of the oil return pipe, so that the sealing performance is enhanced, the mounting is simplified, and the assembly and the maintenance are facilitated;

fourthly, the thread is arranged outside the sleeve, the baffle plates are arranged on two sides of the sleeve, the connector and the oil return pipe can be always communicated, leakage is avoided, and the use safety of the device is improved.

Drawings

FIG. 1 is an overall cross-sectional view of an oil return structure of an engine oil injector connected by a tapered snap ring according to the present invention;

FIG. 2 is an exploded view of the overall structure of an oil return structure of an engine oil injector connected by a conical snap ring according to the present invention;

FIG. 3 is a top view of a snap ring in an oil return structure of an engine oil injector connected by a tapered snap ring according to the present invention;

FIG. 4 is a structural diagram of a sleeve and an oil return pipe in an oil return structure of an engine oil injector connected by a conical snap ring.

In the figure: 1. a linker; 2. an oil return pipe; 3. a sleeve; 4. a snap ring; 5. and a limiting clamp.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1-4, an oil return structure of an engine oil injector connected by a conical snap ring comprises:

the outer wall of the connecting body 1 is provided with a clamping groove, and the clamping groove is positioned in the middle of the connecting body 1;

the oil return pipe 2 can be inserted into the bottom of the connector 1, and an installation groove corresponding to the clamping groove in position is formed in the outer part of the oil return pipe 2; and

and the clamping ring 4 is clamped in a clamping groove in the outer wall of the connector 1 and corresponds to an installation groove formed in the outer part of the oil return pipe 2.

Referring to fig. 1 and 2, the top of the oil return pipe 2 is conical, and the bottom of the connector 1 is provided with a conical groove corresponding to the top of the oil return pipe 2.

Referring to fig. 3, the clamping holes are formed at both ends of the snap ring 4.

Referring to fig. 2, a sleeve 3 is arranged at the top of the oil return pipe 2, and the sleeve 3 is correspondingly inserted into a mounting hole formed at the top of the oil return pipe 2.

Referring to fig. 4, the outside of the sleeve 3 is connected with the inner wall of the connector 1 by a thread, and the baffles are arranged on both sides of the sleeve 3 and correspond to the sliding grooves arranged on the inner walls on both sides of the mounting hole.

Referring to fig. 2 and 4, both sides of the oil return pipe 2 are connected with limit clamps 5 through hinges, a protrusion is arranged on the outer wall of each limit clamp 5, and the protrusion outside each limit clamp 5 corresponds to a butt joint hole arranged outside the connector 1.

When the connector is used, the sleeve 3 is firstly inserted into the mounting hole at the top of the oil return pipe 2, the baffle plates at two sides of the sleeve 3 correspond to the sliding grooves on the inner walls at two sides of the mounting hole, then the oil return pipe 2 is inserted into the connector 1, and the oil return pipe 2 is rotated simultaneously, because the outer part of the sleeve 3 and the inner wall of the connector 1 are both provided with threads, and the sleeve 3 is connected with the oil return pipe 2 through the baffle plates, when the oil return pipe 2 rotates, the sleeve 3 can be driven to rotate, so that the sleeve 3 is in threaded connection with the connector 1, when the mounting groove at the outer wall of the oil return pipe 2 is opposite to the clamping groove at the outer part of the connector 1, the clamping ring 4 is clamped into the clamping groove, so that the clamping ring 4 is connected between the connector 1 and the oil return pipe 2, the separation between the connector 1 and the oil return pipe 2 is prevented, and finally the limiting clamps 5 at two sides of the oil return pipe 2 are pushed towards the connector 1, so that the bulges at the inner sides of the limiting clamps 5 correspond to the butting holes at the outer side of the connector 1, at this moment, the connector 1 and the oil return pipe 2 cannot rotate relatively, so that the connector 1 is placed to be separated from the oil return pipe 2, and meanwhile, when slight shaking occurs between the connector 1 and the oil return pipe 2, the sleeve 3 is always connected with the connector 1 and slides in the oil return pipe 2, so that the sealing performance between the connector 1 and the oil return pipe 2 can be kept when the connector 1 is separated from the oil return pipe 2.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an engine fuel injector oil return structure that toper snap ring is connected which characterized in that includes:

the outer wall of the connecting body (1) is provided with a clamping groove, and the clamping groove is positioned in the middle of the connecting body (1);

the oil return pipe (2) can be inserted into the bottom of the connector (1), and an installation groove corresponding to the clamping groove in position is formed in the outer part of the oil return pipe (2); and

and the clamping ring (4) is clamped in the clamping groove on the outer wall of the connector (1) and corresponds to the mounting groove formed in the outer part of the oil return pipe (2).

2. The oil return structure of the engine oil injector connected by the conical clamping ring according to claim 1, is characterized in that: the top of the oil return pipe (2) is conical, and the bottom of the connector (1) is provided with a conical groove corresponding to the top of the oil return pipe (2).

3. The oil return structure of the engine oil injector connected by the conical clamping ring according to claim 1, is characterized in that: and clamping holes are formed at two ends of the clamping ring (4).

4. The oil return structure of the engine oil injector connected by the conical clamping ring according to claim 1, is characterized in that: the top of the oil return pipe (2) is provided with a sleeve (3), and the sleeve (3) is correspondingly inserted into a mounting hole formed in the top of the oil return pipe (2).

5. The oil return structure of the engine oil injector connected by the conical clamping ring according to claim 4, is characterized in that: the outside of sleeve pipe (3) is through setting up the inner wall connection of screw thread with connector (1), and the baffle has all been seted up to the both sides of sleeve pipe (3) to correspond with the spout of seting up at mounting hole both sides inner wall.

6. The oil return structure of the engine oil injector connected by the conical clamping ring according to claim 1, is characterized in that: the both sides of returning oil pipe (2) all have spacing clamp (5) through hinge connection to it is protruding to install at the outer wall of spacing clamp (5), and the outside arch of spacing clamp (5) corresponds with the butt joint hole of seting up in connector (1) outside.