Fuel pipe male joint for outboard engine

Abstract

The fuel pipe male connector for the outboard engine comprises a connector body and a valve element, a mounting cavity is formed in the connector body, and the valve element is arranged in the mounting cavity in a sliding mode; a sealing cover is arranged at one end of the mounting cavity, an inserting pipe communicated with the mounting cavity is arranged on the outer side of the sealing cover, and a guide hole is formed in the end, away from the sealing cover, of the inserting pipe; a first sealing ring is arranged on the inner side of the sealing cover, and the end face of the valve element can abut against the first sealing ring under the action of the spring. A valve rod is arranged at one end of the valve element, and the valve rod is coaxially inserted into the inserting pipe and extends out of the guide hole. The guide hole is used for guiding the valve rod, the inner wall of the cavity is used for guiding the valve element, the valve element can be prevented from inclining in the moving process, quick resetting of the valve element is facilitated, and fuel oil leakage can be avoided. On the basis of an original structure, the guide hole with the closing-in design is additionally arranged, so that the guide effect on the valve element can be enhanced, the structure is simple, and the fuel pipe male connector is suitable for optimization and transformation of an existing fuel pipe male connector.

Description

TECHNICAL FIELD

[0001] The utility model relates to outboard motor technical field, concretely relates to a fuel pipe male joint for outboard motor. BACKGROUND

[0002] When the engine of the outboard motor is running, the fuel and air are mixed, atomized and then introduced into the combustion chamber to burn and work to provide power through the carburetor / throttle valve. When the outboard motor uses an external fuel tank, the fuel pipe of the outboard motor needs to be connected to the fuel pipe of the external fuel tank through the fuel pipe joint.

[0003] The working principle of the conventional fuel pipe joint (male joint) is as follows: a valve core is slidably arranged in the cavity of the joint body, and the valve core elastically abuts against the sealing ring and other sealing structures under the action of the spring to close the oil passage reserved between the valve core and the joint body. The valve rod of the valve core extends from the joint body, and when the fuel pipe joint (male joint) is inserted into the fuel pipe joint (female joint), the steel ball or plunger structure in the fuel pipe joint (female joint) abuts against the valve rod to push the valve core away from the sealing structure, the oil passage is open, and the fuel enters the internal oil passage of the outboard motor; when the fuel pipe joint (female joint) is pulled out, the valve core is reset under the action of the spring, and the oil passage is closed again. However, the existing valve core is usually guided by the inner wall of the cavity during reciprocating movement, and is easy to tilt during movement; when the tilt is too large, the reset is delayed, or the reset is not complete, which leads to fuel leakage, which is not environmentally friendly and has certain safety hazards. SUMMARY

[0004] Therefore, the embodiments of the utility model provide a fuel pipe male joint for outboard motor to solve the technical problem that the valve core in the existing fuel pipe male joint is easy to tilt during movement and leads to fuel leakage.

[0005] The utility model discloses an outboard motor fuel pipe male joint, which comprises a joint body and a valve core, a connecting pipe for connecting with a fuel pipe is arranged on the joint body, an installation cavity in communication with the connecting pipe is formed in the joint body, a cover is arranged at one end of the installation cavity away from the connecting pipe, the cover is in sealing connection with the joint body, a plug-in pipe in communication with the installation cavity is coaxially arranged on the outer side of the cover, a guide hole is formed in the center of one end of the plug-in pipe away from the cover, and an oil inlet hole is formed in the side wall of the plug-in pipe.

[0006] The valve core is slidably arranged in the mounting cavity and can reciprocate along the mounting cavity towards or away from the cover; an oil passing groove is formed through the outer side wall of the valve core in the axial direction; a first sealing ring is arranged on the inner side of the cover; a spring is arranged between the valve core and the joint body, and the spring is configured to apply an elastic force to the valve core to make the end surface of the valve core abut against the first sealing ring; a valve rod is coaxially fixed to one end of the valve core towards the cover, the valve rod is coaxially inserted into the plug-in pipe and extends out of the guide hole, and the valve rod and the guide hole are in clearance fit.

[0007] Optionally, the cover is fixedly embedded in the mounting cavity, and a limiting step for limiting the cover is formed on the inner side wall of the mounting cavity; a second sealing ring is arranged between the cover and the limiting step.

[0008] Optionally, a side plate extending into the mounting cavity is arranged on the outer periphery of the cover, the side plate encloses a cavity in communication with the mounting cavity, and the valve core is arranged in the cavity.

[0009] Optionally, the first sealing ring is an O-shaped sealing ring, and an outer tapered surface for abutting and sealing with the first sealing ring is formed on the end of the valve core.

[0010] Optionally, a plurality of oil passing grooves are uniformly arranged on the circumference of the valve core.

[0011] The embodiments of the present application have the following beneficial effects:

[0012] 1. The guide hole is formed by a necking at the end of the plug-in pipe, the valve rod is guided at the outer end by the guide hole, and the valve core is guided at the inner end by the inner wall of the cavity, so that the inclination of the valve core during movement is effectively prevented, the valve core is quickly reset, and fuel leakage is effectively avoided.

[0013] 2. The guide hole designed by the necking on the basis of the original structure can enhance the guiding effect on the valve core, the structure is simple, and the existing fuel pipe male joint can be optimized and transformed. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0015] Figure 1 The structural schematic diagram of the embodiments of the present application is shown in the drawings;

[0016] Figure 2 It is the structure schematic view of valve core in the embodiment of the utility model;

[0017] Figure 3 It is the transverse section view of valve core and cover in the embodiment of the utility model;

[0018] The figure number indicates:

[0019] 1, joint body;2, valve core;3, cover;4, first sealing ring;5, spring;6, connecting pipe;7, installation cavity;8, plug-in pipe;9, guide hole;10, oil inlet hole;11, oil passing groove;12, valve rod;13, second sealing ring;14, side plate. Specific implementation

[0020] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific implementation described herein is only used for illustration and explanation of the utility model, and is not used for limiting the utility model. In the utility model, the terms "first", "second" and the like are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0021] Please refer to Figure 1 The embodiment of the utility model provides a kind of fuel pipe male joint for outboard engine, it mainly includes joint body 1, valve core 2, cover 3, first sealing ring 4 and spring 5 etc. component.Joint body 1 is equipped with the connecting pipe 6 for being connected with fuel pipe, installation cavity 7 is opened in joint body 1, and installation cavity 7 is connected with connecting pipe 6.Cover 3 is covered in the end of installation cavity 7 away from connecting pipe 6, and cover 3 is sealedly connected with joint body 1, to prevent installation cavity 7 from leaking.Cover 3 is coaxially provided with the plug-in pipe 8 for being connected with fuel pipe female joint on the outside, the plug-in pipe 8 is communicated with installation cavity 7, the end of plug-in pipe 8 away from cover 3 is retracted to center and forms guide hole 9, and oil inlet hole 10 is opened on the side wall of plug-in pipe 8.

[0022] As Figure 2 , Figure 3As shown, the outer side wall of the valve core 2 is provided with an oil passage 11 along the axial direction; in order to ensure the fuel flow efficiency, a plurality of oil passages 11 can be uniformly arranged on the circumference of the valve core 2. Figure 1 As shown, the valve core 2 is slidingly arranged in the mounting cavity 7 and can reciprocate along the mounting cavity 7 towards or away from the cover 3. The first sealing ring 4 is arranged on the inner side of the cover 3, and the spring 5 is arranged between the valve core 2 and the connector body 1, and the spring 5 is configured to apply an elastic force to the valve core 2 to make the end face of the valve core 2 abut against the first sealing ring 4, so as to close one end of the oil passage 11 by the first sealing ring 4. In order to ensure the sealing effect, the first sealing ring 4 can be an O-shaped sealing ring, and the end of the valve core 2 is formed with an outer tapered surface for abutting and sealing with the first sealing ring 4.

[0023] The end of the valve core 2 coaxially fixed with the valve rod 12 is coaxially inserted into the insertion pipe 8 and extends out of the guide hole 9. When the outboard engine is working, the fuel pipe male connector and the fuel pipe female connector need to be inserted, and the structure such as steel ball or plunger in the fuel pipe female connector abuts against the valve rod 12 to push the valve core 2 inward away from the first sealing ring 4, so that both ends of the oil passage 11 are communicated, and the fuel in the external fuel tank can smoothly enter the internal oil circuit of the outboard engine. When the outboard engine is not working, the fuel pipe female connector can be pulled out, and at this time the valve core 2 can be reset under the action of the spring 5 to reseal the oil passage 11 to prevent fuel leakage.

[0024] The valve rod 12 and the guide hole 9 are in clearance fit, and when the valve core 2 reciprocates in the mounting cavity 7, the guide hole 9 can guide the valve rod 12 at the outer end, and the inner wall of the cavity can guide the valve core 2 at the inner end, thereby effectively preventing the valve core 2 from tilting during movement, which is beneficial to the rapid reset of the valve core 2 and can effectively prevent fuel leakage.

[0025] Specifically, the cover 3 is fixedly embedded in the mounting cavity 7, and a limiting step for limiting the cover 3 is formed on the inner side wall of the mounting cavity 7, and a second sealing ring 13 is arranged between the cover 3 and the limiting step to ensure the sealing therebetween. Further, an inwardly extending side plate 14 can be arranged on the outer periphery of the cover 3 and extend into the mounting cavity 7, and the side plate 14 surrounds to form a cavity in communication with the mounting cavity 7, and the valve core 2 can be installed in the cavity. The inwardly extending side plate 14 can increase the contact area between the cover 3 and the connector body 1, thereby improving the stability and sealing performance of the connection between the cover 3 and the connector body 1.

[0026] The principle and implementation mode of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the technical scheme and core idea of the present application; it should be understood by those skilled in the art that the technical scheme recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and the modification or replacement does not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the present application.

Claims

1. An outboard engine fuel pipe male connector characterized by: The application relates to a fuel joint valve, which comprises a joint body and a valve core; a connecting pipe for connecting with a fuel pipe is arranged on the joint body, an installation cavity in communication with the connecting pipe is arranged in the joint body, an end of the installation cavity away from the connecting pipe is provided with a cover, the cover is in sealing connection with the joint body, a plug-in pipe in communication with the installation cavity is coaxially arranged on the outer side of the cover, a guide hole is formed in the end of the plug-in pipe away from the cover, and an oil inlet hole is arranged on the side wall of the plug-in pipe. The valve core is slidably arranged in the installation cavity and can reciprocate along the installation cavity towards the cover or away from the cover, an oil passing groove is arranged on the outer side wall of the valve core in the axial direction, a first sealing ring is arranged on the inner side of the cover, a spring is arranged between the valve core and the joint body, the spring is configured to apply an elastic force to the valve core to make the end surface of the valve core abut against the first sealing ring, a valve rod is coaxially fixed to one end of the valve core towards the cover, the valve rod is coaxially inserted into the plug-in pipe and extends out of the guide hole, and the valve rod is in clearance fit with the guide hole.

2. An outboard engine fuel pipe male connector according to claim 1, characterized in that: The cover is fixedly embedded in the installation cavity, a limiting step for limiting the cover is formed on the inner side wall of the installation cavity, and a second sealing ring is arranged between the cover and the limiting step.

3. An outboard engine fuel pipe male connector according to claim 2, characterized in that: The outer periphery of the cover is provided with a side plate extending into the installation cavity, the side plate is surrounded to form a cavity in communication with the installation cavity, and the valve core is arranged in the cavity.

4. The fuel pipe male connector for an outboard motor according to claim 1, characterized in that: The first sealing ring is an O-shaped sealing ring, and an outer taper surface for abutting against and sealing the first sealing ring is formed on the end of the valve core.

5. The fuel pipe male connector for an outboard motor according to claim 1, characterized in that: The valve core is uniformly provided with a plurality of oil passing grooves in the circumferential direction.

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