CN112977050A

CN112977050A - Connecting structure and connecting method for blow molding oil filling pipe and lock cover-free system

Info

Publication number: CN112977050A
Application number: CN202110220799.5A
Authority: CN
Inventors: 姜林; 高德俊; 吕昊; 杨杰; 关莹; 严玲; 姚玉建
Original assignee: Yapp Automotive Parts Co Ltd
Current assignee: Yapp Automotive Parts Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-06-18
Anticipated expiration: 2041-02-26
Also published as: CN112977050B

Abstract

The invention relates to a connecting structure and a connecting method of a blow molding oil filling pipe and a system without a lock cover, and the connecting structure comprises an adapter, wherein the adapter is cylindrical, the outer wall of the adapter is provided with a continuous annular welding structure for connecting the blow molding oil filling pipe, and the system without the lock cover is arranged in the adapter; the head of the cover locking-free system is provided with a cover, and the periphery of the cover is provided with an elastic buckle used for limiting the cover locking-free system inside the adapter. The adapter provided by the technical scheme can be matched with various types of systems without lock covers, is not limited by the structure of the systems without lock covers, and is simple to design and manufacture; the plastic adapter is directly welded and formed integrally in the blow molding process of the oil filling pipe, so that the generation of fuel evaporation emission can be effectively reduced, the sealing performance is good, and the safety is high; the process of installing the system without the locking cover is simple, and no additional welding process or large-scale mechanical investment is needed.

Description

Connecting structure and connecting method for blow molding oil filling pipe and lock cover-free system

Technical Field

The invention belongs to the technical field of fuel tank accessories, and particularly relates to a connecting structure and a connecting method of a blow molding filling pipe and a system without a lock cover.

Background

At present, the fuel filling pipe system of the domestic motor vehicle mainly comprises a fuel filling pipe and a fuel filling cover, the fuel filling cover needs to be unscrewed firstly during fuel filling, time and labor are wasted, and safety problems that the fuel filling cover is not screwed down, the fuel filling cover is lost or damaged and the like often exist. Meanwhile, with the implementation of the national six-emission standard of the motor vehicle, the fuel evaporation emission requirement of the motor vehicle during refueling is strictly limited. In order to prevent air pollution and solve a series of problems caused by using a lock cover structure, a lock cover-free system is produced. The cover locking-free system uses an integrated baffle plate structure to replace the traditional oil filling cover, provides more convenience for self-service oil filling of a driver, and has higher safety.

The structure that the system integration of lock cover has been used widely in metal filler pipe, because the metal filler pipe inner wall is smooth, and the uniformity is good, the system of lock cover can be directly through the sealing washer that inlays in the outside with the inside pressure seal of metal filler pipe, the head uses the metal lock to support fixed connection. The blow molding oil filling pipe has the advantages of light weight, low manufacturing cost, capability of meeting personalized design and the like, and occupies more and more shares in the motor vehicle market, but due to the limitation of process characteristics, the smoothness of the inner wall of the pipe cannot meet the requirement of directly sealing the non-lock cover system through a sealing ring, and the problem also becomes a technical barrier that the non-lock cover system cannot be widely popularized on the blow molding oil filling pipe.

Disclosure of Invention

The invention aims to provide a connecting structure and a connecting method of a blow-molding oil filling pipe and a lock-cover-free system, and aims to solve the problem that the sealing property between the lock-cover-free system and the blow-molding oil filling pipe is poor in the prior art.

The invention is realized by the following technical scheme:

a connecting structure of a blow molding oil filling pipe and a lock-cover-free system comprises an adapter, wherein the adapter is cylindrical, a continuous annular welding structure is arranged on the outer wall of the adapter and used for connecting the blow molding oil filling pipe, and the lock-cover-free system is arranged in the adapter;

the head of the cover locking-free system is provided with a cover, and the periphery of the cover is provided with an elastic buckle used for limiting the cover locking-free system inside the adapter.

Preferably, the internal channel of the adapter is wide at the top and narrow at the bottom, and the inner diameter of the internal channel is matched with the outer diameter of the system without the locking cover.

Preferably, the upper end surface of the adapter is provided with a first protruding structure; and second protruding structures are arranged on the side wall of the adapter and distributed along the axial direction of the adapter.

Preferably, a limiting groove is formed in the lock-cover-free system, is matched with the first protruding structure, and is used for limiting and preventing the lock-cover-free system and the adapter from being mounted in a wrong way.

Preferably, be provided with the mistake proofing recess on the housing, the mistake proofing recess with the cooperation of second protruding structure, guide housing top-down installation.

Preferably, the upper end face of the adapter extends outwards in the radial direction to form a circle of extension part, and the extension part and the elastic buckle form an inverted connection to limit the non-locking cover system in the adapter.

Preferably, an annular sealing ring is arranged on the outer side wall of the lockless cover system.

Preferably, the material of the adapter includes, but is not limited to, polyethylene.

Preferably, the material of the cover is a metal material.

A method of connecting a blow molded filler tube to a lockless cap system utilizing the connecting structure of any of the above described blow molded filler tubes to lockless cap systems, comprising the steps of:

s1, in the blow molding process of the oil filling pipe, the adapter is arranged inside the oil filling pipe orifice, built-in welding is carried out through a continuous annular welding structure arranged on the outer wall of the adapter, and the inner wall of the oil filling pipe is connected with the outer wall of the adapter;

s2, pushing the system without the lock cover into the adapter;

and S3, pressing the cover into the adapter from the top of the lockless cover system to complete the connection of the blow-molded oil filling pipe and the lockless cover system.

The invention has the beneficial effects that:

1. the adapter provided by the technical scheme of the invention can be matched with various types of systems without lock covers, is not limited by the structure of the systems without lock covers, and is simple to design and manufacture.

2. Compared with the existing plastic oil filling pipe system structure without the lock cover, the plastic adapter provided by the scheme of the invention is directly welded and formed integrally in the blow molding process of the oil filling pipe, so that the generation of fuel evaporation emission can be effectively reduced, and the plastic oil filling pipe system structure is good in sealing performance and high in safety.

3. The process of installing the system without the locking cover is simple, and no additional welding process or large-scale mechanical investment is needed.

Drawings

FIG. 1 is a schematic view of the overall construction of a lock-less cap system and a blow molded filler tube connection;

FIG. 2 is a schematic diagram of an adapter construction;

FIG. 3 is an axial cross-sectional view of the adapter;

FIG. 4 is a schematic structural view of a head of a blow-molded refueling pipe;

FIG. 5 is a partial cross-sectional view of a blow molded filler tube head;

FIG. 6 is a schematic view of a system without a locking cover;

FIG. 7 is a schematic view of a cover structure;

fig. 8 is a cross-sectional view of the cover.

Description of the reference numerals

1: an adapter; 2: blowing an oil filling pipe; 3: a lock cover free system; 4: a cover; 5: a seal ring;

a continuous annular welded structure; 12: a first bump structure; 13, an extension part; 14, a second bump structure; 21, blowing the oil filling pipe body; 22, the head of the oil filling pipe; 31, a limiting groove; 41, elastic buckle; and 42, error-proof grooves.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limiting the present invention, and furthermore, the terms "first", "second", and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the present application provides a connection structure for a blow molded filler tube and a lockless cap system, comprising an adapter 1 for connecting a lockless cap system 3 and a blow molded filler tube 2. In this embodiment, the adaptor is made of polyethylene, and in other embodiments of the present application, the adaptor may be made of other materials suitable for manufacturing the adaptor.

As shown in fig. 2 and 3, the adapter 1 is integrally cylindrical, and a continuous annular welding structure 11 is arranged on the outer wall of the adapter and used for connecting a blow-molded oil filling pipe. The internal channel of the adapter is wide at the top and narrow at the bottom, namely the size of the upper port part is larger than that of the lower port part, and the inner cavity of the adapter is adapted to the outer diameter of the system without the lock cover.

A first protruding structure 12 is arranged on the upper end face of the adapter; second raised structures 14 are provided on the side walls of the adapter, said second raised structures being distributed in the axial direction of the adapter. A ring of extensions 13 is formed extending radially outwardly from the upper end surface of the adapter. Wherein the second projection structure is disposed on the sidewall between the continuous annular weld structure and the extension portion.

As shown in FIGS. 4 and 5, the blow-molded fuel filler tube includes a blow-molded fuel filler tube body 21 and a fuel filler tube head 22, wherein the adapter is disposed in the fuel filler tube head.

As shown in fig. 6, which is a schematic structural diagram of a non-locking cover system, the non-locking cover system 3 of the present application is of a conventional structure, and will not be described in detail herein, and two annular sealing rings 5 are provided on the outer wall of the non-locking cover system. A limiting groove 31 is formed in the cover-free system and matched with the first protruding structure, the cover-free system can be inserted into the adapter from top to bottom, and limiting and error proofing of the cover-free system and the adapter are achieved.

As shown in fig. 7 and 8, a metal cover 4 is disposed on the cover locking-free system 3, four elastic buckles 41 are disposed on the side walls of the cover in pairwise symmetry, and after the cover is mounted, barbs inside the elastic buckles are matched with the extending portions to form an inverted connection, so that the cover locking-free system body is limited inside the adapter.

And a mistake-proofing groove 42 is formed in the side wall of the cover and is matched with the second protruding structure, so that the cover is guided to be installed from top to bottom.

The application also provides a method for connecting the blow molding oil filling pipe and the system without the lock cover, which is mainly realized through the connecting structure, the adapter is arranged in the head part of the oil filling pipe in the blow molding process of the oil filling pipe, and the continuous annular welding structure on the outer wall of the adapter is melted by high temperature to carry out built-in welding, so that the oil filling pipe body is firmly connected with the adapter; then, pushing the system without the lock cover into the adapter, and compressing a sealing ring on the outer wall of the system without the lock cover to realize the sealing connection between the system without the lock cover and the adapter; and finally, pressing the metal cover into the adapter from the top of the non-lock cover system to complete the connection of the blow-molded oil filling pipe and the non-lock cover system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A connecting structure of a blow molding oil filling pipe and a lock cover-free system is characterized by comprising an adapter, wherein the adapter is cylindrical, a continuous annular welding structure is arranged on the outer wall of the adapter and used for connecting the blow molding oil filling pipe, and the lock cover-free system is arranged in the adapter;

2. The connecting structure for a blow molded filler tube and a lockless cap system as claimed in claim 1, wherein said adapter has an internal passageway that is wide at the top and narrow at the bottom, and an internal diameter that matches the external diameter of the lockless cap system.

3. The connecting structure for a blow molded filler tube and lockless cap system of claim 1 wherein the upper end surface of the adapter is provided with a first raised formation; and second protruding structures are arranged on the side wall of the adapter and distributed along the axial direction of the adapter.

4. The connecting structure for a blow molded filler tube and a lockless cap system as claimed in claim 3, wherein a retaining groove is provided on said lockless cap system for cooperating with said first protrusion structure for preventing the error of the mounting of the lockless cap system with the adapter.

5. The connecting structure for a blow molded filler tube and lockless lid system as claimed in claim 3, wherein an error-proofing groove is provided on said lid, said error-proofing groove cooperating with said second protrusion structure to guide the lid to be installed from top to bottom.

6. The connecting structure for a blow molded filler tube and lockless cap system of claim 1 wherein said adapter upper end surface extends radially outwardly to form a ring of extension that forms a back-off connection with said resilient snap to confine the lockless cap system within the adapter.

7. The connecting structure for a blow molded filler tube and a lockless cap system as claimed in claim 1, wherein an annular sealing ring is provided on the outer sidewall of the lockless cap system.

8. The connecting structure for a blow molded filler tube and lockless cap system of claim 1, wherein the material of the adapter includes, but is not limited to, polyethylene.

9. The connecting structure for a blow molded filler tube and lockless lid system of claim 1, wherein the material of the lid cover is a metallic material.

10. A method of connecting a blow molded filler tube to a lock cap free system utilizing the connection of a blow molded filler tube to a lock cap free system of any one of claims 1 to 9, comprising the steps of:

s2, pushing the system without the lock cover into the adapter;