CN214189299U - Leakage hole mounting mechanism - Google Patents
Leakage hole mounting mechanism Download PDFInfo
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- CN214189299U CN214189299U CN202022531478.0U CN202022531478U CN214189299U CN 214189299 U CN214189299 U CN 214189299U CN 202022531478 U CN202022531478 U CN 202022531478U CN 214189299 U CN214189299 U CN 214189299U
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- threaded rod
- leakage hole
- fastening nut
- mounting mechanism
- leakage
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Abstract
The utility model provides a let out leakage hole installation mechanism for install standard and let out leakage hole in the fuel tank of oil-free case lid, wherein, let out leakage hole installation mechanism and have threaded rod, fastening nut and elastic plug, the threaded rod structure is opened the hollow threaded rod that has the trompil for both ends have the backstop portion that can follow threaded rod axial direction and carry out the backstop on the threaded rod, the elastic plug cup joints backstop is in on the threaded rod backstop portion department, fastening nut and threaded rod screw-thread fit can extrude to backstop portion direction thereby the oil filler hole of elastic plug so that the radial expansion of elastic plug seals fuel tank.
Description
Technical Field
The utility model relates to a let out leakage hole installation mechanism, especially relate to a let out leakage hole installation mechanism that is arranged in installing standard leakage hole in the automobile fuel tank of oilless case lid.
Background
With the rapid development of the automobile industry, the number of motor vehicles and drivers in China is rapidly increased. The rapid increase of the automobile holding capacity brings huge pressure to energy and environment in China. In 2016, 12, 23 days, the ministry of environmental protection, combined with the State administration of quality supervision, inspection and quarantine, released the emission limit and measurement method of light vehicle pollutants in the sixth stage of China (hereinafter referred to as "nation six"). The On-Board Diagnostics (OBD) system is specifically specified by the sixth nation to monitor the desorption flow rate of the evaporative emissions system and monitor the integrity of the entire evaporative emission system except for the lines and connections between the canister valve and the intake manifold to prevent fuel vapor leakage to the atmosphere. The OBD system needs to diagnose the leakage amount generated by a small hole with the diameter being more than or equal to 1mm (manufacturers can replace the small hole with the diameter being 0.5 mm) in the system, and requires that leakage holes are arranged near a fuel oil filling pipe and at a carbon tank desorption pipeline for function demonstration. The requirement of the national six regulations on the new function of the OBD brings great challenges to the development of the corresponding diagnosis calibration, wherein how to introduce a leakage fault of 1mm (or 0.5 mm) into the evaporation system is the first problem to be solved for the development of the leakage diagnosis calibration. For fuel evaporative venting systems equipped with fuel tank caps, the original fuel tank cap can be easily retrofitted to introduce 1mm of leakage. However, at present, more and more fuel tanks of luxury vehicle models are not provided with fuel tank covers, but the fuel filling port is sealed by a spring piece, and when fuel is filled, the fuel filling cover does not need to be unscrewed, and a fuel gun can directly poke open the spring piece. With such a fuel evaporative emissions system without a fuel cap, it is difficult to install a standard leak hole directly at the filler opening.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a technical problem that an aspect will be solved is how to introduce the standard leakage hole in the fuel evaporative emission system of no fuel tank cap.
Furthermore, other aspects of the present invention are also directed to solving or alleviating other technical problems in the prior art.
The utility model provides a let out leakage hole installation mechanism particularly, according to the utility model discloses an aspect provides:
the utility model provides a let out leakage hole installation mechanism for install the standard and let out the leakage hole in the automobile fuel tank of no tank lid, wherein, let out leakage hole installation mechanism and have threaded rod, fastening nut and elastic plug, the threaded rod structure is opened the cavity threaded rod that has the trompil for both ends have on the threaded rod can follow threaded rod axial direction and carry out the backstop portion of backstop, the elastic plug cup joints on the threaded rod and backstop portion department, thereby fastening nut and threaded rod screw-thread fit can extrude to backstop portion direction the oil filler hole of elastic plug so that the radial expansion of elastic plug seals automobile fuel tank.
Optionally, according to an embodiment of the invention, the stop is configured as a circular ring-shaped protrusion protruding in a radial direction of the threaded rod.
Optionally, according to an embodiment of the invention, the stop is configured as a shoulder.
Optionally, according to an embodiment of the present invention, a gasket is installed between the fastening nut and the elastic plug.
Optionally, according to an embodiment of the present invention, the gasket is integrally formed with the fastening nut.
Optionally, according to an embodiment of the present invention, a screwing handle is mounted on the fastening nut for facilitating screwing the fastening nut when mounting.
Alternatively, according to an embodiment of the invention, the threaded rod is close to one end of the fastening nut is configured with a shoulder so that the diameter of this end is smaller than the diameter of the other part of the threaded rod on which a leakage hole adapter piece is mounted, one end of which is configured with a standard leakage hole, for limiting the size of the leakage hole.
Optionally, according to an embodiment of the invention, the leakage bore adapter is configured with an internal thread and is screwed with the threaded rod.
Alternatively, according to an embodiment of the invention, the elastic plug is configured as a plug having a circular ring-shaped cross section and a trapezoidal longitudinal section.
Optionally, according to an embodiment of the present invention, the elastic plug is a rubber plug.
The utility model discloses an useful part includes:
1. the leakage hole mounting mechanism of the utility model can adapt to oil filling ports with various apertures and meet the requirement of sealing performance,
2. according to the utility model discloses a let out leakage hole installation mechanism and can install the standard of various aperture specifications and let out leakage hole.
Drawings
The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,
fig. 1 shows a schematic view of a leakage hole mounting mechanism according to an embodiment of the present invention,
figure 2 shows a threaded rod schematic of a leakage hole mounting mechanism according to one embodiment of the present invention,
fig. 3 shows a longitudinal section and a schematic cross-sectional view of a rubber plug of a leakage hole mounting mechanism according to an embodiment of the present invention.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a person skilled in the art can propose various alternative structural modes and implementation modes without changing the essential spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and descriptive purposes only and not for purposes of indication or implication as to the relative importance of the respective components.
Referring to fig. 1, a schematic diagram of a leakage hole mounting mechanism is shown according to an embodiment of the present invention. The leakage hole mounting mechanism is used for mounting a standard leakage hole in an automobile oil tank without an oil tank cover. The leakage hole mounting mechanism comprises a threaded rod 1, a fastening nut 2 and an elastic plug 3. Referring to fig. 2, a threaded rod schematic of a leakage hole mounting mechanism is shown according to one embodiment of the present invention. The threaded rod 1 is a hollow threaded rod with openings at both ends. In the embodiment according to fig. 1, the threaded rod 1 has a stop which can be stopped in the axial direction of the threaded rod, in particular here an annular projection which projects in the radial direction of the threaded rod, and which can also be designed as a shoulder or as a flange. Elastic plug 3 cup joints threaded rod 1 is gone up and the backstop is in backstop portion department, elastic plug 3 can be the rubber buffer. The fastening nut 2 is in threaded connection with the threaded rod 1 and can press the elastic plug 3 towards the direction of the stopping part so as to enable the elastic plug 3 to expand radially and seal a fuel filling opening of an automobile fuel tank. When the fastening nut 2 exerts a force on the elastic plug 3, the elastic plug 3 expands and deforms. The expansion degree of the elastic plug 3 can be adjusted by the up-and-down movement of the fastening nut 2 on the threaded rod 1, so that the oil filling openings with different apertures can be adapted. A washer 4 is mounted between the fastening nut 2 and the elastic plug 3 for distributing the force of the fastening nut 2 pressing the elastic plug 3 more evenly over the elastic plug 3. The washer 4 can also be formed integrally with the fastening nut 2. In fig. 1, screw knobs 5 are further mounted on both sides of the fastening nut 2 for facilitating the screwing of the fastening nut 2 when mounted, said screw knobs 5 can be two in number, configured as metal sheets protruding to both sides of the fastening nut 2.
In the embodiment according to fig. 2, a shoulder is formed at the end of the threaded rod 1 close to the fastening nut 2, so that the diameter of this end is smaller than the diameter of the rest of the threaded rod 1. A leakage bore adapter 6, which is designed with a standard leakage bore at one end, is attached to this end in order to limit the size of the leakage bore. The leakage bore adapter 6 is in the form of a hexagonal nut, the interior of which is provided with an internal thread. The end of the leakage bore adapter 6 remote from the fastening nut 2 is formed closed, except for a standard leakage bore. The end of the leakage bore adapter 6 can be provided with leakage bores of different sizes.
Referring to fig. 3, it shows a longitudinal section and a schematic cross-sectional view of a rubber plug 3 of a leakage hole mounting mechanism according to an embodiment of the present invention. The cross section of the rubber plug 3 is configured into a ring shape, wherein the inner opening of the ring structure is larger than the diameter of the threaded rod 1 so as to be sleeved on the threaded rod 1. The longitudinal section of the rubber plug 3 is in the shape of an isosceles trapezoid, and the short side of the trapezoid stops at the stopping part.
When a 1mm bore diameter leakage fault is introduced near the fuel filler opening for a vehicle equipped with a tank-lid-free vaporization system, the leakage hole mounting mechanism is first assembled as shown in fig. 1, and the fastening nut 2 is screwed to a higher position so that the rubber plug 3 maintains its natural form. Then a long rod at the bottom of the leakage hole mounting mechanism is used for poking a spring piece at the oil filling port and inserting the spring piece until the rubber plug 3 completely enters the oil filling port. At the moment, the fastening nut 2 is rotated clockwise, so that the nut 2 transmits force to the rubber plug 3 through the gasket 4, and the rubber plug 3 generates radial expansion deformation and is tightly attached to the wall surface of the oil filling port. When it is difficult to continue the rotation of the fastening nut 2, the rubber stopper 3 has already sufficiently sealed the oil filler opening. Finally, a standard 1mm leak hole is installed at the top of the threaded rod 1, and a leak failure of 1mm hole diameter has been introduced into the entire fuel evaporation system at the fuel filler opening.
According to the utility model discloses a let out leakage hole installation mechanism on the one hand and be equipped with deformable rubber, can satisfy the sealed of different aperture oil filler mouths, on the other hand provides the interface that satisfies various specification let out leakage hole, can conveniently introduce the leakage fault in different apertures to fuel evaporation system and mark the development and carry out the OBD function demonstration to the national department of being responsible for with being used for the evaporation system leakage diagnosis.
It should be understood that all of the above preferred embodiments are exemplary and not restrictive, and that various modifications and changes in the specific embodiments described above, which may occur to those skilled in the art upon reading the teachings of the present invention, are intended to be within the scope of the appended claims.
Claims (10)
1. The utility model provides a let out leakage hole installation mechanism for install the standard and let out leakage hole in the automobile fuel tank of oilless case lid, a serial communication port, let out leakage hole installation mechanism and have threaded rod, fastening nut and elastic plug, the threaded rod structure is opened the cavity threaded rod that has the trompil for both ends have on the threaded rod can follow threaded rod axial direction and carry out the backstop portion of backstop, the elastic plug cup joints on the threaded rod and backstop are in backstop portion department, fastening nut and threaded rod screw-thread fit can extrude to backstop portion direction the elastic plug is so that the oil filler hole of the sealed automobile fuel tank of elastic plug radial expansion.
2. The leakage hole mounting mechanism of claim 1, wherein the stop is configured as an annular protrusion that protrudes in a radial direction of the threaded rod.
3. The leakage hole mounting mechanism of claim 1, wherein the stop is configured as a shoulder.
4. The leakage hole mounting mechanism of claim 1, wherein a gasket is mounted between the fastening nut and the elastomeric plug.
5. The leakage hole mounting mechanism of claim 4, wherein the washer is integrally formed with the fastening nut.
6. The leakage hole mounting mechanism of claim 1, wherein a twist grip is mounted on the fastening nut for facilitating twisting of the fastening nut during installation.
7. The leakage hole mounting mechanism of claim 1, wherein a shoulder is formed on an end of the threaded rod adjacent to the fastening nut such that the diameter of the end is smaller than the diameter of the rest of the threaded rod, and a leakage hole adapter having a standard leakage hole formed at one end is mounted on the end to limit the size of the leakage hole.
8. The leakage bore mounting mechanism of claim 7, wherein the leakage bore adapter is internally threaded and threadedly coupled to the threaded rod.
9. The leakage bore mounting mechanism of any one of claims 1 to 8, wherein the elastomeric plug is configured as a plug having a circular cross-section and a trapezoidal longitudinal cross-section.
10. The leakage hole mounting mechanism of any one of claims 1 to 8, wherein the elastomeric plug is a rubber plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022531478.0U CN214189299U (en) | 2020-11-05 | 2020-11-05 | Leakage hole mounting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022531478.0U CN214189299U (en) | 2020-11-05 | 2020-11-05 | Leakage hole mounting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214189299U true CN214189299U (en) | 2021-09-14 |
Family
ID=77644375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022531478.0U Active CN214189299U (en) | 2020-11-05 | 2020-11-05 | Leakage hole mounting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214189299U (en) |
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2020
- 2020-11-05 CN CN202022531478.0U patent/CN214189299U/en active Active
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