JPH048338Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a mounting device for an oil level gauge for internal combustion engines, etc.

(Prior art) Conventionally, this type of level gauge is equipped with a rubber stopper having an annular protrusion, which is inserted into a circular gauge insertion tube, or as disclosed in Japanese Utility Model Application No. 58-30828. As disclosed,
Contrary to the above conventional structure, an annular groove was formed on the inner surface of the gauge insertion tube, and the elastic plug part of the level gauge was inserted and reduced in diameter, so that a part of the groove was engaged with the annular groove. For this reason, the former engages with the protruding part of the level gauge and the gauge insertion tube by frictional pressure welding force, while the latter has an annular groove formed on the gauge insertion tube side, but the level gauge side is Since it is a simple elastic stopper, most of the elastic stopper of the level gauge is in friction pressure contact with the flat inner wall surface of the gauge insertion tube, and only a portion thereof is engaged in the annular groove. Therefore, when the gauge insertion tube vibrates due to engine vibration, these items are shaken greatly by the centrifugal force due to the weight of the level gauge handle and the rubber stopper or elastic stopper, and also generate slight vibrations before coming out. There was a risk that the rubber would gradually slip out due to the elastic fatigue caused by the aging of the rubber due to the high temperature of the engine and the reduction in frictional force due to the adhesion of oil.

(Problems that the invention attempts to solve) Therefore, in view of the above conventional problems, this invention
This was developed to solve this problem, and the aim is to provide a mounting device with a simple structure, which allows a level gauge to be easily inserted and which does not come off due to engine vibrations and high temperatures.

(Means for solving the problem) As a means to achieve this, this invention has an annular bulge with an arcuate cross section at the proximal end of the level gauge and a tapered shape with a slightly larger diameter toward the distal end. A plurality of annular serrations are arranged in parallel, and an elastic sleeve is attached to the opening between the gauge inserts into which the level gauge is inserted and removed, and an annular bulge having an arcuate cross section of the level gauge is attached to the inner surface of the sleeve. The body is formed with an annular groove that engages with a plurality of annular serrations.

(Example) An example of a specific configuration of this invention shown in the drawings will be described in detail below.

Reference numeral 1 denotes a level gauge main body, in which a handle part 3 is integrally connected to the base end of a gauge part 2, and a stopper 4 is attached to the base end. This stopper 4 is made of relatively hard rubber or plastic and has a large-diameter flange 5 and a cylindrical fitting part 6. Two steps of tapered annular sawteeth 8 facing toward the side and becoming slightly larger in diameter are formed. Reference numeral 9 denotes a gauge insertion tube, and its open end is fitted over the inner and outer walls so as to cover the end of a sleeve 10 made of hard rubber. At this time, a rough surface is formed on the inner surface of the gauge insertion tube 9 to increase the frictional force, or it is bonded with a mounting agent.
Or firmly fixed by baking or other means. Further, on the inner wall surface of the sleeve 10, an annular groove 1 having a smaller diameter than the arc of the annular bulge 7 is formed on the open end side.
1, and an annular square groove 12 having a rectangular cross section is formed on the inner side thereof.

With this configuration, the gauge insertion tube 9
When the gauge part 2 of the level gauge main body 1 is inserted into, the fitting part 6 of the stopper 4 at the base of the gauge part 2
is inserted into the sleeve 10. At this time, the annular sawtooth 8 formed on the fitting part 6 slightly expands the sleeve 10 due to its small protrusion and tapered shape, and is smoothly and shallowly fitted into the annular square groove 12. Further, the annular bulge 7 enters the sleeve 10 while expanding it against the elasticity of the sleeve 10, and further expands the small-diameter arcuate annular groove 11 to closely fit with the annular bulge 7. The level gauge body 1 can be reliably fitted and inserted into the gauge insertion tube 9.

Then, centrifugal force due to vibration acts on the gauge insertion tube 9 and the level gauge main body 1 due to the driving of the engine, etc., and the level gauge main body 1 tries to come out, but in this case, the annular bulging body 7 In order to press the arcuate side of the annular groove 11 of the sleeve 10, a pushing force acts on the arcuate side of the groove 11 due to its elasticity, causing the arcuate surface of the annular bulge 7 to press against the arcuate surface of the annular groove 11. The level gauge body 1 is pushed back so that it is automatically aligned to the center position of the level gauge body 1, thereby preventing the level gauge body 1 from slipping out. At the same time, the annular sawtooth 8 is also deeply engaged with one side of the annular square groove 12 of the sleeve 10 due to vibration, so that the level gauge main body 1 can be removed more reliably.

When the level gauge body 1 is pulled out for oil inspection or the like, the annular bulge 7 presses and expands the inner wall surface of the sleeve 10 to separate from the annular groove 11, and the annular sawtooth 8 engages with the annular square groove 12. Since the amount of engagement is small, it can be easily pulled out without receiving a large resistance force.

(Effects of the invention) As described above in detail with respect to the embodiment, this invention is achieved by the engagement between the annular bulge formed on the stopper of the level gauge body and the annular groove of the sleeve attached to the gauge insertion tube by the arc surface. Even when external forces such as vibrations are applied, the automatic alignment action works, and the engagement action with the annular square groove by the annular serrations is also added, making it possible to reliably maintain the inserted state without coming out unnecessarily. In addition, when inserting and removing the level gauge body, the annular bulge is engaged with the annular groove near the end of the gauge insertion tube, so it can be inserted and removed smoothly without experiencing the elastic resistance of the sleeve for a long time. It is. Furthermore, since the inner and outer walls of the open end of the gauge insertion tube are covered with a sleeve, it is protected from high temperatures from the outside such as the engine, preventing elastic fatigue due to heat at the level gauge insertion part, and the level gauge body is covered with a sleeve. Therefore, since it does not come into direct contact with the gauge insertion tube, damage to the stopper is prevented, and it has various excellent effects such as being able to be used for a long period of time.

[Brief explanation of the drawing]

Figure 1 is a vertical side view of the gauge insertion tube of this invention, Figure 2 is a vertical side view of the level gauge body, and Figure 3 is a vertical side view of the level gauge body inserted into the gauge insertion tube. show. 1... Level gauge body, 2... Gauge part, 4
... Stopper, 6 ... Fitting part, 7 ... Annular bulge, 8 ... Annular serration, 9 ... Gauge insertion tube, 10
... Sleeve, 11 ... Annular groove, 12 ... Annular square groove.

Claims (1)

[Scope of utility model registration request] At the proximal end of the level gauge, an annular bulge with an arcuate cross section for locking is formed, and a plurality of tapered annular serrations with a slightly larger diameter facing the distal end are arranged in parallel. An elastic sleeve is attached to the opening of the gauge insertion tube through which the gauge is inserted and removed, and the inner surface of the sleeve is provided with a plurality of annular grooves having an arcuate cross section and engaging with the annular bulge and the annular serrations of the level gauge. Mounting device for level gauge formed by molding.