JPH0410400Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a support structure for a fuel pump disposed in a fuel tank of a vehicle, small boat, etc.

[Prior Art] Vehicles, small ships, etc. are equipped with a fuel pump that supplies fuel in a fuel tank to an engine section. Fuel pumps include so-called in-tank fuel pumps that are placed inside the fuel tank (Japanese Utility Model Publication Act, 1973).
No. 8810).

5 and 6 show a fuel pump 1 of this type.
A conventional structure for mounting a 0 into a fuel tank is shown. As shown in Figures 5 and 6,
Conventionally, a cushion rubber 16 is attached to the fuel pump 10.
, and insert this cushion rubber 16 into the notch 1.
2, the fuel pump 10 is supported by the bracket via the cushion rubber 16 by inserting it into the hole 14 from the notch 12 into the bracket 18 having a substantially circular hole 14 communicating with the outside. was.

By the way, when a polymer material such as a rubber material is immersed in a solvent such as fuel, the material absorbs this solvent and increases in volume (swelling). Therefore, when the cushion rubber 16 is fitted and locked into the hole 14 and attached to the bracket 18 as described above, the cushion rubber 16 when fuel is injected into the fuel tank.
It is necessary to take into consideration the swelling of the cushion rubber 16 in the hole 14. Conventionally, the cushion rubber 16 is inserted into the hole 14 during installation so that the cushion rubber 16 fits into the hole 14 due to swelling.
It was configured so that it could be loosely fitted.

However, in the mounting structure of the fuel pump 10, since the hole 14 has a substantially circular shape, when a force is applied to the cushion rubber 16 in the direction in which the cushion rubber 16 comes out of the hole 14 (in the direction of arrow A in FIG. 6). The force generated by this force to reduce the diameter of the cushion rubber 16 in the width direction of the notch becomes relatively large. Therefore, the cushion rubber 16 easily comes out from the hole 14, and especially until the fuel is injected into the fuel tank, the cushion rubber 16
Since it was loosely fitted into the hole 14, there was a risk that the cushion rubber 16 would come out of the hole 14 and the fuel pump 10 would come off, as shown in FIG.

[Problems to be Solved by the Invention] Taking the above facts into consideration, the present invention aims to provide a fuel pump support structure that is easy to assemble and prevents the fuel pump from easily coming off after assembly.

[Means for Solving the Problems] In the fuel pump support structure according to the present invention, an elastic member is engaged with the fuel pump, and the elastic member is attached to a bracket having a hole communicating with the outside through a notch. A fuel pump support structure in which the fuel pump is inserted into a hole through a notch while being deformed, and the fuel pump is supported on a bracket via an elastic member, and the shape of the hole is such that one vertex faces the notch. It is characterized in that it has a substantially triangular shape, and the insertion portion of the elastic member into the hole has a substantially triangular shape that matches the shape of the hole.

[Function] In the fuel pump support structure configured as described above, if the elastic member that has been engaged with the fuel pump in advance is press-fitted into the hole from the notch, the elastic member is fitted and locked in the hole, and thereby the fuel pump is supported by the bracket via an elastic member.

In this state where the fuel pump is supported, the hole has a substantially triangular shape with one vertex facing the notch, and the insertion portion of the elastic member into the hole also has a matching substantially triangular shape, so that the elastic When a force is applied to the member in the direction in which the elastic member comes out of the hole due to some kind of impact, this force generates a force that reduces the diameter of the portion of the elastic member inserted into the hole in the width direction of the notch. It won't grow as big as it used to.

Therefore, even if a force is applied to the elastic member in the direction in which the elastic member comes out of the hole, the elastic member will not greatly contract in diameter in the width direction of the notch and will not easily come out of the hole. , the fuel pump will not come off easily.

[Example] Figs. 1 to 3 show an example of a fuel pump support structure according to the present invention. In this embodiment, the fuel pump 26 is mounted within a fuel tank (not shown) via a bracket 28.

The bracket 28 has a flange portion (not shown) formed at the upper end in FIG. 2, and the flange portion is fixed to the upper surface of the fuel tank (not shown) with screws or the like so as to extend downwardly inside the fuel tank. bracket 28
As shown in FIG. 2, the lower end of the holder is a horizontal portion 30 bent at a substantially right angle.

The horizontal portion 30 of the bracket 28 is provided with a hole 36 that communicates with the outside through a notch 34, as shown in FIG. The cutout portion 34 is the horizontal portion 30
It is provided on the tip side of the horizontal part and gradually widens toward the tip of the horizontal part. The hole 36 is formed in a substantially equilateral triangular shape such that the notch 34 faces one vertex 38, as shown in FIG. That is,
The hole 36 has a substantially equilateral triangular shape with one vertex 38 located on the base side of the horizontal portion 30.
A notch 34 is formed on the tip side of the horizontal portion, which is one side of the inner periphery facing 8.

A cushion rubber 32, which is an elastic member, is attached to the horizontal portion 30 of the bracket 28.

As shown in FIG. 1, the cushion rubber 32 has an insertion portion 40 protruding from the lower surface of FIG. It is locked. The cushion rubber 32 is swollen when fuel is injected into the fuel tank, and the insertion portion 40 is expanded in diameter by this swelling and is tightly fitted into the hole 36. That is, before the fuel is injected into the fuel tank, the insertion part 40 has a cross-sectional shape that is one size smaller than the size of the hole 36, and is loosely fitted into the hole 36. As shown in FIG. 1, an arcuate groove 44 is formed on the upper surface of the cushion rubber 32 in FIG. 2, that is, on the surface opposite to the protruding side of the insertion portion 40.

As shown in FIG. 1, the fuel pump 26 has an arcuate projection 46 formed at its lower end that corresponds to the arcuate groove 44, and this arcuate projection 46 is inserted into the arcuate groove 44 and engaged with the cushion rubber 32. .
One end of a fuel pipe 42 is connected to the upper end of this fuel pump 26 . The other end of the fuel pipe 42 passes through the flange portion (not shown) of the bracket 28 and is connected to the engine section, and is connected to the fuel pump 2.
6 can supply fuel to the engine section through this fuel pipe 42.

Next, the assembly of the fuel pump 26 will be explained.

The fuel pump 26 is attached to the bracket 28 together with the fuel pipe 42 before the bracket 28 is assembled to the fuel tank.
It is assembled into.

This assembly is performed as follows. First, the fuel pipe 42 is passed through the flange portion (not shown) of the bracket 28, and then the fuel pump 26 is connected to the fuel pipe 42. After connecting the fuel pump 26 to the fuel pipe 42, the cushion rubber 32 is engaged with the fuel pump 26, and finally the hole 3 of the bracket 28 is inserted.
By applying pressure to the insertion portion 40 of the cushion rubber 32 through the notch 34 at 6, the fuel pump 26 is assembled to the bracket 28, as shown in FIGS. 2 and 3. That is, when the insertion portion 40 of the cushion rubber 32 is press-fitted into the hole 36 from the notch 34, the insertion portion 40 of the cushion rubber 32 is elastically deformed.
As a result, the insertion portion 40 of the cushion rubber 32 is fitted into the hole 36 and locked.

After assembling the fuel pump 26 and the fuel pipe 42 to the bracket 28, if the bracket 28 is assembled to the fuel tank, the fuel pump 26 will be attached to the bracket 28.
The assembly of the fuel pump 26 is thereby completed.

In this assembled state, the insertion portion 40 of the cushion rubber 32 is loosely fitted into the hole 36 before fuel is injected into the fuel tank, but after the fuel is injected into the fuel tank, the cushion rubber 32 Due to the swelling, the insertion portion 40 of the cushion rubber 32 expands in diameter and is tightly fitted into the hole 36, thereby reliably supporting the fuel pump 26 without wobbling.

Here, if a force is applied to the cushion rubber 32 in the direction in which the cushion rubber 32 comes out of the hole 36 due to some kind of impact (in the direction of arrow B in FIG. Since the insertion part 40 of the cushion rubber 32 is formed in a substantially triangular cross section that matches this hole 36, the insertion part 40 generated by this force is moved in the width direction of the notch. The force for reducing the diameter does not become as large as in the conventional case.

Therefore, before the fuel was injected into the fuel tank, a force was applied to the fuel pump 26 in the direction of the fuel pump 26 coming out of the hole 36 (in the direction of arrow B in FIG. 3) due to some kind of impact. Even in such a case, the cushion rubber 32 will not greatly contract in diameter in the width direction of the notch 34, and the insertion portion 40 will not come out of the hole 36 and the fuel pump 26 will not come off.

In addition, although the hole 36 is formed in a substantially equilateral triangular shape in the above description, it may have another structure such as a substantially triangular shape as shown in FIG.

[Effects of the invention] As explained above, in the fuel pump support structure according to the invention, an elastic member is engaged with the fuel pump, and the elastic member is attached to the bracket having a hole communicating with the outside through a notch. A fuel pump support structure in which the fuel pump is inserted into a hole through a notch while being deformed, and the fuel pump is supported on a bracket via an elastic member, and the shape of the hole is such that one vertex faces the notch. The fuel pump has a substantially triangular shape, and the part where the elastic member is inserted into the hole has a substantially triangular shape that matches the shape of the hole, so assembly is easy and the fuel pump will not easily come off after assembly. Has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the fuel pump support structure according to the present invention, FIG. 2 is a perspective view showing the assembled state of FIG. 1, and FIG. 3 is a view of FIG. 2 from below. FIG. 4 is a bottom view showing another embodiment corresponding to FIG. 3, FIG. 5 is a perspective view showing a conventional fuel pump support structure, and FIG. FIG. 7 is a bottom view seen from the bottom of the figure, and a perspective view corresponding to FIG. 5 showing a state in which the fuel pump of FIG. 5 is removed. 26...Fuel pump, 28...Bracket, 3
2...Cushion rubber, 34...Notch, 36...
...hole, 38...apex, 40...insertion part.

Claims (1)

[Scope of utility model registration request] An elastic member is engaged with the fuel pump, and the elastic member is inserted into the hole from the notch while being elastically deformed into a bracket having a hole that communicates with the outside through a notch, and the fuel pump is attached to the bracket with the elastic member. A fuel pump support structure supported on a bracket via a fuel pump support structure,
The hole has a substantially triangular shape with one vertex facing the notch, and the insertion portion of the elastic member into the hole has a substantially triangular shape that matches the shape of the hole. Fuel pump support structure.