JPH0413410Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a fuel pump, and a float is provided at the tip of the side of the sub-tank in which the fuel pump is installed inside, and the length is such that it can rotate to the bottom surface of the sub-tank. A level sensor body with an arm is provided,
When the sub-tank is inserted into the fuel tank and assembled, the arm with the float can be easily inserted through the opening of the fuel tank.

(Prior art) A level sensor body is provided on the side of a sub-tank fitted with a fuel pump inserted through an opening at the top of the fuel tank, which indicates the current amount of fuel liquid to the outside of the fuel tank by the floating rotational position of an arm with a float. This is already being done. The most advanced device, as shown in Fig. 5, is provided with a level sensor main body b on the side of a sub-tank a in which a fuel pump (not shown) is installed, and the level sensor main body b is rotatably contacted with a variable resistance of the main body b. Arm c protruding from the rotor
The structure is such that the float d provided in the tank is almost in contact with the side surface of the sub-tank a. However, in this configuration, as shown in FIG. 5, when inserting the sub-tank a into the fuel tank e through the upper opening f, the inner diameter of the opening f must be increased. However, since the inner diameter of the opening cannot be increased unnecessarily, this cannot be implemented, and some kind of solution is needed.

(Problem to be solved by the invention/purpose of the invention) In the structure outlined above, the closer the float d is to the center of the fuel tank e, the more the level sensor body b
can improve display accuracy. For this reason, arm c
In view of these circumstances, the present invention is designed to have a length that allows the float d to rotate on the bottom surface of the sub-tank a, and a spring is applied only to the arm c to hold it at the lowest fuel level indicating position. From the lowest level indication position, it is configured to rotate due to buoyancy, which improves the accuracy of liquid level display, and
The purpose of this invention is to simplify the insertion of sub-tank a into fuel tank e.

(Means for Solving Problems) The present invention has been made to meet the above-mentioned purpose, and a float is provided at the tip of the sub-tank on the side of the sub-tank to which the fuel pump is attached, which is inserted into the fuel tank from the opening at the top. A tank fuel level sensor body is fixed, which is equipped with an arm that is long enough to rotate to the bottom surface, and a spring is applied to the arm to hold it at the lower limit level indicating position. The arm rotates due to buoyancy to display changes in the fuel level on the outside of the fuel tank, and the arm rotates against the spring elasticity so that the float becomes the lower surface of the sub-tank, thereby providing a force that resists the spring elasticity. The present invention relates to a fuel pump unit characterized in that upon removal of the arm, the arm returns to the lower limit level indicating position.

A preferred embodiment of the invention will now be described.

(Embodiment) Figures 1 to 4 of the attached drawings show an embodiment of the present invention, with Figure 1 being a partially longitudinal side view showing the insertion and assembly of the sub-tank into the fuel tank, and Figure 2 showing the insertion and assembly of the sub-tank into the fuel tank. FIG. 3 is a side view of the case of the level sensor body, and FIG. 4 is a front view thereof.

In the figure, 1 is a fuel tank, and an opening 2 is provided at a position offset to one side from the center of the upper part.

Reference numeral 3 is a set plate provided to seal the opening 2, and a sub-tank 4 with a fuel pump (not shown) installed inside is attached to the bottom surface, and a level sensor is mounted on the outer surface of the sub-tank 4 to prevent movement such as rotation. Attach case 6 of main body 5. The level sensor main body 5 is provided with a rotating element 7 that rotates in contact with a variable resistor placed inside a case 6, or a rotating element 7 that sends out a potential signal that is converted depending on the angle of rotation, and is connected to these elements 7 to A rotating arm 8 is provided to change the angle of the element 7. The arm 8
As shown in FIG. 2, the float 10 attached to the tip is long enough to be rotated to the bottom surface of the sub-tank 4, and a U-shaped or other spring-hung bend is placed near the rotating base of the rotating arm 8 to approach the surface of the case 6. 9 as 3rd, 4th
Form as shown in the figure, and case 6 has rotating arm 8.
An upper limit pin 11 that determines the rotation range of the arm 8 is provided at a position where it collides with the arm 8. Reference numeral 13 denotes a spring whose one end is fixed to the case 6, and the coil portion 14 is loosely wound around the rotating element 7, and applied to the spring hook bend 9 from the direction of bringing the arm 8 closer to the upper limit pin 11. A lower limit pin 12 is provided on the side of the arm 8 to engage with the spring 13 and push the arm 8 to the lower limit angle.

After the sub-tank 4 is installed inside the fuel tank 1, the float 10 is arranged so as to be located in the central part where the change in fuel depth is minimal even if the fuel tank 1 is tilted, as shown in FIG.

(Function) The present invention connects the sub-tank 4 to the opening 2 of the fuel tank 1.
When inserting the rotary arm 8 into the inside from the spring 1
3, and rotates from the lower limit position in a direction away from the upper limit pin 11 (counterclockwise in FIG. 2),
After the float 10 is placed below the sub-tank 4, the insertion shown in FIG. 2 is performed. Also, during the insertion, the lower part of the sub-tank 4 is connected to the rotating arm 8 and the float 10.
When the rotating arm 8 is released from rotating against the elastic force of the spring 13, the spring 13 pushes the rotating arm 8 and moves, and the lower limit pin 12
engage with. When fuel tank 1 is filled with fuel,
The float 8 rises to the level of the fuel level and sends out a signal indicating the current level of fuel in the fuel tank 1 in a known manner.

(Effects) This invention has a fuel pump that is inserted into the fuel tank from the opening at the top of the tank, on the side of the subtank.
A tank fuel level sensor body is fixed, which is equipped with an arm having a length that allows it to rotate to the bottom of the sub-tank with a float at the tip, and a spring is applied to the arm to hold it at the lower limit level indicating position. From the lower limit level indicating position, the arm rotates due to buoyancy to display changes in the tank fuel level externally, and the case 6 of the level sensor main body 5 is fixed to the outside of the sub-tank 4. The rotating arm 8 of the main body 5 is moved to the lower limit position by the spring 13, and the float 10 can be rotated to the lower surface of the sub-tank 4 against the elasticity of the spring 13, so that the diameter of the opening 2 is If it has a diameter large enough to allow the sub-tank 4 to pass through it vertically, the level sensor main body 5 can be fitted and assembled into the fuel tank 1 together with the sub-tank 4.

[Brief explanation of the drawing]

Figures 1 to 4 of the accompanying drawings show one embodiment of the present invention, with Figure 1 being a partially longitudinal side view showing the insertion and assembly of the sub-tank into the fuel tank, and Figure 2 showing the insertion and assembly of the sub-tank into the fuel tank. FIG. 3 is a side view of the case of the level sensor body, and FIG. 4 is a front view thereof. FIG. 5 is a side view showing the relationship between a conventional structure and a fuel tank. DESCRIPTION OF SYMBOLS 1... Fuel tank, 2... Opening, 3... Set plate, 4... Sub tank, 5... Level sensor body, 6... Case, 7... Rotating element, 8...
...Rotating arm, 10...Float, 11...Upper limit pin, 12...Lower limit pin, 13...Spring.

Claims (1)

[Scope of utility model registration request] The fuel level sensor body is attached to the side of the sub-tank to which the fuel pump is attached, which is inserted through the opening at the top of the fuel tank, and has an arm with a length that allows it to rotate to the bottom of the sub-tank with a float at the tip. A spring is applied to the arm to hold it at the lower limit level indicating position, and from the lower limit level indicating position, the arm rotates due to buoyancy to display changes in the fuel liquid level on the outside of the fuel tank. At the same time, the arm is rotated against the spring elasticity to bring the float to the bottom surface of the sub-tank, and the arm is returned to the lower limit level indicating position by removing the force against the spring elasticity. pump unit.