JPS6023708Y2 - Vehicle liquid level detection meter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid level detector for detecting the liquid level in a fuel tank or the like of a vehicle such as a vehicle.

This type of liquid level detector, which is well known in the past, consists of a float, an arm, and a sliding body that move according to the liquid level, and a main body and a resistor that are fixed to the tank.The detected resistance value changes as the liquid level changes. is changing.

However, with the above-mentioned conventional system, the liquid level in the tank fluctuates greatly due to centrifugal force and vibrations that occur depending on the driving condition of the vehicle, especially when the vehicle turns, and the float also fluctuates accordingly. However, there is a problem in that it is not possible to detect the position of the camera, and false detection may occur.

Conventionally, in order to solve the above problem, a pendulum is used to detect the slope of the liquid level, and when the liquid level is sloped, a retaining part is moved to the pendulum by the displacement of the pendulum, and this engaging part is engaged with a gear. It has been considered to stop the movement of the arm and float and detect the liquid level before the tilt when the liquid level is tilted, but it is possible to move the engaging part together with the pendulum and use this retaining part as a gear. Since the gear is engaged, if the pendulum is suddenly displaced, the retaining part may collide with the gear, causing the retaining part to deform and become unable to perform its function. There's a problem.

Therefore, in order to solve the above-mentioned problem, the present invention has a vibration-free bushing that presses the retaining part provided on the plate toward the gear with a spring, and has a weight attached below.
When in the vertical state, the push-up part provided at the upper end pushes up the protrusion to release the engagement between the retaining part and the gear, and when the pusher tilts more than a predetermined value, the push-up of the protrusion by the push-up part is released. By configuring the engaging part to engage the gear, the retaining part can be engaged with the gear with a predetermined force by the elastic force of the spring, regardless of the displacement speed of the bushing. It is an object of the present invention to provide a liquid level detector that can reliably prevent erroneous detection of the liquid level when the liquid level is tilted, such as when turning a vehicle, without deforming the joint part.

The present invention will be described below with reference to embodiments shown in the drawings.

First, the first embodiment shown in FIG. 1 will be explained.
The main body is fixed inside the vehicle's fuel tank.

2 is a resistor fixed to the main body 1, 3 is a slider that comes into sliding contact with the resistor 2, 4 is a float and is attached to the tip of an arm 5, and the other end of the arm 5 is bent to serve as a pivot point. Part 5a
is formed, and the arm 5 rotates around this rotation fulcrum 5a.
is rotatably attached to the main body 1.

Reference numeral 6 denotes a fan-shaped gear having an arc upward, and is fixed to the rotation fulcrum portion 5a of the arm 5 together with the sliding body 3, so that it rotates together with the sliding body 3 as the arm 5 rotates. .

Reference numeral 7 denotes an L-shaped plate spring whose one end is fixed to the main body 1 with a rivet 1a, and 8 is a plate whose one end is fixed to the other end of the plate spring 7. The tip of this plate 8 is bent to form a wedge-shaped retaining part 8a. is formed.

A force that presses the engagement portion 8a toward the gear 6 due to the elastic force of the plate spring 7 is applied to the engagement portion 8a.

Reference numeral 9 denotes a bushing par arranged in a vertical direction, and a spherical rotation fulcrum portion 9a is formed in the upper middle portion of the bushing par.
It is attached so that it can freely vibrate about the spherical rotation fulcrum part 9a.

Reference numeral 10 denotes a weight fixed below the pusher 9, and due to the gravity acting on the weight 10, the pusher 9 is in a vertical state when the vehicle is not accelerating and is traveling on a flat road.

Further, the upper end of the pusher 9 is formed with a conical push-up portion 9b having a spherical tip.

Reference numeral 11 designates a protruding portion 11 that is formed by punching out and protruding downward from the plate 8, and this protruding portion 11 is formed in the shape of a truncated cone.

The protruding portion 11 and the push-up portion 9b of the bushing par 9 are provided at opposing positions, so that the bushing par 9
When the pusher 9 is in the vertical state, the protrusion 11 is pushed up by the push-up part 9b to disengage the engagement part 8a and the gear 6, as shown in FIG. As shown in FIG. 3, the push-up portion 9b and the protruding portion 11 are disengaged, and the engaging portion 8a engages with the gear 6 due to the elastic force of the plate spring 7.

Next, the operation of the above configuration will be explained.

When the vehicle is not applying acceleration and is traveling on a flat road, the bush bar 9 is in a vertical state,
As shown in FIG. 2, the protruding portion 11 is
Since the engaging portion 8a and the gear 6 are pushed up, the engaging portion 8a and the gear 6 are not engaged with each other.

This causes the float 4 to be displaced according to the liquid level.
The arm 5 rotates around the rotation fulcrum 5a in accordance with the displacement of the arm 5, and as the arm 5 rotates, the sliding body 3 comes into sliding contact with the resistor 2, and the liquid level changes as a resistance value change. Detect.

When the push bar 9 tilts by a predetermined value or more due to inertia or gravity applied to the weight 10 when the vehicle turns or runs, the push-up portion 9b and the protrusion 11 disengage as shown in FIG. The engaging portion 8a engages with the gear 6 due to the elastic force of the plate spring 7.

At this time, since the retaining portion 8a is formed in a wedge shape, even if the engaging portion 8a and the teeth of the gear 6 are slightly misaligned, the two can be reliably engaged.

As a result of this engagement, the rotation of gear 6 is stopped, so
The sliding body 3, arm 5 and float 4 stop at that position,
Prevents false detection of liquid level due to slope of liquid level.

In this state, when the acceleration applied to the vehicle disappears and the vehicle starts traveling on a flat road, the bush bar 9 returns to the vertical state due to the gravity of the weight 10, and pushes up the push-up portion 9b against the elastic force of the plate spring 7. The protruding portion 11 is pushed up to release the engagement between the engaging portion 8a and the gear 6.

Thereby, the liquid level can be detected as a change in resistance value based on the displacement of the float 4 again.

Here, by making the shape of the protruding part 11 into a truncated conical shape and making the tip of the pushing-up part 9b into a spherical shape, the protruding part 11
The engagement and disengagement operations between the push-up portion 9b and the push-up portion 9b are performed smoothly.

FIG. 4 shows a second embodiment of the present invention, which is different from the first embodiment in that the arc of the fan-shaped gear 6 is shaped downward, and the plate 8 is supported by a fulcrum pin 8b at its intermediate portion. The coil spring 7a is rotatably attached to the main body 1, and one end of the coil spring 7a is attached to the end of the plate 8 opposite to the engaging portion 8a, and the other end is attached to the main body 1. A protrusion 11 is provided between the spring 7a and the protrusion 11, and the protrusion 11 is pushed up by the push-up part 9b of the bushing bar 9 against the tension of the coil spring 7a, thereby securing the space between the engagement part 8a and the gear 6. This is done to remove the coincidence.

FIG. 5 shows a third embodiment of the present invention, in which a plate 8 is connected to a fulcrum pin 8 at an intermediate portion of the plate 8 in contrast to the first embodiment.
b to be rotatably attached to the main body 1, and one end of the spiral spring 7b is attached to the end of the plate 8 opposite to the engaging portion 8a, and the other end is fixed to the main body 1. A protruding part 11 is provided between the part 8a and the fulcrum pin 8b, and the protruding part 11 is pushed up by the push-up part 9b of the bushing bar 9 against the elastic force of the spiral spring 7b, and the engaging part 8a and the gear 6 are pushed up. This is to remove the bond between the two.

FIG. 6 shows a fourth embodiment of the present invention, in which the plate 8 is rotatably attached to the main body 1 at the end opposite to the engaging portion 8a by a fulcrum pin 8b, in contrast to the first embodiment. For installation, one end of the plate spring 7 is pressed into contact with the plate 8.

In addition, in each of the embodiments described above, the gear 6 is not limited to a fan shape but may be circular.

As described above, in the present invention, when the engaging part provided on the plate is pressed toward the gear by a spring, and the freely vibrating bushing bar with a weight provided at the bottom is in a vertical state, A configuration in which the protrusion is pushed up by the pusher to disengage the engagement part from the gear, and when the push bar is tilted by a predetermined value or more, the push-up of the protrusion by the push-up part is released and the engagement part is engaged with the gear. Therefore, regardless of the displacement speed of the bushing bar, if the bushing bar tilts by more than a predetermined value, the elastic force of the spring allows the engaging part to engage the gear with a predetermined force, causing the plate and the retaining part to deform. This has the excellent effect of reliably preventing erroneous detection of the liquid level when the liquid level is tilted such as when turning a vehicle.

Furthermore, since the bushing bar is attached to the main body via a spherical pivot point so that it can vibrate freely, not only can acceleration and inclination be detected in any direction, front, back, left, or right, but the bush bar can also be vibrated smoothly. This has the excellent effect of being able to reliably detect the slope of the liquid level.

In addition, since the push-up part of the push bar is designed to push up the protrusion part of the plate, there is a moderation in the engagement and disengagement between the protrusion part and the push-up part, and the engagement between the retaining part and the gear is controlled. This has the excellent effect of reliably ensuring alignment and release.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing a first embodiment of the device of the present invention, FIGS. 2 and 3 are partially sectional front views of essential parts for explaining the operation of the device shown in FIG. 1, and FIGS. FIG. 6 is a partially sectional front view of main parts showing second to fourth embodiments of the device of the present invention. 1... Main body, 4... Float, 5... Bent arm, 5a... Rotation fulcrum, 6... Bent gear, 7
・Curved/plate spring, 7a...Coil spring, 7
b...Curved spiral spring, tail...Plate, 8a
...Curved engagement part, 8b...Fully point hinge, 9...Curved butshu bar, 9a.Curved/spherical rotation fulcrum part, 9b...
...Pushing up part, 1o...Weight, 11...
...protrusion.

Claims (1)

[Claims for Utility Model Registration] 11 A float is provided at the tip of an arm that is rotatable about a rotational fulcrum with respect to the main body, and the float moves in accordance with the liquid level to control the rotational fulcrum. A liquid level detector for a vehicle is configured to rotate the arm around the center and detect the liquid level by the rotation of the arm. a plate provided with a retaining portion that engages with the teeth of the plate; a spring for pressing the retaining portion of the plate toward the gear; and a protruding portion provided on the plate by being pulled out downward. , a vertically arranged bushing bar provided below the protrusion so as to be able to freely vibrate about a spherical pivot fulcrum with respect to the main body; a weight fixed below the bushing bar; When the bushing bar is in a vertical state, the protruding part of the plate is pushed up to disengage the engaging part of the plate and the gear, and when the bushing bar is tilted by more than a predetermined value, it is disengaged from the protruding part. A liquid level detector for a vehicle, comprising a push-up part for enabling engagement between the engagement part and the gear. 2. The liquid level detector for a vehicle according to claim 1, wherein the engaging portion of the plate is formed in a wedge shape. 3. The liquid level detector for a vehicle according to claim 1 or 2, wherein the protrusion is integrally formed on the plate by stamping. 4. The vehicle according to claim 1, wherein the spring is a plate spring having one end attached to the plate and the other end attached to the main body. Liquid level detection meter. 5. The liquid level detector for a vehicle according to claim 4, wherein the plate is held on the main body by the plate spring. 6. The vehicle according to any one of claims 1 to 3, wherein the spring is a coil spring having one end attached to the plate and the other end attached to the main body. Liquid level detection meter. 7. The vehicle according to any one of claims 1 to 3, wherein the spring is a spiral spring having one end attached to the plate and the other end attached to the main body. Liquid level detection meter. 8. The liquid level detector for a vehicle according to claim 6 or 7, wherein the plate is rotatably attached to the main body by a fulcrum pin. 9 Utility model registration claims 1 to 8, characterized in that the tip of the push-up portion is formed in a spherical shape.
A liquid level detection meter for a vehicle according to any one of the items. 10. The liquid level detector for a vehicle according to any one of claims 1 to 9, wherein the protrusion is formed in a truncated cone shape.