JPS6314008Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an oil level detection device that appropriately detects when the oil in an oil pan falls below a specified amount.

(Prior Art) For example, in a vehicle engine, as shown in FIG. In addition, an oil level detection sensor C is located in the center of the stored oil (the center of gravity of the oil) in the oil pan B, and this is connected to the controller D. Connect the oil supply pipe L with a solenoid valve V controlled by the controller D to the auxiliary tank T, and close the ignition switch I to energize the control unit. , When the oil level in oil pan B is detected and the oil decreases to the lower limit of the specified amount, the solenoid valve V is opened to replenish the oil, and when the upper limit of the specified amount is reached, the solenoid valve V is closed and the oil is refilled. I'm trying to stop it.

Figure B shows an example of the oil level detection sensor C described above, in which a bracket _B1 protrudes from the side wall of the oil pan B toward the center of the oil, and two reed switches _S1 and _S2 are installed inside the bracket B1. A cylindrical case C ₁ made of non-magnetic material with a stopper piece C ₂ attached to the upper end is fixed, and the conductors of each reed switch S ₁ and S ₂ are connected to the controller D. A float C ₃ with a magnetic ring m embedded in the center is loosely fitted on the outside of the case C _1. When the engine is stopped, the float C ₃ may change depending on the amount of oil in the oil pan B. is up, down,
When the specified amount falls below the lower limit level _l2 , the lower switch _S2 closes and the solenoid valve V opens to replenish the oil.
When the upper limit level _l1 is reached, the upper switch _S1 is activated, the solenoid valve V is closed, and oil replenishment is stopped.

(Problem to be solved by the invention) By the way, the oil level detection sensor used in the automatic oil replenishment device as described above has a
Since the oil level detection sensor is fixedly placed in a fixed position, if the oil pan is tilted, the oil level detection sensor cannot be adjusted. Either it will be exposed above the oil surface or it will be buried, resulting in malfunction.

This idea was made to solve this problem, and even if the car body is tilted, the oil level detection sensor can closely follow changes in the condition and reliably detect the oil level without malfunctioning. The purpose is to provide a device that can operate properly.

(Means for Solving the Problems) Based on the above object, this invention uses an oil level detection device as a device for detecting the oil level by installing a support plate above the center of the oil stored inside the oil pan. A fixed rod is installed vertically on the lower half of the fixed rod, and a cam plate having a chevron-shaped cam hole is swingably supported on the lower half of the fixed rod. The movable rod is slidably and rotatably connected to the fixed rod, and its pin shaft is engaged with the cam hole, and an oil level detection sensor is mounted on the horizontal piece. .

(Function) When the vehicle body is flat, the fixed rod installed in the oil pan, the cam plate, and the movable rod that holds the oil level detection sensor are all in a vertical position, and the sensor is located at the oil level as usual. is detected and the vehicle body is tilted, the fixed rod tilts together with the vehicle body, but the cam plate is lifted in the direction of the fixed rod tilt and rotated in the opposite direction to take a vertical position, and at this time the cam plate guides the pin shaft along the mountain shape to offset the above lifting amount. In addition, the movable rod is restricted by its own vertical hole and the cam hole of the cam plate, and is not lifted up.
Since the sensor becomes a vertical plumb, it moves horizontally at the same height while remaining vertical, and detects the oil level using a float.

(Embodiment) An embodiment of this invention will be described with reference to the drawings. In FIGS. 2 and 3, 1 is located in the oil pan B at a position above the center of the stored oil in the width direction of the oil pan B. This is a support plate installed horizontally in the center of the support plate 1, and in the center of the support plate 1, there is a fixing rod 2 whose lower half is bent rearward, and its surface extends in the longitudinal direction of the oil pan B (i.e., the engine body A). The upper end of the cam plate 3, which is approximately 1/4 disc-shaped, is attached to the bent lower half of the fixed rod 2 and can be swung left and right in the longitudinal direction of the oil pan B by means of a pin shaft 3a. is supported by. In addition, the fixed rod 2 and the cam plate 3
A movable rod 4 having an L-shaped side surface with a vertical piece 4a and a horizontal piece 4b is disposed on the front side of the vertical piece 4a.
A vertically elongated hole 4c bored in the upper part of the fixing rod 2 engages with a pin shaft 2a planted in the lower part of the upper half of the fixing rod 2, and is attached to be slidable up and down and rotatable, and the lower end of the vertical piece 4a A pin shaft 4d is attached rearward to the cam plate 3, and engages with a mountain-shaped cam hole 3b formed in the cam plate 3, and is located at the top of the cam hole 3b when the oil pan B is horizontal.

On the other hand, on the horizontal piece 4b, as mentioned above, there is a cylindrical case made of non-magnetic material in which two reed switches S ₁ and S ₂ are enclosed at a predetermined interval vertically.
C ₁ and the magnetic ring m loosely inserted into it
An oil level detection sensor C consisting of a float C ₃ and its stopper piece C ₂ is fixed, and the conductor wires connected to the contacts of each reed switch S ₁ and S ₂ are connected to the oil pan B as shown in Fig. 4B. An oil supply pipe L is connected to a controller D and a power source through a base, and an oil supply pipe L equipped with a solenoid valve V controlled by the controller D is attached to the oil pan B.

With this configuration, when the engine is stopped and the vehicle body is flat, the oil pan B is also flat, and the fixing rod 2, cam plate 3, and cam plate 3 attached to the support plate 1 in the oil pan B are Both movable rods 4 are the second
If the oil pan is in a vertical state as shown by the solid line in the figure, and the oil is in the oil pan up to the specified upper limit level _l1 , the float _C3 of the oil level detection sensor C will be located above that level. Since the magnetic ring m closes the upper limit switch _S1 and closes the solenoid valve V, oil is not replenished, and when the oil decreases and reaches the lower limit level _l2 , the lower switch _S2 operates and the solenoid valve closes. V opens and oil is replenished.

Here, if oil is in oil pan B up to the specified upper limit level _l1 and the vehicle is tilted approximately 20 degrees to the right in the longitudinal direction, oil pan B will also tilt in the longitudinal direction as shown by the dotted line in Figure 2. It is also tilted to the right by about 20 degrees, and the fixing rod 2 fixed to the support plate 1 in the oil pan B is tilted clockwise by the same angle with respect to the vertical axis. At this time, the oil level will vary slightly depending on the shape of oil pan B, but it is considered to be almost the same.

On the other hand, the cam plate 3 whose upper end is pivotally supported by the pin shaft 3a on the fixed rod 2 is lifted clockwise as shown by the dotted line, and rotates counterclockwise to maintain a vertical state. Eventually, the cam hole 3b provided there also moves in the same way, resulting in a state in which it is raised clockwise from the original position. The mountain-shaped cam hole 3b has a shape that offsets the rise.

On the other hand, in the movable rod 4 having the oil level detection sensor C on the horizontal piece 4b, the float C ₃ acts as a vertical plumb and tries to maintain a vertical state, so the pin shaft 4d integrated with the rod 4 has a relative cam. The pin shaft 4d, which was initially located at the top of the cam hole 3b, enters the right inclined part of the cam hole 3b as shown in the figure and engages with the cam surface at the required height position. Then, the movable rod 4 is held at the same height position as at the beginning.

As a result, the movable rod 4 is moved horizontally from the initial solid line position to the dotted line position without being lifted upward or lowered.

Such movement of the movable rod 4 is caused by the engagement relationship between the vertical hole 4c and the pin shaft 2a on the fixed rod, as well as the cam hole 3b and pin shaft 4d of the mountain shape of the cam plate (taking into consideration the case of inclination in the opposite direction). It is permitted depending on the engagement relationship with.

During this time, the movable rod 4 is not lifted or lowered, so the oil level detection sensor C mounted on the horizontal piece 4b is not exposed or buried in the oil, and the float C ₃ is As it moves laterally on the oil surface, the magnetic ring M operates the upper switch _S1 in the case to close the solenoid valve V, just as it would do when it is flat, and oil is not replenished.

At that time, sensor C is vertical and switch
The vertical distance between S ₁ and S ₂ remains unchanged regardless of the inclination of the oil pan B, and does not interfere with the vertical movement of the float C ₃ . Furthermore, if the oil decreases to below the lower limit level in the tilted state, the float _C3 descends to operate the lower switch _S2 , and the solenoid valve V is opened to replenish the oil.

When the oil pan B, that is, the vehicle body becomes horizontal again, the fixed rod 2, cam plate 3, and movable rod 4 return to the state shown by the solid line in FIG. 2. In this case as well, sensor C
Due to the vertical weight action, the movable rod 4 tries to maintain its vertical position, and the pin shaft 4a moves laterally (relatively rises) in the cam hole 3a and returns to its original state. Furthermore, the same thing can be said when the oil pan B is tilted to the opposite side.

(Effects of the invention) As described above, according to this invention, the oil level detection sensor is movably arranged via a movable rod with respect to a fixed rod vertically installed toward the center of the oil stored in the oil pan. Therefore, even if the vehicle body is tilted, the oil level detection sensor can be placed in an appropriate position, and the oil level can be appropriately detected without malfunctioning as in the conventional case.

[Brief explanation of the drawing]

Figure 1A is a system diagram of a conventional oil supply device. Figure B is a cross-sectional view of the oil level detection sensor. FIG. 2 is a front view of an embodiment of this invention. FIG. 3 is a side sectional view thereof. FIGS. 4A and 4B are explanatory diagrams showing how they are installed in an oil pan or the like. In the diagram, A...Engine body, B...Oil pan, C...Oil level detection sensor, D...Controller, V...
...Solenoid valve, 1...Support plate, 2...Fixing rod, 2a...
...Pin shaft, 3...Cam plate, 3a...Pin shaft, 3b
...Cam hole, 4...Movable rod, 4a...Vertical piece, 4
b...Horizontal piece, 4c...Long hole, 4d...Pin shaft.

Claims (1)

[Scope of utility model registration request] A support plate 1 is installed above the center of the stored oil inside the oil pan B, a fixing rod 2 is vertically installed in the center of the support plate 1, and a mountain-shaped cam hole 3b is provided in the lower half of the fixing rod 2. A movable rod 4 having an L-shape formed by a vertical piece 4a and a horizontal piece 4b is attached to the front side of the fixed rod 2 and the cam plate 3 so as to be slidable relative to the fixed rod 1. The oil level detection device has an oil level detection sensor C mounted on the horizontal piece 4b, the pin shaft 4d of which is rotatably connected to the cam hole 3b.