Oil level alarm mechanism of oil tank

Abstract

The utility model discloses an oil level alarm mechanism of an oil tank, which comprises a shell, a floating ball and a floating ball rod, the floating ball is arranged at the tail end of the floating ball rod, a fixing frame and a resistor disc support are arranged in the shell, the fixing frame is connected with the resistor disc support in a buckling mode, a resistor disc is arranged on the resistor disc support, and a sensor is further arranged on the resistor disc support. The sensor is matched with the resistor disc support in a concave-convex inserting mode through the sensor inserting piece and electrically connected with the resistor disc, a rotating seat is arranged on the shell, the front end of the floating ball rod is bent and connected to the rotating seat, a rocker arm is further arranged on the rotating seat, and the end of the rocker arm is in sliding contact with the resistor disc. A copper wire is arranged between the resistor disc and the sensor insert, one end of the copper wire is soldered with the resistor disc, and the other end of the copper wire is soldered with the sensor insert. The cover plate is ensured not to easily cut off the sensor insertion piece and the resistor disc in the ultrasonic welding process, the technical effect of reasonable and reliable structure is realized, and the damage to the circuit in the ultrasonic welding process is avoided.

Description

Technical Field

[0001] The utility model relates to a liquid level monitoring component of an automobile oil tank, in particular to an oil level alarm mechanism of the oil tank. Background Art

[0002] The main structure of the traditional liquid level alarm mechanism includes a resistor and a slide that slides on the resistor. The slide is connected to the float rod. The float floats up and down with the oil, driving the float rod to rotate, and then the slide rotates to the corresponding position on the resistor and outputs the corresponding voltage, thereby completing the liquid level monitoring. In the actual structure, there is also a shell, in which the resistor, mounting plate, and slide sensor are installed. The plug on the sensor is connected to the resistor. After these components are installed in the shell, a cover plate is covered to seal the upper opening of the shell. The connection between the cover plate and the shell is ultrasonic welding, which can seal the fuel from penetrating into the shell. Ultrasonic welding will generate high-frequency vibrations, resulting in looseness or even detachment between a few sensor plugs and the resistor, which affects the uninterrupted power supply between the slide and the resistor, greatly affecting the reliability of the product. After detection, the cover plate can only be disassembled for repair. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide an oil level alarm mechanism with a reasonable and reliable structure to avoid damage to the circuit during ultrasonic welding.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil level alarm mechanism of an oil tank, comprising a shell, a float and a float rod, the float is installed at the tail end of the float rod, a resistor bracket is installed in the shell, a resistor is installed on the resistor bracket, a sensor is also arranged on the resistor bracket, the sensor is engaged with the resistor bracket through a concave-convex plug-in and is conductively connected to the resistor through a sensor plug-in, a rotating seat is arranged on the shell, the front end of the float rod is bent and connected to the rotating seat, a rocker arm is also arranged on the rotating seat, the end of the rocker arm is in slidable contact with the resistor, a copper wire is arranged between the resistor and the sensor plug-in, one end of the copper wire is soldered to the resistor, and the other end of the copper wire is soldered to the sensor plug-in.

[0005] Two limit baffles are also arranged on the resistor bracket, and the movable end of the rocker arm is arranged between the two limit baffles.

[0006] It also includes a cover plate, which is provided with a square ring-shaped recessed positioning groove, and the opening end surface of the shell is provided with a square ring-shaped raised inserting strip arranged along its contour, and the inserting strip is inserted into the positioning groove and then connected by ultrasonic welding.

[0007] The resistor sheets have two pieces and are arranged in an arc shape on the rotating track of the rocker arm. The rocker arm is provided with contact slide bars corresponding to the two resistor sheets one by one, and the contact slide bars can slidably contact with the corresponding resistor sheets.

[0008] The beneficial effects of the utility model are as follows: the sensor is conductively connected to the resistor sheet through the concave-convex plug-in fit of the sensor plug-in and the resistor sheet bracket, and the sensor plug-in and the resistor sheet are connected by copper wire soldering, so that the conductive connection structure of the two paths is more reliable, ensuring that the sensor plug-in and the resistor sheet are not easily broken during the ultrasonic welding process of the cover plate, and achieving a technical effect of reasonable structure and reliability.

[0009] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0011] Figure 2 This is a diagram of the inner wall structure of a specific implementation method of the utility model;

[0012] Figure 3 It is a partial cross-sectional view of a specific implementation method of the utility model;

[0013] Figure 4 for Figure 3 A is an enlarged view of the middle image. DETAILED DESCRIPTION

[0014] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0015] like Figure 1 — Figure 4 As shown, this embodiment discloses an oil level alarm mechanism of an oil tank, comprising a housing 1, a float 2 and a float rod 3, the float 2 is mounted at the tail end of the float rod 3, a resistor bracket 5 is mounted in the housing 1, a resistor 4 is mounted on the resistor bracket 5, a sensor is also arranged on the resistor bracket 5, the sensor is connected to the automobile electronic control unit ECU, the sensor is engaged with the resistor bracket 5 through a sensor plug 6 and is conductively connected to the resistor 4, a rotatable rotating seat 7 is arranged on the housing, the front end of the float rod 3 is bent and connected to the rotating seat 7, a rocker arm 8 is also arranged on the rotating seat 7, the end of the rocker arm 8 is in slidable contact with the resistor 4, a copper wire is arranged between the resistor 4 and the sensor plug 6, one end of the copper wire is soldered to the resistor 4, and the other end of the copper wire is soldered to the sensor plug 6, as shown in the specific Figure 2 As shown in , there are two copper wires, and thus four soldering points 20.

[0016] Two limit baffles 9 are also configured on the resistor bracket 5, and the movable end of the rocker arm 8 is arranged between the two limit baffles 9. The rotation of the rocker arm 8 can be limited by each limit baffle 9 of the chain, so that its swing is more reliable.

[0017] The cover plate 10 is provided with a square ring-shaped recessed positioning groove 101, and the opening end surface of the shell 1 is provided with a square ring-shaped raised insert 11 arranged along its contour. The insert 11 is inserted into the positioning groove 101 and then connected by ultrasonic welding. This structure can make the matching and positioning between the cover plate 10 and the shell 1 more reliable, and at the same time, the contact surface is larger, which effectively improves the reliability of ultrasonic welding.

[0018] There are two resistor sheets 4 which are arranged in an arc shape on the rotating track of the rocker arm 8. The rocker arm 8 is provided with contact slide bars corresponding to the two resistor sheets 4 one by one. The contact slide bars can slide in contact with the corresponding resistor sheets 4, thereby ensuring that the conductive contact between the resistor sheets 4 and the rocker arm 8 is more reliable and stable.

[0019] By adopting the above technical solution, the sensor is conductively connected to the resistor 4 through the sensor plug 6 and the resistor bracket 5, and the sensor plug 6 and the resistor 4 are connected by copper wire soldering. This makes the conductive connection structure of the two paths more reliable, ensuring that the cover plate 10 is not likely to cause the sensor plug 6 and the resistor 4 to be broken during the ultrasonic welding process, achieving a technical effect of reasonable and reliable structure and avoiding damage to the circuit during the ultrasonic welding process.

[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An oil level alarm mechanism for an oil tank, comprising a housing, a float and a float rod, wherein the float is mounted at the tail end of the float rod, a resistor bracket is mounted in the housing, a resistor is mounted on the resistor bracket, and a sensor is also configured on the resistor bracket, the sensor is matched with the resistor bracket through a concave-convex plug-in of the sensor plug and is conductively connected to the resistor, characterized in that: A rotating seat is arranged on the shell, the front end of the float rod is bent and connected to the rotating seat, and a rocker arm is also arranged on the rotating seat. The end of the rocker arm is in slidable contact with the resistor sheet, and a copper wire is arranged between the resistor sheet and the sensor plug-in. One end of the copper wire is soldered to the resistor sheet, and the other end of the copper wire is soldered to the sensor plug-in.

2. The oil level alarm mechanism of the oil tank according to claim 1, characterized in that: Two limit baffles are also arranged on the resistor bracket, and the movable end of the rocker arm is arranged between the two limit baffles.

3. The oil level alarm mechanism of the oil tank according to claim 1, characterized in that: It also includes a cover plate, which is provided with a square ring-shaped recessed positioning groove, and the opening end surface of the shell is provided with a square ring-shaped raised inserting strip arranged along its contour, and the inserting strip is inserted into the positioning groove and then connected by ultrasonic welding.

4. The oil level alarm mechanism of the oil tank according to claim 1, characterized in that: The resistor sheets have two pieces and are arranged in an arc shape on the rotating track of the rocker arm. The rocker arm is provided with contact slide bars corresponding to the two resistor sheets one by one, and the contact slide bars can slidably contact with the corresponding resistor sheets.

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