Sensor sealing structure

Abstract

The utility model provides a sensor sealing structure, which is used for fuel oil level sensing, the sealing structure comprises a plurality of plastic-coated terminals, a plurality of sealing rings and a sensor main body, the sealing rings are arranged on the plastic-coated terminals, the plastic-coated terminals are arranged on the sensor main body, the plastic-coated terminals comprise terminals, rubber coating and wire harnesses, and the wire harnesses are arranged on the plastic-coated terminals. The wire harness is connected with the terminal through welding, the rubber coating is connected with one end of the terminal and the wire harness in a coating manner, the rubber coating comprises an insertion part and a main body part, the insertion part is provided with a sealing groove, and the sealing ring is connected in the sealing groove in a sleeving manner; and the insertion part is inserted into and connected with the sensor main body. According to the invention, parts of the sensor are better protected, and the service life of the sensor is longer.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuel pump structure, specifically, relate to a kind of sensor wire harness encapsulation sealing structure of fuel pump in the fuel supply system of vehicle. BACKGROUND

[0002] Fuel tank level sensor for vehicle is applied to automobile fuel supply system, and it inducts and outputs oil level height value, so that automobile instrument receives signal, handles and shows oil level height, to provide fuel tank oil quantity information for driver, so as to prevent vehicle from stopping halfway due to fuel exhaustion, and the oil level sensor is installed on electric fuel pump assembly, and the electric fuel pump assembly is installed in automobile fuel tank and directly immersed in fuel, therefore, the oil level sensor is also directly immersed in fuel.However, when in M100 methanol gasoline, E100 ethanol gasoline or in poor gasoline, sensor terminal can cause serious corrosion.

[0003] The terminal connection of prior art full-sealed sensor only uses the interference fit between terminal and shell to seal the sensor, and part of the terminals are still exposed outside, so gasoline can still corrode the terminals, and methanol gasoline can also make the positive and negative electrodes conductive, leading to line short circuit; if the terminal is sealed by using glue, after the glue dries and shrinks, there is still a risk parameter gap between the glue and the shell, leading to gasoline entering the sensor, and ultimately leading to failure.

[0004] Therefore, the sensor sealing structure of the fuel pump of prior art still has room for improvement. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of sensor sealing structure of fuel pump in the fuel supply system of vehicle, to solve the problems of prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A kind of sensor sealing structure is provided for fuel oil level sensing, the sealing structure includes a plurality of plastic-coated terminals, a plurality of sealing rings and a sensor body, the sealing ring is arranged on the plastic-coated terminal, and the plastic-coated terminal is arranged on the sensor body, wherein the plastic-coated terminal includes a terminal, a plastic coating and a wire harness, the wire harness is connected to the terminal by welding, the plastic coating is connected to one end of the terminal and the wire harness, the plastic coating includes an insertion part and a main body part, the insertion part is provided with a sealing groove, and the sealing ring is sleeved in the sealing groove;The insertion part is inserted into the sensor body.

[0008] Preferably, the other end of the terminal is connected to a resistance sheet by a connecting sheet.

[0009] Preferably, the sensor body comprises a base and an upper cover, and the upper cover is ultrasonically connected with the base to form a sealed space.

[0010] The purpose of the present application is to seal the prior art sensor, not only effectively protect the service life and performance of internal components such as circuit board, but also protect the terminals and wire harness to some extent, overcome the corrosion and conductivity of M100 methanol gasoline, E100 ethanol gasoline or poor gasoline, and the specific purposes are as follows:

[0011] (1) The plastic coating treatment is used for the wire harness and terminal welding part, the gasoline is isolated by the plastic, and the welding points and part of the terminals are effectively protected;

[0012] (2) Two sealing rings are used to more effectively protect the exposed part of the terminal and effectively isolate the entry of gasoline;

[0013] (3) The positive and negative electrodes of the sensor are prevented from being conducted in gasoline, and the signal output of the oil level is affected.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The present application better protects the sensor parts, and the service life of the sensor is longer;

[0016] 2. The present application has higher accuracy compared with the traditional sensor;

[0017] 3. The present application is widely applied and can match different shape fuel tanks and different fuel requirements of fuel pump assemblies.

[0018] Of course, any one of the specific embodiments implementing the content of the present application does not necessarily achieve all the above technical effects at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent through reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the appearance of the sensor of the present application;

[0021] Figure 2 It is Figure 1 a partial sectional view;

[0022] Figure 3 It is Figure 1 an explosion schematic diagram

[0023] Figure 4 It is a sectional view of the plastic-coated terminal of the present application;

[0024] Figure 5Fig. 2 is a cross-sectional view of a plastic-coated terminal and a sensor main body portion according to the present application. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of variations and improvements can be made. These all belong to the protection scope of the utility model.

[0026] Please refer to Figure 1 The sensor appearance schematic diagram of the application, the application is a kind of in the fuel supply system of vehicle, fuel pump assembly is fixed on oil tank, therefore, oil level sensor is also directly immersed in fuel, the sealing structure of the application makes that gasoline and terminal are isolated, copper terminal is protected, and sensor positive and negative terminal can also be isolated, to prevent sensor short circuit failure.

[0027] Please refer to Figure 2 、 Figure 3 、 Figure 4 And Figure 5 The sealing structure of the sensor of the application is used for fuel oil level sensing, the sealing structure includes a plurality of plastic-coated terminals 10, a plurality of sealing rings 20 and a sensor main body 30, the sealing ring 20 is arranged on the plastic-coated terminal 10, the plastic-coated terminal 10 is arranged on the sensor main body 30, as shown in Figure 3 The resistance line on the resistance sheet 50 of the application is two, so the number of the plastic-coated terminal 10 is two, but it can not be used to limit the application, the number of the plastic-coated terminal 10 can be set in coordination with the resistance line on the resistance sheet 50.

[0028] As Figure 4As shown, the plastic-coated terminal 10 includes a terminal 11, a plastic-coated part 12, and a wire harness 13 connected by welding the terminal 11, and the plastic-coated part 12 covers one end of the terminal 11 and one end of the wire harness 13. In processing, the wire harness 13 and the terminal 11 are welded first, and then the welding position is completely isolated from gasoline by plastic coating treatment to prevent corrosion and failure of the welding position; the plastic-coated part 12 includes an insertion part 121 and a main body part 122, the insertion part 121 is provided with a sealing groove 1211, and the sealing ring 20 is sleeved in the sealing groove 1211. In the embodiment of the application, the number of sealing grooves 1211 on each plastic-coated part 12 is two, so the number of sealing rings 20 sleeved on each plastic-coated part 12 is two, but this cannot be used to limit the application, as long as the number of sealing requirements should be the protection scope of the application; the insertion part 121 is inserted into the sensor main body 30, as Figure 5 As shown, the sensor main body 30 is provided with a circular insertion hole corresponding to the shape of the insertion part 121, and the insertion part 121 is inserted into the circular insertion hole, and two sealing rings 20 form a sealed protection to prevent fuel from entering and corroding the terminal 11, that is, the plastic-coated terminal 10 and the sensor main body 30 are isolated from gasoline by the intermediate addition of the sealing ring 20 to prevent gasoline from contacting the copper connector, and also to prevent gasoline from entering the sensor through the copper connector.

[0029] Please refer to Figure 2 and Figure 3 , the other end of the terminal 11 is welded to the resistance sheet 50 through the connecting sheet 40. In the embodiment of the application, since the resistance wire on the resistance sheet 50 is two, the number of connecting sheets 40 used is also two, but this cannot be used to limit the application, Figure 3 The number of resistance wires on the resistance sheet 50 in the application can be up to four.

[0030] As Figure 3As shown, the sensor body 30 includes a base 31 and an upper cover 32, the upper cover 32 is ultrasonically connected to the base 31 to form a sealed space; before the upper cover 32 is ultrasonically connected to the base 31, the terminal 11 and the wire harness 13 are welded, and then the plastic package 12 is wrapped outside by an injection molding machine to obtain the plastic package terminal 10, the plastic package 12 effectively protects the welding points of the terminal 11 and the wire harness 13 from corrosion; then two sealing rings 20 are sleeved on the plastic package terminal 10, and then inserted into the fully sealed sensor body 30, the terminal 11 is welded to one end of the connecting piece 40, and the other end of the connecting piece 40 is welded to the resistance piece 50, then the inner magnetic steel 60 is arranged on the inner rocker arm 70, and the inner rocker arm 70 is arranged on the base 31, and the process of ultrasonically connecting the upper cover 32 to the base 31 can be carried out; after assembly, the methanol gasoline is blocked outside the sensor body 30 by the sealing ring 20, so that the terminal 11 is not corroded, and the positive and negative electrodes of the sensor are effectively separated from the methanol gasoline and are not turned on and short-circuited, causing failure.

[0031] The highlight and special design structure of the sensor sealing structure of the present application:

[0032] When the oil pump assembly is used in M100 methanol gasoline, E100 ethanol gasoline or poor gasoline, the traditional sensor terminal and wire harness are welded and exposed outside, which can cause corrosion of the welding position and the terminal, the sensor sealing structure of the present application directly wraps the plastic at the welding position, effectively preventing the welding position and the terminal from being exposed to gasoline and being corroded by gasoline, etc. In addition, methanol gasoline has a certain conductivity, and the exposed terminal can cause the positive and negative electrodes to be connected, the sensor sealing structure of the present application uses two sealing rings 20 to perform double-layer sealing between the plastic package terminal 10 and the sensor body 30, effectively isolating the gasoline outside and reducing the failure risk caused by conduction. At the same time, the plug-in structure of the plastic package terminal 10 also facilitates the maintenance and replacement of the later period.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] 1. The present application better protects the sensor parts, and the service life of the sensor is longer;

[0035] 2. Compared with the traditional sensor, the present application has higher accuracy;

[0036] 3. The application platform is widely applied, and can match different shape fuel tanks and different fuel requirements of fuel pump assemblies.

[0037] Of course, any one of the embodiments implementing the content of the present application does not necessarily have all the above technical effects at the same time.

[0038] The above disclosed is only the preferred embodiment of the present application, but is not used to limit itself, any skilled person in the art makes the equivalent change and change without violating the spirit and connotation of the present application, and falls within the protection scope of the present application.

Claims

1. A sensor seal structure for a fuel level sensor, comprising: The sealing structure comprises a plurality of plastic-coated terminals, a plurality of sealing rings and a sensor body, the sealing rings are arranged on the plastic-coated terminals, and the plastic-coated terminals are arranged on the sensor body, wherein The plastic-coated terminal comprises a terminal, a plastic coating and a wire harness, the wire harness is connected to the terminal by welding, the plastic coating is connected to one end of the terminal and the wire harness, the plastic coating comprises an insertion part and a main body part, the insertion part is provided with a sealing groove, and the sealing ring is sleeved in the sealing groove; and the insertion part is inserted into the sensor body.

2. The sensor seal structure of claim 1, wherein, The other end of the terminal is connected to a resistance sheet by a connecting sheet.

3. The sensor seal structure of claim 2, wherein, The sensor body comprises a base and an upper cover, and the upper cover is ultrasonically connected to the base to form a sealed space.

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