阅读说明：本技术 油位传感器 (Oil level sensor ) 是由 孙国庆 卢焕校 孙新益 李硕 于 2020-12-28 设计创作，主要内容包括：本发明提供一种油位传感器,所述油位传感器包括浮子杆组立、摇臂组立、基座组立和引线组立,所述基座组立包括骨架组立和基座,所述骨架组立包括骨架、霍尔芯片、两个电容和三个接线片,三个所述接线片设置在所述骨架上,所述骨架为一片体,所述骨架包括一通孔和两个八字槽,每个所述八字槽包括四个定位筋形成的八字定位槽,两个所述电容设置在所述骨架上,所述电容的连接脚分别定位在所述八字槽中,所述电容的连接脚连接所述接线片；所述霍尔芯片设置在所述骨架上,所述霍尔芯片贯穿所述通孔凸出于所述骨架,所述骨架设置在所述基座上。本申请利用骨架的定位筋将电子元件固定在骨架上,进行注塑,使之成为基座,工艺更简单有效。(The invention provides an oil level sensor which comprises a float rod assembly, a rocker arm assembly, a base assembly and a lead wire assembly, wherein the base assembly comprises a framework assembly and a base, the framework assembly comprises a framework, a Hall chip, two capacitors and three lugs, the three lugs are arranged on the framework, the framework is a sheet body, the framework comprises a through hole and two splayed grooves, each splayed groove comprises a splayed positioning groove formed by four positioning ribs, the two capacitors are arranged on the framework, connecting pins of the capacitors are respectively positioned in the splayed grooves, and the connecting pins of the capacitors are connected with the lugs; the Hall chip is arranged on the framework, penetrates through the through hole and protrudes out of the framework, and the framework is arranged on the base. This application utilizes the location muscle of skeleton to fix electronic component on the skeleton, moulds plastics, makes it to become the base, and the technology is simpler effective.)

1. An oil level sensor, comprising a float rod assembly, a rocker arm assembly, a base assembly and a lead assembly, wherein the float rod assembly is arranged on the rocker arm assembly, the rocker arm assembly is arranged on the base assembly, and the lead assembly is arranged on the base assembly; wherein the content of the first and second substances,

the base assembly comprises a framework assembly and a base, the framework assembly comprises a framework, a Hall chip, two capacitors and three lugs, the three lugs are arranged on the framework, the framework is a sheet body, the framework comprises a through hole and two splayed grooves, each splayed groove comprises a splayed positioning groove formed by four positioning ribs, the two capacitors are arranged on the framework, connecting pins of the capacitors are respectively positioned in the splayed grooves, and the connecting pins of the capacitors are connected with the lugs; the Hall chip is arranged on the framework, penetrates through the through hole and protrudes out of the framework, and the framework is arranged on the base.

2. The fuel level sensor of claim 1, further comprising an upper lead cover and a lower lead cover, wherein the lead assembly includes three power lines, three of the power lines are respectively connected to three of the terminal strips, the three power lines are connected through the upper end of the base, and the upper lead cover and the lower lead cover are respectively connected to two sides of the upper end of the base.

3. The fuel level sensor of claim 2, wherein the float rod assembly includes a float collar, a float and a float rod, the float collar is retained on the float rod after the float is inserted into one end of the float rod, and the other end of the float rod is bent at 90 degrees.

4. The fuel level sensor of claim 3, wherein the rocker arm assembly includes a rocker arm cover, a rocker arm, a retainer ring, and two magnets;

the rocker arm comprises a main ring body, a connecting ring and a supporting sheet, the connecting ring is arranged on the outer edge of the main ring body, the supporting sheet is arranged on the outer edge of the main ring body and corresponds to the connecting ring,

the main ring body is a hollow double-layer ring body, the inner edge of the main ring body comprises a ring body bottom plate, the inner edge of the inner ring of the main ring body comprises two arc-shaped clamping pieces, the check ring is arranged at the inner edge of the outer ring of the main ring body, and the two magnets are arranged between the outer edge of the inner ring of the main ring body and the inner edge of the check ring;

one side of the ring body bottom plate is connected with two corresponding first clamping columns, an upper cover through hole is formed in the position, corresponding to the first clamping columns, of the rocker arm cover, and the first clamping columns are inserted into and connected with the upper cover through hole to limit the rocker arm cover on the rocker arm;

the support sheet is a sheet body, and one side of the support sheet is connected with at least two corresponding second clamping columns.

Technical Field

The invention relates to an automobile fuel supply device, in particular to an oil level sensor which is arranged in a fuel pump assembly in an automobile fuel supply system and plays a role in outputting signals of the height of a liquid level in a fuel tank.

Background

With the development of science and technology and the advancement of technology, automobile products are changing day by day, and higher requirements are also put forward on fuel supply products, and automobile parts are important fields participating in globalization in the automobile industry in China. In response to the rapid development of electronic technology and the wide application thereof in the automobile industry, the degree of automobile electronization is higher and higher, and the safety of automobiles is also required to be higher and higher. According to statistics, as much as 70% of automobile faults are caused by an electric system, and the electric system faults are caused by a plurality of reasons, but some faults are caused by poor fuel supply devices, the faults affect the functions of certain aspects of the automobile, even the disasters of car crash occur, and therefore, the reliability of the automobile fuel supply device is very important to ensure.

The working principle of the existing oil level sensor is as follows: the oil level sensor is a slide rheostat, the resistance value is controlled by a floater, when the oil level in the oil tank changes, the floater of the oil level sensor can float up and down, the resistance value can change along with the change of the oil level sensor, under the condition that the loading voltage is fixed, the output potential signal changes, the potential signal is reflected on an instrument and is converted into the height of the oil level according to a certain proportion

The existing oil level sensor has the following defects in practical use:

the design of an automobile oil tank is complicated, so that the installation space of an oil level sensor is limited, and the volume of the oil level sensor used in the existing market is large, so that the space occupied by the whole fuel pump assembly is too large, and the structural design of the assembly is difficult;

secondly, the durability of the fuel level sensor is poor due to poor quality and more impurities of fuel used in certain areas;

and thirdly, the conventional oil level sensor adopts a sliding variable resistance mode, has low resistance resolution due to resistor disc printing reasons, generally outputs 30-50 resistances, and has larger calculation error of the endurance mileage of the automobile.

Thus, the prior art fuel level sensor also has a raised place.

Disclosure of Invention

In view of the above-mentioned drawbacks, an object of the present invention is to provide a fuel level sensor with good stability, which is installed in a fuel pump assembly of an automobile fuel supply system and is used for outputting signals of the level of a liquid in a fuel tank, so as to solve the technical problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an oil level sensor comprises a float rod assembly, a rocker arm assembly, a base assembly and a lead assembly, wherein the float rod assembly is arranged on the rocker arm assembly, the rocker arm assembly is arranged on the base assembly, and the lead assembly is arranged on the base assembly; the base assembly comprises a framework assembly and a base, the framework assembly comprises a framework, a Hall chip, two capacitors and three lugs, the three lugs are arranged on the framework, the framework is a sheet body, the framework comprises a through hole and two splayed grooves, each splayed groove comprises a splayed positioning groove formed by four positioning ribs, the two capacitors are arranged on the framework, connecting pins of the capacitors are respectively positioned in the splayed grooves, and the connecting pins of the capacitors are connected with the lugs; the Hall chip is arranged on the framework, penetrates through the through hole and protrudes out of the framework, and the framework is arranged on the base.

According to the preferred embodiment of this application oil level sensor, still include lead wire protecting cover and lead wire protecting cover down, lead wire assemblage includes three power cord, and is three the power cord is connected threely respectively the lug, it is three power cord through connection the upper end of base, go up lead wire protecting cover and lead wire protecting cover down and connect respectively the both sides of the upper end of base.

According to the fuel level sensor of the preferred embodiment of the present application, the float rod assembly comprises a float collar, a float and a float rod, the float is inserted into one end of the float rod and then limited on the float rod by the float collar, and the other end of the float rod is bent by 90 degrees.

According to the oil level sensor of the preferred embodiment of the application, the rocker arm assembly comprises a rocker arm cover, a rocker arm, a retainer ring and two magnets; the rocker arm comprises a main ring body, a connecting ring and a supporting sheet, wherein the connecting ring is arranged on the outer edge of the main ring body, the supporting sheet is arranged on the outer edge of the main ring body and corresponds to the connecting ring, the main ring body is a hollow double-layer annular body, the inner edge of the main ring body comprises a ring body bottom plate, the inner edge of the inner ring of the main ring body comprises two arc-shaped clamping pieces, the check ring is arranged on the inner edge of the outer ring of the main ring body, and the two magnets are arranged between the outer edge of the inner ring of the main ring body and the inner edge of the check ring; one side of the ring body bottom plate is connected with two corresponding first clamping columns, an upper cover through hole is formed in the position, corresponding to the first clamping columns, of the rocker arm cover, and the first clamping columns are inserted into and connected with the upper cover through hole to limit the rocker arm cover on the rocker arm; the support sheet is a sheet body, and one side of the support sheet is connected with at least two corresponding second clamping columns.

According to the technical scheme, the existing series of oil level sensors are improved, and the linear Hall chip is adopted in the designed oil level sensor, so that the overall dimension of a product can be reduced, the rotating radius of a floating rod can be shortened, the structural arrangement is better during the design of a fuel pump assembly, and the design is optimized; in addition, get rid of resistance card and contact structure, adopt the hall response to isolated fuel and hall contact can use in the poor oil of quality, and in addition, hall fuel level sensor output signal is many, can linear output, and the instrument shows that the continuation of the journey mileage can be more accurate, satisfies the accurate refuelling of user, and the safety is gone.

Due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:

the oil level sensor has the advantages that the oil level sensor is small in overall dimension and convenient to install, and can provide convenience for design of a fuel pump assembly;

secondly, the oil level sensor is not affected by oil products and can be used in complex oil products and biological fuel oil; if meet the oil that corrosivity is strong can also increase lug welding lead and go out to carry out the encapsulating technology: assembling a lower lead protecting cover on the base assembly to seal the lower part, pouring glue to overflow the exposed part of the lead, and assembling an upper lead protecting cover after curing to cover the glue material; therefore, the solder points and copper wires can be prevented from being corroded, and the solder can be used in oil products with strong corrosivity;

thirdly, more signals can be output and can be provided for the ECU more clearly and accurately, so that the instrument indication is more detailed, and more accurate fuel oil capacity information is obtained;

fourthly, the production process of the base is simple and easy: after a framework is injection-molded on the lug plate, the Hall chip and the two capacitors are placed in the framework, the electronic element is fixed on the framework by using the positioning ribs of the framework, glue pouring and fixing are not needed to be carried out like sensors of other companies, and then a spot welding process is carried out, so that the electronic element is conducted with the lug plate; the whole is injected to form the base assembly.

Of course, it is not necessary for any particular embodiment of the inventive concept to be implemented to achieve all of the above technical effects at the same time.

Drawings

FIG. 1 is a schematic view of a fuel level sensor according to the present application;

FIG. 2 is a schematic exploded view of the fuel level sensor of the present application;

FIG. 3 is a schematic view of the framework assembly of the present application;

FIG. 4 is a schematic view of the base of the present application;

FIG. 5 is a schematic view of the float stem assembly of the present application exploded away;

FIG. 6 is a schematic view of the rocker arm assembly of the present application exploded away;

FIG. 7 is a schematic view of a rocker arm of the present application;

FIG. 8 is a schematic view of the operation of the fuel level sender of the present application;

FIG. 9 is a schematic view of a glue-pouring location of the present application;

FIG. 10 is a schematic cross-sectional view of the base and rocker arm assembly of the present application.

Detailed Description

Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and so forth have not been described in detail so as not to unnecessarily obscure aspects of the present invention.

Referring to fig. 1 and 2, a schematic diagram of an oil level sensor and an exploded schematic diagram of the oil level sensor in the present application are shown, the oil level sensor in the present application is disposed in an oil tank of an automobile, the oil level sensor includes a float rod assembly 1, a rocker arm assembly 2, a base assembly 4 and a lead assembly 5, the float rod assembly 1 is disposed on the rocker arm assembly 2, the rocker arm assembly 2 is disposed on the base assembly 4, the lead assembly 5 is disposed on the base assembly 4, and a specific working process of the oil level sensor is as follows: as shown in fig. 8, when the vehicle is filled with oil (F), the float drives the float rod assembly to be positioned at the top of the oil tank; when the automobile runs and fuel oil is consumed, the float rod assembly descends along with the descending of the oil level, relevant signals are output to the ECU, and the ECU transmits the relevant signals to the instrument for indication; when the float is at the 1/2 position, the oil tank has half of the gasoline; when the fuel oil in the automobile fuel tank consumes E level, the meter reminds the user to fill the fuel.

Referring to fig. 2, fig. 3 and fig. 4, the base assembly 4 includes a frame assembly and a base 45, the frame assembly includes a frame 41, a hall chip 42, two capacitors 43 and three connection terminals 44, the three connection terminals 44 are disposed on the frame 41, the connection mode of the three connection terminals 44 and the frame 41 is that the three connection terminals 44 are injection-molded to form a fixed connection body of the frame 41 and the three connection terminals 44, as shown in fig. 3, the three connection terminals 44 are arranged side by side on the frame 41 and one end of each connection terminal protrudes out of the frame 41, the frame 41 is a sheet body, the frame 41 includes a through hole 411 and two splayed grooves 412, each splayed groove 412 includes a splayed positioning groove body formed by four positioning ribs, the two capacitors 43 are disposed on the frame 41, in fig. 3, two grooves are formed in the framework 41, the capacitors 43 are arranged in the two grooves, the connecting pins of the capacitors 43 face the splayed grooves 412, the connecting pins of the capacitors 43 are respectively positioned in the splayed grooves 412, the connecting pins of the capacitors 43 are connected with the lugs 44 in a manner that one connecting pin of the capacitors 43 is connected with the same lug 44 (the middle lug 44 in fig. 3), and the other connecting pin of the capacitors 43 is connected with the other two lugs 44 (the lugs 44 on two sides in fig. 3).

In addition, the hall chip 42 is disposed on the frame 41, the hall chip 42 protrudes out of the frame 41 through the through hole 411, two connection pins of the hall chip 42 are disposed on the frame 41, in fig. 3, the two connection pins of the hall chip 42 are disposed in two fixing slots of the frame 41, one connection pin of the hall chip 42 is connected to the middle connection tab 44 in fig. 3 for transmitting information, the frame 41 is disposed on the base 45, the base assembly 4 of the present application is formed by assembling the frame and performing secondary injection molding on the base 45, the advantages of the secondary injection molding include that the hall chip 42 can be fixed at one position, and the position consistency is high; secondly, the Hall chip 42 can be completely wrapped in the plastic and isolated from the fuel oil, so that inaccurate output signals caused by corrosion of the chip by the oil product can be prevented). As shown in fig. 4, the base 45 includes a cylinder 451, and the hall chip 42 passes through the through hole 411, protrudes out of the frame 41, and is coated in the cylinder 451 through secondary injection molding.

According to the processing technology, after the framework 41 is injection-molded on the lug plate 44, the Hall chip 42 and the two capacitors 43 are placed in the framework 41, as shown in FIG. 3, the electronic element is fixed on the framework 41 by using the positioning ribs of the framework 41, glue pouring and fixing are not needed to be carried out like a sensor in the prior art, and then a spot welding technology is carried out, so that the electronic element is conducted with the lug plate; the whole is injection molded to form the base assembly 4.

As shown in fig. 2, the fuel level sensor further comprises an upper lead protecting cover 3 and a lower lead protecting cover 6, the lead assembly 5 comprises three power lines, the three power lines are respectively connected with three lugs 44, the three power lines are connected with the upper end of the base 45 in a penetrating way, the upper lead wire protecting cover 3 and the lower lead wire protecting cover 6 are respectively connected with two sides of the upper end of the base 45, for wrapping the glue-filled end portions of the three power lines, please refer to fig. 9, the three power lines are connected to the three lugs 44 in a hollow environment, in order to ensure the safety of conduction, after connection, a glue filling process is required to achieve the isolation function by using glue, the lower lead protecting cover 6 is firstly inserted into the base 45, reach the sealed effect in bottom and carry out the encapsulating, restriction glue can not down flow out, and after the encapsulating, cover again go up lead wire protecting cover 3 and reach protection and pleasing to the eye effect.

The oil level sensor is not influenced by oil products and can be used in complex oil products and biological fuel oil; if oil products with strong corrosivity meet, the lead wire welding of the terminal block can be increased to carry out glue pouring process, as mentioned above, the base is assembled and assembled with the lower lead wire protective cover 6, the lower part is sealed, glue is poured to overflow the exposed part of the lead wire, and after solidification, the upper lead wire protective cover 3 is assembled to cover the glue material; therefore, the solder points and the copper wires can be prevented from being corroded, and the solder can be used in oil products with strong corrosivity.

As shown in fig. 5, the float rod assembly 1 includes a float collar 11, a float 12 and a float rod 13, the float 12 is inserted into one end of the float rod 13 and then limited on the float rod 13 by the float collar 11, the other end of the float rod 13 is bent by 90 degrees, the 90 degrees are used for connecting the rocker arm assembly 2, and in fig. 2, the end of the float rod assembly 1 facing the rocker arm assembly 2 forms a 90 degrees included angle after passing through an arc transition.

Referring to fig. 6 and 7, the rocker arm assembly 2 includes a rocker arm cover 21, a rocker arm 22, a retainer ring 23 and two magnets 24; the rocker arm 22 comprises a main ring body 221, a connecting ring 222 and a supporting piece 223, wherein the connecting ring 222 is arranged on the outer edge of the main ring body 221, and the supporting piece 223 is arranged on the outer edge of the main ring body 221 and corresponds to the connecting ring 222.

As shown in fig. 7 and 10, the main ring body 221 is a hollow double-layer ring body, the inner edge of the main ring body 221 includes a ring body bottom plate 2211, it can be seen in fig. 10 that the ring body bottom plate 2211 is a connecting surface of the inner ring and the outer ring of the main ring body 221, the inner edge of the inner ring of the main ring body 221 includes two arc-shaped clamping plates 2212, two arc-shaped clamping plates 2212 are correspondingly disposed with a gap between two ends, a bottom plate through hole is opened at the center of the ring body bottom plate 2211, the retainer ring 23 is disposed at the inner edge of the outer ring of the main ring body 221, two magnets 24 are disposed between the outer edge of the inner ring of the main ring body 221 and the inner edge of the retainer ring 23, after assembly, the two magnets 24 are clamped to the main ring body 221, as shown in fig. 10, the two magnets 24 are clamped between the inner ring of the main ring body 221 and the inner edge of the retainer ring 23, and the two magnets 24 clamped can deflect, thereby changing the information transmitted by the Hall chip 42; referring to fig. 2, 6, 7 and 9, as assembled, the cylinder body 451 is inserted into the rocker arm assembly 2, and the end portion 4511 of the cylinder body 451 stays at a position that extends through the two arc-shaped cards 2212 but does not protrude from the ring body bottom plate 2211, i.e., the position of the end portion 4511 between the arc-shaped cards 2212 and the ring body bottom plate 2211; the hall chips 42 correspond to the two magnets 24, so that the hall chips 42 in the cylindrical body 451 sense the deflection of the magnets 24.

In fig. 4, the end portion 4511 of the cylinder body 451 is an elongated piece, and in fig. 10, after the end portion 4511 passes through the gap between the two arc-shaped cards 2212, the end portion 4511 rotates 90 degrees to reach the position between the arc-shaped card 2212 and the rocker arm cover 21 at the oil tank 1/2, and the operating angle of the rocker arm 22 is 60 degrees left and right, so that the rocker arm 22 cannot fall out of the end portion 4511, and the connection effectiveness of the two is ensured. In addition, for the stability of connection, a connecting ring portion 452 is designed on the base 45, the end surface of the connecting ring portion 452 is an arc surface, the height of the end surface of the connecting ring portion 452 is designed, so that the rocker arm 22 can be supported when slightly deflected without influencing the normal motion of the rocker arm 22, and a radially protruding ring cover is arranged at a position of the rocker arm 22 corresponding to the connecting ring portion 452, so that the rocker arm can contact with the end surface of the connecting ring portion 452 to maintain the stability of motion when deflected.

As shown in fig. 10, the retaining ring 23 is engaged with the inside of the main ring body 221, the two magnets 24 are covered by the retaining ring 23, and the retaining ring 23 serves to isolate magnetism, thereby preventing the influence of external magnetism on the hall chip 42 and the influence of the magnets inside the sensor on external parts, and effectively improving the accuracy of transmission of the hall chip 42. Since the hall chip 42 outputs a voltage signal in response to a change in magnetic density of the magnet, the smaller the external disturbance, the higher the output voltage signal.

In addition, two corresponding first clamping columns 25 are connected to one side of the ring body bottom plate 2211, in fig. 6 and 7, one end of each first clamping column 25 is connected to the ring body bottom plate 2211, the other end of each first clamping column 25 comprises a convex clamping protrusion, and the two corresponding clamping protrusions form a limiting function for limiting an object entering the first clamping column 25 to be prevented from falling off.

In addition, in fig. 7, the support piece 223 is a single body, one side of the support piece 223 is connected to at least two corresponding second clamping posts 26, in the embodiment of the present application, the number of the second clamping posts 26 is two, but it cannot be used to limit the present application, and more than two or less than one, as long as the purpose of stable connection can be achieved, the protection range of the present application should be all reached, one end of the second clamping post 26 is connected to the support piece 223, the other end of the second clamping post 26 includes a protruding clamping protrusion, and the two corresponding clamping protrusions form a limiting function for limiting an object entering the second clamping post 26 from falling off, so that the float rod 13 is limited in the second clamping post 26 from falling off in the present application.

Referring to fig. 1 and 7, the float rod assembly 1 is disposed on the rocker arm assembly 2 in such a manner that the 90-degree bent end of the float rod 13 is inserted into the connecting ring 222, and the stem of the float rod 13 is clamped into the first clamping column 25 and the second clamping column 26 to form a stable connection; in fig. 7, the center of the connecting ring 222 is aligned with the center points of the first and second clamping posts 25 and 26, so that the float rod 13 can be stably engaged; in addition, the center of the through hole of the bottom plate is also on the straight line, so that the float rod 13 can drive the rocker arm assembly 2 to stably rotate when moving up and down.

In summary, due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:

the oil level sensor has the advantages that the oil level sensor is small in overall dimension and convenient to install, and can provide convenience for design of a fuel pump assembly;

secondly, the oil level sensor is not affected by oil products and can be used in complex oil products and biological fuel oil; if meet the oil that corrosivity is strong can also increase lug welding lead and go out to carry out the encapsulating technology: assembling a lower lead protecting cover on the base assembly to seal the lower part, pouring glue to overflow the exposed part of the lead, and assembling an upper lead protecting cover after curing to cover the glue material; therefore, the solder points and copper wires can be prevented from being corroded, and the solder can be used in oil products with strong corrosivity;

thirdly, more signals can be output and can be provided for the ECU more clearly and accurately, so that the instrument indication is more detailed, and more accurate fuel oil capacity information is obtained;

fourthly, the production process of the base is simple and easy: after a framework is injection-molded on the lug plate, the Hall chip and the two capacitors are placed in the framework, the electronic element is fixed on the framework by using the positioning ribs of the framework, glue pouring and fixing are not needed to be carried out like sensors of other companies, and then a spot welding process is carried out, so that the electronic element is conducted with the lug plate; the whole is injected to form the base assembly.

The preferred embodiments of the invention are provided solely to aid in the illustration of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents. The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and it is intended that all equivalent variations and modifications of the present invention as those skilled in the art can be made without departing from the spirit and scope of the present invention.