阅读说明：本技术 一种摆杆式霍尔油位传感器 (Swing rod type Hall oil level sensor ) 是由 钱剑东 朱林根 张凯 于 2021-01-08 设计创作，主要内容包括：本发明公开了一种摆杆式霍尔油位传感器,包括转轴组件、钢丝摆杆、浮球体组件、磁钢组件、感应模块、线路板壳体、法兰底座、法兰垫片、端盖。本发明采用一体成型的嵌入式腔体,将感应模块嵌入油箱内,感应模块和油箱外大气连通,并不和油箱内部连通,实现非接触式结构；可扩展性高,感应模块可以通过更换其他同系列不同规格的IC,变化输出形式,并且可通过加装单片机编程智能型,实现后期编程。(The invention discloses a swing rod type Hall oil level sensor which comprises a rotating shaft assembly, a steel wire swing rod, a floating ball body assembly, a magnetic steel assembly, an induction module, a circuit board shell, a flange base, a flange gasket and an end cover. The induction module is embedded into the oil tank by adopting the integrally formed embedded cavity, and is communicated with the atmosphere outside the oil tank and not communicated with the inside of the oil tank, so that a non-contact structure is realized; the expandability is high, the induction module can change the output form by replacing other ICs with the same series and different specifications, and the later-stage programming can be realized by additionally installing a singlechip to program the intelligent type.)

1. The oscillating bar type Hall oil level sensor is characterized by comprising a rotating shaft assembly, a steel wire oscillating bar (13), a floating ball body assembly, magnetic steel (9), an induction module (2), a circuit board shell (19), a flange base (16), a flange gasket (1) and an end cover (3), wherein the circuit board shell (19) and the flange base (16) are integrally formed, a cavity is formed in the circuit board shell (19), and the induction module (2) is installed in the cavity;

the rotating shaft assembly comprises a rotating shaft seat (4), a steel wire rotating shaft (5), a copper alloy shaft sleeve, a first antifriction washer (7) and a second antifriction washer (8), the rotating shaft seat (4) is fixedly connected to the circuit board shell (19), the copper alloy shaft sleeve is embedded in a shaft hole of the rotating shaft seat (4), the first antifriction washer (7) and the second antifriction washer (8) are installed on an outer ring of the steel wire rotating shaft (5) in a matched mode, the steel wire rotating shaft (5) and the copper alloy shaft sleeve in the rotating shaft seat (4) are installed in a matched mode, an arc-shaped convex block (4-1) is arranged on the outer end face of the rotating shaft seat (4) along the axial direction, a fan-shaped groove (4-2) is formed in the position above the arc-shaped convex block (4-1) and used for limiting the steel wire oscillating bar (13), a central shaft hole (5-1) is formed in the center of the steel, the front end of the steel wire rotating shaft is provided with an open U-shaped groove (5-2) and is communicated with a central shaft hole (5-1), the tail end of the steel wire swing rod (13) penetrates into the central shaft hole (5-1) of the steel wire rotating shaft (5) and is embedded in the U-shaped groove (5-2) in a bending mode, the front end of the steel wire rotating shaft (5) is located in the arc-shaped bump (4-1), and the steel wire swing rod (13) 1 and the fan-shaped groove (4-2) are in limit fit operation;

the tail end of the steel wire rotating shaft (5) penetrates through the shaft hole of the rotating shaft seat (4), the magnetic steel (9) is installed at the tail end of the steel wire rotating shaft (5) in a press fit mode, and the magnetic steel (9) is matched with the induction module (2) located in the cavity of the circuit board shell (19) to work;

the flange gasket (1) and the flange base (16) are respectively provided with a plurality of fastening holes (16-1) and are fixedly connected to the side wall of the oil tank through screws, the mounting end face of the flange base (16) is tightly attached to the side wall of the oil tank, the flange gasket (1) is located on the other end face of the flange base (16), the end cover (3) is bonded to the flange gasket (1) through epoxy glue, and the side wall of the end cover (3) is provided with an opening for passing through an output lead (17) of the induction module (2).

2. The oscillating rod type Hall oil level sensor according to claim 1, wherein the steel wire rotating shaft (5) is provided with an annular clamp spring groove (5-3) for clamping a shaft check ring (11), and a copper gasket (20) is arranged between the shaft check ring (11) and the inner end surface of the rotating shaft seat (4).

3. The oscillating rod type hall oil level sensor according to claim 2, wherein the angle of the fan-shaped groove (4-2) is 108 °.

4. The oscillating bar type Hall oil level sensor according to claim 3, wherein the floating ball body assembly comprises a floating ball body (6), an O-shaped sealing ring (12) and a plum blossom-shaped check ring (14), a shaft hole is formed in the center of the floating ball body (6), the top end of the steel wire oscillating bar (13) sequentially penetrates through the shaft hole in the center of the floating ball body (6), the O-shaped sealing ring (12) and the plum blossom-shaped check ring (14), and the plum blossom-shaped check ring (14) is provided with a pawl structure and is fastened with the top end of the steel wire oscillating bar (13) in a matched manner.

5. The oscillating bar type Hall oil level sensor according to claim 4, wherein the front end side of the steel wire rotating shaft (5) is provided with two first threaded holes (5-3), the two first threaded holes (5-3) are symmetrically arranged at two ends of the opening of the U-shaped groove (5-2), the two first threaded holes (5-3) are communicated with the shaft hole of the steel wire rotating shaft (5), and two fastening screws (10) are respectively matched and installed with the two first threaded holes (5-3) for fixing the steel wire oscillating bar (13).

6. The oscillating bar type Hall oil level sensor according to claim 5, wherein the sensing module (2) comprises a single-shaft magnetoresistive angle sensor (2-1) and a circuit board (2-2), the single-shaft magnetoresistive angle sensor (2-1) is connected to the circuit board (2-2) and cooperates with the magnetic steel (9) for sensing, the output end of the circuit board (2-2) is connected with an output lead (17), and the output lead (17) passes through an opening on the side wall of the end cover (3) and is connected with a connector (18).

7. The rocker-type hall fuel level sensor according to claim 6, wherein the output lead (17) passing through the opening is provided with a harness protection housing.

8. The oscillating rod type hall oil level sensor according to claim 7, wherein the circuit board housing (19) comprises a first housing (19-1) and a second housing (19-2) which are integrally formed; the length of the first shell (19-1) is longer than that of the second shell (19-2), the second shell (19-2) is arranged on the front end face of the first shell (19-1), and a rotating shaft seat mounting position (19-3) is formed at the top end of the first shell (19-1); second threaded holes (19-4) are formed in the upper side and the lower side of the second shell (19-2) respectively, fixing holes (4-3) are formed in the upper side and the lower side of the rotating shaft seat (4) and are fixedly connected with the second threaded holes (19-4) in the upper side and the lower side of the second shell through self-tapping screws (15) respectively, the rotating shaft seat (4) is located at the rotating shaft seat mounting position (19-3), cavities are formed in the first shell (19-1) and the second shell (19-2), and the circuit board (2-2) is mounted in the cavity of the first shell (19-1).

9. The oscillating rod type hall oil level sensor according to claim 8, wherein the first housing (19-1) is of a U-shaped configuration.

10. The rocker-type hall fuel level sensor according to claim 8, wherein the first and second friction reducing washers (7, 8) are both teflon friction reducing washers.

Technical Field

The invention relates to a swing rod type Hall oil level sensor, and belongs to the technical field of oil level sensors.

Background

The fuel level sensor is mounted on engineering machinery (an excavator, a loader, a bulldozer, a forklift, a crane, a road surface machine, an agricultural machine and the like) with high working strength and severe working conditions. The vibration intensity is very high, the temperature change of the working environment is severe, and the quality guarantee time required by manufacturers is long.

At present, the widely used fuel level sensors are mostly contact type fuel level sensors, electronic components such as circuit boards and sensors are contacted with fuel for a long time, corrosion is easy to occur, the service life of the sensors is influenced, and the requirements on the application environment of the sensors are also higher.

In the existing fuel level sensors, although the electronic components are encapsulated by the shell, the shell still has a connecting gap, and the gap is also immersed in the fuel for a long time, so that the possibility of oil leakage still exists. In addition, the output lead of the electronic component still needs to penetrate out of an information module immersed in oil, then penetrates out of the sensor mounting surface and is guided to the outside, and the possibility of oil leakage exists.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the swing rod type Hall oil level sensor, which is characterized in that an electronic element is completely encapsulated in an integrally formed shell, so that a real non-contact structure is realized, the product structure is simplified, the realization of modular production is facilitated, and the production efficiency is improved.

The invention mainly adopts the technical scheme that:

a swing rod type Hall oil level sensor comprises a rotating shaft assembly, a steel wire swing rod 13, a floating ball body assembly, magnetic steel 9, an induction module 2, a circuit board shell 19, a flange base 16, a flange gasket 1 and an end cover 3, wherein the circuit board shell 19 and the flange base 16 are integrally formed, a cavity is formed in the circuit board shell 19, and the induction module 2 is installed in the cavity;

the rotating shaft assembly comprises a rotating shaft seat 4, a steel wire rotating shaft 5, a copper alloy shaft sleeve, a first antifriction washer 7 and a second antifriction washer 8, the rotating shaft seat 4 is fixedly connected on the circuit board shell 19, the copper alloy shaft sleeve is embedded and arranged in a shaft hole of the rotating shaft seat 4, the first antifriction washer 7 and the second antifriction washer 8 are installed on an outer ring of the steel wire rotating shaft 5 in a matching way, the steel wire rotating shaft 5 is installed in a matching way with the copper alloy shaft sleeve in the rotating shaft seat 4, an arc-shaped bump 4-1 is arranged on the outer end face of the rotating shaft seat 4 along the axial direction, a fan-shaped groove 4-2 is arranged above the arc-shaped bump 4-1 and used for limiting a steel wire oscillating bar 13, a central shaft hole 5-1 is arranged in the center of the steel wire rotating shaft 5, an open U-shaped groove 5-2 is arranged at the front end of the steel wire rotating, the tail end of the steel wire swing rod 13 penetrates into a central shaft hole 5-1 of the steel wire rotating shaft 5 and is bent and embedded in the U-shaped groove 5-2, the front end of the steel wire rotating shaft 5 is positioned in the arc-shaped bump 4-1, and the steel wire swing rod 13 and the fan-shaped groove 4-2 work in a limiting and matching mode;

the tail end of the steel wire rotating shaft 5 penetrates through the shaft hole of the rotating shaft seat 4, the magnetic steel 9 is installed at the tail end of the steel wire rotating shaft 5 in a press fit mode, and the magnetic steel 9 is matched with the induction module 2 located in the cavity of the circuit board shell 19 to work;

the flange gasket 1 and the flange base 16 are provided with a plurality of fastening holes 16-1 and are fastened and connected to the side wall of the oil tank through screws, the mounting end face of the flange base 16 is tightly attached to the side wall of the oil tank, the flange gasket 1 is located on the other end face of the flange base 16, the end cover 3 is bonded to the flange gasket 1 through epoxy glue, and the side wall of the end cover 3 is provided with an opening for passing through an output lead 17 of the induction module 2.

Preferably, the steel wire rotating shaft 5 is provided with an annular clamp spring groove 5-4 for clamping a shaft check ring 11, and a copper gasket 20 is arranged between the shaft check ring 11 and the inner end face of the rotating shaft seat 4.

Preferably, the angle of the sector grooves 4-2 is 108 °.

Preferably, the floater body subassembly includes floater body 6, O type sealing washer 12 and plum blossom retaining ring 14, floater body 6 center is equipped with the shaft hole, the top of steel wire pendulum rod 13 passes in proper order shaft hole, O type sealing washer 12 and plum blossom retaining ring 14 at floater body 6 center, plum blossom retaining ring 14 is equipped with the pawl structure, with the cooperation of steel wire pendulum rod 13 top is fastened.

Preferably, two first threaded holes 5-3 are formed in the side face of the front end of the steel wire rotating shaft 5, the two first threaded holes 5-3 are symmetrically formed in two ends of an opening of the U-shaped groove 5-2, the two first threaded holes 5-3 are communicated with a shaft hole of the steel wire rotating shaft 5, and two fastening screws 10 are installed in a matched mode with the two first threaded holes 5-3 respectively and used for fixing the steel wire swing rod 13.

Preferably, the induction module 2 comprises a single-shaft magnetic resistance angle sensor 2-1 and a circuit board 2-2, the single-shaft magnetic resistance angle sensor 2-1 is connected to the circuit board 2-2 and works in cooperation with the magnetic steel 9, the output end of the circuit board 2-2 is connected with an output lead 17, and the output lead 17 penetrates through an opening in the side wall of the end cover 3 and is connected with a connector 18.

Preferably, a harness protective housing is provided on the output wire 17 passing through the opening.

Preferably, the circuit board housing 19 includes a first housing 19-1 and a second housing 19-2, which are integrally formed; the length of the first shell 19-1 is longer than that of the second shell 19-2, the second shell 19-2 is arranged on the front end face of the first shell 19-1, and a shaft seat mounting position 19-3 is formed at the top end of the first shell; the upper side and the lower side of the second shell 19-2 are respectively provided with a second threaded hole 19-4, the upper side and the lower side of the rotating shaft seat 4 are provided with a fixing hole 4-3 and are respectively fixedly connected with the second threaded holes 19-4 on the upper side and the lower side of the second shell through self-tapping screws 15, the rotating shaft seat 4 is positioned at the rotating shaft seat mounting position 19-3, the first shell 19-1 and the second shell 19-2 are both internally provided with a cavity, and the circuit board 2-2 is mounted in the cavity of the first shell 19-1.

Preferably, the first housing 19-1 is of a U-shaped configuration.

Preferably, the first and second friction reducing washers 7, 8 are both polytetrafluoroethylene friction reducing washers.

Has the advantages that: compared with the prior art, the invention provides a swing rod type Hall oil level sensor which has the following advantages:

(1) the induction module is embedded into the oil tank by designing the integrally formed embedded cavity, and is communicated with the atmosphere outside the oil tank and not communicated with the inside of the oil tank, so that a non-contact structure is realized;

(2) the output lead wire can be directly led out from the end cover without wall penetration, and the risk of oil leakage does not exist;

(3) the induction module adopts a magnetic resistance type induction chip, belongs to an integrated circuit, has strong impact resistance and vibration, is convenient for integrated modular production, and improves the production efficiency;

(4) the single-shaft magnetoresistive angle sensor is an active sensor, generally comprises 3 wires, needs a power supply, outputs voltage quantity analog quantity output, and can be changed into current output, digital quantity output or communication port output through simple conversion;

(5) the single-shaft magnetic resistance angle sensor is used for continuous analog quantity output, and the magnetic induction precision is high;

(6) the invention has wide application range and strong environmental applicability, can be used in the conventional gasoline environment (gasoline medium, oil detection stroke is smaller) and can also be used in the environment with severe working conditions (such as diesel medium, oil detection stroke is larger);

(7) most parts in the invention are in modular design, thus reducing the number of parts, facilitating production and installation and improving working efficiency;

(8) the circuit accommodating cavity has surplus, so that the singlechip and other electrical elements can be conveniently modified in the later period;

(9) the invention has high expandability, the induction module can change the output form by replacing other ICs with the same series and different specifications, and can realize the later programming by additionally installing a singlechip to program the intelligent type.

Drawings

FIG. 1 is an exploded schematic view of an integrated apparatus 1 of the present invention;

FIG. 2 is an exploded schematic view of the overall apparatus of the present invention 2;

FIG. 3 is a partial schematic view of A in FIG. 2;

fig. 4 is a schematic view of the overall structure of the present invention.

In the figure: a flange gasket 1, an induction module 2, a single-shaft magnetic resistance angle sensor 2-1, a circuit board 2-2, an end cover 3, a rotating shaft seat 4, an arc-shaped bump 4-1, a sector groove 4-2, a fixing hole 4-3, a steel wire rotating shaft 5, a central shaft hole 5-1, a U-shaped groove 5-2, a first threaded hole 5-3, a clamp spring groove 5-4, a floating ball body 6, a first antifriction washer 7 and a second antifriction washer 8, the device comprises magnetic steel 9, fastening screws 10, a shaft retainer ring 11, an O-shaped seal ring 12, a steel wire swing rod 13, a plum blossom retainer ring 14, a self-tapping screw 15, a flange base 16, a fastening hole 16-1, an output lead 17, a connector 18, a circuit board shell 19, a first shell 19-1, a second shell 19-2, a rotating shaft base mounting position 19-3, a second threaded hole 19-4 and a copper gasket 20.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

A swing rod type Hall oil level sensor comprises a rotating shaft assembly, a steel wire swing rod 13, a floating ball body assembly, magnetic steel 9, an induction module 2, a circuit board shell 19, a flange base 16, a flange gasket 1 and an end cover 3, wherein the circuit board shell 19 and the flange base 16 are integrally formed, a cavity is formed in the circuit board shell 19, and the induction module 2 is installed in the cavity;

the rotating shaft assembly comprises a rotating shaft seat 4, a steel wire rotating shaft 5, a copper alloy shaft sleeve, a first antifriction washer 7 and a second antifriction washer 8, the rotating shaft seat 4 is fixedly connected on the circuit board shell 19, the copper alloy shaft sleeve is embedded and arranged in a shaft hole of the rotating shaft seat 4, the first antifriction washer 7 and the second antifriction washer 8 are installed on an outer ring of the steel wire rotating shaft 5 in a matching way, the steel wire rotating shaft 5 is installed in a matching way with the copper alloy shaft sleeve in the rotating shaft seat 4, an arc-shaped bump 4-1 is arranged on the outer end face of the rotating shaft seat 4 along the axial direction, a fan-shaped groove 4-2 is arranged above the arc-shaped bump 4-1 and used for limiting a steel wire oscillating bar 13, a central shaft hole 5-1 is arranged in the center of the steel wire rotating shaft 5, an open U-shaped groove 5-2 is arranged at the front end of the steel wire rotating, the tail end of the steel wire swing rod 13 penetrates into a central shaft hole 5-1 of the steel wire rotating shaft 5 and is bent and embedded in the U-shaped groove 5-2, the front end of the steel wire rotating shaft 5 is positioned in the arc-shaped bump 4-1, and the steel wire swing rod 13 and the fan-shaped groove 4-2 work in a limiting and matching mode;

the tail end of the steel wire rotating shaft 5 penetrates through the shaft hole of the rotating shaft seat 4, the magnetic steel 9 is installed at the tail end of the steel wire rotating shaft 5 in a press fit mode, and the magnetic steel 9 is matched with the induction module 2 located in the cavity of the circuit board shell 19 to work;

the flange gasket 1 and the flange base 16 are provided with a plurality of fastening holes 16-1 and are fastened and connected to the side wall of the oil tank through screws, the mounting end face of the flange base 16 is tightly attached to the side wall of the oil tank, the flange gasket 1 is located on the other end face of the flange base 16, the end cover 3 is bonded to the flange gasket 1 through epoxy glue, and the side wall of the end cover 3 is provided with an opening for passing through an output lead 17 of the induction module 2. The number of the fastening holes in the present invention can be set according to actual conditions, and for example, 4 fastening holes can be uniformly formed.

Preferably, the steel wire rotating shaft 5 is provided with an annular clamp spring groove 5-4 for clamping a shaft check ring 11, and a copper gasket 20 is arranged between the shaft check ring 11 and the inner end face of the rotating shaft seat 4.

Preferably, the angle of the sector grooves 4-2 is 108 °.

Preferably, the floater body subassembly includes floater body 6, O type sealing washer 12 and plum blossom retaining ring 14, floater body 6 center is equipped with the shaft hole, the top of steel wire pendulum rod 13 passes in proper order shaft hole, O type sealing washer 12 and plum blossom retaining ring 14 at floater body 6 center, plum blossom retaining ring 14 is equipped with the pawl structure, with the cooperation of steel wire pendulum rod 13 top is fastened.

Preferably, two first threaded holes 5-3 are formed in the side face of the front end of the steel wire rotating shaft 5, the two first threaded holes 5-3 are symmetrically formed in two ends of an opening of the U-shaped groove 5-2, the two first threaded holes 5-3 are communicated with a shaft hole of the steel wire rotating shaft 5, and two fastening screws 10 are installed in a matched mode with the two first threaded holes 5-3 respectively and used for fixing the steel wire swing rod 13.

Preferably, the induction module 2 comprises a single-shaft magnetic resistance angle sensor 2-1 and a circuit board 2-2, the single-shaft magnetic resistance angle sensor 2-1 is connected to the circuit board 2-2 and works in cooperation with the magnetic steel 9, the output end of the circuit board 2-2 is connected with an output lead 17, and the output lead 17 penetrates through an opening in the side wall of the end cover 3 and is connected with a connector 18.

Preferably, a harness protective housing is provided on the output wire 17 passing through the opening.

Preferably, the circuit board housing 19 includes a first housing 19-1 and a second housing 19-2, which are integrally formed; the length of the first shell 19-1 is longer than that of the second shell 19-2, the second shell 19-2 is arranged on the front end face of the first shell 19-1, and a shaft seat mounting position 19-3 is formed at the top end of the first shell; the upper side and the lower side of the second shell 19-2 are respectively provided with a second threaded hole 19-4, the upper side and the lower side of the rotating shaft seat 4 are provided with a fixing hole 4-3 and are respectively fixedly connected with the second threaded holes 19-4 on the upper side and the lower side of the second shell through self-tapping screws 15, the rotating shaft seat 4 is positioned at the rotating shaft seat mounting position 19-3, the first shell 19-1 and the second shell 19-2 are both internally provided with a cavity, and the circuit board 2-2 is mounted in the cavity of the first shell 19-1.

Preferably, the first housing 19-1 is of a U-shaped configuration.

Preferably, the first and second friction reducing washers 7, 8 are both polytetrafluoroethylene friction reducing washers.

In the invention, the copper alloy shaft sleeve is embedded in the shaft hole in the rotating shaft seat 4 in an injection molding mode and is used for being matched and installed with the steel wire rotating shaft 5.

In the invention, the retaining ring 11 for the shaft is radially clamped in the clamp spring groove 5-4 to prevent the steel wire rotating shaft 5 from sliding out of the copper alloy shaft sleeve along the axial direction.

In the invention, the magnetic steel 9 and the steel wire rotating shaft 5 are installed in a press fit mode and are bonded by glue.

The installation method of the invention comprises the following steps:

the circuit board shell 19 is inserted into the oil tank from the opening of the side wall of the oil tank from outside to inside, the mounting end face of the flange base 16 is tightly attached to the outer wall of the oil tank, and then screws sequentially penetrate through the flange gasket 1 and the fastening holes 16-1 formed in the flange base 16 to be fastened and connected with the side wall of the oil tank. And finally, fixing the rotating shaft seat 4 on a rotating shaft seat mounting position 19-3 on the circuit board shell 19 by adopting a self-tapping screw 15, namely completing the mounting. Wherein, the rotating shaft assembly, the steel wire swing rod 13 and the floating ball body assembly are already installed on the rotating shaft seat 4 in a matching way.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.