Sealed wet-type built-in oil level sensor

Abstract

The utility model relates to the field of oil level sensors, in particular to a sealed wet-type built-in oil level sensor which comprises a framework, an outer rocker arm rotationally connected to the framework, a floater assembly fixed to the outer rocker arm, a first sealing ring arranged between the outer rocker arm and the framework, an inner rocker arm connected to the outer rocker arm, and a reed assembly fixed to the inner rocker arm. A first sealing ring is arranged between the outer rocker arm and the framework, the outer rocker arm is rotatably connected with the framework, a reed assembly is arranged between the outer rocker arm and the framework, the reed assembly is connected with a resistor disc, the resistor disc is connected with a terminal wiring harness assembly, and the framework is connected with a cover plate. Gasoline is well prevented from entering the framework to corrode and damage a reed assembly, a resistor disc, a terminal wire harness assembly and the like in the framework, the gasoline-resistant resistor can be applied to ethanol gasoline above E85, the service life is long, the safety performance is high, the framework is filled with lubricating oil, abrasion of parts in the framework in the working process is greatly reduced, and the service life of the gasoline-resistant resistor is prolonged. And the oil level sensor is well protected.

Description

Technical Field

[0001] The utility model relates to the field of oil level sensors, in particular to a sealed wet type built-in oil level sensor. Background Art

[0002] An oil level sensor is a device or equipment used to measure the oil level in a liquid (usually fuel). It can monitor the height or level of the liquid and convert this information into an electrical signal or other form of output for monitoring and controlling the storage, supply, or use process of the liquid. It is usually applied to various types of liquid storage and transportation equipment, such as automobiles, ships, generators, oil storage tanks, and industrial equipment.

[0003] The patent with the application number CN202023211762.6 discloses an oil level sensor. The rocker arm assembly of this oil level sensor consists of a rocker arm cover, a rocker arm, a retaining ring, and two magnets. In this way, when the oil level sensor is placed in the fuel tank for a long time, gasoline is very easy to seep into the inside of the skeleton and damage the components inside the skeleton. Especially for gasoline with a high ethanol content, once gasoline with a high ethanol content seeps into the inside of the skeleton, it is very easy to corrode the components inside the skeleton, thereby causing the oil level sensor to malfunction, increasing the cost of maintenance or replacement, and at the same time posing a great safety hazard. Therefore, there is an urgent need for an oil level sensor with good sealing performance and long service life. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a sealed wet type built-in oil level sensor, which solves the problems existing in the prior art. The utility model sets a first sealing ring between the outer rocker arm and the skeleton, which seals the rotatably connected outer rocker arm and the skeleton well, and effectively prevents gasoline from entering the inside of the skeleton and damaging the components inside the skeleton. This oil level sensor can be applied to gasoline with a very high ethanol content, has a long service life, and high safety performance.

[0006] (2) Technical Solutions

[0007] To achieve the above purpose, the utility model provides the following technical solutions: A sealed wet type built-in oil level sensor includes a skeleton, an outer rocker arm is rotatably connected to the skeleton, a float assembly is fixed on the outer rocker arm, a first sealing ring is provided between the outer rocker arm and the skeleton, the outer rocker arm is connected to an inner rocker arm, a reed assembly is fixed on the inner rocker arm, the reed assembly is connected to a resistance sheet, the resistance sheet is connected to a terminal harness assembly, and a cover plate is connected to the skeleton.

[0008] Preferably, the outer rocker arm includes an outer rocker arm body and a rotating shaft fixedly connected to the outer rocker arm body. The rotating shaft includes a first rotating shaft, a second rotating shaft is fixedly connected to the first rotating shaft, and a connecting portion connected to the inner rocker arm is fixed on the second rotating shaft. A first through hole matching the first rotating shaft is provided on the skeleton. The diameter of the first rotating shaft is greater than that of the second rotating shaft, and a first sealing ring is sleeved on the second rotating shaft.

[0009] Preferably, the first sealing ring includes a dynamic sealing portion sleeved on the second rotating shaft, and a static sealing portion is fixed on the dynamic sealing portion.

[0010] Preferably, the float assembly includes a float, one end of a float connecting rod is fixed to the float, and the other end of the float connecting rod is fixed to the outer rocker arm.

[0011] Preferably, a reed assembly is riveted on the inner rocker arm through a rivet.

[0012] Preferably, the terminal wire harness assembly includes a plurality of terminals inserted on a resistance sheet. A wire is fixed to the lower end of the terminal. A plastic part wraps the connection part of the terminal and the wire. A second sealing ring is provided at the junction of the terminal and the plastic part. A second through hole for the terminal to pass through is provided at the bottom of the skeleton.

[0013] Preferably, 3 terminals are provided.

[0014] Preferably, lubricating grease is applied to the part of the second rotating shaft in contact with the first sealing ring.

[0015] Preferably, lubricating oil is injected into the skeleton.

[0016] Preferably, the part of the float connecting rod fixed to the skeleton is set as a 7-shaped connecting rod. A blind hole is axially opened inward in the rotating shaft, a cross bar of the 7-shaped connecting rod is fixed in the blind hole, and a vertical bar of the 7-shaped connecting rod is stuck in a plurality of arc-shaped limiting blocks arranged alternately on the outer rocker arm body.

[0017] (III) Beneficial effects

[0018] 1. By arranging the first sealing ring between the outer rocker arm and the skeleton, the utility model seals the rotatably connected outer rocker arm and skeleton well, effectively preventing gasoline from entering the interior of the skeleton and corroding and damaging components such as the reed assembly, resistance sheet, and terminal wire harness assembly inside the skeleton. It can be applied to ethanol gasoline with an ethanol content above E85, has a long service life and high safety performance;

[0019] 2. The present utility model realizes good sealing with the inner wall of the first through hole by setting the first sealing ring to be composed of a dynamic sealing part and a static sealing part, wherein the static sealing part is in interference fit with the inner wall of the first through hole. The inner wall of the dynamic sealing part is in interference fit with the second rotating shaft. Thus, when the second rotating shaft rotates along the inner ring of the dynamic sealing part, good sealing between the two is also achieved. The double-layer sealing effectively blocks gasoline from seeping into the interior of the skeleton and damaging the components inside the skeleton. Lubricating grease is applied to the part of the second rotating shaft in contact with the first sealing ring, which greatly reduces the rotation resistance of the second rotating shaft and facilitates the normal rotation of the second rotating shaft;

[0020] 3. The present utility model further improves the sealing performance inside the skeleton through the setting of the second sealing ring, and at the same time enhances the sealing performance inside the plastic part, providing good protection for the connection between the terminal and the wire;

[0021] 4. By filling lubricating oil inside the skeleton, the present utility model greatly reduces the wear of the components inside the skeleton during the working process, transforms the traditional dry oil level sensor into a wet oil level sensor, provides good protection for the oil level sensor, and greatly increases the service life of the oil level sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall schematic diagram of the present utility model.

[0023] Figure 2 is the present utility model Figure 1 exploded view after removing the float assembly.

[0024] Figure 3 is the overall schematic diagram of the outer rocker arm of the present utility model.

[0025] Figure 4 is the overall schematic diagram of the outer rocker arm of the present utility model.

[0026] Figure 5 is the overall schematic diagram of the skeleton of the present utility model.

[0027] Figure 6 is the overall schematic diagram of the first sealing ring of the present utility model.

[0028] Figure 7 is the overall schematic diagram of the float assembly of the present utility model.

[0029] Figure 8 is the schematic diagram of the inner rocker arm and the reed assembly of the present utility model.

[0030] Figure 9 is the present utility model Figure 2 schematic diagram after removing the skeleton and the cover plate.

[0031] Figure 10 This is the overall schematic diagram of the float connecting rod of the present utility model.

[0032] Figure 11 This is the schematic diagram of the 7-shaped connecting rod of the present utility model.

[0033] Figure 12 This is the schematic diagram of the outer rocker arm of the present utility model.

[0034] In the figure: 1 - skeleton, 2 - outer rocker arm, 3 - float assembly, 4 - first sealing ring, 5 - inner rocker arm, 6 - reed assembly, 7 - resistance sheet, 8 - terminal wire harness assembly, 9 - cover plate, 10 - outer rocker arm body, 11 - rotating shaft, 12 - first rotating shaft, 13 - second rotating shaft, 14 - connecting part, 15 - through hole, 16 - dynamic sealing part, 17 - static sealing part, 18 - float, 19 - float connecting rod, 20 - rivet, 21 - terminal, 22 - wire, 23 - plastic part, 24 - second sealing ring, 25 - second through hole, 26 - 7-shaped connecting rod, 27 - blind hole, 28 - cross bar, 29 - vertical bar, 30 - arc-shaped limiting block. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Figure 1-12

[0036] ​The utility model provides a technical solution: a sealed wet type built-in oil level sensor, which includes a skeleton 1, an outer rocker arm 2 is rotatably connected to the skeleton 1, a float assembly 3 is fixed on the outer rocker arm 2, a first sealing ring 4 is arranged between the outer rocker arm 2 and the skeleton 1, the outer rocker arm 2 is connected with an inner rocker arm 5, a reed assembly 6 is fixed on the inner rocker arm 5, the reed assembly 6 is connected with a resistance sheet 7, the resistance sheet 7 is connected with a terminal wire harness assembly 8, and a cover plate 9 is connected to the skeleton 1. During operation, the oil level sensor is placed in the fuel tank. As the automotive fuel is consumed, the float assembly 3 will drop accordingly, and during the dropping process, it drives the outer rocker arm 2 to rotate, thereby driving the rotation of the inner rocker arm 5, further driving the rotation of the reed assembly 6, and then changing the position of the reed assembly 6 on the resistance sheet 7, thereby changing the resistance value. The change in the resistance value is converted into a change in the potential signal through the terminal wire harness assembly 8, and the potential signal is reflected on the oil level gauge and converted into the scale on the oil level gauge according to a certain ratio. Among them, the terminal wire harness assembly 8 is connected with an oil level gauge. By arranging the first sealing ring 4 between the outer rocker arm 2 and the skeleton 1, the utility model seals the rotatably connected outer rocker arm 2 and the skeleton 1 well, and effectively prevents gasoline from entering the interior of the skeleton 1 and damaging the reed assembly 6, the resistance sheet 7, the terminal wire harness assembly 8, etc. inside the skeleton 1. It can be applied to ethanol gasoline above E85, has a long service life and high safety performance.

[0037] The outer rocker arm 2 includes an outer rocker arm body 10 and a rotating shaft 11 fixedly connected to the outer rocker arm body 10. The rotating shaft 11 includes a first rotating shaft 12, a second rotating shaft 13 is fixedly connected to the first rotating shaft 12, and a connecting portion 14 connected to the inner rocker arm 5 is fixed on the second rotating shaft 13. A first through hole 15 matching the first rotating shaft 12 is provided on the skeleton 1. The diameter of the first rotating shaft 12 is larger than the diameter of the second rotating shaft 13. A first sealing ring 4 is sleeved on the second rotating shaft 13. The diameter of the first rotating shaft 12 is equal to the diameter of the first through hole 15, so as to fill the first through hole 15 to the greatest extent without affecting the rotation of the first rotating shaft 12. By setting the diameter of the first rotating shaft 12 to be larger than the diameter of the second rotating shaft 13, the first sealing ring 4 can be sleeved on the second rotating shaft 13, and the first sealing ring 4 can be set to a relatively thick thickness, thereby making the sealing effect better. The first sealing ring 4 is in interference fit with the inner wall of the first through hole 15.

[0038] The first sealing ring 4 includes a dynamic sealing portion 16 sleeved on the second rotating shaft 13. A static sealing portion 17 is fixed on the dynamic sealing portion 16. The static sealing portion 17 is in interference fit with the inner wall of the first through hole 15, achieving good sealing with the inner wall of the first through hole 15. The inner wall of the dynamic sealing portion 16 is in interference fit with the second rotating shaft 13. In this way, when the second rotating shaft 13 rotates along the inner ring of the dynamic sealing portion 16, good sealing between the two is also achieved. Through the double-layer sealing of the first sealing ring 4, gasoline is well blocked from seeping into the interior of the skeleton 1.

[0039] The float assembly 3 includes a float 18. One end of a float link 19 is fixed to the float 18, and the other end of the float link 19 is fixed to the outer rocker arm 2. The float 18 is used to sense the change in the fuel level. When the float 18 changes with the change in the fuel level, it will drive the float link 19 to change accordingly, and drive the outer rocker arm 2 to rotate through the float link 19.

[0040] A reed assembly 6 is riveted to the inner rocker arm 5 by a rivet 20. The reed assembly 6 is composed of two five-finger brush pieces.

[0041] The terminal wire harness assembly 8 includes a plurality of terminals 21 inserted on the resistance piece 7. A wire 22 is fixed to the lower end of the terminal 21. The connection between the terminal 21 and the wire 22 is wrapped with a plastic part 23. A second sealing ring 24 is provided at the junction of the terminal 21 and the plastic part 23. A second through hole 25 through which the terminal 21 passes is provided at the bottom of the skeleton 1. Through the setting of the second sealing ring 24, the sealing performance inside the skeleton 1 is further improved, and at the same time, the sealing performance inside the plastic part 23 is also enhanced, providing good protection for the connection between the terminal 21 and the wire 22.

[0042] There are 3 terminals 21, one of which is grounded, so that the fuel can be grounded to prevent electrostatic ignition and improve the safety of use.

[0043] Lubricating grease is applied to the part of the second rotating shaft 13 in contact with the first sealing ring 4, which greatly reduces the rotation resistance of the second rotating shaft 13 and facilitates the normal rotation of the second rotating shaft 13.

[0044] Lubricating oil is injected into the skeleton 1. By filling lubricating oil in the skeleton 1, the wear of the components inside the skeleton 1 during the working process is greatly reduced. It is changed from a traditional dry-type oil level sensor to a wet-type oil level sensor, providing good protection for the oil level sensor and greatly increasing the service life of the oil level sensor.

[0045] The part of the float link 19 fixed to the skeleton 1 is set as a 7-shaped link 26. The rotating shaft 11 is provided with a blind hole 27 inward. The cross bar 28 of the 7-shaped link 26 is fixed in the blind hole 27. The vertical bar 29 of the 7-shaped link 26 is stuck in a plurality of arc-shaped limit blocks 30 arranged alternately on the outer rocker arm body 10. The setting of the 7-shaped link 26 greatly facilitates the rotation of the outer rocker arm 2 driven by the float link 19. Among them, the blind hole 27 and the alternately arranged arc-shaped limit blocks 30 limit and fix the 7-shaped link 26 well, thereby ensuring the accuracy of the entire fuel level sensor.

[0046] Working principle: During operation, the fuel level sensor is placed in the fuel tank. As the automotive fuel is consumed, the float assembly 3 will drop accordingly, and drive the outer rocker arm 2 to rotate during the dropping process, thereby driving the rotation of the inner rocker arm 5, further driving the rotation of the reed assembly 6, further changing the position of the reed assembly 6 on the resistance sheet 7, and further changing the resistance value. The change in the resistance value is converted into a change in the potential signal through the terminal wire harness assembly 8. The potential signal is reflected on the fuel level gauge and converted into the scale on the fuel level gauge according to a certain ratio. Among them, the terminal wire harness assembly 8 is connected to the fuel level gauge. By providing a first sealing ring 4 between the outer rocker arm 2 and the skeleton 1, the present utility model seals the rotatably connected outer rocker arm 2 and skeleton 1 well, and effectively prevents gasoline from entering the interior of the skeleton 1 and damaging the reed assembly 6, resistance sheet 7, terminal wire harness assembly 8, etc. inside the skeleton 1. It can be applied to ethanol gasoline above E85, with a long service life and high safety performance.

[0047] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A sealed wet-type built-in oil level sensor, characterized in that, The invention comprises a frame (1), an outer rocker arm (2) being rotatably connected to the frame (1), a float assembly (3) being fixed to the outer rocker arm (2), a first sealing ring (4) being arranged between the outer rocker arm (2) and the frame (1), the outer rocker arm (2) being connected to an inner rocker arm (5), a reed assembly (6) being fixed to the inner rocker arm (5), the reed assembly (6) being connected to a resistor (7), the resistor (7) being connected to a terminal harness assembly (8), and a cover plate (9) being connected to the frame (1).

2. The sealed wet type built-in oil level sensor according to claim 1, wherein, The outer rocker arm (2) comprises an outer rocker arm body (10) and a rotating shaft (11) fixedly connected to the outer rocker arm body (10), the rotating shaft (11) comprises a first rotating shaft (12), a second rotating shaft (13) is fixedly connected to the first rotating shaft (12), a connecting portion (14) connected to the inner rocker arm (5) is fixed to the second rotating shaft (13), a first through hole (15) matching the first rotating shaft (12) is provided on the skeleton (1), the diameter of the first rotating shaft (12) is larger than the diameter of the second rotating shaft (13), and the first sealing ring (4) is sleeved on the second rotating shaft (13).

3. The sealed wet-type built-in oil level sensor according to claim 2, characterized in that, The first sealing ring (4) comprises a dynamic sealing portion (16) sleeved with the second rotating shaft (13), and a static sealing portion (17) is fixed on the dynamic sealing portion (16).

4. A sealed wet-type built-in oil level sensor according to claim 2, characterized in that, The float assembly (3) comprises a float (18), one end of a float connecting rod (19) being fixed to the float (18), and the other end of the float connecting rod (19) being fixed to the outer rocker arm (2).

5. A sealed wet-type built-in oil level sensor according to claim 1, characterized in that, The leaf spring assembly (6) is riveted to the inner rocker arm (5) via rivets (20).

6. The sealed wet type built-in oil level sensor according to claim 1, wherein The terminal harness assembly (8) comprises a plurality of terminals (21) plugged into the resistor (7), a wire (22) being fixed to the lower end of the terminal (21), a plastic part (23) wrapping the connection between the terminal (21) and the wire (22), a second sealing ring (24) being provided at the junction between the terminal (21) and the plastic part (23), and a second through hole (25) through which the terminal (21) passes is provided at the bottom of the frame (1).

7. A sealed wet type built-in oil level sensor according to claim 6, characterized in that, The terminals (21) are provided in three numbers.

8. The hermetically sealed wet type built-in oil level sensor according to claim 2, wherein, The portion of the second rotating shaft (13) that contacts the first sealing ring (4) is coated with lubricating grease.

9. The sealed wet type built-in oil level sensor according to claim 1, wherein The skeleton (1) is filled with lubricating oil.

10. A sealed wet-type built-in oil level sensor according to claim 4, characterized in that, The portion of the float connecting rod (19) fixed to the frame (1) is arranged as a 7-shaped connecting rod (26); a blind hole (27) is provided inwardly of the rotating shaft (11); a horizontal rod (28) of the 7-shaped connecting rod (26) is fixed in the blind hole (27); and a vertical rod (29) of the 7-shaped connecting rod (26) is clamped in a plurality of arc-shaped limit blocks (30) staggeredly arranged on the outer rocker arm body (10).

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