Internal closed type oil filling liquid level sensor

Abstract

The utility model discloses an inner closed type oil filling liquid level sensor in the field of sensor oil level detection, which comprises a shell with a cavity, a cover plate for blocking the cavity is arranged on the front side of the shell, a resistor disc is arranged in the cavity, a rotating lever is rotatably connected onto the shell and is fixed with an outer rotating piece, and the outer rotating piece is fixed with the shell. An outer magnet is arranged on the outer rotating piece, an inner swing rod is rotationally connected into the cavity, an inner transmission block corresponding to the outer magnet is arranged at one end of the inner swing rod, a reed corresponding to the resistor disc is arranged on the inner swing rod, the inner swing rod coincides with the rotating axis of the outer rotating piece, and the cover plate is fixedly welded to the shell. The cover plate and the outer rotating piece are each provided with a through hole allowing the rotating lever to penetrate through, and the cavity is filled with insulating lubricating oil. According to the utility model, the insulating lubricating oil with the volume content of 80% is injected into the cavity of the shell, so that the friction between the reed and the resistor disc is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of sensor oil level detection, in particular to an inner closed type oil filling level sensor. Background Art

[0002] The liquid level sensor is a pressure sensor that measures the liquid level. In the prior art, the liquid level sensor generally uses an injection-molded magnet embedded in the inner and outer rotating brackets. The lever support rotates through the change of the oil level or liquid level, so that like charges attract each other, the reed support rotates, and the reed rubs against the resistor to achieve resistance changes and display the oil level information. However, its disadvantage is that the friction between the reed and the resistor is dry, which can easily damage the resistor and make it unusable, which can easily affect the service life of the product. Utility Model Content

[0003] The utility model aims to provide an inner closed oil filling level sensor, which can inject 80% insulating lubricating oil into the shell cavity, reduce the friction between the reed and the resistor, and increase the service life.

[0004] The purpose of the utility model is achieved as follows: an internally closed oil-filled level sensor, comprising a shell with a cavity, a cover plate blocking the cavity is arranged on the front side of the shell, a resistor is arranged in the cavity, a rotating lever is rotatably connected to the shell, the rotating lever is fixed to an outer rotating member, an outer magnet is arranged on the outer rotating member, an inner swing rod is rotatably connected in the cavity, an inner transmission block corresponding to the outer magnet is arranged at one end of the inner swing rod, a spring corresponding to the resistor is arranged on the inner swing rod, the inner swing rod coincides with the rotation axis of the outer rotating member, the cover plate is welded and fixed to the shell, and a through hole for accommodating the rotating lever to pass through is arranged on the cover plate and the outer rotating member, and the cavity is filled with insulating lubricating oil.

[0005] The utility model is installed in the oil tank of an automobile to display the oil level. When working, the oil level changes, driving the rotating lever to rotate, the external magnet and the internal transmission block attract each other, the internal transmission block drives the internal swing rod to rotate, the reed rotates, the reed position changes and rubs the resistor, and the metal guide band and metal cylinder of the resistor are connected to the measurement circuit system to achieve resistance value changes, thereby displaying the oil level information; a number of limit blocks for limiting the resistor are arranged in the shell. Compared with the prior art, the utility model has the beneficial effect that: the insulating lubricating oil with a volume content of 80% can be injected into the shell cavity, the friction between the reed and the resistor is reduced, and the service life is increased.

[0006] As a further improvement of the utility model, a rotating central cylinder is arranged in the cavity of the housing, and the rotating lever includes an exposed section and an axial section, one end of the axial section is inserted into the central hole of the rotating central cylinder and is rotatably connected to the rotating central cylinder, and the other end of the axial section extends out of the cover plate and the through hole of the outer rotating member and is connected to the exposed section outside the housing. One end of the axial section passes through the rotating central cylinder and extends out of the housing.

[0007] In order to fix the outer rotating part and the rotating lever, the outer rotating part is provided with a plurality of claws for clamping the exposed section of the rotating lever, and the end of the outer rotating part is vertically provided with a mounting portion corresponding to the arc-shaped side surface outside the shell, and the external magnet is arranged on the mounting portion, and the mounting portion is parallel to the length direction of the axial section.

[0008] In order to facilitate the swing of the inner swing rod, a bushing is provided on the outer periphery of the rotating central tube, and the other end of the inner swing rod is rotatably connected to the bushing.

[0009] As a further improvement of the present invention, the insulating lubricating oil content accounts for 79-81% of the volume of the cavity in the housing, and the insulating lubricating oil content is preferably 80%.

[0010] As a further improvement of the utility model, two metal conducting strips connected to the resistor are arranged inside the shell, and two metal cylinders extending into the shell cavity are arranged on the shell, and the two metal cylinders are respectively connected to the two metal conducting strips. The metal conducting strips and metal cylinders of the resistor are connected to the measurement circuit system to realize the change of resistance value, thereby displaying the oil level information.

[0011] As a further improvement of the present invention, the inner transmission block is a magnet block or a metal iron block. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front structural schematic diagram of the utility model.

[0013] Figure 2 for Figure 1 A partial enlarged view of .

[0014] Figure 3 It is a schematic diagram of the back structure of the utility model.

[0015] Figure 4 It is a schematic structural diagram of the inner and outer rotating parts of the utility model.

[0016] Figure 5 It is a schematic diagram of the internal structure of the utility model.

[0017] Figure 6 It is a schematic diagram of the internal structure of the utility model.

[0018] Figure 7 It is a schematic diagram of the structure of the rotating lever and the rotating center tube.

[0019] Among them, 1 is a shell, 1a is a cavity, 2 is a cover plate, 3 is a resistor, 4 is a rotating lever, 4a is an exposed section, 4b is an axial section, 5 is an external rotating member, 5a is a claw, 5b is a mounting portion, 6 is an external magnet, 7 is an internal rocker arm, 8 is an internal transmission block, 9 is a reed, 10 is a through hole, 11 is a rotating center tube, 11a is a center hole, 12 is a limit block, 13 is a bushing, 14 is a metal guide belt, 15 is a metal cylinder, and 16 is a float. DETAILED DESCRIPTION

[0020] like Figure 1-7 As shown, an internally closed oil filling level sensor comprises a housing 1 having a cavity 1a, a cover plate 2 for blocking the cavity 1a is arranged at the front side of the housing 1, a resistor 3 is arranged in the cavity 1a, a rotating lever 4 is rotatably connected to the housing 1, the rotating lever 4 is fixed to an external rotating member 5, an external magnet 6 is arranged on the external rotating member 5, an internal swing rod 7 is rotatably connected in the cavity 1a, an internal transmission block 8 corresponding to the external magnet 6 is arranged at one end of the internal swing rod 7, and the internal transmission block 8 is a magnet block or a metal iron block; a spring 9 corresponding to the resistor 3 is arranged on the internal swing rod 7, and the internal swing rod 7 coincides with the rotation axis of the external rotating member 5, the cover plate 2 is welded and fixed to the housing 1, and a through hole 10 for allowing the rotating lever 4 to pass through is arranged on the cover plate 2 and the external rotating member 5, and the cavity 1a is filled with insulating lubricating oil. The content of the insulating lubricating oil accounts for 79-81% of the volume of the cavity 1a in the housing 1.

[0021] A rotating central cylinder 11 is arranged in the cavity 1a of the housing 1, and the rotating lever 4 includes an exposed section 4a and an axial section 4b, one end of the axial section 4b is inserted into the central hole 11a of the rotating central cylinder 11 and is rotatably connected to the rotating central cylinder 11, and the other end of the axial section 4b extends out of the through hole 10 of the cover plate 2 and the outer rotating member 5 and is connected to the exposed section 4a outside the housing 1. One end of the axial section 4b passes through the rotating central cylinder 11 and extends out of the housing 1.

[0022] In order to fix the outer rotating member 5 to the rotating lever 4, a plurality of claws 5a are provided on the outer rotating member 5 for clamping the exposed section 4a of the rotating lever 4. A mounting portion 5b corresponding to the arc-shaped side surface outside the shell 1 is vertically provided at the end of the outer rotating member 5. The external magnet 6 is arranged on the mounting portion 5b, and the mounting portion 5b is parallel to the length direction of the axial section 4b.

[0023] In order to facilitate the swing of the inner swing arm 7 , a bushing 13 is provided on the outer periphery of the rotating central tube 11 , and the other end of the inner swing arm 7 is rotatably connected to the bushing 13 .

[0024] Two metal conducting strips 14 connected to the resistor 3 are arranged inside the housing 1, and two metal cylinders 15 extending into the cavity 1a of the housing 1 are arranged on the housing 1, and the two metal cylinders 15 are respectively connected to the two metal conducting strips 14. The metal conducting strips 14 and metal cylinders 15 of the resistor 3 are connected to the measuring circuit system to realize the change of resistance value, thereby displaying the oil level information.

[0025] The utility model is installed in the oil tank of an automobile to display the oil level. When working, a float 16 floating on the liquid surface is provided at the end of the rotating lever 4. The rotating lever 4 is driven to rotate by the change of the oil level, and the external magnet 6 and the internal transmission block 8 are attracted to each other. The internal transmission block 8 drives the internal swing rod 7 to rotate, and the reed 9 rotates. The position of the reed 9 changes and rubs the resistor 3. The metal guide band 14 and the metal cylinder 15 of the resistor 3 are connected to the measuring circuit system to realize the change of resistance value, thereby displaying the oil level information; a plurality of limit blocks 12 for limiting the resistor 3 are provided in the housing 1. The utility model has the advantages that: the insulating lubricating oil with a volume content of 80% can be injected into the cavity 1a of the housing 1, the friction between the reed 9 and the resistor 3 is reduced, and the service life is improved.

[0026] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. An internally closed oil filling level sensor, comprising a housing with a cavity, a cover plate for blocking the cavity is arranged on the front side of the housing, a resistor is arranged in the cavity, a rotating lever is rotatably connected to the housing, the rotating lever is fixed to an outer rotating member, an outer magnet is arranged on the outer rotating member, an inner swing rod is rotatably connected in the cavity, an inner transmission block corresponding to the outer magnet is arranged at one end of the inner swing rod, and a spring corresponding to the resistor is arranged on the inner swing rod, characterized in that: The inner swing rod coincides with the rotation axis of the outer rotating member, the cover plate is welded and fixed to the shell, and both the cover plate and the outer rotating member are provided with through holes for allowing the rotating lever to pass through, and the cavity is filled with insulating lubricating oil.

2. The internally closed oil filling level sensor according to claim 1 is characterized in that: A rotating center cylinder is arranged in the cavity of the shell, and the rotating lever includes an exposed section and an axial section. One end of the axial section is inserted into the center hole of the rotating center cylinder and is rotatably connected to the rotating center cylinder, and the other end of the axial section extends out of the cover plate, the through hole of the outer rotating part and is connected to the exposed section outside the shell.

3. The internally closed oil filling level sensor according to claim 2 is characterized in that: The outer rotating member is provided with a plurality of claws for clamping the exposed section of the rotating lever, and a mounting portion corresponding to the arc-shaped side surface outside the shell is vertically provided at the end of the outer rotating member, and the external magnet is arranged on the mounting portion, and the mounting portion is parallel to the length direction of the axial section.

4. The internally closed oil filling level sensor according to claim 2 is characterized in that: A bushing is arranged on the outer periphery of the rotating central cylinder, and the other end of the inner swing rod is rotatably connected to the bushing.

5. An internally closed oil filling level sensor according to any one of claims 1 to 4, characterized in that: The insulating lubricating oil content accounts for 79-81% of the volume of the cavity in the shell.

6. An internally closed oil filling level sensor according to any one of claims 1 to 4, characterized in that: Two metal conducting strips connected to the resistor sheet are arranged inside the shell, and two metal cylinders extending into the shell cavity are arranged on the shell, and the two metal cylinders are respectively connected to the two metal conducting strips.

7. An internally closed oil filling level sensor according to any one of claims 1 to 4, characterized in that: The inner transmission block is a magnet block or a metal iron block.

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