Oil level sensor

Abstract

The utility model relates to an oil level sensor, and relates to the technical field of sensors, the oil level sensor comprises a body, a connecting rod and a floater, the body comprises a base and a cover plate fixedly arranged on the base, a mounting cavity is formed in the base, and a circuit board is fixedly arranged on the bottom side of the mounting cavity; a cable is fixedly arranged on the edge of the circuit board, and an arc-shaped electric grid is fixedly arranged on the side face, facing the cover plate, of the circuit board. One end of the connecting rod is hinged to the floater, a connecting plate inserted into the mounting cavity is fixedly arranged at the other end of the connecting rod, the connecting plate is rotationally connected with the inner wall of the mounting cavity, and an electric brush abutting against the arc-shaped electric grid is fixedly arranged on the connecting plate; in the application, as the cable is fixed on the base, the cable cannot be bent and rotated synchronously in a reciprocating manner when the connecting rod and the connecting plate swing, so that the possibility that the cable is damaged is reduced, and the corresponding service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of sensors, and in particular to an oil level sensor. Background Art

[0002] Fuel level sensors play a key role in various liquid storage and transportation equipment, particularly in fuel systems, where they help monitor and control oil levels to ensure the normal operation and safety of the equipment. As a core component in the fuel system, the fuel level sensor on the fuel pump is particularly crucial.

[0003] In the related art, an oil level sensor includes a sensor body, a connecting rod and a float. The two ends of the connecting rod are rotatably connected to the sensor body and the float respectively. A connecting end is fixedly provided at the end of the connecting rod close to the sensor body, wherein the connecting end is connected to a wire for outputting a signal and two independent contacts. The two contacts are slidably connected to the electric grid on the sensor body. When the oil level sensor is used, the sensor body is usually firmly mounted on the side wall of the oil tank, and the float always floats on the oil surface. As the oil level in the tank fluctuates, the float will rise or fall accordingly. This action is transmitted by the connecting rod, causing the contact to slide on the electric grid, thereby changing the resistance value of the sensor body. The change in resistance value will cause a corresponding change in the output potential signal. This potential signal is then captured and converted by the instrument, reflecting the oil level in the tank according to a preset proportional relationship.

[0004] However, when the connecting rod rotates with the floating of the float, the wires on the connecting end will also swing back and forth. This frequent swing may not only accelerate the aging of the wires, but may also cause the connection between the connecting end and the wires to be damaged due to multiple bending, thereby affecting the performance of the sensor and the stability of signal transmission. There is room for improvement. Utility Model Content

[0005] The purpose of this application is to provide an oil level sensor to solve the problem in the above-mentioned related art that the cable on the connecting end may be bent multiple times and damaged, thereby affecting the performance of the sensor.

[0006] The oil level sensor provided in this application adopts the following technical solution:

[0007] An oil level sensor includes a body, a connecting rod and a float, the body including a base and a cover plate fixed to the base, the base is provided with a mounting cavity, a circuit board is fixed to the bottom side of the mounting cavity, a cable is fixed to the edge of the circuit board, and an arc-shaped electric grid is fixed to the side facing the cover plate; one end of the connecting rod is hinged to the float, and the other end of the connecting rod is fixed to a connecting plate inserted into the mounting cavity, the connecting plate is rotatably connected to the inner wall of the mounting cavity, and a brush is fixed to the connecting plate that abuts the arc-shaped electric grid.

[0008] By adopting the above technical solution, when the oil level sensor is used, the main body is pre-fixed on the inner wall of the oil tank, and the float is set to float on the upper surface of the oil. As the oil in the oil tank is consumed or added, the float will drop or rise accordingly. This action is transmitted by the connecting rod, causing the brush to slide on the arc-shaped electric grid, thereby changing the resistance value of the circuit board. Finally, the change in resistance value will output the potential signal to the display screen outside the oil tank through the cable; because the cable is fixed on the base, the cable will not bend and rotate back and forth synchronously when the connecting rod and the connecting plate swing, thereby reducing the possibility of cable damage and extending the corresponding service life.

[0009] Optionally, two limit plates are symmetrically fixed on the bottom side of the installation cavity, and the side surfaces of the two limit plates that are close to each other are curved surfaces and can fit with the outer side surfaces of the connecting plate; the side surfaces of the limit plates that are close to each other are fixed with limit hooks, and one side of the limit hooks abuts against the side edge of the connecting plate away from the base.

[0010] By adopting the above technical solution, when the connecting plate is rotated and installed on the base, a part of the connecting plate is inserted between the two limit plates. After the insertion is completed, the connecting plate is placed in a natural state through the limit hook, and the outer peripheral surface of the connecting plate fits with the arc surface on the limit plate when the connecting plate rotates, thereby improving the stability of the connecting plate when rotating relative to the base.

[0011] Optionally, a limiting sleeve is fixedly provided on the side of the connecting plate away from the cover plate, a limiting boss is fixedly provided on the inner wall of the mounting cavity, the limiting sleeve is sleeved on the outer peripheral surface of the limiting boss, and the limiting sleeve can reciprocate around the axis of the limiting boss.

[0012] By adopting the above technical solution, due to the coordinated arrangement of the limiting sleeve and the limiting boss, when the connecting plate and the base are assembled, the limiting sleeve on the connecting plate is sleeved on the outer peripheral surface of the limiting boss, thereby further limiting the rotation of the connecting plate and improving the stability of the connecting plate when it rotates with the connecting rod.

[0013] Optionally, a locking block is fixedly provided on the side of the connecting plate facing the cover plate, and the locking block is provided with a locking notch for the connecting rod to be snapped into and fixed.

[0014] By adopting the above technical solution, when the connecting rod and the connecting plate are assembled, the outer peripheral part of the connecting rod is inserted into the locking notch on the locking block, thereby facilitating the disassembly and assembly of the connecting rod and the connecting plate, so that the connecting plate is driven to rotate synchronously when the connecting rod rotates.

[0015] Optionally, a first positioning hole is provided on the connecting plate, a second positioning hole that coincides with the first positioning hole is provided on the limiting boss, and a bending portion that passes through the first positioning hole and the second positioning hole in sequence is fixed to the end of the connecting rod away from the float.

[0016] By adopting the above technical solution, when the connecting rod and the connecting plate are assembled, the bent portion on the connecting rod is synchronously passed through the first positioning hole and the second positioning hole in sequence, thereby further improving the assembly stability of the connecting rod and the connecting plate.

[0017] Optionally, two abutment blocks are symmetrically fixed on the side edge of the base facing the cover plate, and the abutment blocks are provided with abutment inclined surfaces that can abut and fit with one side of the connecting plate.

[0018] By adopting the above technical solution, when the connecting rod rotates to the extreme position, due to the setting of the abutment block, one side of the connecting plate can abut against the abutment slope on the abutment block, thereby limiting the rotation range of the connecting rod.

[0019] Optionally, two symmetrical locking plates are fixedly provided on the side edges of the cover plate facing the base, locking blocks are fixedly provided on two opposite sides of the base, and locking through holes are provided on the locking plates for the locking blocks to be inserted into.

[0020] By adopting the above technical solution, when the cover and the base are assembled and fixed, due to the matching arrangement of the locking plate and the locking block, the locking block on the base can be snapped into the locking through hole on the locking plate, thereby facilitating the assembly and fixation of the base and the cover.

[0021] Optionally, the base is fixedly provided with a plurality of limiting clamping plates on the side walls of the installation cavity, and the limiting clamping plates are fixedly provided with limiting barbs for limiting contact with the circuit board.

[0022] By adopting the above technical solution, when the circuit board is installed, due to the coordinated arrangement of several limiting clips and limiting hooks, it can be clipped into the installation cavity along the inclined surface on the limiting hooks, thereby improving the assembly efficiency of the circuit board.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Since the cable is fixed to the base, the cable does not bend and rotate synchronously when the connecting rod and the connecting plate swing, thereby reducing the possibility of cable damage and extending the corresponding service life.

[0025] 2. When the connecting rod and the connecting plate are assembled, the bent portion is passed through the first positioning hole and the second positioning hole in sequence, and at the same time, the outer peripheral portion of the connecting rod is inserted into the locking notches on the two locking blocks, so that the connecting rod and the connecting plate can be quickly fixedly connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present application;

[0029] Figure 3 This is a partial cross-sectional structural diagram of the embodiment of the present application showing the installation and cooperation between the base and the cover;

[0030] Figure 4 It is a schematic diagram of the local structure of the abutment block installation cooperation in an embodiment of the present application.

[0031] In the figure, 1. body; 11. base; 111. mounting cavity; 112. limiting card plate; 1121. limiting hook; 113. locking block; 114. limiting plate; 1141. limiting hook; 115. limiting boss; 1151. second positioning hole; 116. abutting block; 1161. abutting slope; 12. cover plate; 121. locking plate; 1211. locking through hole; 13. circuit board; 131. arc-shaped electric grid; 14. cable; 2. connecting rod; 21. bending part; 3. float; 4. connecting plate; 41. brush; 42. limiting sleeve; 43. locking block; 431. locking notch; 44. first positioning hole. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0033] Example:

[0034] Reference Figure 1 and Figure 2 An oil level sensor includes a body 1, a connecting rod 2, and a float 3. The body 1 includes a base 11 and a cover 12 fixed to the base 11. The base 11 defines a mounting cavity 111. A circuit board 13 is fixed to the bottom side of the mounting cavity 111. A cable 14 is fixed to the edge of the circuit board 13, and two arc-shaped electric grids 131 are fixed to the side facing the cover 12. One end of the connecting rod 2 is hinged to the float 3. The other end of the connecting rod 2 is fixed to a connecting plate 4 that is rotatably inserted into the mounting cavity 111. The connecting plate 4 is rotatably connected to the inner wall of the mounting cavity 111. Two brushes 41 are fixed to the connecting plate 4, which abut against the two arc-shaped electric grids 131.

[0035] When the oil level sensor is used, the main body 1 is fixed on the inner wall of the oil tank, and the float 3 is set to float on the upper surface of the oil. As the oil level in the tank fluctuates, the float 3 will rise or fall accordingly. This action is transmitted by the connecting rod 2, causing the brush 41 to slide on the arc-shaped electric grid 131, thereby changing the resistance value of the circuit board 13. The change in resistance value will output the potential signal to the display screen outside the oil tank through the cable 14.

[0036] Reference Figure 2 and Figure 3 The base 11 is fixed with four limiting clips 112 on the side walls of the installation cavity 111, and the limiting clips 112 are fixed with limiting hooks 1121 for limiting the contact with the circuit board 13; when the circuit board 13 is installed, it can be inserted into the installation cavity 111 along the inclined surface on the limiting hooks 1121.

[0037] Reference Figure 2 Two symmetrical locking plates 121 are integrally formed on the side edges of the cover 12 facing the base 11, and locking blocks 113 with a trapezoidal cross-section are fixed on the opposite sides of the base 11. Locking through holes 1211 are opened on the locking plates 121 for the locking blocks 113 to be snapped into. When the cover 12 and the base 11 are assembled and fixed, the locking blocks 113 on the base 11 are snapped into the locking through holes 1211 on the locking plates 121.

[0038] Reference Figure 3 Two limiting plates 114 are symmetrically fixed on the bottom side of the installation cavity 111. The sides of the two limiting plates 114 that are close to each other are arc-shaped and can fit with the outer side of the connecting plate 4. A limiting hook 1141 is fixed on the sides of the two limiting plates 114 that are close to each other. One side of the limiting hook 1141 abuts against the side edge of the connecting plate 4 away from the base 11.

[0039] A limiting sleeve 42 is integrally formed on the side of the connecting plate 4 away from the cover plate 12, and a limiting boss 115 is integrally formed on the inner wall of the mounting cavity 111. The limiting sleeve 42 is sleeved on the outer peripheral surface of the limiting boss 115. The limiting sleeve 42 can rotate back and forth around the axis of the limiting boss 115, thereby realizing the rotational connection between the connecting plate 4 and the main body.

[0040] Reference Figure 2 and Figure 3 Two locking blocks 43 are fixedly provided on the side of the connecting plate 4 facing the cover plate 12 in a straight line direction, and a locking notch is provided on the locking block 43 for the outer periphery of the connecting rod 2 to be snapped in; a first positioning hole 44 is provided on the connecting plate 4, and a second positioning hole 1151 is provided on the limiting boss 115 to coincide with the first positioning hole 44, and the end of the connecting rod 2 away from the float 3 is integrally bent to form a bent portion 21;

[0041] When the connecting rod 2 and the connecting plate 4 are assembled, the bent portion 21 is passed through the first positioning hole 44 and the second positioning hole 1151 in sequence, and at the same time, the outer peripheral portion of the connecting rod 2 is inserted into the locking notches 431 on the two locking blocks 43, so that the connecting rod 2 and the connecting plate 4 can be fixedly connected, so that when the connecting rod 2 rotates, the connecting plate 4 is driven to rotate synchronously.

[0042] Reference Figure 4 Two symmetrical abutment blocks 116 are integrally formed on the side edges of the base 11 facing the cover plate 12, wherein the abutment blocks 116 are provided with abutment slopes 1161 that can fit with the connecting plate 4; when the connecting rod 2 is rotated upward or downward to the extreme position, one side of the connecting plate 4 can abut against the abutment slope 1161 on the abutment block 116, thereby limiting the rotation range of the connecting rod 2.

[0043] The implementation principle of the embodiment of this application is:

[0044] When the oil level sensor is used, the main body 1 is pre-fixed to the inner wall of the oil tank, and the float 3 is set to float on the upper surface of the oil. As the oil in the tank is consumed or added, the float 3 will drop or rise accordingly. This action is transmitted by the connecting rod 2, causing the brush 41 to slide on the arc-shaped electric grid 131, thereby changing the resistance value of the circuit board 13; because the cable 14 is fixed to the base 11, it does not bend and rotate back and forth during use, thereby reducing the possibility of damage to the cable 14 and extending its corresponding service life.

[0045] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. An oil level sensor, characterized in that: The invention comprises a body (1), a connecting rod (2) and a float (3); the body (1) comprises a base (11) and a cover plate (12) fixed on the base (11); a mounting cavity (111) is provided on the base (11); a circuit board (13) is fixed on the bottom side of the mounting cavity (111); a cable (14) is fixed on the edge of the circuit board (13); and an arc-shaped electric grid (131) is fixed on the side facing the cover plate (12); One end of the connecting rod (2) is hinged to the float (3), and the other end of the connecting rod (2) is fixedly provided with a connecting plate (4) inserted into the installation cavity (111). The connecting plate (4) is rotatably connected to the inner wall of the installation cavity (111), and a brush (41) is fixedly provided on the connecting plate (4) and abuts against the arc-shaped electric grid (131).

2. The oil level sensor according to claim 1, characterized in that: Two limiting plates (114) are symmetrically fixed on the bottom side of the installation cavity (111), and the side surfaces of the two limiting plates (114) that are close to each other are arc surfaces and can fit with the outer side surface of the connecting plate (4); Limiting hooks (1141) are fixedly provided on the mutually adjacent sides of the limiting plates (114), and one side of the limiting hooks (1141) abuts against the side edge of the connecting plate (4) away from the base (11).

3. The oil level sensor according to claim 2, characterized in that: A limiting sleeve (42) is fixedly provided on the side of the connecting plate (4) away from the cover plate (12), a limiting boss (115) is fixedly provided on the inner wall of the installation cavity (111), the limiting sleeve (42) is sleeved on the outer peripheral surface of the limiting boss (115), and the limiting sleeve (42) can reciprocate around the axis of the limiting boss (115).

4. The oil level sensor according to claim 3, characterized in that: A locking block (43) is fixedly provided on the side of the connecting plate (4) facing the cover plate (12), and a locking notch is provided on the locking block (43) for the connecting rod (2) to be snapped in and fixed.

5. The oil level sensor according to claim 4, characterized in that: A first positioning hole (44) is provided on the connecting plate (4), a second positioning hole (1151) overlapping with the first positioning hole (44) is provided on the limiting boss (115), and a bent portion (21) is fixedly provided at the end of the connecting rod (2) away from the float (3) and passing through the first positioning hole (44) and the second positioning hole (1151) in sequence.

6. The oil level sensor according to claim 1, characterized in that: Two abutment blocks (116) are symmetrically fixed on the side edges of the base (11) facing the cover plate (12), and the abutment blocks (116) are provided with abutment slopes (1161) capable of abutting and fitting with one side of the connecting plate (4).

7. The oil level sensor according to claim 1, characterized in that: Two symmetrical locking plates (121) are fixedly provided on the side edges of the cover plate (12) facing the base (11); locking blocks (113) are fixedly provided on the two opposite sides of the base (11); and locking through holes (1211) are provided on the locking plates (121) for the locking blocks (113) to be engaged.

8. The oil level sensor according to claim 1, characterized in that: The base (11) is fixedly provided with a plurality of limiting clamping plates (112) on the side walls of the installation cavity (111), and the limiting clamping plates (112) are fixedly provided with limiting barbs (1121) for limiting contact with the circuit board (13).

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