Sealed straight cylinder type oil level sensor

Abstract

The utility model relates to the field of oil level sensors, in particular to a sealed straight cylinder type oil level sensor which comprises a flange support and a sealing cover plate, a cavity is arranged between the flange support and the sealing cover plate, a resistor disc and a conductor are arranged in the cavity, and the resistor disc and the conductor are both connected with a terminal wire harness assembly and a brush piece assembly. The brush piece assembly is fixed to the inner side of the brush piece support, the brush piece support is slidably connected with the inner wall of the cavity, an inner magnet is fixed to the outer side of the brush piece support, an outer magnet opposite to the inner magnet is arranged outside the sealing cover plate and fixed to the floater assembly, and the floater assembly is slidably connected with the flange support. According to the oil level sensor, the floater assembly is arranged on the flange support, the overall space is greatly saved, in addition, the cavity is well sealed through the sealing cover plate, the service life of the oil level sensor is prolonged, and meanwhile through the arrangement of the inner magnet and the outer magnet which are arranged inside and outside the sealing cover plate, the oil level sensor is more stable. Effective and accurate transmission is carried out on the premise that the sealing performance is not affected.

Description

Technical Field

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

[0002] An automotive oil level sensor is used to detect the remaining fuel in the fuel tank and transmit a signal to the dashboard of the vehicle so that the dashboard can display the remaining fuel. At present, when using an oil level sensor to measure the amount of fuel in an automotive fuel tank, a commonly used oil level sensor adopts a structure in which a float drives a sliding piece to slide on a resistance piece, and corresponding resistance values are output by the movement of the float at different oil liquid levels. For example, a patent with the application number CN202020828165.9 discloses the structure of a float rod grounded type oil level sensor. Such an oil level sensor with a float rod often occupies a relatively large amount of space, which will inevitably lead to a relatively large volume of the fuel tank. The fuel tank will occupy a relatively large amount of space in the vehicle. When the vehicle is relatively small or the remaining space for installing the fuel tank on the vehicle is small, a smaller fuel tank has to be used. However, the float and the float connecting rod of the oil level sensor with a float rod often span a relatively large area and cannot be installed in a fuel tank with a small volume. Therefore, there is an urgent need for an oil level sensor that can save space. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a sealed straight cylinder type oil level sensor, which solves the problems existing in the prior art. The oil level sensor of the present utility model arranges the float assembly on the flange bracket to form a straight cylinder type, which can be directly placed and only occupies space in the vertical direction, greatly saving the overall space. It can be applied to fuel tanks with small volumes, greatly improving the flexibility of use. And through the setting of the inner magnet and the outer magnet, the sealing performance of the oil level sensor is greatly improved, thereby well protecting the oil level sensor and increasing its service life.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the present utility model provides the following technical solution: A sealed straight cylinder type oil level sensor, comprising a flange bracket and a sealing cover plate. A cavity is provided between the flange bracket and the sealing cover plate. A resistance piece and a conductor are arranged in the cavity. Both the resistance piece and the conductor are connected with a terminal wire harness assembly and a brush piece assembly. The brush piece assembly is fixed on the inner side of a brush piece bracket. The brush piece bracket is slidably connected with the inner wall of the cavity. An inner magnet is fixed on the outer side of the brush piece bracket. An outer magnet opposite to the inner magnet is arranged outside the sealing cover plate. The outer magnet is fixed on the float assembly. The float assembly is slidably connected with the flange bracket.

[0007] Preferably, the flange bracket includes an arc bracket. A cavity is formed in the arc bracket. The cavity is rectangular, and a rectangular frame is fixed on its edge. A sealing cover plate is fixed on the rectangular frame. A limiting block is fixed near the lower end of the arc bracket, and a flange plate is fixed at the top of the arc bracket.

[0008] Preferably, the terminal wire harness assembly includes terminals fixed at the tops of the resistance sheet and the conductor. The terminals penetrate through the top of the arc bracket and the flange plate, and a wire harness is connected to the terminals.

[0009] Preferably, the float assembly includes an upper bracket. A lower bracket is fixed to the upper bracket, and a plurality of floats are fixed between the upper bracket and the lower bracket.

[0010] Preferably, the upper bracket includes an upper sliding plate sleeved on the arc bracket. A first socket hole matching the arc bracket is formed in the upper sliding plate. A plurality of connecting pieces connected to the lower bracket are fixed on the upper sliding plate. The connecting pieces are L-shaped. The lower bracket includes a lower sliding plate fixedly connected to the connecting pieces. A second socket hole symmetrically arranged with the first socket hole up and down is formed in the lower sliding plate. A plurality of partition plates are evenly fixed on the lower sliding plate, and a float is fixed between adjacent partition plates.

[0011] Preferably, both the inner magnet and the outer magnet are T-shaped.

[0012] Preferably, a first limiting block, a second limiting block and a third limiting block are fixed on the brush piece bracket, and the inner magnet is fixed between the first limiting block, the second limiting block and the third limiting block.

[0013] Preferably, the brush piece assembly is riveted on the brush piece bracket through rivets, and a first brush piece and a second brush piece are arranged on the brush piece assembly. The first brush piece is in contact with the resistance sheet, and the second brush piece is in contact with the conductor.

[0014] (III) Beneficial effects

[0015] By arranging the float assembly on the flange bracket, the utility model forms a straight cylinder type, which can be directly put in, only occupies space in the vertical direction, greatly saves the overall space, can be applied to a fuel tank with a small volume, and greatly improves the flexibility of use. In addition, the oil level sensor seals the cavity well through the sealing cover plate, thereby protecting the components in the cavity well, increasing its service life, and at the same time, through the arrangement of the inner magnet and the outer magnet inside and outside the sealing cover plate, effective and accurate transmission is carried out without affecting the sealing performance. Brief description of the drawings

[0016] Figure 1 is the overall schematic diagram of the utility model.

[0017] Figure 2 is the utility model Figure 1 schematic diagram after removing the sealing cover plate.

[0018] Figure 3 This is a schematic diagram of the present utility model after removing the sealing cover plate.

[0019] Figure 4 This is a schematic diagram of the brush assembly and the brush holder of the present utility model.

[0020] Figure 5 This is a schematic diagram of the brush holder, the inner magnet, the first limit block, the second limit block and the third limit block of the present utility model.

[0021] Figure 6 This is an overall schematic diagram of the flange bracket of the present utility model.

[0022] Figure 7 This is a schematic diagram of the terminal wire harness assembly of the present utility model.

[0023] Figure 8 This is a schematic diagram of the float assembly and the outer magnet of the present utility model.

[0024] Figure 9 This is the present utility model Figure 8 disassembly schematic diagram.

[0025] Figure 10 This is a schematic diagram of the brush assembly of the present utility model.

[0026] In the figure: 1 - flange bracket, 2 - sealing cover plate, 3 - cavity, 4 - resistance sheet, 5 - conductor, 6 - terminal wire harness assembly, 7 - brush assembly, 8 - brush holder, 9 - inner magnet, 10 - outer magnet, 11 - float assembly, 12 - arc bracket, 13 - rectangular frame, 14 - limit block, 15 - flange, 16 - terminal, 17 - wire harness, 18 - upper bracket, 19 - lower bracket, 20 - float, 21 - upper slide plate, 22 - first socket hole, 23 - connecting piece, 24 - lower slide plate, 25 - second socket hole, 26 - partition board, 27 - first limit block, 28 - second limit block, 29 - third limit block, 30 - rivet, 31 - first brush piece, 32 - second brush piece. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be described clearly and completely in conjunction with the accompanying Figure 1-10 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 of 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.

[0028] The utility model provides a technical solution: a sealed straight - tube type oil - level sensor, which includes a flange bracket 1 and a sealing cover plate 2. There is a cavity 3 between the flange bracket 1 and the sealing cover plate 2. A resistance sheet 4 and a conductor 5 are arranged in the cavity 3. Both the resistance sheet 4 and the conductor 5 are connected with a terminal wire harness assembly 6 and a brush assembly 7. The brush assembly 7 is fixed on the inner side of a brush bracket 8. The brush bracket 8 is slidably connected with the inner wall of the cavity 3. An inner magnet 9 is fixed on the outer side of the brush bracket 8. An outer magnet 10 opposite to the inner magnet 9 is arranged outside the sealing cover plate 2. The outer magnet 10 is fixed on a float assembly 11. The float assembly 11 is slidably connected with the flange bracket 1. During operation, the oil - level sensor is vertically placed in the fuel tank of an automobile. When the fuel tank is full of oil, the float assembly is located at the top of the flange bracket 1. During the process of the automobile consuming fuel while driving, as the gasoline liquid level in the fuel tank drops, the float assembly 11 drops accordingly. During the dropping process of the float assembly 11, the outer magnet 10 fixed on it is driven to drop. During the dropping process of the outer magnet 10, the inner magnet 9 opposite to it is driven to drop. Among them, the outer magnet 10 mainly drives the inner magnet 9 to drop synchronously by the suction force between it and the inner magnet 9. The dropping of the inner magnet 9 drives the brush bracket 8 and the brush assembly 7 to drop, thereby enabling the brush assembly 7 to slide on the resistance sheet 4, and then changing the resistance value of the resistance sheet 4. The change in the resistance value is converted into a change in the potential signal through the terminal wire harness assembly 6, 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 6 is connected with an oil - level gauge. In the utility model, the float assembly 11 is arranged on the flange bracket 1 to form a straight - tube type, which can be directly placed and only occupies space in the vertical direction, greatly saving the overall space, being applicable to fuel tanks with small volumes, and greatly improving the flexibility of use. In addition, the oil - level sensor seals the cavity 3 well through the sealing cover plate 2, thereby protecting the components in the cavity 3 well, increasing its service life. At the same time, through the arrangement of the inner magnet 9 and the outer magnet 10 inside and outside the sealing cover plate 2, effective and precise transmission is carried out without affecting the sealing performance.

[0029] The flange bracket 1 includes an arc - shaped bracket 12. A cavity 3 is formed on the arc - shaped bracket 12. The cavity 3 is set to be rectangular, and a rectangular frame 13 is fixed on its edge. The sealing cover plate 2 is fixed on the rectangular frame 13. A limit block 14 is fixed near the lower end of the arc - shaped bracket 12. A flange plate 15 is fixed at the top of the arc - shaped bracket 12. Among them, setting the cavity 3 to be rectangular facilitates the fixation of the resistance sheet 4 and the conductor. The setting of the rectangular frame 13 facilitates the installation of the sealing cover plate 2. Among them, the limit block 14 is set to be two pieces. When the bottom surface of the float assembly 11 touches the limit block 14, it can no longer continue to drop, preventing the float assembly 11 from detaching from the arc - shaped bracket 12. Among them, the flange plate 15 plays an upward - limit role for the float assembly 11.

[0030] The terminal wire harness assembly 6 includes a terminal 16 fixed to the tops of the resistor sheet 4 and the conductor 5. The terminal 16 passes through the top of the arc-shaped bracket 12 and the flange 15. A wire harness 17 is connected to the terminal 16. A through hole through which the terminal wire harness assembly 6 passes is provided on the flange 15, and the through hole is sealed.

[0031] The float assembly 11 includes an upper bracket 18. A lower bracket 19 is fixed to the upper bracket 18. A plurality of floats 20 are fixed between the upper bracket 18 and the lower bracket 19. By the arrangement of the floats 20, it is ensured that the entire float assembly 11 always floats on the gasoline liquid surface.

[0032] The upper bracket 18 includes an upper sliding plate 21 sleeved on the arc-shaped bracket 12. A first socket hole 22 matching the arc-shaped bracket 12 is provided on the upper sliding plate 21. A plurality of connecting members 23 connected to the lower bracket 19 are fixed on the upper sliding plate 21. The connecting members 23 are L-shaped. The lower bracket 19 includes a lower sliding plate 24 fixedly connected to the connecting members 23. A second socket hole 25 symmetrically arranged with the first socket hole 22 up and down is provided on the lower sliding plate 24. A plurality of partition plates 26 are evenly fixed on the lower sliding plate 24. The floats 20 are fixed between adjacent partition plates 26. By this arrangement, not only the fixing effect is good, but also the buoyancy received by the entire float assembly 11 is more uniform, thereby improving the overall accuracy of the oil level sensor.

[0033] Both the inner magnet 9 and the outer magnet 10 are arranged in a T shape, so that the final fixing effect of the inner magnet 9 and the outer magnet 10 can be better.

[0034] A first limit block 27, a second limit block 28 and a third limit block 29 are fixed on the brush holder 8. The inner magnet 9 is fixed between the first limit block 27, the second limit block 28 and the third limit block 29. The T-shaped inner magnet 9 is well limited and fixed by the arrangement of the first limit block 27, the second limit block 28 and the third limit block 29. The outer magnet 10 is also fixed by a similar structure.

[0035] The brush assembly 7 is riveted to the brush holder 8 by a rivet 30. A first brush 31 and a second brush 32 are arranged on the brush assembly 7. The first brush 31 is in contact with the resistor sheet 4, and the second brush 32 is in contact with the conductor 5. A closed loop can be formed by this arrangement.

[0036] Working principle: During operation, the oil level sensor is vertically placed in the fuel tank of the vehicle. When the fuel tank is full, the float assembly is located at the top of the flange bracket 1. During the process of fuel consumption when the vehicle is running, as the gasoline liquid level in the fuel tank drops, the float assembly 11 also drops accordingly. During the dropping process of the float assembly 11, it drives the external magnet 10 fixed on it to drop. During the dropping process of the external magnet 10, it drives the internal magnet 9 opposite to it to drop. Among them, the external magnet 10 mainly drives the internal magnet 9 to drop synchronously by the suction force between it and the internal magnet 9. The dropping of the internal magnet 9 drives the brush holder 8 and the brush assembly 7 to drop, thereby causing the brush assembly 7 to slide on the resistance sheet 4, and then changing the resistance value of the resistance sheet 4. The change in the resistance value is converted into a change in the potential signal through the terminal wire harness assembly 6, and the potential signal is reflected on the fuel gauge and converted into the scale on the fuel gauge according to a certain ratio. Among them, the terminal wire harness assembly 6 is connected to the fuel gauge. In the present utility model, the float assembly 11 is arranged on the flange bracket 1 to form a straight cylinder type, which can be directly placed and only occupies space in the vertical direction, greatly saving the overall space and being applicable to fuel tanks with small volumes, thus greatly improving the flexibility of use. In addition, the oil level sensor seals the cavity 3 well through the sealing cover plate 2, thereby protecting the components in the cavity 3 well, increasing its service life. At the same time, the setting of the internal magnet 9 and the external magnet 10 inside and outside the sealing cover plate 2 enables effective and precise transmission without affecting the sealing performance.

[0037] 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 straight-tube oil level sensor, characterized in that, It includes a flange bracket (1) and a sealing cover plate (2). A cavity (3) is provided between the flange bracket (1) and the sealing cover plate (2). A resistance sheet (4) and a conductor (5) are provided in the cavity (3). Both the resistance sheet (4) and the conductor (5) are connected with a terminal wire harness assembly (6) and a brush assembly (7). The brush assembly (7) is fixed to the inner side of a brush bracket (8). The brush bracket (8) is slidably connected to the inner wall of the cavity (3). An inner magnet (9) is fixed to the outer side of the brush bracket (8). An outer magnet (10) opposite to the inner magnet (9) is provided outside the sealing cover plate (2). The outer magnet (10) is fixed to a float assembly (11). The float assembly (11) is slidably connected to the flange bracket (1).

2. The sealed straight cylindrical oil level sensor according to claim 1, characterized in that The flange bracket (1) includes an arc-shaped bracket (12). The cavity (3) is formed in the arc-shaped bracket (12). The cavity (3) is rectangular in shape, and a rectangular frame (13) is fixed to its edge. The sealing cover plate (2) is fixed to the rectangular frame (13). A limiting block (14) is fixed near the lower end of the arc-shaped bracket (12). A flange plate (15) is fixed to the top of the arc-shaped bracket (12).

3. The sealed straight barrel type oil level sensor according to claim 2, characterized in that, The terminal wire harness assembly (6) includes terminals (16) fixed to the tops of the resistance sheet (4) and the conductor (5). The terminals (16) penetrate through the top of the arc-shaped bracket (12) and the flange plate (15). A wire harness (17) is connected to the terminals (16).

4. The sealed straight cylindrical oil level sensor according to claim 2, characterized in that, The float assembly (11) includes an upper bracket (18). The upper bracket (18) is fixed with a lower bracket (19). A plurality of floats (20) are fixed between the upper bracket (18) and the lower bracket (19).

5. A sealed straight cylindrical oil level sensor according to claim 4, characterized in that, The upper bracket (18) includes an upper sliding plate (21) sleeved on the arc-shaped bracket (12). A first socket hole (22) matching the arc-shaped bracket (12) is formed in the upper sliding plate (21). A plurality of connecting pieces (23) connected to the lower bracket (19) are fixed to the upper sliding plate (21). The connecting pieces (23) are L-shaped. The lower bracket (19) includes a lower sliding plate (24) fixedly connected to the connecting pieces (23). A second socket hole (25) symmetrically located above and below the first socket hole (22) is formed in the lower sliding plate (24). A plurality of partition plates (26) are evenly fixed to the lower sliding plate (24). The floats (20) are fixed between adjacent partition plates (26).

6. The sealed straight cylindrical oil level sensor according to claim 1, characterized in that, Both the inner magnet (9) and the outer magnet (10) are T-shaped.

7. A sealed straight cylindrical oil level sensor according to claim 6, characterized in that, A first limiting block (27), a second limiting block (28) and a third limiting block (29) are fixed to the brush bracket (8). The inner magnet (9) is fixed between the first limiting block (27), the second limiting block (28) and the third limiting block (29).

8. The sealed straight tube type oil level sensor according to claim 1, wherein, The brush assembly (7) is riveted to the brush holder (8) by a rivet (30), and a first brush (31) and a second brush (32) are provided on the brush assembly (7). The first brush (31) is in contact with the resistance sheet (4), and the second brush (32) is in contact with the conductor (5).

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