Bottom fixing structure of liquid level sensor

Abstract

The utility model provides a bottom fixing structure of a liquid level sensor. The bottom fixing structure comprises an electronic tube, a bottom plug and a filter screen main body, a mounting hole for mounting a sensor detection part of the liquid level sensor is formed in the electronic tube; the bottom plug is fixed to the outer side of the bottom of the electronic tube and blocks the bottom of the mounting hole, the filter screen body is provided with a containing cavity extending from the top to the bottom, and the bottom plug is fixed to the bottom of the containing cavity. The bottom plug is fixed on the outer side of the bottom of the electronic tube, and the bottom plug does not need to be inserted into a mounting hole in the electronic tube, so that a sensor detection part of a liquid level sensor assembled in the mounting hole in the electronic tube can be close to the bottom to the maximum extent, and the lowest detection liquid level point of a product is greatly reduced. And secondly, by optimizing the bottom structure of the filter screen main body and the structure of the bottom plug, the effective fixation of the filter screen main body and the bottom plug is directly realized under the condition that fixing parts such as screws or blind rivets are not needed, and the assembly cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of liquid level sensor technology, and in particular to a bottom fixing structure for a liquid level sensor. Background Technology

[0002] A fuel level sensor, also known as a fuel liquid level sensor, is a device used to measure the amount of fuel (or other liquid) in a container. It converts the fuel level (mechanical change) into an electrical signal, which is transmitted to the dashboard or control system to display the remaining fuel level (such as a car fuel gauge).

[0003] The commonly used multi-tube oil level sensor vacuum tube bottom fixing structure has the following two disadvantages:

[0004] I. For example Figure 1 and Figure 2 As shown, at the bottom position of the existing multi-tube oil level sensor 200, the bottom plug 201 is inserted into the electron tube 202. Simultaneously, to ensure the bottom plug 201 is assembled and fixed with the pull stud 203 or nut 204, the bottom plug 201 has a height requirement within the electron tube 202. This results in the sensor detection component 301 inside the electron tube 202 not being able to approach the bottom of the product as closely as possible. This bottom structure leads to a higher minimum detection point for the sensor product. Figure 2 (H1 is the height of the lowest detection point of the sensor product), which cannot meet the customer's high requirement for zero liquid level.

[0005] II. Figure 3 and Figure 4 The figures shown are exploded views of two embodiments of the existing multi-tube oil level sensor 200. The commonly used bottom-fixed electron tube structure requires four parts: electron tube 202, bottom plug 201, pull pin 203 (or nut 204 or screw) and filter body 205. This results in a large number of parts and high assembly costs.

[0006] Therefore, it is necessary to provide at least one bottom fixing structure for the liquid level sensor, so that the sensor detection component inside the product's electron tube can be as close as possible to the bottom of the product, significantly reducing the minimum detection liquid level point of the product. Utility Model Content

[0007] The purpose of this invention is to provide a bottom fixing structure for a liquid level sensor, which allows the sensor detection component inside the product's electron tube to be as close as possible to the bottom of the product, thereby significantly reducing the minimum detection liquid level point of the product.

[0008] To achieve the above objectives, this utility model provides a bottom fixing structure for a liquid level sensor, including an electron tube, a bottom plug, and a filter body; the electron tube has an internal mounting hole for mounting the sensor detection component of the liquid level sensor; the bottom plug is fixed to the outside of the bottom of the electron tube and seals the bottom of the mounting hole, and the filter body has a receiving cavity extending from its top to its bottom, and the bottom plug is fixed to the bottom of the receiving cavity.

[0009] Preferably, the bottom plug is welded to the outer bottom of the electron tube.

[0010] Preferably, the bottom plug is provided with a receiving groove, and the bottom of the electron tube is inserted into the receiving groove.

[0011] Preferably, the receiving groove includes a recessed portion and an annular groove portion, the recessed portion is formed on the top of the bottom plug, the annular groove portion is disposed below the annular groove portion and communicates with the recessed portion, and the bottom of the electron tube passes through the recessed portion and is inserted into the annular groove portion.

[0012] Preferably, the bottom of the accommodating cavity is provided with a locking structure, which engages with the bottom plug to fix the bottom plug to the filter body.

[0013] Preferably, the engaging structure includes at least two latches arranged at intervals along a circumferential direction at the bottom of the receiving cavity, the latches and the bottom of the receiving cavity forming an engaging space, and the bottom plug engaging within the engaging space.

[0014] Preferably, the buckle includes a main body and a fastening part. The main body is fixed to the bottom of the receiving cavity, and the fastening part protrudes from the top inner side of the main body. The fastening space is formed between the bottom of the receiving cavity and the main body and the fastening part of each buckle.

[0015] Preferably, there is a gap between the outer wall of the main body and the inner wall of the accommodating cavity.

[0016] Preferably, the filter body is provided with a positioning hole communicating with the bottom of the engaging space, and the bottom plug is also inserted into the positioning hole.

[0017] Preferably, the bottom plug includes a bottom plug body and a protrusion protruding from the bottom of the bottom plug body, the bottom plug body is engaged in the engagement space, and the protrusion is inserted into the positioning hole.

[0018] Compared with existing technologies, the bottom fixing structure of the liquid level sensor in this invention fixes the bottom plug to the outside of the bottom of the electron tube, eliminating the need for the bottom plug to be inserted into the mounting hole inside the electron tube. This allows the sensor detection component of the liquid level sensor, mounted inside the mounting hole of the electron tube, to be as close to the bottom as possible, thereby significantly reducing the minimum detection liquid level point of the product. Secondly, by optimizing the bottom structure of the filter body and the bottom plug, this invention achieves effective fixing of the filter body and the bottom plug directly without the need for screws or rivets, effectively reducing assembly costs. Attached Figure Description

[0019] Figure 1 This is a 3D structural diagram of an existing multi-tube oil level sensor.

[0020] Figure 2 yes Figure 1 The cross-sectional view shown is taken at the bottom of the multi-tube oil level sensor.

[0021] Figure 3 This is an exploded view of the first embodiment of an existing multi-tube oil level sensor.

[0022] Figure 4 This is an exploded view of a second embodiment of an existing multi-tube oil level sensor.

[0023] Figure 5 This is a three-dimensional structural diagram of the bottom fixing structure of the liquid level sensor of this utility model.

[0024] Figure 6 yes Figure 5 The cross-sectional view of the structure shown.

[0025] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0026] Figure 8 yes Figure 5 An exploded view of the structure shown.

[0027] Figure 9 yes Figure 8 Enlarged view of point B in the middle. Detailed Implementation

[0028] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] Please see Figures 5 to 7The liquid level sensor bottom fixing structure 100 of this utility model includes an electron tube 1, a bottom plug 2, and a filter body 3; the electron tube 1 is provided with a mounting hole 11 for mounting the sensor detection component 301 of the liquid level sensor; the bottom plug 2 is fixed to the bottom outside of the electron tube 1 and seals the bottom of the mounting hole 11, and the filter body 3 is provided with a receiving cavity 31 extending from its top to its bottom, and the bottom plug 2 is fixed to the bottom of the receiving cavity 31.

[0030] The bottom fixing structure 100 of the liquid level sensor of this utility model fixes the bottom plug 2 to the outside of the bottom of the electron tube 1, eliminating the need for the bottom plug 2 to be inserted into the mounting hole 11 inside the electron tube 1. This allows the sensor detection component 301 of the liquid level sensor assembled in the mounting hole 11 inside the electron tube 1 to be as close to the bottom as possible, thereby significantly reducing the minimum detection liquid level point of the product.

[0031] like Figure 2 The figure shows a cross-sectional view of the bottom position of the multi-pipe oil quantity sensor, where H1 represents the height of the lowest detection point of its sensor detection component 301; as shown... Figure 7 The image shown is a partially enlarged cross-sectional view of the bottom fixing structure 100 of the liquid level sensor of this utility model, where H2 represents the height of the lowest detection point of its sensor detection component 301. Figure 2 H1 and Figure 7 As can be seen from the comparison of H2, the bottom fixing structure 100 of the liquid level sensor of this utility model can make the sensor detection component 301 as close to the bottom as possible, which greatly reduces the minimum detection liquid point of the product.

[0032] In one embodiment, the bottom plug 2 is welded to the outer bottom of the electron tube 1. However, this is not a limitation. For example, in other alternative embodiments, the bottom plug 2 may also be fixed to the outer bottom of the electron tube 1 by an adhesive structure.

[0033] Please see Figure 7 In one embodiment, the bottom plug 2 is provided with a receiving groove 21, and the bottom of the electron tube 1 is inserted into the receiving groove 21. Specifically, the receiving groove 21 includes a recessed portion 211 and an annular groove portion 212. The recessed portion 211 is formed on the top of the bottom plug 2, and the annular groove portion 212 is disposed below the annular groove portion 212 and communicates with the recessed portion 211. The bottom of the electron tube 1 passes through the recessed portion 211 and is inserted into the annular groove portion 212.

[0034] Please see Figures 7 to 9In one embodiment, the bottom of the receiving cavity 31 is provided with a locking structure 32, which engages with the bottom plug 2 to fix the bottom plug 2 to the filter body 3. This achieves effective fixation of the filter body 3 and the bottom plug 2 directly without the need for screws or rivets. Specifically, the locking structure 32 includes at least two latches 321 arranged at intervals along a circumferential direction at the bottom of the receiving cavity 31. The latches 321 and the bottom of the receiving cavity 31 form a locking space 322, within which the bottom plug 2 engages. In this embodiment, the number of latches 321 is three, but this is not a limitation. More specifically, the buckle 321 includes a main body 321a and a fastening part 321b. The main body 321a is fixed to the bottom of the receiving cavity 31, and the fastening part 321b protrudes from the top inner side of the main body 321a. The engaging space 322 is formed between the bottom of the receiving cavity 31 and the main body 321a and the fastening part 321b of each buckle 321.

[0035] Please see Figure 7 In one embodiment, a gap 323 is provided between the outer wall of the main body 321a and the inner wall of the receiving cavity 31. By providing a gap 323 between the outer wall of the main body 321a and the inner wall of the receiving cavity 31, when the bottom plug 2 is engaged in the engaging space 322, the bottom plug 2 can first push and squeeze the engaging portions 321b of each buckle 321, causing each buckle 321 to bend and deform outward toward the gap 323. After the bottom plug 2 is fully engaged in the engaging space 322, the buckles 321 can deform and return to their original shape, thereby securing the bottom plug 2 within the engaging space 322.

[0036] Please see Figures 7 to 9 In one embodiment, the filter body 3 has a positioning hole communicating with the bottom of the engaging space 322, and the bottom plug 2 is also inserted into the positioning hole. By providing the positioning hole, it is convenient to insert and position the bottom plug 2. Further, the bottom plug 2 includes a bottom plug body 21 and a protrusion 22 protruding from the bottom of the bottom plug body 21. The bottom plug body 21 engages in the engaging space 322, and the protrusion 22 is inserted into the positioning hole.

[0037] In summary, the bottom fixing structure 100 of the liquid level sensor of this utility model can fix the bottom plug 2 to the outside of the bottom of the electron tube 1 by welding or bonding, without requiring the bottom plug 2 to be inserted into the mounting hole 11 inside the electron tube 1. This allows the sensor detection component 301 of the liquid level sensor assembled in the mounting hole 11 inside the electron tube 1 to be as close to the bottom as possible, thereby significantly reducing the minimum detection liquid level point of the product. Secondly, by optimizing the bottom structure of the filter body 3 and the structure of the bottom plug 2, the bottom fixing structure 100 of the liquid level sensor of this utility model achieves effective fixing of the filter body 3 and the bottom plug 2 directly by setting a snap-fit ​​structure 32 on the filter body 3 without the need for fixing parts such as screws or rivets, effectively reducing assembly costs.

[0038] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A bottom fixing structure for a liquid level sensor, characterized in that, It includes an electron tube, a bottom plug, and a filter body; the electron tube has an internal mounting hole for mounting the sensor detection component of the liquid level sensor; the bottom plug is fixed to the bottom outside of the electron tube and seals the bottom of the mounting hole, and the filter body has a receiving cavity extending from its top to its bottom, and the bottom plug is fixed to the bottom of the receiving cavity.

2. The liquid level sensor bottom fixing structure according to claim 1, characterized in that, The bottom plug is welded to the outer bottom of the electron tube.

3. The bottom fixing structure of the liquid level sensor according to claim 1, characterized in that, The bottom plug is provided with a receiving groove, and the bottom of the electron tube is inserted into the receiving groove.

4. The liquid level sensor bottom fixing structure according to claim 3, characterized in that, The receiving groove includes a recessed portion and an annular groove portion. The recessed portion is formed on the top of the bottom plug, and the annular groove portion is disposed below the annular groove portion and communicates with the recessed portion. The bottom of the electron tube passes through the recessed portion and is inserted into the annular groove portion.

5. The bottom fixing structure of the liquid level sensor according to claim 1, characterized in that, The bottom of the accommodating cavity is provided with a locking structure, which engages with the bottom plug to fix the bottom plug to the filter body.

6. The liquid level sensor bottom fixing structure according to claim 5, characterized in that, The engaging structure includes at least two latches arranged at intervals along a circumferential direction at the bottom of the receiving cavity, the latches and the bottom of the receiving cavity forming an engaging space, and the bottom plug engaging within the engaging space.

7. The liquid level sensor bottom fixing structure according to claim 6, characterized in that, The buckle includes a main body and a fastening part. The main body is fixed to the bottom of the accommodating cavity, and the fastening part protrudes from the top inner side of the main body. The fastening space is formed between the bottom of the accommodating cavity and the main body and the fastening part of each buckle.

8. The liquid level sensor bottom fixing structure according to claim 7, characterized in that, There is a gap between the outer wall of the main body and the inner wall of the accommodating cavity.

9. The liquid level sensor bottom fixing structure according to claim 6, characterized in that, The filter body is provided with a positioning hole that communicates with the bottom of the locking space, and the bottom plug is also inserted into the positioning hole.

10. The liquid level sensor bottom fixing structure according to claim 9, characterized in that, The bottom plug includes a bottom plug body and a protrusion protruding from the bottom of the bottom plug body. The bottom plug body is engaged in the engagement space, and the protrusion is inserted into the positioning hole.

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