Automobile expansion tank liquid level sensor and sensor assembly

Abstract

The utility model relates to a liquid level sensor, in particular to an automobile expansion tank liquid level sensor and a sensor assembly, which comprise a detection seat, a detection rod arranged on the detection seat, and a first sealing ring arranged on the detection rod and propped against the detection seat, and the detection rod passes through the discharge hole, so that water vapor between the detection rod and the detection seat is discharged from the discharge hole. According to the liquid level sensor of the automobile expansion tank, water vapor entering the position between the detection rod and the detection base is discharged through the discharge hole, the water vapor can be effectively prevented from entering a wiring harness behind the detection base, and the safety and reliability of the liquid level sensor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a liquid level sensor, especially an automobile expansion tank liquid level sensor and sensor assembly. BACKGROUND

[0002] The automobile expansion tank needs to detect the liquid level inside in real time, and the existing liquid level sensor comprises two detection rods, a detection seat connected with the detection rods, a sealing ring installed on the detection rod and a wire harness connected with the tail of the detection rod and the detection seat. The detection seat is inserted into the socket of the expansion tank, the detection rod passes through the detection hole of the socket and enters the inside of the expansion tank, and the sealing ring is abutted on the detection hole to realize sealing. Since the internal pressure of the expansion tank is large, the leakage between the sealing ring and the detection hole is prone to occur, the water vapor enters the inside of the socket, and the water vapor enters the inside of the wire harness behind the detection seat along the gap between the detection rod and the detection seat after long time work, which affects the safety and reliability. SUMMARY

[0003] To solve the above problems, the utility model provides an automobile expansion tank liquid level sensor, and the specific technical scheme is as follows:

[0004] An automobile expansion tank liquid level sensor, comprising a detection seat, a detection rod arranged on the detection seat, and a first sealing ring arranged on the detection rod and abutted on the detection seat, wherein a discharge hole is arranged on the detection seat, and the detection rod passes through the discharge hole, so that the water vapor between the detection rod and the detection seat is discharged from the discharge hole.

[0005] Preferably, the diameter or width of the discharge hole is larger than the diameter of the detection rod.

[0006] Further, the discharge hole is a through hole.

[0007] Preferably, the automobile expansion tank liquid level sensor further comprises a second sealing ring arranged on the detection seat and inserted into a second sealing hole of the socket.

[0008] Preferably, a buckle is arranged on the detection seat and used for clamping a clamping groove of the socket.

[0009] Preferably, a circular arc head is arranged on one side of the detection seat, and a flat head is arranged on the other side.

[0010] An automobile expansion tank liquid level sensor assembly, comprising: the automobile expansion tank liquid level sensor; and a socket arranged on the expansion tank and provided with a slot, a discharge hole communicated with the slot, a first sealing hole arranged at the bottom of the slot and a detection hole arranged at the bottom of the first sealing hole; wherein the detection seat is inserted into the slot, the detection rod is inserted into the detection hole, the first sealing ring is inserted into the first sealing hole, and the discharge hole is communicated with the discharge hole through the slot.

[0011] Preferably, the socket is further provided with a second sealing hole, the second sealing hole is located between the insertion slot and the first sealing hole, and the second sealing ring on the detection seat is inserted into the second sealing hole.

[0012] Preferably, one side of the insertion slot is a circular arc slot, and the other side of the insertion slot is a flat slot.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The liquid level sensor for an automobile expansion water tank provided by the utility model can discharge the water vapor between the detection rod and the detection seat through the discharge hole, can effectively avoid the water vapor from entering the wire harness behind the detection seat, and improves the safety and reliability of the liquid level sensor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a first perspective view of the liquid level sensor;

[0016] Figure 2 is a second perspective view of the liquid level sensor;

[0017] Figure 3 is a sectional view of the liquid level sensor;

[0018] Figure 4 is an enlarged view of a part of the liquid level sensor;

[0019] Figure 5 is a structural schematic view of the sensor assembly;

[0020] Figure 6 is a sectional view of the sensor assembly;

[0021] Figure 7 is a structural schematic view of the socket;

[0022] Figure 8 is a sectional view of the socket;

[0023] Figure 9 is a top view of the socket. DETAILED DESCRIPTION

[0024] The utility model will be further described in combination with the drawings.

[0025] As Figures 1 to 4As shown, a kind of automobile expansion tank liquid level sensor, including detection seat 2, detection rod 3 and first sealing ring 41, detection rod 3 is fixed on detection seat 2, and first sealing ring 41 is inserted on detection rod 3, and it is against detection seat 2.Detection seat 2 is also provided with discharge hole 22, and detection rod 3 passes through discharge hole 22, to make the water vapor between detection rod 3 and detection seat 2 from discharge hole 22 discharge.First sealing ring 41 is inserted in the first sealing hole 14 of socket 1, and the sealing between detection rod 3 and socket 1 is realized.

[0026] Detection seat 2 and detection rod 3 are integrally injection molded, and detection rod 3 is a metal rod, as an insert in the inside of detection seat 2.Due to injection molding, gap will gradually be generated between detection rod 3 and detection seat 2 in long-term pressure working environment, and the water vapor between detection rod 3 and detection seat 2 after detection rod 3 passes through detection hole 15 will enter discharge hole 22, and then discharge through discharge hole 22, to avoid the water vapor entering the wire harness behind detection seat 2 through the gap between detection rod 3 and detection seat 2, improve the safety and reliability of sensor, and the existing sensor is changed little, with good practicability.

[0027] In order to further improve the effect of discharging water vapor, the diameter or width of discharge hole 22 is greater than the diameter of detection rod 3.The part of detection rod 3 in discharge hole 22 is completely not in contact with detection seat 2, to avoid the gap between detection rod 3 and detection seat 2 above discharge hole 22, which can effectively prevent water vapor from penetrating upward.

[0028] In order to facilitate the discharge of water vapor, discharge hole 22 is a through hole.

[0029] In order to further improve the sealing between sensor and socket 1, second sealing ring 42 is further included, second sealing ring 42 is installed on detection seat 2, second sealing ring 42 is inserted in the second sealing hole 13 of socket 1, to form the second sealing, and the sealing effect is enhanced.In order to facilitate the installation of second sealing ring 42, sealing column 23 is provided on detection seat 2, sealing groove 231 is provided on sealing column 23, and second sealing ring 42 is installed in sealing groove 231.The diameter of second sealing ring 42 is greater than the diameter of first sealing ring 41, to ensure the sealing effect.

[0030] In order to facilitate the fixation of sensor, buckle 21 is provided on detection seat 2, buckle 21 is provided along the outer ring of detection seat 2, buckle 21 is matched with the clamping groove 12 in the inside of socket 1, and is used in the clamping groove 12 of socket 1, to realize the fixation of detection seat 2.

[0031] In order to prevent the insertion error of sensor into socket 1, one side of detection seat 2 is provided with circular arc head 28, the other side of detection seat 2 is flat head 27, and the shape of socket 1 is matched with the shape of detection seat 2, which can effectively prevent the insertion error of detection seat 2.

[0032] As Figures 5 to 9 The utility model provides an automobile expansion tank liquid level sensor assembly, which comprises an automobile expansion tank liquid level sensor and a socket 1, the socket 1 is arranged on the expansion tank, the socket 1 is integrally injection molded with the expansion tank, the socket 1 is provided with a slot 11, a drain hole 16, a first sealing hole 14 and a detection hole 15, the slot 11 is arranged at the top of the socket 1, the slot 11 is matched with a detection seat 2, is used for inserting the detection seat 2, the bottom of the slot 11 is provided with the first sealing hole 14, the bottom of the first sealing hole 14 is provided with the detection hole 15, the first sealing hole 14 and the detection hole 15 are coaxially arranged, and are stepped holes; the drain hole 16 is arranged at one side of the socket 1 and communicates with the slot 11, and can drain the water vapor in the slot 11. A detection rod 3 is inserted in the detection hole 15, a first sealing ring 41 is inserted in the first sealing hole 14, and a drain hole 22 communicates with the drain hole 16 through the slot 11.

[0033] In order to improve the sealing property, the socket 1 is further provided with a second sealing hole 13, the second sealing hole 13 is located between the slot 11 and the first sealing hole 14, that is, the second sealing hole 13, the first sealing hole 14 and the detection hole 15 are sequentially arranged from top to bottom, and the diameters are sequentially reduced, and a second sealing ring 42 on the detection seat 2 is inserted in the second sealing hole 13.

[0034] One side of the slot 11 is a circular arc groove 17, and the other side is a flat mouth groove 18, the circular arc groove 17 is matched with a circular arc head 28 on one side of the detection seat 2; the flat mouth groove 18 is matched with a flat head 27 on the other side of the detection seat 2.

[0035] The technical principle of the utility model is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be explained as the limitation of the protection scope of the utility model in any way. Based on the explanation herein, the person skilled in the art can think of other specific embodiments of the utility model without creative labor, and these embodiments will fall within the protection scope of the claims of the utility model.

Claims

1. A liquid level sensor for an automobile expansion tank, comprising a detection seat (2), a detection rod (3) arranged on the detection seat (2), and a first sealing ring (41) arranged on the detection rod (3) and abutting against the detection seat (2), characterized in that, The detection seat (2) is provided with an exhaust hole (22), and the detection rod (3) passes through the exhaust hole (22) so that the water vapor between the detection rod (3) and the detection seat (2) is exhausted from the exhaust hole (22).

2. The liquid level sensor for an expansion tank of an automobile according to claim 1, characterized by The diameter or width of the exhaust hole (22) is greater than the diameter of the detection rod (3).

3. The liquid level sensor for an expansion tank of an automobile according to claim 1, wherein The exhaust hole (22) is a through hole.

4. A liquid level sensor for an expansion tank of a motor vehicle according to any one of claims 1 to 3, characterized in that Further comprising: A second sealing ring (42) is arranged on the detection seat (2) and is inserted into a second sealing hole (13) of the socket (1).

5. The liquid level sensor for an automotive expansion tank according to claim 1, characterized by, The detection seat (2) is provided with a buckle (21) for clamping in a clamping groove (12) of the socket (1).

6. The liquid level sensor for an automotive expansion tank according to claim 1, wherein One side of the detection seat (2) is provided with a circular arc head (28), and the other side is provided with a flat head (27).

7. An automotive expansion tank liquid level sensor assembly characterized by, Further comprising: The liquid level sensor of the automobile expansion tank according to claim 1; and The socket (1) is arranged on the expansion tank and is provided with a slot (11), a drainage hole (16) communicating with the slot (11), a first sealing hole (14) arranged at the bottom of the slot (11), and a detection hole (15) arranged at the bottom of the first sealing hole (14). The detection seat (2) is inserted into the slot (11), the detection rod (3) is inserted into the detection hole (15), the first sealing ring (41) is inserted into the first sealing hole (14), and the exhaust hole (22) communicates with the drainage hole (16) through the slot (11).

8. An automotive expansion tank liquid level sensor assembly according to claim 7, wherein, The socket (1) is further provided with a second sealing hole (13) located between the slot (11) and the first sealing hole (14), and a second sealing ring (42) on the detection seat (2) is inserted into the second sealing hole (13).

9. An automotive expansion tank liquid level sensor assembly according to claim 7, wherein, One side of the slot (11) is a circular arc slot (17) matched with the circular arc head (28) on one side of the detection seat (2), and the other side of the slot (11) is a flat slot (18) matched with the flat head (27) on the other side of the detection seat (2).

Images