CN112504385A - Oil level sensor - Google Patents

Abstract

The invention provides an oil level sensor, and belongs to the technical field of machinery. The oil level sensor solves the problems of poor adaptability and low detection precision of the existing oil level sensor. This oil level sensor, which comprises a mounting base, the forced induction probe just can stretch into the filtration piece in the oil tank with setting up on the mount pad, the oil feed passageway has on the mount pad, the forced induction probe sets up in oil feed passageway department, have on the mount pad and be used for fixing the connecting piece on the oil tank lateral wall with the mount pad, filter the piece including being pipy oily portion of mistake and setting up the oil strain portion of crossing oily port department, the oil feed passageway communicates with oily portion of mistake, the oily portion of mistake can remove the length of adjusting the stretching into the oil tank and can fix a position each other after adjusting relatively the mount pad. The oil level sensor can adapt to oil tanks with different shapes, wall thicknesses and sizes, is good in applicability, and impurities in oil liquid cannot contact with the pressure sensing probe, so that corrosion is avoided, accumulation of impurities is avoided, and detection precision is guaranteed.

Description

Oil level sensor

Technical Field

The invention belongs to the technical field of machinery, and relates to an oil level sensor.

Background

The oil level sensor is a device which works in an oil tank of an automobile or a motorcycle and can transmit oil level information to an automobile instrument panel, so that automobile drivers can know the oil level information at any time.

The conventional fuel level sensor adopts a float swing arm type sensor, when the fuel level sensor works normally, a float swing arm component can be kept at a certain height in oil due to the action of self gravity and buoyancy of fuel, and when the fuel level is changed, the relative position of the float swing arm component can be changed, so that the resistance value of a resistance box is changed, the resistance box is converted into a corresponding electric signal to be transmitted to an automobile instrument system, and a driver can know the condition of the fuel level of the current automobile fuel tank in time. The sensor has the defects of more breakpoints, short service life, poor response sensitivity, unstable performance and the like.

In order to solve the above-mentioned drawbacks, people have developed a pressure-sensitive oil level sensor, such as that disclosed in chinese patent application (application No. 20132073899.0), which includes a housing and an upper cover that are fixedly and hermetically connected, an electrical receptacle assembly fixed to the upper cover is disposed on the upper cover, a control circuit board fixedly connected to the housing is disposed on a bottom plate of the housing, the control circuit board is electrically connected to the electrical receptacle assembly, a pressure-sensitive probe and a pressure-strain module are disposed on the control circuit board, an oil hole is disposed on the bottom plate of the housing at a position corresponding to the pressure-sensitive probe, the pressure-strain module converts pressure strain into a strain electrical signal, and the strain electrical signal is processed by the control conversion module and then output to.

The upper cover joint of foretell oil level sensor is fixed in the installing port department of oil tank, and the casing stretches into in the oil tank, and the pressure-sensitive probe response oil in the oil tank through the casing bottom changes, fine solution foretell problem, but it still has following defect: the whole casing of this sensor stretches into in the oil tank, in order to guarantee the required precision that detects, therefore, it can only be applicable to shape structure and the specific oil tank of degree of depth size, the suitability is poor, and pressure-sensitive probe directly stretches into in the oil tank, fluid in the oil tank more or less can have some impurity, these impurity also can get into pressure-sensitive probe department along with fluid, can cause the corruption to pressure-sensitive probe after the time has been of a specified duration, and impurity still forms easily in this department and piles up, influence pressure-sensitive probe's detection precision.

Disclosure of Invention

The invention aims to solve the problems of the prior art and provides an oil level sensor, which aims to solve the technical problems that: how to solve the problem that current oil level sensor adaptability is poor and detection accuracy is low.

The purpose of the invention can be realized by the following technical scheme: the utility model provides an oil level sensor, includes mount pad and forced induction probe, the oil feed passageway has on the mount pad, forced induction probe sets up in oil feed passageway department, a serial communication port, have on the mount pad and be used for fixing the connecting piece on the oil tank lateral wall with the mount pad, this sensor is still including setting up on the mount pad and can stretch into the filtration piece in the oil tank, filter the piece including being pipy oily portion of mistake and setting up in the oily portion of mistake and can filter impurity's oil strain portion, the oil feed passageway with oily portion of mistake communicates, the oily portion of mistake can remove the adjustment relatively and stretch into the length of oil tank and can mutual positioning after adjusting.

The oil level sensor also comprises an electric socket assembly and a control circuit board electrically connected with the pressure sensing probe, wherein the electric socket assembly is fixed on the mounting seat, the control circuit board is arranged in the mounting seat, and the oil level sensor is used for being mounted at the bottom of the side face of the oil tank or the bottom of the oil tank. This oil level sensor has made the improved design to overall structure, the mount pad can pass through the connecting piece snap-on the lateral wall of oil tank, filter and stretch into in the oil tank, fluid in the oil tank filters impurity through the oil strain portion of filtering earlier, then during the oil feed passageway is got into in the oil strain portion of rethread, through setting up the change of the oil pressure power that the pressure-sensitive probe response entering in oil feed passageway department, impurity in the fluid can not contact with pressure-sensitive probe, the corruption has been avoided, and can not cause impurity to pile up, guarantee the precision that detects yet. And the mount pad of whole sensor is fixed in the oil tank outside, only filters the piece and stretches into in the oil tank, and filters the piece and can also adjust the length of stretching into the oil tank to can adapt to various different shapes, wall thickness and the oil tank of size, the suitability is good. And filter the length that can adjust to stretch into the oil tank, that is to say, during the installation, can debug and make and be in a suitable distance between the oil strain portion of filtering the piece and the inner wall of oil tank to can avoid fine impurity deposit to lead to the condition that oil strain portion is blocked in the oil tank, further guarantee the precision of detecting.

In foretell oil level sensor, upwards convex spliced pole has on the mount pad, the oil feed passageway extends to spliced pole department and runs through the top of spliced pole, it establishes to cross the oil portion cover on the spliced pole, the inner wall of crossing the oil portion with the outer wall of spliced pole pastes and leans on, it can slide relatively the spliced pole and both can fix a position to cross the oil portion. The oil filtering part is sleeved on the connecting column, so that a telescopic pipe structure is formed between the oil filtering part and the connecting column, the oil filtering part slides relative to the connecting column by adjusting, the oil filtering part can be adjusted in the oil tank according to different shapes, wall thickness and size of a dimension during installation, the stretching length of the filtering part is adjusted, after installation, the oil filtering part of the filtering part can be kept at a proper position in the oil tank, so that adaptation to various types of oil tanks can be realized, meanwhile, the influence of impurities on detection can be effectively avoided, and the detection precision is guaranteed. Moreover, the lateral wall at the oil tank is installed to the mount pad, consequently only need guarantee that the leakproofness of mount pad and oil tank junction is as good, and is not very high to the spliced pole and the sealed requirement of crossing between the oil portion, as long as guarantee that cross oil portion inner wall and spliced pole outer wall paste prevent the impurity entering in the fluid can, processing is also more convenient.

In the oil level sensor, the mounting seat is further provided with a positioning column protruding upwards, the side wall of the oil passing part is provided with a protruding positioning part, the positioning part is sleeved on the positioning column, and the positioning part is tightly matched with the positioning column. Through the cooperation of reference column and location portion, can play the guide effect during installation is adjusted, avoid taking place the incline between oil portion and the spliced pole, adjust the completion back, can play the locate action again, make filter piece stretch into can keep suitable length of stretching into behind the oil tank, oil strain portion can keep more suitable position department in the oil tank, thereby can realize with various types of oil tank adaptations, also can effectually avoid the influence that impurity caused to detecting simultaneously, guaranteed the precision that detects.

In the oil level sensor, the positioning portion is plate-shaped, the positioning hole is formed in the positioning portion, the inner peripheral wall of the positioning hole is provided with a plurality of protruding clamping teeth, the positioning column penetrates through the positioning hole, and the plurality of clamping teeth abut against the outer peripheral wall of the positioning column to achieve tight fit. The tight fit is realized through the periphery wall of a plurality of latches of circumference and reference column, has reduced the area of contact for the operation is comparatively simple and convenient during installation regulation, but also can effectively avoid impurity deposit between the inner wall of reference column and locating hole.

In the oil level sensor, the section of the latch along the radial direction of the positioning hole is V-shaped. The design of V style of calligraphy for the outer wall of every latch and reference column is line contact, and area of contact is little, and after the tight fit, the effect of chucking is better.

In the oil level sensor, the V-shaped bent part of the latch is in arc transition. The arc transition enables the assembly to be more convenient and not easy to scratch.

In the oil level sensor, the side surface of one side of the mounting seat with the connecting column is also provided with the sealing block, and the sealing block is made of flexible materials and is attached to and sealed with the side surface of the mounting seat. Through the setting of sealed piece, can realize the sealed of mount pad and oil tank junction.

In the oil level sensor, the sealing block is further provided with a communication hole opposite to the mounting hole in the oil tank, an annular convex edge I is protruded at the edge of the communication hole along the circumferential direction, and the connecting column and the positioning column penetrate through the communication hole. The design of the annular convex edge I can better ensure the sealing effect. Meanwhile, the sealing block is provided with the communicating hole, so that even if impurities are accumulated, the impurities firstly enter the communicating hole and are accumulated at the bottom of the communicating hole, and a circle of sealing layer generated by the accumulation of the impurities is formed at the sealing connection position of the sealing block and the mounting seat in a direction-changing manner.

In the above oil level sensor, the oil filter portion has a disk shape, and the oil filter portion overlaps or covers the communication hole in an axial projection of the oil passing portion. The filter area is increased, the oil can enter the oil inlet channel more smoothly, and the detection precision is guaranteed.

In the above oil level sensor, the connecting member is a connecting bolt, the connecting bolt passes through the sealing block, and the sealing block is further provided with a second annular convex edge arranged around the connecting bolt. The mounting seat is fixed on the outer side wall of the oil tank through a connecting bolt and is compressed by a sealing block to realize sealing.

Compared with the prior art, the oil level sensor has the following advantages:

1. the mount pad of whole sensor is fixed in the oil tank outside, only filters and stretches into in the oil tank, and filters the length that can also adjust and stretch into the oil tank to can adapt to the oil tank of various different shapes, wall thickness and size of a dimension, the suitability is good.

2. Impurities in the oil liquid can not contact with the pressure sensing probe, so that corrosion is avoided, accumulation of impurities can not be caused, and detection precision is guaranteed.

3. During the installation, can debug and be in a suitable distance between the inner wall that makes the oil strain portion of filtering piece and oil tank to can avoid fine impurity deposit in the oil tank to lead to the condition that oil strain portion is blocked, further guarantee the precision of detecting.

Drawings

Fig. 1 is a perspective view of the present fuel level sensor.

Fig. 2 is a plan view of the present fuel level sender.

Fig. 3 is a schematic view showing the structure of the fuel level sensor mounted on the fuel tank.

Fig. 4 is an assembly structural view of the mount and the seal block.

Fig. 5 is a perspective view of the filter member.

In the figure, 1, a mounting seat; 1a, an oil inlet channel; 1b, connecting columns; 1c, a positioning column; 2. a pressure sensing probe; 3. a control circuit board; 4. an electrical receptacle assembly; 5. a connecting member; 6. a filter member; 6a, an oil passing part; 6b, an oil filtering part; 6c, a positioning part; 6c1, locating holes; 6c11, latch; 7. a sealing block; 7a, a communicating hole; 7b, a first annular convex edge; 7c, a second annular convex edge; 8. and an oil tank.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

The fuel level sensor is used for being installed at the bottom of the side of a motorcycle fuel tank 8 or the bottom of the fuel tank 8. As shown in fig. 1 to 5, the fuel level sensor comprises a mounting base 1, an electrical socket assembly 4, a control circuit board 3, a pressure sensing probe 2 and a filter element 6, wherein the pressure sensing probe 2 and the electrical socket assembly 4 are electrically connected with the control circuit board 3, the electrical socket assembly 4 is fixed on the mounting base 1, and the control circuit board 3 is arranged in the mounting base 1.

Specifically, the mounting base 1 is provided with a connecting piece 5 for fixing the mounting base 1 on the outer side wall of the fuel tank 8, and the connecting piece 5 is a connecting bolt. A sealing block 7 is further arranged on the side face, on one side, of the mounting seat 1, and the side face, used for being attached to the outer side wall of the oil tank 8, of the mounting seat, and the sealing block 7 is made of flexible materials and is attached to and sealed with the side face of the mounting seat 1. The sealing block 7 is also provided with a communication hole 7a opposite to the mounting hole on the oil tank 8, the edge of the communication hole 7a is provided with a first annular convex edge 7b in a protruding mode along the circumferential direction, the connecting bolt penetrates through the sealing block 7, and the sealing block 7 is also provided with a second annular convex edge 7c arranged around the connecting bolt. The mounting socket 1 is fixed at the bottom of the side of the oil tank 8 or the bottom of the oil tank 8 by a connecting bolt, and sealing is achieved by a sealing block 7.

Further, the mounting base 1 is provided with an oil inlet channel 1a, and the pressure sensing probe 2 is arranged at one end port of the oil inlet channel 1 a. The mounting seat 1 is provided with a connecting column 1b protruding upwards, and the other end of the oil inlet channel 1a extends to the connecting column 1b and penetrates through the top end of the connecting column 1 b. The mounting seat 1 is also provided with a positioning column 1c protruding upwards, and the connecting column 1b and the positioning column 1c both penetrate through the communicating hole 7 a. The filtering piece 6 comprises a tubular oil passing part 6a and an oil filtering part 6b which is arranged at the port of the oil passing part 6a and can filter impurities, one end of the oil passing part 6a is sleeved on the connecting column 1b so that the inner cavity of the oil passing part 6a is communicated with the oil inlet channel 1a, and the other end of the oil passing part 6a extends into the oil tank and is provided with the oil filtering part 6 b. The inner wall of the oil passing part 6a is attached to the outer wall of the connecting column 1b, and the oil passing part 6a can slide relative to the connecting column 1b, so that a telescopic pipe structure is formed between the oil passing part and the connecting column. The oil filtering portion 6b is disc-shaped, and along the axial projection of the oil filtering portion 6a, the oil filtering portion 6b is overlapped with the communicating hole 7a or can cover the communicating hole 7a, so that the filtering area is increased, oil can enter the oil inlet channel 1a more smoothly, and the detection precision is guaranteed.

The side wall of the oil passing part 6a is provided with a convex positioning part 6c, the positioning part 6c is plate-shaped, the positioning part 6c is provided with a positioning hole 6c1, the inner peripheral wall of the positioning hole 6c1 is provided with a plurality of convex clamping teeth 6c11, the positioning column 1c is arranged in the positioning hole 6c1 in a penetrating manner, and the plurality of clamping teeth 6c11 are abutted against the outer peripheral wall of the positioning column 1c to realize tight fit. Through the cooperation of reference column 1c and location portion 6c, can play the guide effect during the installation is adjusted, avoid crossing to take place the incline between oil portion 6a and the spliced pole 1b, adjust the back of accomplishing, can play the positioning action again. And the tight fit is realized through the periphery wall of a plurality of latches 6c11 of circumference and reference column 1c, has reduced the area of contact for the operation is comparatively simple and convenient during installation regulation, and can also effectively avoid impurity deposit between the inner wall of reference column 1c and locating hole 6c 1.

Furthermore, the section of the latch 6c11 along the radial direction of the positioning hole 6c1 is in a V shape, and the V-shaped bending part of the latch 6c11 is in arc transition, so that each latch 6c11 is in line contact with the outer wall of the positioning column 1c, the contact area is small, and the clamping effect is better after tight fit.

The oil level sensor is improved in the whole structure, the mounting seat 1 is externally arranged and is mounted at the bottom of the side surface of an oil tank 8 or the bottom surface of the oil tank 8, the filtering piece 6 extends into the oil tank, so that an oil inlet channel 1a is communicated with the inner cavity of the oil tank 8 through the filtering piece 6, namely, the oil pressure in the oil inlet channel 1a can keep consistent with the oil pressure in the oil tank 8, oil in the oil tank 8 firstly filters impurities through an oil filtering part 6b of the filtering piece 6 and then enters the oil inlet channel 1a through the oil part 6a, the pressure of the entering oil is sensed through a pressure sensing probe 2 arranged at the oil inlet channel 1a, the detected signal is transmitted to the control circuit board 3, the control circuit board 3 processes the oil pressure signal and then converts the processed oil pressure signal into a strain signal to be output to an instrument oil level to display the oil level, therefore, when the oil level in the oil, the oil pressure of the oil tank can also change, so that the oil level in the oil tank 8 can be displayed by sensing the change of the oil pressure in real time through the pressure sensing probe 2. In the testing process, impurity in the fluid can not contact with pressure-sensitive probe 2, has avoided impurity to pressure-sensitive probe 2's corruption, can not cause impurity to pile up in pressure-sensitive probe 2 department moreover yet, guarantees the precision that detects. And the mount pad 1 of whole sensor is fixed in the oil tank 8 outside, only filters piece 6 and stretches into in the oil tank 8, and filters piece 6 and can also adjust the length that stretches into the oil tank 8 to can adapt to various different shapes, wall thickness and the oil tank 8 of size, the suitability is good. Filter piece 6 simultaneously can adjust the length of stretching into the oil tank, that is to say, during the installation, can debug and make and be in a suitable distance between the inner wall of the oil strain portion 6b of filtering piece 6 and oil tank 8 to can avoid fine impurity deposit to lead to the condition that oil strain portion 6b is blocked up in the oil tank 8, further guarantee the precision of detecting.

Example two

The structure and features of this embodiment are substantially the same as those of the first embodiment, and the differences are as follows: the outer peripheral wall of the oil passing portion 6a is provided with an external thread, the inner wall of the oil inlet channel 1a is provided with an internal thread, one end of the oil passing portion 6a extends into the oil inlet channel 1a, and the oil passing portion and the oil inlet channel are connected in a threaded fit mode.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms of the mounting seat 1, the oil inlet channel 1a, the connecting column 1b, the positioning column 1c, the pressure sensing probe 2, the control circuit board 3, the electrical socket assembly 4, the connecting piece 5, the filtering piece 6, the oil passing portion 6a, the oil filtering portion 6b, the positioning portion 6c, the positioning hole 6c1, the latch 6c11, the sealing block 7, the communication hole 7a, the annular flange one 7b, the annular flange two 7c, the oil tank 8 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (10)

1. An oil level sensor comprises a mounting seat (1) and a pressure sensing probe (2), the mounting seat (1) is provided with an oil inlet channel (1a), the pressure sensing probe (2) is arranged at the oil inlet channel (1a), it is characterized in that the mounting seat (1) is provided with a connecting piece (5) used for fixing the mounting seat (1) on the outer side wall of the oil tank (8), the sensor also comprises a filter piece (6) which is arranged on the mounting seat (1) and can extend into the oil tank (8), the filtering piece (6) comprises a tubular oil passing part (6a) and an oil filtering part (6b) which is arranged at the port of the oil passing part (6a) and can filter impurities, the oil inlet channel (1a) is communicated with the oil passing part (6a), and the oil passing part (6a) can move relative to the mounting seat (1) to adjust the length of the oil tank (8) and can be mutually positioned after adjustment.

2. The fuel level sensor according to claim 1, wherein the mounting base (1) is provided with a connecting column (1b) which protrudes upwards, the fuel inlet channel (1a) extends to the connecting column (1b) and penetrates through the top end of the connecting column (1b), the connecting column (1b) is sleeved with the oil passing part (6a), the inner wall of the oil passing part (6a) is attached to the outer wall of the connecting column (1b), and the oil passing part (6a) can slide relative to the connecting column (1b) and can be positioned.

3. The oil level sensor according to claim 2, wherein the mounting base (1) is further provided with a positioning column (1c) protruding upwards, the side wall of the oil passing portion (6a) is provided with a protruding positioning portion (6c), the positioning portion (6c) is sleeved on the positioning column (1c), and the positioning portion (6c) is tightly matched with the positioning column (1 c).

4. The fuel level sensor according to claim 3, wherein the positioning portion (6c) is plate-shaped, a positioning hole (6c1) is formed in the positioning portion (6c), a plurality of protruding latches (6c11) are formed on the inner peripheral wall of the positioning hole (6c1), the positioning column (1c) is inserted into the positioning hole (6c1), and the plurality of latches (6c11) abut against the outer peripheral wall of the positioning column (1c) to realize tight fit.

5. The fuel level sensor according to claim 4, wherein said latch (6c11) is V-shaped in cross section along the radial direction of the positioning hole (6c 1).

6. The fuel level sensor according to claim 5, characterized in that the V-shaped bend of the latch (6c11) is rounded off.

7. The fuel level sensor according to any one of claims 3, 4, 5 and 6, wherein a sealing block (7) is further arranged on one side surface of the mounting seat (1) with the connecting column (1b), and the sealing block (7) is made of flexible material and is in abutting sealing with the side surface of the mounting seat (1).

8. The fuel level sensor according to claim 7, wherein the sealing block (7) is further provided with a communication hole (7a) opposite to the mounting opening on the fuel tank, an annular convex edge (7b) is protruded at the edge of the communication hole (7a) along the circumferential direction, and the connecting column (1b) and the positioning column (1c) both pass through the communication hole (7 a).

9. The fuel level sensor according to claim 8, wherein the oil filter portion (6b) is disc-shaped, and in axial projection of the oil filter portion (6a), the oil filter portion (6b) coincides with the communication hole (7a) or can cover the communication hole (7 a).

10. The fuel level sensor according to claim 8, wherein said connecting member (5) is a connecting bolt passing through said sealing block (7), said sealing block (7) further having an annular flange (7c) disposed around said connecting bolt.

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