CN216815512U - Sensor - Google Patents

Abstract

The application discloses a sensor, which comprises a coil component, a shell component, a sealing component and an induction component, wherein the shell component comprises a shell, the sealing component comprises a positioning piece, the coil component is sleeved outside the positioning piece, the positioning piece is arranged in the shell, the induction component comprises an iron core sleeve, an iron core and an induction head, the coil component comprises a first axial hole, the iron core sleeve is at least partially positioned in the first axial hole, the iron core is in transmission connection with the induction head, the iron core can axially slide relative to the coil component in the iron core sleeve, the positioning piece comprises a first inner accommodating groove, the sealing component further comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged in the first inner accommodating groove, the first sealing piece is abutted against the groove wall of the first inner accommodating groove, the first sealing piece is abutted against the outer wall of the coil component, the outer wall of the positioning piece is provided with a first outer accommodating groove, the second sealing piece is arranged in the first outer accommodating groove, the second sealing element is abutted with the outer wall of the first outer containing groove, and the second sealing element is abutted with the inner wall of the shell, so that the sealing structure is simple.

Description

Sensor

Technical Field

The utility model relates to the technical field of sensing, in particular to a sensor.

Background

The sensor has wide application field, for example, the sensor can be applied to a compressor system, the position of a slide valve of the compressor system is detected, the slide valve adjusts the air quantity of the compressor, the load of the compressor is adapted to the cold quantity required by a user, energy conservation is realized, the signal is fed back to a controller, and the controller judges the load of the compressor according to the signal, so that the corresponding loading and unloading operation is realized. In some systems, such as an air conditioning system, since the working environment near the compressor is generally harsh, and there is a high humidity, splashing of condensed water, and the like, the waterproof performance of the signal processing module inside the sensor is particularly important, and as shown in fig. 10-12, a waterproof sensor disclosed in chinese patent CN208520350U includes an electrical box 10 ', a partition plate 13', a plurality of water baffles 101 ', a water-stop glue seat 107', and the partition plate 13 'divides the electrical box 10' into a first cavity 104 'and a second cavity 103', and is sealed by potting water-stop glue, and the structure of the waterproof sensor is complicated, and the water baffle 101 'has a through hole for inserting an inner tube 25' of a transformer 20 ', and there is an unavoidable gap between an outer wall of the inner tube 25' and the water baffle 101 ', and there is a risk that the electrical box is performed by a fluid once the sealing member 225' is loosened and failed.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a sensor, including coil component, still include casing part, seal part, response part, the casing part includes the casing, seal part includes the setting element, the setting element overcoat the coil component, the setting element is arranged in the casing, response part includes iron core cover, iron core and inductive head, coil component includes first axial hole, the iron core cover is located at least part of first axial hole, the iron core with the inductive head transmission is connected, the iron core can be in the iron core cover for coil component axial slip, the setting element includes first content and accomodates the groove, seal part still includes first sealing member and second sealing member, first sealing member is arranged in first content and is accomodate the groove, first sealing member with the first cell wall butt of accomodating the groove, first sealing member with the outer wall butt of coil part, the outer wall of setting element has the first outer groove of holding, the second sealing member set up in the first outer groove of holding, the second sealing member with the first outer wall butt of holding the groove outward, the second sealing member with the inner wall butt of casing, the relative background art seal structure of this application is simple.

Drawings

FIG. 1 is a perspective view of one embodiment of a sensor of the present application;

FIG. 2 is a schematic diagram of a partial explosion of the sensor of FIG. 1;

FIG. 3 is a schematic cross-sectional view of a portion of the structure of FIG. 1;

FIG. 4A is a perspective view of the housing of FIG. 3;

FIG. 4B shows a top view of the housing of FIG. 3;

FIG. 4C is a schematic cross-sectional view of the housing of FIG. 3 in one direction;

FIG. 5 is a schematic view of a portion of the structure of the inductive component;

FIG. 6 is a schematic partial cross-sectional view of an inductive component;

FIG. 7 is a schematic cross-sectional view of a positioning member;

FIG. 8 is a perspective view of a positioning member;

FIG. 9 is a perspective view of the joint;

FIG. 10 is a schematic cross-sectional view of a sensor of the background art;

FIG. 11 is an exploded view of the sensor of FIG. 10;

fig. 12 is a perspective view of the electrical box of fig. 10.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 9, in the present embodiment, the sensor includes a control member 10, a coil member 20, a seal member 30, and a sensing member including a joint member 40 and an induction transmission member 50.

The control part 10 includes a housing part 101, a data processing module 102, and a wire holder 103. The housing member 101 has a housing 1011 and a cover 1012, and in the present embodiment, the housing 1011 and the cover 1012 are fixedly connected by screws 1013.

The housing 1011 and the cover 1012 are respectively injection molded, which reduces the number of parts and simplifies the sensor structure compared to the background art, and in this embodiment, the housing 1011 and the cover 1012 are connected in a matching manner to form a first accommodating space a and a second accommodating space B. The housing 1011 includes a baffle 1011A and a shell 1011B, which are integrally formed by injection molding, that is, the baffle 1011A and the shell 1011B are integrally formed by injection molding, and the process is simple. Specifically, in this embodiment, the housing 1011 is formed by injection molding with an upper cavity B1 for mounting the data processing module 102 and a lower cavity B2 for cooperating with the coil component 20, etc., the blocking portion 1011A is a connecting wall shared by the upper cavity B1 and the lower cavity B2, the upper surface of the blocking portion 1011A is a part of the wall surface of the upper cavity B1, the lower surface of the blocking portion 1011A is a part of the wall surface of the lower cavity B2, and the interior of the lower cavity B2 is the second accommodating space B described above.

As shown in fig. 3 to 5, the housing section 1011B includes two opening portions when being a part, i.e., a first opening portion 2021 and a second opening portion 2022, the first opening portion 2021 being for the data processing module 102 to be mounted therein, which is specifically a circuit board in the present embodiment. As shown in the drawing, the upper chamber B1 and the lower chamber B2 communicate with each other through a communication hole C between the two chambers. In the present embodiment, the entire communicating hole C is formed on the stopper 1011A, that is, the hole wall of the communicating hole C is located on the stopper 1011A, but it is understood that the hole wall of the communicating hole C may be partially located on the housing 1011B. The communication hole C is used for filling the second accommodating space B with a filling material to form a filling body, and the coil component 20, the positioning member 311 and the housing 1011 are further fixedly connected together.

The coil component 20 includes a case 201, a lead 202, and a coil 203 built in the case 201, the coil 203 is electrically connected to the lead 202, the lead 202 is electrically connected to the circuit board 102 through the communication hole C, and the circuit board 102 is electrically connected to the wire holder 103. The sealing member 30 is fitted over the case 201 of the coil component 20, and the sealing member 30 and a part of the coil component 20 are inserted into the inner cavity of the lower cavity B2 from the second opening 2022 and mounted. The end of the housing 1011 includes an annular groove 2020, the annular groove 2020 is provided with an annular sealing ring 2030, the cover 1012 and the housing 1011 are connected by a plurality of screws after being matched, and the sealing ring 2030 prevents external fluid from entering the housing 101 from the connection between the cover 1012 and the housing 1011 to damage the data processing module 102.

Compared with the waterproof sensor disclosed in the background art CN208520350U, the sensor has the advantages that the lower cavity B2 is integrally formed on the housing 1011 through injection molding, a separate partition plate, a water-stop rubber seat and the like are omitted, the number of parts can be reduced, the housing 1011 is convenient to process, and the coil part is convenient to connect and assemble with a circuit board.

As shown in fig. 2, 3 and 7, the housing 1011 has a stepped hole therein, the stepped surface of the stepped hole serves as a stopper 1010, the sealing member 30 includes a positioning member 311 and a first sealing member 312, the inner wall of the positioning member 311 has a first inner accommodating groove 310 having an annular shape, the first sealing member 312 is mounted in the first inner accommodating groove 310, the first sealing member 312 is tightly fitted to the outer wall of the housing 201 of the coil member 20, the first sealing member 312 abuts against the groove wall of the first inner accommodating groove 310, so that the positioning member 311 forms a predetermined position with the coil member 20, and the sealing member 30 and the coil member 20 do not slide relative to each other without an external force. The sealing member 30 and the coil member 20 are fixed to each other to form a single unit X, and then inserted into the housing 1011.

As shown in fig. 3 and 7, the housing 201 is cylindrical, the cylindrical positioning member 311 is fitted over the housing 201, and when the positioning member 31 and the coil member 20 are fitted tightly via the first sealing member 312, the positioning member 31 and a part of the coil member 20 are inserted into the housing 1011 until the positioning member 31 abuts against the stopper 1010, and the stopper 1010 stops the axial insertion of the component X. It is understood that the first sealing member 312 serves to connect the coil member 20 and the spacer 311 together, and also serves to limit the filling range of the potting material, so that the potting material is prevented from flowing out of the housing 1011 from between the inner wall of the spacer 311 and the outer wall of the coil 20, and the first sealing member 312 can prevent the sensor external fluid from entering the housing member 101 and damaging the circuit board 102. It should be noted that, in the embodiment shown in fig. 3, for convenience of understanding the technical solution, the potting body is not shown, so as to clearly see the internal structure of the housing.

Further, as shown in fig. 3 and 7, the outer wall of the positioning member 311 further has a first outer receiving groove 320, and a second sealing member 322 is mounted in the first outer receiving groove 320. The second sealing member 322 is tightly fitted with the inner wall of the housing 1011 and the outer wall of the first outer receiving groove 320. In addition to the sealing function, the second sealing member 322 also functions to limit the filling range of the potting material, so as to prevent the potting material from flowing out of the housing 1011 from between the outer wall of the positioning member 311 and the inner wall of the housing 1011, and in addition, the second sealing member 322 can prevent the fluid from entering the housing member 1011 to damage the circuit board 102.

As shown in fig. 3 and 5, the outer wall of the joint 41 has a second outer receiving groove 42, the third seal 43 is attached to the second outer receiving groove 42, and the third seal 43 is tightly fitted to the inner wall of the housing 1011 and the outer wall of the second outer receiving groove 42, thereby positioning and connecting the joint member 40 and the housing member 101 and also achieving a sealing function.

The joint member 40 includes a joint 41 and a core sleeve 44, and the joint 41 is fixedly connected with the core sleeve 44, specifically, directly or indirectly welded and fixed thereto. The coil component comprises a first axial hole 2001, the core sleeve 44 is at least partially located in the first axial hole 2001, and the induction transmission component 50 comprises a core 51, a link 52 fixedly connected with the core 51 and capable of driving the core 51 to move, and an induction head 53 in transmission connection with the link 52. The iron core 51 is located in the second axial through hole 2002 of the iron core sleeve 44, one end of the iron core 51 is in threaded connection with one end of the connecting rod 52 extending into the iron core sleeve 44, and the other end of the connecting rod 51 is fixedly connected with the induction head 53, i.e. the induction transmission component and the joint component 40 can be regarded as an integral unit in a free state (i.e. when the induction transmission component is not operated), and when the induction transmission component is operated, the induction transmission component 50 can axially slide in the iron core sleeve 44 relative to the coil component 20, so that an induction potential is generated.

After the connector member 40 and the induction transmission member 50 are assembled into a single body, the insertion portion 411 is inserted into the housing 1011 and the insertion portion 411 abuts against the positioning member 311, that is, the positioning member is fixed in the housing 1011 by the housing 1011 and the connector 41. Specifically, the joint 41 includes an insertion portion 411 and an operation portion 412, the insertion portion 411 has a cylindrical shape, and the insertion portion 411 is inserted into the housing 1011 and abuts against the positioning member 311. The operation portion 412 is located outside the housing 1011. The insertion portion 411 of the contact 41 is inserted into the inner cavity of the lower cavity B2 from the opening of the second opening 2022. One end of the operation portion 412 near the insertion portion 411 is opposed to an end surface of the second opening 2022. The outer wall of the insertion portion 411 of the joint 41 has a recess (in this embodiment, specifically, a groove) 4111, the housing member 101 further includes a stop (in this embodiment, specifically, a screw 104) having one end protruding into the recess 4111 to fixedly connect the joint member 40 with the housing 1011 to limit the joint 41 from being separated from the housing 1011, in this embodiment, the stop is specifically two screws, the two screws are symmetrically arranged in the radial direction of the joint 41, and the recess 4111 is specifically a circle of annular groove in this embodiment, it is understood that the shape of the recess 4111 is not specifically limited as long as the stop can cooperate with the stop to limit the displacement of the joint 41 in the axial direction relative to the housing 1011.

As can be seen from the above, the positioning member 311 of the sealing member 30 is inserted into the housing 1011 to abut against the position-limiting portion 1010, and the insertion portion 411 of the joint 41 abuts against the positioning member 311, and in the embodiment shown in fig. 3, the sealing member 30 is clamped between the position-limiting portion 1010 of the housing 1011 and the joint 41, so that the sealing member 30 is positioned in the housing 1011.

In this embodiment, the housing 201 of the coil component 20 is cylindrical, and the inner wall of the lower cavity B2 is cylindrical, so that after the coil component 20 and the sealing component 30 are assembled with the lower cavity B2, it is convenient to provide a sealing structure, for example, one of the first sealing element 312, the second sealing element 322 and the third sealing element 43 is provided to prevent external fluid from entering the interior of the sensor, for this reason, when the housing 1011 is integrally formed by injection molding, the lower cavity B2 with a cylindrical inner wall can be conveniently formed, so that the housing of the sensor is convenient to process, the material cost is low, and accordingly, the sealing structure is simple, and the assembly of the whole sensor product is facilitated.

In this embodiment, each holding tank and each sealing member all are the ring shape, and processing is convenient. In addition, the number of the accommodating grooves and the corresponding sealing members is not limited, for example, more than 2 accommodating grooves and sealing members may be respectively disposed on the inner wall and the outer wall of the positioning member 311.

In the sensor of the present embodiment, the positioning element 311 and the coil element 20 are conveniently assembled, and further, the first sealing element 312 is tightly fitted with the positioning element 311 and the coil element 20 to pre-fix the positioning element 311 and the coil element 20, so as to facilitate the assembly of the sensor.

In the sensor of the present embodiment, before the first sealing member 312 is installed in the positioning member 311, that is, before the first sealing member 312 is engaged with the positioning member 311, the positioning member 311 is sleeved on the housing 201 of the coil member 20 and then can be easily slid in the axial direction relative to the coil 20. After the first sealing member 312 is installed, the positioning member 311 is connected to the housing 201 in a positioning manner, and does not slide relatively. Thus, the zero position of the sensor can be conveniently calibrated.

The sensor still includes shield cover subassembly 500, shield cover subassembly 500 is located first accommodation space A, shield cover subassembly 500 includes the first cover body 501 and the second cover body 502, the first cover body 501 and the second cover body 502 can choose stainless steel material for use and make, the first cover body 501 is connected with the lock of the second cover body 502, data processing module 102 is arranged in shield cover subassembly 500, electronic component on this shield cover subassembly 500 can shield the circuit board realizes shielding external interference's effect, promote electronic component interference killing feature, furthermore, the shield cover subassembly can also promote data processing module 102's dampproofing and waterproofing ability. The second cover 502 has a through hole 503, and the lead 202 is electrically connected to the data processing module 102 through the through hole 503 from the communication hole C.

The first cover 501 is provided with screw holes to which screws 1013 are connected, and the screws fixedly connect the cover 1012, the first cover 501, and the housing 1011 to position the data processing module 102 in the first accommodation space a.

The assembly method of the sensor comprises the following steps: positioning the induction component on a tool table; then the sensor is zero calibrated by the following method: sleeving the positioning piece 311 on the coil component 20, inserting one end of the coil component 20 far away from the lead 202 into the inner cavity of the joint 41, electrifying the coil component 20, slowly moving the coil component 20 to perform axial displacement relative to the iron core 51 of the induction component after electrifying, testing the output voltage, detecting a zero point position (the zero point position is a position where the middle point of the coil 203 and the middle point of the iron core 41 are overlapped in the axial direction of the coil component 20), and in the calibration process, after the output voltage meets a required value, enabling the positioning piece 311 to be in contact with the end face of the insertion part 411 of the joint 41 to complete the axial positioning of the iron core sleeve 42. After the positioning, the installation position of the positioning element 311 can be determined, and then the positioning element 311 is removed after the installation position of the positioning element 311 is marked (e.g., a line is drawn and a point is marked) on the housing 201. After the positioning member 311 is removed, the first sealing member 312 is fitted to the positioning member 311, and the positioning member 311 with the first sealing member 312 fitted thereto is fitted to the housing 201 until an end of the positioning member 311 adjacent to the tab 41 (the end is the left end of the positioning member 311 in the finished sensor shown in fig. 2) is flush with the mark (e.g., M position shown in fig. 3) on the coil 20. When the sensor is assembled, the insertion portion 411 of the joint 41 of the joint member 40 is abutted against one end of the positioning member 311 away from the mark M, that is, the zero position calibration of the sensor is completed.

The sensor assembling method further includes potting the inner space of the sensor, and as shown in fig. 1 and 2, the cover 1012 is provided with an injection hole 1014. After the components are assembled, the first accommodating space a and the second accommodating space B of the sensor are filled with the potting material from the injection hole 1014 to increase the waterproof performance of the sensor.

The sensor of the above scheme is convenient to process, and through the matching of the positioning piece 311 and the first sealing piece 312 with the coil component 20, the sensor is convenient to calibrate in a zero position, and the processing cost is low. The position of iron core cover 44 is fixed a position through the position of setting element 311 promptly, and the scope that can supply the adjustment is big, and adjusts the precision height, need not carry out the secondary regulation again through resistance changing or increase and decrease gasket, can directly adjust in place after confirming the zero bit, and it is convenient to adjust, need not dismantle the debugging repeatedly. When in maintenance, the zero position can be determined again by directly adjusting the position of the positioning part 311, and the maintenance is also convenient.

The foregoing is merely an illustration of specific embodiments of this invention and it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and are intended to be within the scope of the utility model.

Claims (5)

1. A sensor comprises a coil component and is characterized by further comprising a shell component, a sealing component and an induction component, wherein the shell component comprises a shell, the sealing component comprises a positioning piece, the positioning piece is sleeved outside the coil component and is arranged in the shell, the induction component comprises an iron core sleeve, an iron core and an induction head, the coil component comprises a first axial hole, the iron core sleeve is at least partially positioned in the first axial hole, the iron core is in transmission connection with the induction head, the iron core can axially slide relative to the coil component in the iron core sleeve, the positioning piece comprises a first inner accommodating groove, the sealing component further comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged in the first inner accommodating groove, the first sealing piece is abutted to the wall of the first inner accommodating groove, the first sealing member abuts against an outer wall of the coil member, the outer wall of the positioning member has a first outer containing groove, the second sealing member is provided in the first outer containing groove, the second sealing member abuts against an outer wall of the first outer containing groove, and the second sealing member abuts against an inner wall of the housing.

2. The sensor according to claim 1, wherein the housing comprises a lower cavity, the coil component is partially located in the lower cavity, an inner wall of the lower cavity comprises a limiting portion, the sensing component comprises a joint component, the joint component comprises a joint and the core sleeve, the joint is fixedly connected or in limiting connection with the core sleeve, the positioning member abuts against the limiting portion, and the joint abuts against the positioning member.

3. The sensor of claim 2, further comprising a third seal, the outer wall of the fitting including a second outer receiving groove, the third seal being disposed at the second outer receiving groove, the third seal abutting the outer wall of the second outer receiving groove, the third seal abutting the inner wall of the housing, the outer wall of the fitting further including a recess, the housing component further including a stop that cooperates with the recess to limit the fitting from disengaging the housing.

4. The sensor of claim 3, wherein the sensing element comprises a connecting rod, the core sleeve has a second axial hole, the core is located in the second axial hole, the connecting rod is fixedly connected with the core, and the connecting rod is in transmission connection with the sensing head.

5. The sensor of claim 3, wherein the housing component further comprises a cover, the shell and the cover body are matched to form a first accommodating space, the sensor also comprises a data processing module and a shielding cover component, the shielding cover assembly is positioned in the first accommodating space and comprises a first cover body and a second cover body, the first cover body and the second cover body are made of metal materials, the first cover body is buckled and connected with the second cover body, the data processing module is arranged in the shielding case assembly, the second cover body is provided with a through hole, the case includes a communication hole, the coil component includes a lead wire passing through the communication hole, the lead is electrically connected with the data processing module, the cover body is provided with an injection hole, and potting material flows into the first accommodating space from the injection hole.

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