CN216954659U

CN216954659U - Improved hot-wire type air flow sensor

Info

Publication number: CN216954659U
Application number: CN202220560177.7U
Authority: CN
Inventors: 叶锋
Original assignee: Ruian Hehua Automotive Electronics Co ltd
Current assignee: Ruian Hehua Automotive Electronics Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-07-12
Anticipated expiration: 2032-03-15

Abstract

The utility model discloses an improved hot-wire air flow sensor, belonging to the technical field of automobile sensors, wherein a controller is fixedly arranged on the surface of an air flow sensor body, a connecting groove is formed in one side of the air flow sensor body, an active carbon filter screen and a metal screen plate are fixedly arranged on the inner wall of the connecting groove, the metal filter screen is fixedly connected to the inner wall of the metal screen plate, a shaft rod is rotatably connected to the central position of the metal filter screen through a sealing bearing, one end of the shaft rod is fixedly connected with a fan-shaped cleaning brush, the outer side metal screen plate arranged on the improved hot-wire air flow sensor is clamped with the air flow sensor body through a clamping block, the assembly efficiency is greatly improved, the arranged fan-shaped cleaning brush has an automatic rotation function when air flows, the surface of the metal filter screen is automatically cleaned, and the blockage of meshes is avoided, the stability of the air inlet flow is ensured.

Description

Improved hot-wire type air flow sensor

Technical Field

The utility model relates to the technical field of automobile sensors, in particular to an improved hot-wire type air flow sensor.

Background

An air flow sensor, also called an air flow meter, is one of the important sensors of an electronic fuel injection engine, which converts the intake air flow into an electrical signal to be sent to an electronic control unit, and is one of the basic signals determining the injection of fuel, and is the sensor measuring the intake air flow into the engine.

At present, the air flow sensor in the market is of various types, wherein the function type is also different, like a novel automobile hot wire type air flow sensor disclosed in publication No. CN211740317U, but this sensor outside metal mesh plate passes through screw fastening, is comparatively consuming time when installing and removing, has reduced packaging efficiency to in the use, dust impurity in the air can cause the mesh jam of metal mesh plate, thereby influences the stability of air inlet flow.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide an improved hot-wire air flow sensor, an outer metal mesh plate arranged on the improved hot-wire air flow sensor is clamped with an air flow sensor body through a clamping block, so that the assembly efficiency is greatly improved, and a fan-blade-shaped cleaning brush has an automatic rotation function when air flows, so that the surface of a metal filter screen is automatically cleaned, the mesh blockage is avoided, and the stability of the air inflow is ensured.

In order to solve the above problems, the present invention adopts the following technical solutions.

An improved hot-wire air flow sensor comprises an air flow sensor body, wherein a controller is fixedly mounted on the surface of the air flow sensor body, a connecting groove is formed in one side of the air flow sensor body, an activated carbon filter screen and a metal screen plate are fixedly mounted on the inner wall of the connecting groove, a metal filter screen is fixedly connected to the inner wall of the metal screen plate, a shaft rod is rotatably connected to the central position of the metal filter screen through a sealing bearing, a fan-blade-shaped cleaning brush is fixedly connected to one end of the shaft rod, a supporting rod is rotatably connected to the other end of the shaft rod through a bearing, a containing hole is formed in one end of the supporting rod, an extrusion rod is slidably connected to the inner wall of the containing hole, a spring is connected to one end of the extrusion rod in a contact manner, a clamping block is fixedly connected to the other end of the extrusion rod, and the outer metal screen plate arranged on the improved hot-wire air flow sensor body is clamped with the air flow sensor body through the clamping block, great improvement the packaging efficiency to the flabellum form cleaning brush that sets up has autogiration's function when the air flows, and then automatic clearance metal filters's surface, avoids the mesh to block up, has guaranteed the stability of air intake flow.

Further, the shape of fixture block is the arc, the surface contact of fixture block is connected with the draw-in groove, the draw-in groove is annular equidistance and distributes at the inner wall of spread groove, the groove of accomodating has been seted up on metal mesh plate's surface, and the groove of accomodating that sets up has the effect of keeping away the sky, makes things convenient for the fixture block to accomodate, and the arc fixture block is convenient for automatic the card simultaneously and advances the mounted position of draw-in groove internal fixation metal mesh plate.

Furthermore, there is a limiting rod in the side of the extrusion rod through threaded connection, the sliding surface of the limiting rod is connected with a limiting groove, one side of the limiting groove is communicated with the accommodating hole, the telescopic position of the extrusion rod can be limited by the limiting rod and the limiting groove, and the anti-falling limiting function is achieved.

Furthermore, one end of the supporting rod is fixedly sleeved with the inner wall of the metal mesh plate, the metal mesh plate is annular, the supporting rod can prevent the metal mesh plate from deforming, and the supporting strength of the metal mesh plate is improved.

Furthermore, the brush hair of clearance brush is connected with the outside surface contact of metal filters, and the brush hair that the clearance brush set up has the function of automatic clearance metal filters surface dust impurity when the clearance brush is rotatory.

Compared with the prior art, the utility model has the advantages that:

(1) the outside metal mesh plate that this scheme set up passes through fixture block and air flow sensor body joint, great improvement packaging efficiency to the flabellum form cleaning brush that sets up has autogiration's function when the air flows, and then automatic clearance metal filters's surface, avoids the mesh to block up, has guaranteed the stability of inlet air flow.

(2) The shape of fixture block is the arc, and the surface contact of fixture block is connected with the draw-in groove, and the draw-in groove is annular equidistance and distributes at the inner wall of spread groove, and the groove of accomodating has been seted up on the surface of metal mesh board, and the groove of accomodating that sets up has the clearance effect, makes things convenient for the fixture block to accomodate, and the arc fixture block is convenient for automatic the card simultaneously and advances the mounted position of fixed metal mesh board in the draw-in groove.

(3) The side of the extrusion stem has a limiting rod through threaded connection, the sliding surface of the limiting rod is connected with a limiting groove, one side of the limiting groove is communicated with the accommodating hole, the telescopic position of the extrusion stem can be limited by the limiting rod and the limiting groove, and the anti-falling limiting function is achieved.

(4) One end of the supporting rod is fixedly sleeved with the inner wall of the metal mesh plate, the metal mesh plate is annular, the supporting rod can avoid deformation of the metal mesh plate, and the supporting strength of the metal mesh plate is improved.

(5) The brush hair of clearance brush is connected with metal filters's outside surface contact, and the brush hair that the clearance brush set up has the function of automatic clearance metal filters surface dust impurity when the clearance brush is rotatory.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of a sheet metal structure of the present invention;

fig. 3 is an enlarged view of a portion a of fig. 2.

The reference numbers in the figures illustrate:

the air flow sensor comprises an air flow sensor body 1, a controller 11, a connecting groove 12, a clamping groove 13, an active carbon filter screen 14, a metal screen plate 2, a metal filter screen 21, a containing groove 22, a cleaning brush 3, a shaft rod 31, a bearing 32, a support rod 4, a containing hole 41, a spring 42, an extrusion rod 43, a clamping block 44, a limiting rod 45 and a limiting groove 46.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an improved hot-wire type air flow sensor comprises an air flow sensor body 1, referring to fig. 1-3, a controller 11 is fixedly installed on the surface of the air flow sensor body 1, a display screen is installed on the surface of the controller 11, and a power connector is installed at one end of the controller 11, which belongs to the prior art, the composition structure and the working principle of the improved hot-wire type air flow sensor are well known to those skilled in the art, a connecting groove 12 is installed on one side of the air flow sensor body 1, an active carbon filter screen 14 and a metal mesh plate 2 are fixedly installed on the inner wall of the connecting groove 12, the active carbon filter screen 14 has the function of filtering small dust in air, which belongs to the prior art, a metal filter screen 21 is fixedly connected to the inner wall of the metal mesh plate 2, the metal filter screen 21 has the function of filtering large dust impurities in air, the center position of the metal filter screen 21 is rotatably connected with a shaft rod 31 through a sealing bearing, one end fixedly connected with flabellate clearance brush 3 of axostylus axostyle 31, clearance brush 3 is when the air passes through, the function that has free rotation under the air current drives, the other end of axostylus axostyle 31 rotates through bearing 32 and is connected with bracing piece 4, the hole 41 has been seted up to the one end of bracing piece 4, the inner wall sliding connection who accomodates hole 41 has an extrusion stem 43, the one end contact of extrusion stem 43 is connected with spring 42, spring 42 is in the state of compression elasticity, make fixture block 44 have the function of automatic chucking through elasticity, the installation fastness of metal mesh board 2 has been improved, the other end fixedly connected with fixture block 44 of extrusion stem 43.

Please refer to fig. 2 and 3, the shape of the fixture block 44 is arc, the surface contact of the fixture block 44 is connected with the fixture groove 13, the fixture groove 13 is the inner wall of the connecting groove 12 in annular equidistance distribution, the accommodating groove 22 has been seted up on the surface of the metal mesh plate 2, the accommodating groove 22 that sets up has the clearance effect, make things convenient for the fixture block 44 to accomodate, the arc fixture block 44 is convenient for automatic card to enter the mounted position of the fixed metal mesh plate 2 in the fixture groove 13 simultaneously, there is the gag lever post 45 side of the squeeze bar 43 through threaded connection, the sliding surface of the gag lever post 45 is connected with the spacing groove 46, one side of the spacing groove 46 communicates with the accommodating hole 41 each other, the telescopic position of the squeeze bar 43 can be restricted by the gag lever post 45 and the spacing groove 46 that set up, has the function of anti-slip limiting.

Referring to fig. 1 and 2, one end of the supporting rod 4 is fixedly sleeved with the inner wall of the metal mesh plate 2, the metal mesh plate 2 is annular, the supporting rod 4 is arranged to prevent the metal mesh plate 2 from deforming, the supporting strength of the metal mesh plate 2 is improved, the bristles of the cleaning brush 3 are in contact connection with the outer side surface of the metal filter screen 21, and the bristles of the cleaning brush 3 have the function of automatically cleaning dust and impurities on the surface of the metal filter screen 21 when the cleaning brush 3 rotates.

When the improved hot-wire air flow sensor is provided with the metal mesh plate 2, the clamping block 44 is pressed and contracted in the accommodating groove 22, then the metal mesh plate 2 is sleeved in the connecting groove 12, when the clamping block 44 moves to the position of the clamping groove 13, the elastic force of the spring 42 pushes the clamping block 44 to be automatically clamped in the clamping groove 13, in the using process of the sensor, external air enters the inside of the air flow sensor body 1 through meshes of the metal filter screen 21, the air flow drives the cleaning brush 3 to rotate when the air passes through, the cleaning brush 3 rotates to enable the bristles to rotate to clean dust and impurities adhered to the surface of the metal filter screen 21, the arranged outer metal mesh plate 2 is clamped with the air flow sensor body 1 through the clamping block 44, the assembling efficiency of the air flow sensor is greatly improved, the arranged fan-blade-shaped cleaning brush 3 has an automatic rotating function when the air flows, and further the surface of the metal filter screen 21 is automatically cleaned, avoid the mesh to block up, guaranteed the stability of air intake flow.

The foregoing is only a preferred embodiment of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. An improved hot-wire air flow sensor comprising an air flow sensor body (1), characterized in that: the air flow sensor is characterized in that a controller (11) is fixedly mounted on the surface of an air flow sensor body (1), a connecting groove (12) is formed in one side of the air flow sensor body (1), an activated carbon filter screen (14) and a metal screen plate (2) are fixedly mounted on the inner wall of the connecting groove (12), the metal filter screen (21) is fixedly connected to the inner wall of the metal screen plate (2), a shaft lever (31) is rotatably connected to the central position of the metal filter screen (21) through a sealing bearing, a fan-shaped cleaning brush (3) is fixedly connected to one end of the shaft lever (31), a supporting rod (4) is rotatably connected to the other end of the shaft lever (31) through a bearing (32), a containing hole (41) is formed in one end of the supporting rod (4), an extrusion rod (43) is slidably connected to the inner wall of the containing hole (41), and a spring (42) is connected to one end of the extrusion rod (43) in a contact manner, the other end of the extrusion rod (43) is fixedly connected with a clamping block (44).

2. An improved hot-wire air flow sensor according to claim 1, wherein: the shape of fixture block (44) is the arc, the surface contact of fixture block (44) is connected with draw-in groove (13), draw-in groove (13) are annular equidistance and distribute at the inner wall of spread groove (12), accomodate groove (22) have been seted up on the surface of metal mesh board (2).

3. An improved hot-wire air flow sensor according to claim 1, wherein: the side of extrusion pole (43) has gag lever post (45) through threaded connection, the surperficial sliding connection of gag lever post (45) has spacing groove (46), one side and the hole of accomodating (41) intercommunication each other of spacing groove (46).

4. An improved hot-wire air flow sensor according to claim 1, wherein: one end of the supporting rod (4) is fixedly sleeved with the inner wall of the metal mesh plate (2), and the metal mesh plate (2) is annular.

5. An improved hot-wire air flow sensor according to claim 1, wherein: the brush hair of the cleaning brush (3) is in contact connection with the outer side surface of the metal filter screen (21).