Air flow meter for automobile engine

Abstract

The invention relates to the field of air flow meters, in particular to an air flow meter for an automobile engine, and solves the problem that in the prior art, a filter screen and a flow meter shell need to be cleaned separately and cannot be cleaned at the same time, so that the overall cleaning efficiency of the flow meter is low. A fixing cylinder is fixedly mounted on the left side of the shell, a connecting cylinder is arranged on the side, away from the shell, of the fixing cylinder, a filter cylinder is clamped between the connecting cylinder and the fixing cylinder, a filter screen is detachably mounted in the filter cylinder, and a first box is fixedly connected to the upper surface of the fixing cylinder. And the outer surface of the first box body is fixedly connected with a second box body. When the flow meter is cleaned, the filter screen can be automatically moved to the cleaning brush, meanwhile, the air suction barrel is automatically moved to one side of the shell, and then the shell and the filter screen can be cleaned at the same time, so that the overall cleaning efficiency of the flow meter can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of air flow meters, and in particular to an air flow meter used for an automobile engine. Background Art

[0002] The air flow sensor is one of the important sensors of the electronic fuel injection engine. It converts the inhaled air flow into an electrical signal and sends it to the electronic control unit (ECU) as one of the basic signals for determining fuel injection. It is a sensor that measures the air flow rate inhaled into the engine. In order to obtain the best concentration of mixed gas under various operating conditions, the electronically controlled gasoline injection engine must correctly measure the amount of air inhaled into the engine at each moment, which serves as the main basis for the ECU to calculate (control) the amount of fuel injection.

[0003] Currently, hot film air flow meters are commonly used. A filter is provided at the inlet of the hot film air flow meter, which can filter dust in the air. However, during long-term use, dust is easily accumulated on the filter, and a small amount of dust will also penetrate into the interior of the flow meter housing, so that the filter and the flow meter housing need to be cleaned regularly. However, the existing technology requires cleaning the filter and the flow meter housing separately, and the two cannot be cleaned at the same time, which will result in low overall cleaning efficiency of the flow meter.

[0004] Therefore, the present invention provides an air flow meter for an automobile engine to solve the above problems. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an air flow meter for an automobile engine to solve the problem that the prior art needs to clean the filter and the flow meter housing separately, and the two cannot be cleaned at the same time, resulting in low overall cleaning efficiency of the flow meter.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: The filter element is connected with the filter element through the air filter, and the filter element is connected with the filter element by the air filter, and the filter element is connected with the filter element by the air filter element.

[0007] Preferably, a mounting hole is opened on the circumferential surface of the shell, a mounting tube is fixedly connected in the mounting hole, a plug core is detachably connected to the mounting tube, and a mounting ring is fixedly sleeved on the outer surface of the shell.

[0008] Preferably, the synchronization mechanism includes a dual-axis motor installed on the upper surface of the first housing, two output ends of the dual-axis motor are fixedly connected to a driving shaft, the ends of the two driving shafts that are away from each other are rotatably installed inside the second housing, the outer surfaces of the two driving shafts are fixedly connected to a first synchronous wheel, the outer surface of the first driven shaft is installed with a first one-way bearing, the first one-way bearing is installed with a second synchronous wheel, the second synchronous wheel is connected to one of the first synchronous wheels via a first synchronous belt transmission, the outer surface of the second driven shaft is installed with a second one-way bearing, the second one-way bearing is installed with a third synchronous wheel, the third synchronous wheel is connected to the other first synchronous wheel via a second synchronous belt transmission.

[0009] Preferably, a third driven shaft is rotatably installed inside the second housing, a third one-way bearing is installed on the outer surface of the third driven shaft, a fifth synchronous wheel is installed on the third one-way bearing, a fourth synchronous wheel is fixedly connected to the outer surface of one of the driving shafts, and the fourth synchronous wheel and the fifth synchronous wheel are connected via a third synchronous belt transmission.

[0010] Preferably, a first reciprocating screw is rotatably installed inside the first box body, and the first reciprocating screw and the third driven shaft are transmission connected by a first bevel gear set, the outer surface of the first reciprocating screw is threadedly connected to the first threaded block, the outer surface of the first threaded block is fixedly connected to the first rectangular plate, and the first rectangular plate is slidably connected to the inside of the first box body, the bottom surface of the first rectangular plate is fixedly connected to two first slides, the top of the fixed cylinder is fixedly connected to the first fixed plate, the outer surface of the first fixed plate is fixedly connected to the support plate, the two first slides away from the first rectangular plate one side of the first slides both slide through the first fixed plate and are fixedly connected to the second rectangular plate, the bottom surfaces of the two second rectangular plates are fixedly connected to the second slides, the bottom surface of the fixed cylinder is fixedly connected to the second fixed plate, and the two second slides away from the second rectangular plate both slide through the second fixed plate and are fixedly connected to the pull plate.

[0011] Preferably, the outer surface of the connecting cylinder is fixedly connected to two first wedge plates, the outer surfaces of the two first wedge plates are fixedly connected to a first slider, the outer surface of the fixed cylinder is fixedly connected to two box bodies, the two first sliders are respectively slidably connected to the inside of the two box bodies, and a first elastic member is provided between the first slider and the box body, the two ends of the first elastic member are respectively fixedly connected to the first slider and the box body, and the outer surface of the second rectangular plate is fixedly connected to a second wedge plate adapted to the first wedge plate.

[0012] Preferably, a second reciprocating screw is rotatably installed inside the first box body, the second reciprocating screw and the third driven shaft are transmission connected by a second bevel gear set, the outer surface of the second reciprocating screw is threadedly connected to a second threaded block, and the second threaded block is slidably connected to the inside of the first box body, the outer surface of the second threaded block is fixedly connected to a suction cylinder, and the suction cylinder is fixedly connected to a baffle via a connecting rod, and an annular suction groove is formed between the baffle and the suction cylinder.

[0013] Preferably, a plurality of air suction holes corresponding to the fan blades are provided on one side of the first box body close to the fan blades, an air guide hose is fixedly connected to one side of the first box body close to the fan blades, the other end of the air guide hose is fixedly connected to an air suction pipe, and the other end of the air suction pipe is fixedly inserted into the interior of the air suction cylinder.

[0014] Preferably, a side wall of the first box body close to the air suction cylinder is fixedly connected to a guide rail, a second slider is slidably connected to the guide rail, a side of the second slider close to the air suction cylinder is fixedly connected to an elastic telescopic rod, the telescopic end of the elastic telescopic rod is fixedly connected to a support block, and the support block is fixedly connected to the top of the air suction cylinder.

[0015] Preferably, a first wedge-shaped block is fixedly connected to the top of the suction cylinder, and a second wedge-shaped block adapted to the first wedge-shaped block is fixedly connected to a position of the first box side wall near the bottom.

[0016] The beneficial effects of the present invention are: 1. The present invention can automatically move the filter to the cleaning brush and automatically move the suction cylinder to one side of the shell when cleaning the flow meter through the cooperation between the fixed cylinder, the connecting cylinder, the first box body, the second box body, the first driven shaft, the fan blades, the second driven shaft, the cleaning brush and the synchronization mechanism. After that, the shell and the filter can be cleaned at the same time, thereby greatly improving the overall cleaning efficiency of the flow meter.

[0017] 2. The present invention cooperates with the support block, the elastic telescopic rod, the second slider, the guide rail, the first wedge block and the second wedge block, so that when the suction cylinder is moved toward the shell, the suction cylinder can be pressed against one side of the fixed cylinder, so that the annular suction groove can face the inner wall of the shell, thereby ensuring the cleaning effect of the shell.

[0018] 3. Through the cooperation among the first wedge plate, the first slider, the box body, the first rectangular plate, the first fixed plate, the second fixed plate, the first slide plate, the second rectangular plate, the second slide plate, the pull plate and the second wedge plate, when the filter cartridge is moved toward the cleaning brush, the connecting cylinder can first move away from the filter cartridge to release the clamping of the filter cartridge. After the filter cartridge is moved toward the shell to the initial position, the connecting cylinder can automatically clamp the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the hidden shell of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the suction tube and the cleaning brush of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the filter cartridge and filter screen of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the first wedge plate and the second wedge plate of the present invention.

[0025] Figure 7 It is a schematic structural diagram of the connecting tube, the first wedge plate and the first sliding block of the present invention.

[0026] Figure 8 It is a schematic structural diagram of the first wedge block and the second wedge block of the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the air suction tube and the baffle of the present invention.

[0028] Fig.10 It is a schematic diagram of the structure of the second driven shaft and the cleaning brush of the present invention.

[0029] Fig.11 It is a schematic diagram of the present invention when cleaning the shell.

[0030] Fig.12 It is a schematic diagram of the first sliding block and the box body when the filter cartridge of the present invention is in the initial position.

[0031] Fig.13 It is a schematic diagram of the connection between the second box and the cylinder of the present invention.

[0032] Fig.14 It is a schematic diagram of the connection between the second threaded block and the air suction cylinder of the present invention.

[0033] In the figure: 1, housing; 2, mounting cylinder; 3, insert; 4, fixing cylinder; 5, connecting cylinder; 6, filter cylinder; 7, filter screen; 8, first wedge plate; 9, first slider; 10, box body; 11, first box body; 12, second box body; 13, first reciprocating screw rod; 14, second reciprocating screw rod; 15, first threaded block; 16, first rectangular plate; 17, first fixing plate; 18, second fixing plate; 19, first slide plate; 20, second rectangular plate; 21, second slide plate; 22, pull plate; 23, second wedge plate; 24, second threaded block; 25, air suction cylinder; 26, baffle; 27. Air suction pipe; 28. Support block; 29. ​​Elastic telescopic rod; 30. Second sliding block; 31. First wedge block; 32. Second wedge block; 33. Dual-axis motor; 34. Driving shaft; 35. First synchronous wheel; 36. First driven shaft; 37. First one-way bearing; 38. Second synchronous wheel; 39. Fan blade; 40. Partition net; 41. Second driven shaft; 42. Second one-way bearing; 43. Third synchronous wheel; 44. Cleaning brush; 45. Fourth synchronous wheel; 46. Third one-way bearing; 47. Fifth synchronous wheel; 48. Third driven shaft; 49. Cylinder; 50. Guide column. DETAILED DESCRIPTION

[0034] The following will describe various embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0035] An air flow meter for automobile engines, as shown in the attached Figure 1-3 As shown, it includes a cylindrical shell 1, a mounting hole is opened on the circumferential surface of the shell 1, a mounting cylinder 2 is fixedly connected in the mounting hole, a plug core 3 is detachably connected to the mounting cylinder 2, a mounting ring is fixedly sleeved on the outer surface of the shell 1, a fixing cylinder 4 is fixedly installed on the left side of the shell 1, a connecting cylinder 5 is arranged on the side of the fixing cylinder 4 away from the shell 1, a filter cylinder 6 is clamped between the connecting cylinder 5 and the fixing cylinder 4, a filter screen 7 is detachably installed inside the filter cylinder 6, the filter screen 7 is composed of a grid and a metal mesh, and the filter screen 7 can filter the gas entering the shell 1.

[0036] As attached Figure 1 and Figure 2As shown, the upper surface of the fixed cylinder 4 is fixedly connected to the first box body 11, the outer surface of the first box body 11 is fixedly connected to the second box body 12, a side surface of the first box body 11 is fixedly connected to a cylinder 49, a first driven shaft 36 is rotatably installed between the cylinder 49 and the second box body 12, the first driven shaft 36 is rotatably installed inside the second box body 12, the outer surface of the first driven shaft 36 is fixedly connected to the fan blade 39, the second driven shaft 41 is rotatably installed on the side of the first box body 11 away from the fan blade 39, a cleaning brush 44 is fixedly installed on the outer surface of the second driven shaft 41, an air inlet groove is provided on the side of the cylinder 49 away from the first box body 11, and the inside of the cylinder 49 A partition net 40 is fixedly connected, and the partition net 40 can block and collect the dust entering the interior of the cylinder 49. The cleaning brush 44 is composed of a circular plate and bristles installed on the circular plate, and the diameter of the circular plate is adapted to the diameter of the filter screen 7. After the filter cylinder 6 and the filter screen 7 are moved upward to the maximum extent, the filter screen 7 is concentric with and in contact with the cleaning brush 44. At this time, the cleaning brush 44 can be driven to rotate to clean the dust on the lower filter screen 7. At the same time, the fan blades 39 can be driven to rotate to suck the dust into the interior of the cylinder 49. In the process of the filter cylinder 6 moving upward, the bristles will be squeezed to deform. After the filter cylinder 6 moves upward to the maximum extent, the bristles will contact with the filter screen 7.

[0037] As attached Figure 2 , Figure 4 and Fig.10As shown, the synchronization mechanism includes a double-axis motor 33 installed on the upper surface of the first housing 11, two output ends of the double-axis motor 33 are fixedly connected to the driving shaft 34, and the ends of the two driving shafts 34 that are away from each other are rotatably installed in the second housing 12, the outer surfaces of the two driving shafts 34 are fixedly connected to the first synchronous wheels 35, the outer surface of the first driven shaft 36 is installed with a first one-way bearing 37, and the first one-way bearing 37 is installed with a second synchronous wheel 38, and the second synchronous wheel 38 is connected to one of the first synchronous wheels 35 through a first synchronous belt transmission, the outer surface of the second driven shaft 41 is installed with a second one-way bearing 42, and the second one-way bearing 42 is installed with a third synchronous wheel 43, and the third synchronous wheel 43 is connected to the other first synchronous wheel 35 through a second synchronous belt transmission, the first one-way bearing 37 and the second one-way bearing 42 have the same rotation direction, when the double-axis motor 33 is controlled to rotate forward, The dual-axis motor 33 can drive the two driving shafts 34 and the two first synchronous wheels 35 to rotate forward. Under the action of the first one-way bearing 37, the forward rotation of one of the first synchronous wheels 35 can drive the first driven shaft 36, the second synchronous wheel 38 and the fan blades 39 to rotate as a whole. Under the action of the second one-way bearing 42, the forward rotation of the other first synchronous wheel 35 can drive the second driven shaft 41, the third synchronous wheel 43 and the cleaning brush 44 to rotate as a whole. When the dual-axis motor 33 is controlled to rotate in the opposite direction, the dual-axis motor 33 can drive the two driving shafts 34 and the two first synchronous wheels 35 to rotate in the opposite direction. Under the action of the first one-way bearing 37, the reverse rotation of one of the first synchronous wheels 35 will only drive the second synchronous wheel 38 to rotate idly, and the fan blades 39 will not rotate. Under the action of the second one-way bearing 42, the reverse rotation of the other first synchronous wheel 35 will only drive the third synchronous wheel 43 to rotate idly, and the cleaning brush 44 will not rotate.

[0038] As attached Figure 4 As shown, a third driven shaft 48 is rotatably installed inside the second housing 12, a third one-way bearing 46 is installed on the outer surface of the third driven shaft 48, a fifth synchronous wheel 47 is installed on the third one-way bearing 46, a fourth synchronous wheel 45 is fixedly connected to the outer surface of one driving shaft 34, the fourth synchronous wheel 45 and the fifth synchronous wheel 47 are connected through a third synchronous belt transmission, the third one-way bearing 46 and the first one-way bearing 37 rotate in opposite directions, when the dual-axis motor 33 is controlled to rotate forward, the dual-axis motor 33 can drive the driving shaft 34 and the fourth synchronous wheel 45 to rotate forward, the fourth synchronous wheel 45 rotates forward only to drive the fifth synchronous wheel 47 to rotate idly, and the third driven shaft 48 will not rotate, when the dual-axis motor 33 is controlled to rotate reversely, the dual-axis motor 33 can drive the driving shaft 34 and the fourth synchronous wheel 45 to rotate reversely, the fourth synchronous wheel 45 rotates reversely to drive the fifth synchronous wheel 47 and the third driven shaft 48 to rotate as a whole.

[0039] As attached Figure 2-5As shown, a first reciprocating screw rod 13 is rotatably installed inside the first housing 11, and the first reciprocating screw rod 13 and the third driven shaft 48 are transmission connected by a first bevel gear set. The outer surface of the first reciprocating screw rod 13 is threadedly connected to a first threaded block 15, and the outer surface of the first threaded block 15 is fixedly connected to a first rectangular plate 16, and the first rectangular plate 16 is slidably connected to the inside of the first housing 11. The bottom surface of the first rectangular plate 16 is fixedly connected to two first slide plates 19, and the top of the fixed cylinder 4 is fixedly connected to a first fixed plate 17, and the outer surface of the first fixed plate 17 is fixedly connected to a support plate. The two first slide plates 19 away from the first rectangular plate 16 are slidably penetrated through the first fixed plate 17 and are fixedly connected to the second rectangular plate 20, and the bottom surfaces of the two second rectangular plates 20 are fixedly connected to the second slide plates 21, and the bottom surface of the fixed cylinder 4 is fixedly connected to the second fixed plate 18, and the two second slide plates 21 away from the second rectangular plate 20 are slidably penetrated through the second fixed plate 18 and are fixedly connected to the pull plate 22. The first bevel gear set is composed of two first bevel gears, one of which is a first bevel gear The first bevel gear is fixedly mounted on the outer surface of the third driven shaft 48, and another first bevel gear is fixedly mounted on the outer surface of the first reciprocating screw rod 13, and the two first bevel gears are meshed with each other. When the third driven shaft 48 rotates, the first reciprocating screw rod 13 can be driven to rotate, and the rotation of the first reciprocating screw rod 13 can drive the first threaded block 15 to reciprocate along the first reciprocating screw rod 13. When the filter cartridge 6 is in the initial position, the support plate contacts the inner bottom wall of the first box body 11 to prevent the filter cartridge 6 from continuing to move downward. When the first threaded block 15 reciprocates along the first reciprocating screw rod 13, the filter cartridge 6 is in the initial position. When the multifilament rod 13 moves upward, the first threaded block 15 can drive the first rectangular plate 16 to move upward. The upward movement of the first rectangular plate 16 can drive the first slide plate 19, the second rectangular plate 20, the second slide plate 21 and the pulling plate 22 to move upward. When the pulling plate 22 moves to contact with the second fixed plate 18, the first threaded block 15 continues to move upward to pull the second fixed plate 18, the filter cylinder 6 and the filter screen 7 upward. When the first threaded block 15 moves upward to the maximum extent, the filter screen 7 will move to be concentric with and contact with the cleaning brush 44.

[0040] As attached Figure 5-7 and Fig.12As shown, the outer surface of the connecting cylinder 5 is fixedly connected to two first wedge plates 8, and the outer surfaces of the two first wedge plates 8 are fixedly connected to the first sliders 9. The outer surface of the fixed cylinder 4 is fixedly connected to two box bodies 10. The two first sliders 9 are respectively slidably connected to the inside of the two box bodies 10, and a first elastic member is provided between the first sliders 9 and the box bodies 10. The two ends of the first elastic member are respectively fixedly connected to the first sliders 9 and the box bodies 10. The outer surface of the second rectangular plate 20 is fixedly connected to the second wedge plate 23 adapted to the first wedge plate 8. The second rectangular plate 20 is fixedly connected to the second wedge plate 23 through the first connecting plate. When the filter cylinder 6 is in the initial position, the second rectangular plate 20 moves upward. The second wedge plate 23 can be driven to move upward, and the upward movement of the second wedge plate 23 can squeeze the first wedge plate 8 to move to one side. The movement of the first wedge plate 8 can drive the first slider 9 and the connecting tube 5 to move accordingly and stretch the first elastic member, so that the clamping of the filter tube 6 can be released first. During the upward movement of the second wedge plate 23, the first wedge plate 8 can be continuously blocked. When the filter tube 6 moves downward to the initial position and the first threaded block 15 continues to drive the second rectangular plate 20 and the second wedge plate 23 to move downward, the second wedge plate 23 no longer blocks the first wedge plate 8, so that under the action of the first elastic member, the first wedge plate 8 will drive the connecting tube 5 to re-clamp the filter tube 6.

[0041] As attached Figure 2 , Figure 4 , Figure 8 , Fig. 9 , Fig.11 and Fig.14As shown, a second reciprocating screw rod 14 is rotatably installed inside the first housing 11, and the second reciprocating screw rod 14 and the third driven shaft 48 are connected by a second bevel gear set. The outer surface of the second reciprocating screw rod 14 is threadedly connected to a second threaded block 24, and the second threaded block 24 is slidably connected to the inside of the first housing 11. The second threaded block 24 is slidably connected to the air suction cylinder 25, and the air suction cylinder 25 is fixedly connected to a baffle plate 26 through a connecting rod, and an annular air suction groove is formed between the baffle plate 26 and the air suction cylinder 25. The second threaded block 24 is slidably connected to the air suction cylinder 25 through a second connecting plate. Specifically, a guide rod is fixedly connected to the second connecting plate, and the guide rod is slidably inserted into the inside of the second threaded block 24. The second bevel gear set consists of two second bevel gears, one of which is The second bevel gear is fixedly mounted on the outer surface of the third driven shaft 48, and another second bevel gear is fixedly mounted on the outer surface of the second reciprocating screw rod 14, and the two second bevel gears are meshed with each other. When the third driven shaft 48 rotates, the second reciprocating screw rod 14 can be driven to rotate. The rotation of the second reciprocating screw rod 14 can drive the second threaded block 24 to reciprocate along the second reciprocating screw rod 14. The movement of the second threaded block 24 can drive the suction cylinder 25 to move accordingly. When the filter cylinder 6 is in the initial position, the second threaded block 24 contacts the inner top wall of the first box body 11, and the first threaded block 15 contacts the inner bottom wall of the first box body 11. When the first reciprocating screw rod 13 and the second reciprocating screw rod 14 rotate, the rotation directions of the first threaded block 15 and the second threaded block 24 are opposite.

[0042] As attached Figure 2 , Figure 4 , Figure 8 Fig.13 As shown, a plurality of suction holes corresponding to the fan blades 39 are provided on one side of the first box body 11 close to the fan blades 39, and a wind guide hose is fixedly connected to the one side of the first box body 11 close to the fan blades 39, and the other end of the wind guide hose is fixedly connected to the suction pipe 27, and the other end of the suction pipe 27 is fixedly inserted in the interior of the suction cylinder 25. When the fan blades 39 are driven to rotate, suction can be performed, and the dust on the filter 7 can be sucked into the interior of the cylinder 49 through the suction holes, and the dust inside the shell 1 can enter the interior of the cylinder 49 through the annular suction groove, the suction pipe 27 and the wind guide hose in turn.

[0043] As attached Figure 8 and Fig. 9As shown, a side wall of the first box body 11 close to the air suction cylinder 25 is fixedly connected with a guide rail, and a second slider 30 is slidably connected to the guide rail. A side of the second slider 30 close to the air suction cylinder 25 is fixedly connected with an elastic telescopic rod 29, and the telescopic end of the elastic telescopic rod 29 is fixedly connected with a support block 28, and the support block 28 is fixedly connected to the top of the air suction cylinder 25. The top of the air suction cylinder 25 is fixedly connected with a first wedge block 31, and a second wedge block 32 adapted to the first wedge block 31 is fixedly connected to the side wall of the first box body 11 near the bottom. The fan blade 39 is composed of a cylinder and a round rod slidably connected to the inside of the cylinder. The cylinder and the round rod are connected by a second elastic member. When the second threaded block 24 moves downward along the second reciprocating screw rod 14, it can drive the air suction cylinder 25, the second slider 30 and the first wedge block 31 to move downward along the guide rail. When the wedge block 31 moves to contact with the second wedge block 32, the second threaded block 24 continues to move downward, and the second wedge block 32 will squeeze the first wedge block 31 to move in the direction of the shell body 1. The first wedge block 31 can drive the suction tube 25 to move in the direction of the shell body 1 and stretch the elastic telescopic rod 29. When the second threaded block 24 moves downward to the maximum extent, the suction tube 25 will move to the side that is concentric with the shell body 1 and close to the fixed tube 4, so that the annular suction groove can face the inner wall of the shell body 1, thereby ensuring the cleaning effect of the shell body 1. After cleaning is completed, when the second threaded block 24 moves upward, it can drive the suction tube 25 and the first wedge block 31 to move upward. At this time, under the action of the elastic telescopic rod 29, the suction tube 25 will gradually move in the direction away from the shell body 1, and then it will move upward with the second threaded block 24 to reset.

[0044] Working principle: When cleaning the flow meter, first control the double-axis motor 33 to rotate in the opposite direction, the double-axis motor 33 can drive the driving shaft 34 and the fourth synchronous wheel 45 to rotate in the opposite direction, the fourth synchronous wheel 45 rotates in the opposite direction to drive the third driven shaft 48, the first reciprocating screw rod 13 and the second reciprocating screw rod 14 to rotate, the first reciprocating screw rod 13 rotates to drive the first threaded block 15 to reciprocate along the first reciprocating screw rod 13, when the first threaded block 15 moves upward along the first reciprocating screw rod 13, the first threaded block 15 can drive the first rectangular plate 16 to move upward, the first rectangular plate 16 moves upward to drive the first slide plate 19, the second rectangular plate 20, the second slide plate 21, the pull plate 22 and the second wedge plate 23 move upward, the second wedge plate 23 moves upward to squeeze the first wedge plate 8 to move to one side, the movement of the first wedge plate 8 can drive the first slider 9 and the connecting tube 5 to move accordingly and stretch the first elastic member, so as to release the clamping of the filter tube 6 first, when the connecting tube 5 moves to the maximum extent in the direction away from the filter tube 6, the pulling plate 22 will move to contact with the second fixed plate 18, and then the first threaded block 15 continues to move upward to pull the second fixed plate 18, the filter tube 6 and the filter screen 7 to move upward, when the first threaded block 15 moves upward to the maximum extent, the filter screen 7 will move to be concentric with and contact with the cleaning brush 44.

[0045] At the same time, the rotation of the second reciprocating screw rod 14 can drive the second threaded block 24 to reciprocate along the second reciprocating screw rod 14. When the second threaded block 24 moves downward along the second reciprocating screw rod 14, the second threaded block 24 can drive the suction cylinder 25, the second slider 30 and the first wedge block 31 to move downward along the guide rail. When the first wedge block 31 moves to contact the second wedge block 32, the second threaded block 24 continues to move downward, and the second wedge block 32 will squeeze the first wedge block 31 to move in the direction of the shell 1. The first wedge block 31 can drive the suction cylinder 25 to move in the direction of the shell 1 and stretch the elastic telescopic rod 29. When the second threaded block 24 moves downward to the maximum extent, the suction cylinder 25 will move to the side that is concentric with the shell 1 and close to the fixed cylinder 4. At this time, the annular suction groove is facing the inner wall of the shell 1.

[0046] Then, the dual-axis motor 33 is controlled to rotate forward. The forward rotation of the dual-axis motor 33 can drive the fan blades 39 and the cleaning brush 44 to rotate. The rotation of the fan blades 39 can suction air, and the rotation of the cleaning brush 44 can brush off the dust on the filter 7. The dust on the filter 7 can be sucked into the interior of the cylinder 49 through the suction hole, and the dust inside the shell 1 can enter the interior of the cylinder 49 through the annular suction groove, the suction pipe 27 and the air guide hose in turn, so that the filter 7 and the shell 1 can be cleaned at the same time, thereby effectively improving the overall cleaning efficiency of the flow meter. Finally, continuing to control the dual-axis motor 33 to reverse can drive the filter cylinder 6, the filter 7 and the suction cylinder 25 to move to the initial position.

[0047] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An air flow meter for an automobile engine, comprising a cylindrical housing (1) and an air suction cylinder (25), characterized in that: A fixing cylinder (4) is fixedly mounted on the left side of the shell (1); a connecting cylinder (5) is arranged on the side of the fixing cylinder (4) away from the shell (1); a filter cylinder (6) is clamped between the connecting cylinder (5) and the fixing cylinder (4); a filter screen (7) is detachably mounted inside the filter cylinder (6); a first box body (11) is fixedly connected to the upper surface of the fixing cylinder (4); a second box body (12) is fixedly connected to the outer surface of the first box body (11); a cylinder (49) is fixedly connected to one side of the first box body (11); the cylinder (49) is fixedly mounted on the outer surface of the first box body (11); A first driven shaft (36) is rotatably mounted between the first housing (9) and the second housing (12), a fan blade (39) being fixedly connected to the outer surface of the first driven shaft (36), a second driven shaft (41) is rotatably mounted on a side of the first housing (11) away from the fan blade (39), a cleaning brush (44) being fixedly mounted to the outer surface of the second driven shaft (41), the suction cylinder (25) being fixedly connected to a baffle plate (26) via a connecting rod, an annular suction groove being formed between the baffle plate (26) and the suction cylinder (25), and a synchronization mechanism being arranged on one side of the housing (1).

2. An air flow meter for an automobile engine according to claim 1, characterized in that: A mounting hole is provided on the circumferential surface of the shell (1), a mounting tube (2) is fixedly connected to the mounting hole, a plug core (3) is detachably connected to the mounting tube (2), and a mounting ring is fixedly sleeved on the outer surface of the shell (1).

3. An air flow meter for an automobile engine according to claim 1, characterized in that: The synchronization mechanism comprises a double-shaft motor (33) mounted on the upper surface of a first housing (11); two output ends of the double-shaft motor (33) are fixedly connected to a driving shaft (34); ends of the two driving shafts (34) that are away from each other are rotatably mounted inside a second housing (12); the outer surfaces of the two driving shafts (34) are fixedly connected to a first synchronous wheel (35); a first one-way bearing (37) is mounted on the outer surface of the first driven shaft (36); a second synchronous wheel (38) is mounted on the first one-way bearing (37); the second synchronous wheel (38) is connected to one of the first synchronous wheels (35) through a first synchronous belt transmission; a second one-way bearing (42) is mounted on the outer surface of the second driven shaft (41); a third synchronous wheel (43) is mounted on the second one-way bearing (42); the third synchronous wheel (43) is connected to the other first synchronous wheel (35) through a second synchronous belt transmission.

4. An air flow meter for an automobile engine according to claim 3, characterized in that: A third driven shaft (48) is rotatably mounted inside the second housing (12); a third one-way bearing (46) is mounted on the outer surface of the third driven shaft (48); a fifth synchronous wheel (47) is mounted on the third one-way bearing (46); a fourth synchronous wheel (45) is fixedly connected to the outer surface of one of the driving shafts (34); and the fourth synchronous wheel (45) and the fifth synchronous wheel (47) are connected via a third synchronous belt transmission.

5. An air flow meter for an automobile engine according to claim 4, characterized in that: A first reciprocating screw (13) is rotatably mounted inside the first housing (11); the first reciprocating screw (13) and the third driven shaft (48) are connected in transmission via a first bevel gear set; the outer surface of the first reciprocating screw (13) is threadedly connected to a first threaded block (15); the outer surface of the first threaded block (15) is fixedly connected to a first rectangular plate (16); the first rectangular plate (16) is slidably connected to the inside of the first housing (11); the bottom surface of the first rectangular plate (16) is fixedly connected to two first slide plates (19); the top of the fixed cylinder (4) is fixedly connected to a A first fixed plate (17), the outer surface of the first fixed plate (17) is fixedly connected to a support plate, the sides of the two first slide plates (19) away from the first rectangular plate (16) slide through the first fixed plate (17) and are fixedly connected to the second rectangular plate (20), the bottom surfaces of the two second rectangular plates (20) are fixedly connected to the second slide plates (21), the bottom surface of the fixed cylinder (4) is fixedly connected to the second fixed plate (18), and the sides of the two second slide plates (21) away from the second rectangular plate (20) slide through the second fixed plate (18) and are fixedly connected to the pull plate (22).

6. An air flow meter for an automobile engine according to claim 5, characterized in that: The outer surface of the connecting cylinder (5) is fixedly connected to two first wedge plates (8), and the outer surfaces of the two first wedge plates (8) are both fixedly connected to a first slider (9). The outer surface of the fixed cylinder (4) is fixedly connected to two box bodies (10), and the two first sliders (9) are respectively slidably connected inside the two box bodies (10), and a first elastic member is provided between the first slider (9) and the box body (10), and two ends of the first elastic member are respectively fixedly connected to the first slider (9) and the box body (10). The outer surface of the second rectangular plate (20) is fixedly connected to a second wedge plate (23) adapted to the first wedge plate (8).

7. An air flow meter for an automobile engine according to claim 4, characterized in that: A second reciprocating screw (14) is rotatably mounted inside the first housing (11); the second reciprocating screw (14) and the third driven shaft (48) are transmission-connected via a second bevel gear set; a second threaded block (24) is threadedly connected to the outer surface of the second reciprocating screw (14); the second threaded block (24) is slidably connected to the inside of the first housing (11); and the second threaded block (24) is slidably connected to the air suction cylinder (25).

8. An air flow meter for an automobile engine according to claim 7, characterized in that: A plurality of air suction holes corresponding to the fan blades (39) are provided on a side of the first box body (11) close to the fan blades (39); an air guide hose is fixedly connected to the side of the first box body (11) close to the fan blades (39); the other end of the air guide hose is fixedly connected to an air suction pipe (27); the other end of the air suction pipe (27) is fixedly inserted into the interior of the air suction cylinder (25).

9. An air flow meter for an automobile engine according to claim 8, characterized in that: A side wall of the first box body (11) close to the air suction cylinder (25) is fixedly connected to a guide rail, a second slider (30) is slidably connected to the guide rail, a side of the second slider (30) close to the air suction cylinder (25) is fixedly connected to an elastic telescopic rod (29), a telescopic end of the elastic telescopic rod (29) is fixedly connected to a support block (28), and the support block (28) is fixedly connected to the top of the air suction cylinder (25).

10. An air flow meter for an automobile engine according to claim 9, characterized in that: A first wedge-shaped block (31) is fixedly connected to the top of the air suction cylinder (25), and a second wedge-shaped block (32) adapted to the first wedge-shaped block (31) is fixedly connected to a position near the bottom of the side wall of the first box body (11).

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