Oil control type range hood motor and production method thereof

Abstract

The invention relates to the technical field of motors, and discloses an oil control type range hood motor which comprises a stator, a rotor and a rotating shaft, the rotating shaft is connected with a front cover and a rear cover through a bearing and a shaft seal, and the front cover and the rear cover are arranged on the two sides of the rotor respectively; the stator, the front cover and the rear cover are plastically packaged in a plastic package body, and the rotor is arranged in an inner cavity of the plastic package body; a pumping base is fixedly arranged on the rear cover, an air compression device is arranged in a cavity formed by the pumping base and the rear cover and comprises a high-pressure air pipe, and the high-pressure air pipe is communicated with the inner cavity and fixed to the rear cover in a sealed mode. The problems that the motor performance is reduced and the service life is shortened due to the fact that an existing range hood motor is prone to being invaded by external greasy dirt are solved. Through the innovative structural design and production process, the oil control capability of the motor is remarkably improved, the internal cleanness of the motor is ensured, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to an oil-control type range hood motor. Background Art

[0002] In a kitchen environment, a range hood motor is in a working condition with a lot of oil stains for a long time. For traditional range hood motors, there are many defects in their sealing structures. External oil stains are easy to enter the motor interior through the gaps between the motor housing and the front cover and the rear cover, as well as the connections between the rotating shaft and the front cover and the rear cover. After the oil stains enter the motor interior, they will seriously affect the normal operation of the motor, such as causing increased wear of motor components, reducing the insulation performance of the motor, affecting the heat dissipation effect of the motor, thereby shortening the service life of the motor and increasing the maintenance cost. Therefore, it is of great practical significance to develop an oil-control type range hood motor that can effectively block external oil stains from entering. Summary of the Invention

[0003] The purpose of the present invention is to provide an oil-control type range hood motor and its production method, aiming to solve the problems that the existing range hood motors are vulnerable to external oil stain intrusion, resulting in a decline in motor performance and a shortening of the service life. Through innovative structural design and production processes, the oil-control ability of the motor is significantly improved, the cleanliness inside the motor is ensured, and the service life of the motor is extended.

[0004] The above technical purpose of the present invention is achieved through the following technical solutions: An oil-control type range hood motor includes a stator, a rotor, and a rotating shaft. The front cover and the rear cover are connected to the rotating shaft through bearings and shaft seals, and the front cover and the rear cover are respectively arranged on both sides of the rotor; the stator, the front cover, and the rear cover are plastic-sealed in a plastic-sealing body, and the rotor is placed in the inner cavity of the plastic-sealing body; A pump pressure base is fixedly provided on the rear cover. An air compression device is arranged in the cavity formed by the pump pressure base and the rear cover. The air compression device includes a high-pressure air pipe, and the high-pressure air pipe is communicated with the inner cavity and is fixedly sealed with the rear cover.

[0005] The rotating shaft is sealed with the front cover and the rear cover through shaft seals, thereby preventing external oil stains from entering the motor interior; by integrally plastic-sealing the front cover and the rear cover in the plastic-sealing body, the gaps between the existing motor housing and the front cover and the rear cover can be further eliminated, and external oil stains can be prevented from entering the motor interior from other joints, thereby further ensuring the sealing effect; at the same time, the air can be compressed through the air compression mechanism, and the compressed air enters the inner cavity of the plastic-sealing body, so that the air pressure inside the motor is greater than the air pressure in the external environment of the motor, thereby blocking external oil from entering from the outside to the inside and further improving the oil-control effect.

[0006] The present invention is further provided as follows: a cylinder hole is formed in the pump pressure base; The air compression device includes a piston inserted into a cylinder bore. A pin shaft is rotatably connected within a pin hole of the piston. The pin shaft is rotatably connected to one end of a connecting rod, and the other end of the connecting rod is rotatably connected to an eccentric shaft of a reduction gear. The reduction gear is rotatably connected to a pump pressure base through a bearing; the reduction gear meshes with a driving gear, and the driving gear is connected to a rotating shaft through a clutch mechanism; An air outlet check valve mechanism is provided between the cylinder bore and the high-pressure air pipe; An air inlet check valve mechanism is provided on the piston.

[0007] The rotating shaft drives the driving gear to rotate through the clutch mechanism. The driving gear drives the reduction gear to rotate. The reduction gear drives the piston to reciprocate within the cylinder bore through the eccentric shaft and the connecting rod. During the reciprocating movement of the piston, air is supplemented through the air inlet check valve mechanism, and the compressed air enters the high-pressure air pipe through the air outlet check valve. Finally, the compressed air is sent into the inner cavity of the plastic sealing body, making the air pressure inside the motor greater than the external air pressure.

[0008] The driving gear can be intermittently connected to the rotating shaft through the clutch mechanism, which can reduce the overall energy consumption of the motor.

[0009] The present invention is further configured as follows: The inner cavity is connected with a pressure sensor. The pressure sensor is fixed on the rear cover and electrically connected to a controller, and the controller controls the clutch mechanism. The pressure sensor can monitor the air pressure inside the motor in real time. When the air pressure is lower than the low-pressure set value, the controller controls the clutch mechanism to connect the rotating shaft and the driving gear for compressed air operation, thereby increasing the air pressure inside the motor. When the air pressure is higher than the high-pressure set value, the controller controls the clutch mechanism to disconnect the rotating shaft and the driving gear to stop the air compression work.

[0010] The present invention is further configured as follows: A spline hole, a spring installation hole, and a guide hole are formed at the end of the rotating shaft; The clutch mechanism includes a clutch part integrally provided with the driving gear, a tension spring with one end fixed in the spring installation hole, and an electromagnet fixed on the pump pressure base. The electromagnet faces the driving gear and the driving gear can be attracted by the electromagnet. The electromagnet is electrically connected to the controller; the clutch part is formed with a guide post and a spline shaft. The guide post is inserted into the guide hole, and the spline shaft is arranged in cooperation with the spline hole; the other end of the tension spring is fixedly connected to the clutch part; a spherical head ejector rod coaxially arranged with the clutch part is fixed on the pump pressure base, and the spherical head ejector rod is inserted into a limit core hole of the clutch part.

[0011] After the electromagnet is powered on, the electromagnet attracts the driving gear to approach the electromagnet, and the driving gear disengages from the reduction gear, thus disconnecting the connection; after the electromagnet is powered off, the driving gear loses the attraction of the electromagnet and is pulled by the tension spring to drive the gear to approach and engage with the reduction gear. The spherical head ejector rod can provide a central support and a guiding support for the rotating clutch part when it rotates, improving the stability of its rotation. At the same time, the spherical head ejector rod can limit the movement amplitude of the driving gear when the electromagnet attracts the driving gear, preventing the driving gear from contacting the electromagnet and causing wear to the electromagnet.

[0012] The present invention is further arranged such that: a rabbet matching with the rear cover is formed on the pump pressure base, and the rabbet is inserted and fixed on the rear cover. By providing the rabbet, the installation work of the pump pressure base and the rear cover is facilitated; The edge of the pump pressure base is also encapsulated in the encapsulation body. An air inlet hole is formed on the pump pressure base, and a sponge filter block is fixedly arranged in the air inlet hole. The outside air supplements air to the space formed by the pump pressure base and the rear cover through the air inlet hole. The entering air can be filtered through the sponge filter block to prevent foreign impurities from entering the motor interior and ensure the cleanliness inside the motor.

[0013] The present invention is further arranged such that: an air outlet channel communicating with the bottom of the cylinder hole is formed on the pump pressure base; The air outlet check valve mechanism includes a valve body fixed in the air outlet channel. A ventilation hole and a tapered hole are formed on the valve body. A valve ball is sleeved in the tapered hole. The valve ball is provided with a compression spring, and the compression spring abuts against the end of the high-pressure air pipe. The high-pressure air pipe is fixedly and hermetically connected to the air outlet channel. When the piston compresses the gas in the cylinder hole, the gas pressure in the cylinder hole becomes larger, thus pushing the valve ball away from the valve body. The compressed air enters the inner cavity of the encapsulation body through the high-pressure air pipe for internal pressure supplementation. When the piston moves outwards, the valve ball automatically abuts against the valve body under the action of the compression spring, preventing the high-pressure gas in the inner cavity of the encapsulation body from flowing out in the reverse direction.

[0014] The present invention is further arranged such that: a flat groove is formed at the inner end of the piston, an air inlet channel is formed on the bottom surface of the flat groove, and a sealing gasket installation groove is formed at the connection of the air inlet channel and the flat groove; The air inlet check valve mechanism includes a valve plate installed in the flat groove and a sealing gasket fixedly arranged in the sealing gasket installation groove. One end of the valve plate abuts against the sealing gasket, and the other end of the valve plate is fixedly connected to the flat groove; One end of the valve plate in contact with the sealing gasket faces the auxiliary spring, and the auxiliary spring is fixed in the counterbore on the bottom surface of the cylinder hole. When the piston moves outwards in the cylinder hole, the air pressure in the cylinder hole becomes lower, and the end of the valve plate in contact with the sealing gasket disengages from the sealing gasket under the action of the outside air pressure. The outside air enters the cylinder hole through the air inlet channel. When the piston moves inwards for compression work, the valve plate automatically fits against the sealing gasket again to prevent the gas in the cylinder hole from overflowing. The auxiliary compression spring can provide a supporting force for the valve plate during the process of the piston compressing the gas, thereby playing a better sealing role and improving the boosting effect of the air compression mechanism.

[0015] The present invention is further configured such that: the plastic encapsulation body includes a front plastic encapsulation half-body and a rear plastic encapsulation half-body, the stator, the outer edge of the pump pressure base, and the edge of the rear cover are plastic encapsulated within the front plastic encapsulation half-body, and the edge of the front cover is plastic encapsulated between the front plastic encapsulation half-body and the rear plastic encapsulation half-body; A plurality of grooves are preset on the end surface of the front plastic encapsulation half-body facing the rear plastic encapsulation half-body. By providing the grooves, the bonding ability between the front plastic encapsulation half-body and the rear plastic encapsulation half-body can be increased.

[0016] The present invention is further configured such that: a plurality of obliquely arranged retaining rings are formed on the inner wall of the shaft seal. The retaining rings are abutted against the outer wall of the rotating shaft and are arranged outward. Through the arrangement of multiple retaining rings, multiple layers of protection are formed, further increasing the resistance of external oil stains from entering the interior of the motor; at the same time, the retaining rings are arranged obliquely outward. When the air pressure inside the motor is relatively high, the inner end of the retaining ring is pressed to disengage from the rotating shaft, thereby forming a high-pressure gas outflow channel. This can prevent the motor from being damaged due to excessive internal air pressure, and at the same time, when the high-pressure gas flows out, it can blow the oil stains in the reverse direction, further preventing the oil stains from entering the interior of the motor.

[0017] A production method of an oil-control type range hood motor includes the following steps: S1: Assembling the air compression device and the pump pressure base; S1-1: Installing an intake check valve mechanism on the piston, and installing an outlet check valve mechanism and a reduction gear on the pump pressure base; S1-2: Inserting the piston into the cylinder bore; S1-3: Installing one end of the connecting rod to the piston through a pin shaft, and installing the other end of the connecting rod to the reduction gear; S2: Installing the clutch mechanism; S2-1: Installing the electromagnet on the pump pressure base; S2-2: Inserting the driving gear and the clutch part onto the spherical head push rod; S2-3: Fixing one end of the tension spring to the clutch part; S3: Installing the rear cover: Installing the rear cover onto the stop of the pump pressure base; S4: First plastic encapsulation: The components and the stator after step S3 are placed in a mold and filled with insulating glue. After the glue solidifies, a front plastic encapsulation half-body is formed; S5: Installing the rotor: S5-1: Installing the rotating shaft to the rotor; S5-2: Sequentially installing a shaft seal and a bearing on the rear cover; S5-3: Installing the rotating shaft to the rear cover and fixing the tension spring on the rotating shaft; S6: Installing the front cover: S6-1: Sequentially installing a shaft seal and a bearing on the front cover; S6-2: Installing the front cover to the rotating shaft and installing it onto the front plastic encapsulation half-body; S7: Second encapsulation: The components after step S6 are placed into the second sub-mold to pour in insulating glue liquid, and after the glue liquid solidifies, a rear encapsulation semi-body is formed.

[0018] The prominent effects of the present invention are: Compared with the prior art, for multiple-seal oil control: seals are provided between the rotating shaft and the front cover, and between the rotating shaft and the rear cover to prevent external oil stains from entering the interior of the motor. The front cover and the rear cover are integrally encapsulated in the encapsulation body, eliminating the gaps between the existing motor housing and the front cover and the rear cover, and further preventing external oil stains from entering from the joints. Compressed air is sent into the inner cavity of the encapsulation body through an air compression device, making the internal air pressure of the motor greater than the external air pressure, fundamentally preventing oil stain intrusion and significantly improving the oil control effect.

[0019] Energy-saving control: The air compression device can be intermittently connected to the rotating shaft through a clutch mechanism to reduce the overall energy consumption of the motor; a pressure sensor monitors the internal air pressure of the motor in real time and performs air compression work as needed.

[0020] Optimized shaft seal: Multiple inclined retaining rings on the inner wall of the shaft seal form multiple protections, increasing the resistance of external oil stains from entering the interior of the motor; when the internal air pressure of the motor is relatively high, the retaining rings are pressed and their inner ends are separated from the rotating shaft to form a high-pressure gas outflow channel, preventing the motor from being damaged due to excessive internal air pressure. At the same time, when the high-pressure gas flows out, it can blow the oil stains in the reverse direction, further preventing oil stains from entering.

[0021] Simplified structure: The structural design of the encapsulation body simplifies the assembly process of the motor and reduces the manufacturing cost. Description of the Drawings

[0022] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is Figure 1 a partial enlarged view of A; Figure 3 is Figure 2 a partial enlarged view of B.

[0023] Reference numerals: 11, stator; 12, rotor; 13, rotating shaft; 14, front cover; 15, rear cover; 131, spline hole; 132, spring mounting hole; 133, guiding hole; 2, shaft seal; 3, encapsulation body; 31, front encapsulation semi-body; 32, rear encapsulation semi-body; 33, groove; 4, pump pressure base; 41, cylinder hole; 42, rabbet; 43, air inlet hole; 44, sponge filter block; 45, air outlet channel; 5. Air compression device; 50. High-pressure air pipe; 51. Piston; 52. Pin shaft; 53. Connecting rod; 54. Reduction gear; 55. Driving gear; 56. Clutch mechanism; 57. Outlet check valve mechanism; 58. Inlet check valve mechanism; 59. Pressure sensor; 511. Flat groove; 512. Intake passage; 513. Gasket mounting groove; 514. Pin hole; 541. Eccentric shaft; 561. Clutch part; 562. Pull spring; 563. Electromagnet; 564. Guide post; 565. Spline shaft; 566. Ball head ejector rod; 567. Limit core hole; 571. Valve body; 572. Tapered hole; 573. Valve ball; 574. Compression spring; 581. Valve plate; 582. Gasket; 583. Auxiliary spring. Specific embodiments

[0024] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0025] The following reference Figures 1 to 3 is used to illustrate the embodiments of the present invention: Basic structure: As Figure 1 shown, the oil-control range hood motor includes a stator 11, a rotor 12, and a rotating shaft 13. A front cover 14 and a rear cover 15 are connected to the rotating shaft 13 through bearings and shaft seals 2, and the front cover 14 and the rear cover 15 are respectively disposed on both sides of the rotor 12. The stator 11, the front cover 14, and the rear cover 15 are plastic-sealed in a plastic-sealed body 3, and the rotor 12 is placed in the inner cavity 31 of the plastic-sealed body 3. A pump pressure base 4 is fixedly provided on the rear cover 15, and an air compression device 5 is provided in the cavity formed by the pump pressure base 4 and the rear cover 15. The air compression device 5 includes a high-pressure air pipe 50, and the high-pressure air pipe 50 is communicated with the inner cavity 31 and is fixedly sealed with the rear cover 15. Structure of the air compression device: As Figure 2 shown, a cylinder hole 41 is formed in the pump pressure base 4. The air compression device 5 includes a piston 51 inserted into the cylinder hole 41. A pin shaft 52 is rotatably connected in the pin hole 514 of the piston 51. One end of the pin shaft 52 is rotatably connected to one end of a connecting rod 53, and the other end of the connecting rod 53 is rotatably connected to the eccentric shaft 541 of a reduction gear 54. The reduction gear 54 is rotatably connected to the pump pressure base 4 through a bearing; the reduction gear 54 meshes with a driving gear 55, and the driving gear 55 is connected to the rotating shaft 13 through a clutch mechanism 56. An outlet check valve mechanism 57 is provided between the cylinder hole 41 and the high-pressure air pipe 50; an inlet check valve mechanism 58 is provided on the piston 51. Pressure monitoring structure: As Figure 1As shown, the inner cavity 31 is connected with a pressure sensor 59. The pressure sensor 59 is fixed on the rear cover 15 and electrically connected with a controller, and the controller controls the clutch mechanism. Structure of the clutch mechanism: At the end of the rotating shaft 13, a spline hole 131, a spring installation hole 132, and a guiding hole 133 are formed. The clutch mechanism 56 includes a clutch part 561 integrally provided with the driving gear 55, a tension spring 562 with one end fixed in the spring installation hole 132, and an electromagnet 563 fixed on the pump pressure base 4. The electromagnet 563 faces the driving gear 55 and the driving gear can be attracted by the electromagnet 563. The electromagnet is electrically connected with the controller; the clutch part 561 is formed with a guiding column 564 and a spline shaft 565. The guiding column 564 is inserted into the guiding hole 133, and the spline shaft 565 is arranged in cooperation with the spline hole 131; the other end of the tension spring 562 is fixedly connected with the clutch part 561; a spherical head push rod 566 coaxial with the clutch part 561 is fixed on the pump pressure base 4, and the spherical head push rod 566 is inserted into the limiting core hole 567 of the clutch part 561. Related structure of the pump pressure base: As Figure 1 shown, on the pump pressure base 4, a rabbet 42 matched with the rear cover 15 is formed. The rabbet 42 is inserted and fixed on the rear cover 15. The edge of the pump pressure base 4 is also encapsulated in the encapsulation body 3. An air inlet hole 43 is formed on the pump pressure base 4, and a sponge filter block 44 is fixed in the air inlet hole 43.

[0026] Structure of the air outlet check valve mechanism: As Figure 3 shown, an air outlet channel 45 communicating with the bottom of the cylinder hole 41 is formed on the pump pressure base 4. The air outlet check valve mechanism 57 includes a valve body 571 fixed in the air outlet channel 45. The valve body 571 is formed with a ventilation hole and a tapered hole 572. A valve ball 573 is sleeved in the tapered hole 572. The valve ball 573 is provided with a compression spring 574, and the compression spring 574 abuts against the end of the high-pressure air pipe 50. The high-pressure air pipe 50 is fixedly and sealingly connected with the air outlet channel 45. Structure of the air inlet check valve mechanism: As Figure 3 shown, a flat groove 511 is formed at the inner end of the piston 51. An air inlet channel 512 is formed on the bottom surface of the flat groove 511. A gasket installation groove 513 is formed at the connection of the air inlet channel 512 and the flat groove 511. The air inlet check valve mechanism 58 includes a valve piece 581 installed in the flat groove 511 and a gasket 582 fixed in the gasket installation groove 513. One end of the valve piece 581 abuts against the gasket 582, and the other end of the valve piece 581 is fixedly connected with the flat groove 511. One end of the valve piece 581 in contact with the gasket 582 faces the auxiliary spring 583, and the auxiliary spring 583 is fixed in the counterbore 46 at the bottom surface of the cylinder hole 41. Structure of the encapsulation body: As Figure 1As shown, the plastic-sealed body 3 includes a front plastic-sealed half-body 31 and a rear plastic-sealed half-body 32. The stator 11, the outer edge of the pump pressure base 4, and the edge of the rear cover 15 are plastic-sealed within the front plastic-sealed half-body 31, and the edge of the front cover 14 is plastic-sealed between the front plastic-sealed half-body 31 and the rear plastic-sealed half-body 32. A plurality of grooves 33 are preset on the end face of the front plastic-sealed half-body 31 facing the rear plastic-sealed half-body 32. Shaft seal structure: As Figure 1 shown, a plurality of obliquely arranged retaining rings 21 are formed on the inner wall of the shaft seal 2. The retaining rings 21 are abutted against the outer wall of the rotating shaft 13 and are arranged outward. Production method of oil-control range hood motor: S1: Subassembly of the air compression device 5 and the pump pressure base 4: S1-1: An intake one-way valve mechanism 58 is installed on the piston 51, and an exhaust one-way valve mechanism 57 and a reduction gear 54 are installed on the pump pressure base 4; S1-2: The piston 51 is inserted into the cylinder bore 41; S1-3: One end of the connecting rod 53 is installed on the piston 51 through a pin shaft 52, and the other end of the connecting rod 53 is installed on the reduction gear 54; S2: Installation of the clutch mechanism 56: S2-1: The electromagnet 563 is installed on the pump pressure base 4; S2-2: The driving gear 55 and the clutch part 561 are inserted and sleeved on the spherical head push rod 566; S2-3: One end of the tension spring 562 is fixed on the clutch part 561; S3: Installation of the rear cover: The rear cover 15 is installed on the rabbet 42 of the pump pressure base 4; S4: First plastic sealing: The components after step S3 and the stator 11 are placed in a mold to pour insulating glue liquid, and after the glue liquid solidifies, a front plastic-sealed half-body 31 is formed; S5: Installation of the rotor: S5-1: The rotating shaft 13 is installed on the rotor 12; S5-2: The shaft seal 2 and the bearing are successively installed on the rear cover 15; S5-3: The rotating shaft 13 is installed on the rear cover, and the tension spring 562 is fixed on the rotating shaft 13; S6: Installation of the front cover: S6-1: The shaft seal 2 and the bearing are successively installed on the front cover 14; S6-2: The front cover 14 is installed on the rotating shaft 13 and installed on the front plastic-sealed half-body 31; S7: Second plastic sealing: The components after step S6 are placed in a second set of molds to pour insulating glue liquid, and after the glue liquid solidifies, a rear plastic-sealed half-body 32 is formed.

[0027] When the motor is working, the rotating shaft 13 drives the driving gear 55 to rotate through the clutch mechanism 56. When the clutch mechanism is in the connected state, the driving gear drives the reduction gear 54 to rotate. The reduction gear drives the piston 51 to reciprocate in the cylinder bore 41 through the eccentric shaft 541 and the connecting rod. When the piston moves towards the connecting rod, the air pressure in the cylinder bore becomes lower, and the intake check valve mechanism opens, allowing external air to enter the cylinder bore through the intake passage. When the piston moves towards the bottom surface of the cylinder bore to compress the gas, the gas pressure in the cylinder bore becomes higher, and the outlet check valve mechanism opens. The compressed air enters the inner cavity of the plastic sealing body through the high-pressure air pipe, making the internal air pressure of the motor greater than the external air pressure, thereby preventing external oil stains from entering. The pressure sensor continuously monitors the internal air pressure of the motor. When the air pressure is lower than the low-pressure set value, the controller controls the clutch mechanism to connect the rotating shaft and the driving gear to perform compressed air operation; when the air pressure is higher than the high-pressure set value, the controller controls the clutch mechanism to disconnect the rotating shaft and the driving gear to stop the air compression work.

[0028] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made under the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. An oil-control range hood motor, comprising a stator (11), a rotor (12) and a rotating shaft (13), characterized in that: A front cover (14) and a rear cover (15) are connected to a rotating shaft (13) through bearings and shaft seals (2); a stator (11), the front cover (14) and the rear cover (15) are encapsulated in an encapsulation body (3), and a rotor (12) is placed in the inner cavity (31) of the encapsulation body (3). A pump pressure base (4) is fixedly provided on the rear cover (15). An air compression device (5) is arranged in the cavity formed by the pump pressure base (4) and the rear cover (15). The air compression device (5) includes a high-pressure air pipe (50), and the high-pressure air pipe (50) is communicated with the inner cavity (31) and is fixedly sealed with the rear cover (15).

2. The oil-control range hood motor according to claim 1, characterized in that: A cylinder hole (41) is formed in the pump pressure base (4). The air compression device (5) includes a piston (51) inserted in the cylinder hole (41). A pin shaft (52) is rotatably connected in a pin hole (514) of the piston (51). One end of the pin shaft (52) is rotatably connected to one end of a connecting rod (53), and the other end of the connecting rod (53) is rotatably connected to an eccentric shaft (541) of a reduction gear (54); the reduction gear (54) meshes with a driving gear (55), and the driving gear (55) is connected to the rotating shaft (13) through a clutch mechanism (56). An air outlet one-way valve mechanism (57) is arranged between the cylinder hole (41) and the high-pressure air pipe (50). An air inlet one-way valve mechanism (58) is arranged on the piston (51).

3. The oil-control range hood motor according to claim 2, wherein: The inner cavity (31) is connected with a pressure sensor (59).

4. The oil-control range hood motor according to claim 2, characterized in that: Splined holes (131), spring installation holes (132) and guide holes (133) are formed at the end of the rotating shaft (13). The clutch mechanism (56) includes a clutch part (561) integrally provided with the driving gear (55), a tension spring (562) with one end fixed in the spring installation hole (132) and an electromagnet (563) fixedly arranged on the pump pressure base (4); the clutch part (561) is formed with a guide post (564) and a spline shaft (565), and the other end of the tension spring (562) is fixedly connected to the clutch part (561); a ball head ejector rod (566) coaxially arranged with the clutch part (561) is fixed on the pump pressure base (4), and the ball head ejector rod (566) is inserted in a limit core hole (567) of the clutch part (561).

5. The oil-control range hood motor according to claim 2, characterized in that: A stop (42) matched with the rear cover (15) is formed on the pump pressure base (4). The edge of the pump pressure base (4) is encapsulated in the encapsulation body (3). An air inlet hole (43) is formed on the pump pressure base (4), and a sponge filter block (44) is fixedly arranged in the air inlet hole (43).

6. The oil-control range hood motor according to claim 2, characterized in that: An air outlet channel (45) communicated with the bottom of the cylinder hole (41) is formed on the pump pressure base (4). The air outlet one-way valve mechanism (57) includes a valve body (571) fixed in the air outlet channel (45). A ventilation hole and a tapered hole (572) are formed on the valve body (571). A valve ball (573) is sleeved in the tapered hole (572), and a compression spring (574) is arranged on the valve ball (573).

7. The oil-control range hood motor according to claim 2, wherein: A flat groove (511) is formed at the inner end of the piston (51). An air inlet channel (512) is formed on the bottom surface of the flat groove (511). A gasket installation groove (513) is formed at the connection of the air inlet channel (512) and the flat groove (511). The intake check valve mechanism (58) includes a valve disc (581) installed in the flat groove (511) and a gasket (582) fixedly arranged in the gasket installation groove (513). One end of the valve disc (581) abuts against the gasket (582), and the other end of the valve disc (581) is fixedly connected to the flat groove (511). One end of the valve disc (581) in contact with the gasket (582) faces the auxiliary spring (583).

8. The oil-control range hood motor according to claim 1, wherein: The plastic-sealed body (3) includes a front plastic-sealed semi-body (31) and a rear plastic-sealed semi-body (32). The stator (11), the outer edge of the pump pressure base (4), and the edge of the rear cover (15) are plastic-sealed in the front plastic-sealed semi-body (31), and the edge of the front cover (14) is plastic-sealed between the front plastic-sealed semi-body (31) and the rear plastic-sealed semi-body (32). A plurality of grooves (33) are preset on the end face of the front plastic-sealed semi-body (31) facing the rear plastic-sealed semi-body (32).

9. The oil-control range hood motor according to claim 1, wherein: A plurality of retaining rings (21) are formed on the inner wall of the shaft seal (2) and are arranged obliquely. The retaining rings (21) abut against the outer wall of the rotating shaft (13) and are arranged outward.

10. A production method of an oil-control range hood motor, characterized in that: It includes the following steps: S1: Sub-assembly of the air compression device (5) and the pump pressure base (4); S1-1: Install the intake check valve mechanism (58) on the piston (51), and install the outlet check valve mechanism (57) and the reduction gear (54) on the pump pressure base (4); S1-2: Insert the piston (51) into the cylinder bore (41); S1-3: One end of the connecting rod (53) is installed on the piston (51) through a pin shaft (52), and the other end of the connecting rod (53) is installed on the reduction gear (54); S2: Install the clutch mechanism (56); S2-1: Install the electromagnet (563) on the pump pressure base (4); S2-2: Insert and sleeve the drive gear (55) and the clutch part (561) on the spherical head push rod (566); S2-3: Fix one end of the tension spring (562) on the clutch part (561); S3: Install the rear cover: Install the rear cover (15) on the stop (42) of the pump pressure base (4); S4: First plastic sealing: The components after step S3 and the stator (11) are placed in a mold to pour insulating glue, and after the glue solidifies, a front plastic-sealed semi-body (31) is formed; S5: Install the rotor: S5-1: Install the rotating shaft (13) on the rotor (12); S5-2: Install the shaft seal (2) and the bearing on the rear cover (15) in sequence; S5-3: Install the rotating shaft (13) on the rear cover, and fix the tension spring (562) on the rotating shaft (13); S6: Install the front cover: S6-1: Install the shaft seal (2) and the bearing on the front cover (14) in sequence; S6-2: Install the front cover (14) on the rotating shaft (13) and install it on the front plastic-sealed semi-body (31); S7: Second plastic sealing: The components after step S6 are placed in a second mold to pour insulating glue, and after the glue solidifies, a rear plastic-sealed semi-body (32) is formed.

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