Oxygen increasing pump speed reducer

Abstract

An oxygenation pump speed reducer comprises a motor and a planet gear speed reducer installed at the output end of the motor, the planet gear speed reducer comprises a shell, a gear shaft, a planet carrier and at least three planet gears, the gear shaft, the planet carrier and the at least three planet gears are arranged in the shell, the planet gears are installed in the planet carrier and arranged in a helical tooth mode, and the shell comprises an output gear ring. The three planetary gears are meshed in the output gear ring, an output shaft of the motor is connected with the gear shaft, the three planetary gears are arranged around the gear shaft and meshed with the lower transmission gear ring of the gear shaft, the motor drives the gear shaft to rotate and synchronously drives the planetary gears to rotate in the output gear ring, and the planet carrier comprises an upper frame and a lower frame. The planetary gear is rotationally installed between the upper frame and the lower frame, the outer side wall face of the upper end of the upper frame and the shell are closed through a first oil seal, and the inner side wall face of the upper end of the upper frame and the gear shaft are closed through a second oil seal. The invention provides a speed reducer of an oxygenation pump. The speed reducer has the performance of being low in noise and good in sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of fishery breeding equipment, and in particular to a speed reducer for an oxygen pump. Background Art

[0002] Reducers are usually used in conjunction with motors and are generally used in low-speed and high-torque transmission equipment. The power of the electric motor, internal combustion engine or other high-speed running power is reduced by meshing the gear with a small number of teeth on the input shaft of the reducer with the large gear on the output shaft to achieve the purpose of deceleration. In aquaculture, oxygen pumps are an indispensable oxygenation equipment and are widely used in various aquaculture waters. However, traditional oxygen pump reducers have some inherent problems in their structure, such as poor sealing performance, short service life and high noise. These problems directly affect the working effect and user experience of the oxygen pump, limiting its further application in aquaculture.

[0003] Specifically, the seal position design on the traditional reducer structure is unreasonable, which is easy to get into water, causing the reducer to frequently fail during use, and the life cycle is often only 3-6 months. In addition, the gear parameters of the traditional reducer are not ideal. The internal teeth use a straight tooth structure with low overlap, which not only affects the transmission efficiency, but also causes high noise, causing certain noise pollution to the breeding environment. Summary of the invention

[0004] The embodiments of this specification provide an oxygen pump reducer and an assembly method that can reduce noise and have good sealing performance.

[0006] Technical Solution

[0007] To solve the technical problem, the present invention provides the following technical solution: an oxygen pump reducer, comprising a motor and a planetary gear reducer installed at the output end of the motor, the planetary gear reducer comprising a housing, a gear shaft, a planetary carrier and at least three planetary gears arranged inside the housing, the planetary gears being installed in the planetary carrier, the planetary gears being arranged in a helical gear pattern, the housing comprising an output gear ring, three planetary gears being meshed in the output gear ring, the output shaft of the motor being connected to the gear shaft, the three planetary gears being arranged around the gear shaft, the three planetary gears being meshed with the lower transmission gear ring of the gear shaft, the motor driving the gear shaft to rotate, and synchronously driving the planetary gears to rotate in the output gear ring, the planetary carrier comprising an upper frame and a lower frame, the planetary gears being rotatably installed between the upper frame and the lower frame, the upper end outer wall surface of the upper frame being sealed with the housing through a first oil seal, and the upper end inner wall surface of the upper frame being sealed with the gear shaft through a second oil seal.

[0008] Compared with the prior art, the advantages of the present invention are as follows: Three planetary gears are circumferentially distributed around the central axis of the gear shaft. The same gear shaft drives the rotation of multiple planetary gear shafts. Compared with the traditional reduction gear in which one gear rotates around another gear, the transmission efficiency is higher and it is more energy-saving; moreover, multiple planetary gears share the force, so the service life is long and the noise generated is less; the same planetary gear meshes with the lower transmission gear ring and the output gear ring of the gear shaft at the same time, with high transmission accuracy and good stability; at the same time, the planetary gears are arranged as helical gears, with high transmission efficiency, long service life, and less noise during operation, further reducing the noise during the working process; through the setting of the first oil seal and the second oil seal, the oil of the motor and the intrusion of water, dust, etc. from the outside into the equipment are prevented. The first oil seal is a static oil seal to ensure the reliable positioning of the outer edge of the first oil seal between the equipment cavities. When the gear shaft rotates, the second oil seal is a dynamic oil seal, and when the gear shaft does not rotate, the second oil seal is a static oil seal; the first oil seal is arranged between the outer side wall surface of the upper end of the upper frame and the housing. Compared with the oil seal of the reduction gear arranged between the housing and the cover plate, since the cover plate is cast and a pressurized steel sleeve is required, the coaxiality of the secondary installation cannot be guaranteed and it is easy to leak water. In contact with the planet carrier, there is no need for secondary installation, which can ensure the coaxiality and the roughness at the same time.

[0009] In some embodiments, a cover plate is provided between the housing and the motor. A water blocking portion is provided on the lower end surface of the cover plate. The inner side wall surface of the water blocking portion abuts against the outer side wall surface of the upper end of the housing. Through the above improvement, the setting of the water blocking portion further enhances the waterproof and dustproof functions of the reduction gear.

[0010] In some embodiments, the output shaft of the motor is connected to the gear shaft through a connecting member. Upper connecting gear rings and lower connecting gear rings are respectively provided at both ends of the inner hole of the connecting member. The output shaft is inserted into the upper inner hole of the connecting member, and the output shaft meshes with the upper connecting gear ring. The gear shaft is inserted into the lower inner hole of the connecting member. An upper transmission gear ring is provided on the upper section of the gear shaft, and the upper transmission gear ring meshes with the lower connecting gear ring. The upper end of the upper frame includes a receiving groove. The second oil seal is installed at the bottom end of the receiving groove. A cavity is formed between the wall surface of the receiving groove and the connecting member. An oil hole is provided on the side wall of the connecting member. Through the above improvement, a cavity is formed between the wall surface of the receiving groove and the connecting member, enabling the oil of the motor to enter the cavity and pass through the oil hole to reuse the leaked oil, which plays a lubricating role for the connecting member and the gear shaft, and the connecting member and the output shaft. At the same time, the setting of the oil hole plays a cooling role. Heat is generated by the friction between the connecting member and the gear shaft, and between the connecting member and the output shaft. The oil will absorb and carry away this heat, and at the same time play a role in protecting against rust with an oil film.

[0011] In some embodiments, the housing includes an output flange and a gear ring flange. The gear ring flange, the output gear ring, and the output flange are sequentially connected by bolts from top to bottom. Through the above improvement, the installation and disassembly are convenient, which is convenient for checking the internal state of the equipment and for repairing the inside of the equipment.

[0012] In some embodiments, a sealing glue application process is carried out at the connection between the upper frame and the cover plate, and the upper frame and the cover plate are connected by bolts. A first bearing is provided between the upper frame and the housing, and the first bearing is arranged below the first oil seal. A sealing glue application process is carried out at the joint between the upper frame and the first bearing. Through the above improvements, the waterproof and dustproof performance is further enhanced by the sealing glue process, achieving a multiple sealing effect.

[0013] In some embodiments, a rotating shaft is inserted into the central hole of the planetary gear. The two ends of the rotating shaft are respectively connected to the upper frame and the lower frame. Needle rollers are provided between the outer side wall surface of the rotating shaft and the side wall surface of the central hole of the planetary gear, and the needle rollers are arranged in a surrounding manner along the side wall surface of the planetary gear. Through the above improvements, the setting of the needle rollers reduces friction and improves efficiency, making the planetary gear run more smoothly and enhancing its service life.

[0014] In some embodiments, a second bearing is provided between the gear shaft and the upper frame. A retaining edge is axially provided on the gear shaft, and the second bearing is arranged above the retaining edge. Through the above improvements, the setting of the retaining plate prevents the second bearing from moving downwards, improving the working stability of the equipment.

[0015] In some embodiments, a first sealing block protrudes downward from the ring gear flange, and a second sealing block protrudes upward from the output flange. The outer side wall surface of the first sealing block abuts against the inner side wall surface of the output ring gear. A first sealing groove is provided on the connecting wall surface between the first sealing block and the output ring gear, and a sealing O-ring is arranged in the first sealing groove. The outer side wall surface of the second sealing block abuts against the inner side wall surface of the output ring gear. A second sealing groove is provided on the connecting wall surface between the second sealing block and the output ring gear, and a sealing O-ring is arranged in the second sealing groove. Through the above improvements, the sealing performance of the equipment is further enhanced. The first sealing block or the second sealing block cooperates with the sealing O-ring for double sealing, and the sealing performance is good.

[0016] In some embodiments, the helix angles of the lower transmission ring gear, the planetary gear, and the output ring gear are 15°, the tooth widths are all 15 mm, the number of teeth of the lower transmission ring gear is 11, the number of teeth of the planetary gear is 49, and the number of teeth of the output ring gear is 109. Through the above improvements, the gear contact ratio is good, and the noise is further reduced.

[0017] In some embodiments, the outer surface of the housing is painted. Through the above improvements, the anti-corrosion performance is good, providing additional physical protection, reducing the influence of the external environment on the housing, and increasing the service life of the reducer.

[0018] Beneficial effects

[0019] The present invention provides an oxygen pump reducer, in which three planetary gears are distributed in a circle around the central axis of a gear shaft, and the same gear shaft drives multiple planetary gear shafts to rotate. Compared with the traditional reducer in which one gear rotates around another gear, the transmission is higher and more energy-saving; and the multiple planetary gears share the force, have a long service life, and emit less noise; the same planetary gear simultaneously meshes with the lower transmission ring gear and the output ring gear of the gear shaft, with high transmission accuracy and good stability; at the same time, the planetary gears are arranged with helical teeth, with high transmission, long service life, and less noise during operation, further reducing the noise during the working process, the helix angle of the lower transmission ring gear, the planetary gears and the output ring gear is 15°, the tooth width is 15mm, the number of teeth of the lower transmission ring gear is 11, the number of teeth of the planetary gear is 49, the number of teeth of the output ring gear is 109, the gear overlap is good, and the noise is further reduced;

[0020] The first oil seal and the second oil seal are provided to prevent the oil of the motor, water, dust, etc. from invading the inside of the equipment from the outside; the first oil seal is provided between the outer wall of the upper end of the upper frame and the shell, compared with the reducer oil seal provided between the shell and the cover plate, because the cover plate is cast, a pressurized steel sleeve is required, the coaxiality of the secondary installation cannot be guaranteed, it is easy to leak, and it contacts the planetary carrier without secondary installation, ensuring the coaxiality while ensuring the roughness, the setting of the water retaining part further increases the waterproof and dustproof function of the reducer, and the waterproof and dustproof performance is further improved through the sealant process, achieving the effect of multiple sealing;

[0021] A cavity is formed between the wall of the accommodating groove and the connecting piece, so that the oil of the motor enters the cavity and is reused through the oil hole to lubricate the connecting piece and the gear shaft, as well as the connecting piece and the output shaft. At the same time, the setting of the oil hole has a cooling effect. The friction between the connecting piece and the gear shaft, as well as the connecting piece and the output shaft generates heat, and the oil will absorb and take away the heat, while also playing the role of oil film protection and rust prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0025] Figure 3 It is a cross-sectional structural schematic diagram of another angle of the present invention;

[0026] Figure 4 Schematic cross-sectional structure diagram after separation from the motor of the present invention;

[0027] Figure 5 Schematic structure diagram of the cover plate of the present invention;

[0028] Figure 6 Schematic internal structure diagram of the housing of the present invention;

[0029] Figure 7 Schematic structure diagram of the planetary gear of the present invention;

[0030] Figure 8 Schematic structure diagram of the gear shaft of the present invention;

[0031] Figure 9 Exploded structure diagram of the housing of the present invention;

[0032] Figure 10 Schematic structure diagram of the output gear ring of the present invention;

[0033] Figure 11 Schematic structure diagram of the connecting member of the present invention;

[0034] Figure 12 Schematic cross-sectional structure diagram of the connecting member of the present invention.

[0035] In the figure: 1. Motor; 1.1 Output shaft; 2. Housing; 2.1 Output flange; 2.1.1 First seal block; 2.1.2 First seal groove; 2.2 Ring gear flange; 2.2.1 Second seal block; 2.2.2 Second seal groove; 2.3 Output gear ring; 3. Gear shaft; 3.1 Upper transmission gear ring; 3.2 Lower transmission gear ring; 3.3 Rib; 4. Planet carrier; 4.1 Upper frame; 4.1.1 Accommodating groove; 4.2 Lower frame; 5. Planetary gear; 5.1 Rotating shaft; 5.2 Needle roller; 6. First oil seal; 7. Second oil seal; 8. Cover plate; 8.1 Water-blocking part; 9. Connecting member; 9.1 Upper connecting gear ring; 9.2 Lower connecting gear ring; 9.3 Oil hole; 10. First bearing; 11. Second bearing; 12. Sealing O-ring; 13. Third bearing; 14. Fourth bearing. Detailed implementation manners

[0036] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. The present application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0038] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. Additionally, this device and / or this method can be implemented using other structures and / or functionality in addition to one or more of the aspects described herein.

[0039] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application schematically. The diagrams only show the components related to the present application and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0040] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0041] The following describes the technical solutions provided by each embodiment of the present application in conjunction with the accompanying drawings.

[0042] Please refer to Figure 1-4As shown in the present embodiment: An aerator reducer includes a motor 1 and a planetary gear reducer installed at the output end of the motor 1. The planetary gear reducer includes a housing 2, a gear shaft 3, a planet carrier 4, and at least three planetary gears 5 disposed inside the housing 2. The planetary gears 5 are installed within the planet carrier 4 and are helical gears. The housing 2 includes an output gear ring 2.3. The three planetary gears 5 mesh within the output gear ring 2.3. The output shaft 1.1 of the motor 1 is connected to the gear shaft 3. The three planetary gears 5 are arranged around the gear shaft 3. The three planetary gears 5 mesh with the lower transmission gear ring 3.2 of the gear shaft 3. The motor 1 drives the gear shaft 3 to rotate and simultaneously drives the planetary gears 5 to rotate within the output gear ring 2.3. The planet carrier 4 includes an upper frame 4.1 and a lower frame 4.2. The planetary gears 5 are rotatably installed between the upper frame 4.1 and the lower frame 4.2. The outer side wall surface of the upper end of the upper frame 4.1 forms a seal with the housing 2 through a first oil seal 6, and the inner side wall surface of the upper end of the upper frame 4.1 forms a seal with the gear shaft 3 through a second oil seal 7.

[0043] The three planetary gears 5 are circumferentially distributed around the central axis of the gear shaft 3. The same gear shaft 3 drives multiple planetary gears 5 to rotate around the shaft 3. Compared with the traditional reducer where one gear rotates around another gear, the transmission efficiency is higher and it is more energy-efficient. Moreover, multiple planetary gears 5 share the force, resulting in a long service life and less noise generated. The same planetary gear 5 meshes with both the lower transmission gear ring 3.2 of the gear shaft 3 and the output gear ring 2.3 simultaneously, providing high transmission accuracy and good stability. At the same time, the planetary gears 5 are helical gears, with high transmission efficiency, long service life, and less noise during operation, further reducing the noise during the working process. Through the arrangement of the first oil seal 6 and the second oil seal 7, it prevents the oil of the motor 1 and prevents water, dust, etc. from invading the interior of the equipment from the outside. The first oil seal 6 is a static oil seal, ensuring the reliable positioning of the outer edge of the first oil seal 6 between the equipment cavities. When the gear shaft 3 rotates, the second oil seal 7 is a dynamic oil seal, and when the gear shaft 3 does not rotate, the second oil seal 7 is a static oil seal. The first oil seal 6 is provided between the outer side wall surface of the upper end of the upper frame 4.1 and the housing 2. Compared with the oil seal of the reducer being provided between the housing 2 and the cover plate 8, since the cover plate 8 is cast, a pressure-increasing steel sleeve is required, and the coaxiality during secondary installation cannot be guaranteed, making it prone to water leakage. In contact with the planet carrier 4, no secondary installation is required, ensuring coaxiality and surface roughness at the same time.

[0044] In some embodiments, as Figure 4 - Figure 5 shown, a cover plate 8 is provided between the housing 2 and the motor 1. A water-blocking portion 8.1 is provided on the lower end surface of the cover plate 8. The inner side wall surface of the water-blocking portion 8.1 abuts against the outer side wall surface of the upper end of the housing 2. It should be noted that the arrangement of the water-blocking portion 8.1 further enhances the waterproof and dustproof functions of the reducer.

[0045] It should be pointed out that: The water-blocking portion 8.1 is in radial fit with the outer side wall surface of the upper end of the housing 2, and the radial clearance is 0.1 - 0.2 mm.

[0046] In some embodiments, Figure 4 as well as Figure 11 - Figure 12 As shown, the output shaft 1.1 of the motor 1 is connected to the gear shaft 3 through a connecting member 9, and the two ends of the inner hole of the connecting member 9 are respectively provided with an upper connecting gear ring 9.1 and a lower connecting gear ring 9.2, the output shaft 1.1 is inserted into the upper end inner hole of the connecting member 9, and the output shaft 1.1 is meshed with the upper connecting gear ring 9.1, the gear shaft 3 is inserted into the lower end inner hole of the connecting member 9, the upper section of the gear shaft 3 is provided with an upper transmission gear ring 3.1, and the upper transmission gear ring 3.1 is meshed with the lower connecting gear ring 9.2, the upper end of the upper frame 4.1 includes a receiving groove 4.1.1, and the second oil seal 7 is installed at the bottom of the receiving groove 4.1.1. A cavity is formed between the wall surface of 4.1.1 and the connecting member 9, and an oil hole 9.3 is provided on the side wall of the connecting member 9. It should be noted that a cavity is formed between the wall surface of the accommodating groove 4.1.1 and the connecting member 9, so that the oil of the motor 1 enters the cavity and passes through the oil hole 9.3, and the leaked oil is reused, which plays a role of wheel skating for the connecting member 9 and the gear shaft 3, and the connecting member 9 and the output shaft 1.1. At the same time, the setting of the oil hole 9.3 plays a cooling role. The friction between the connecting member 9 and the gear shaft 3, and the connecting member 9 and the output shaft 1.1 generates heat, and the oil will absorb and take away the heat, and at the same time play an oil film protection and rust prevention role.

[0047] In some embodiments, Figure 9 - Figure 10 As shown, the housing 2 includes an output flange 2.1 and a gear ring flange 2.2. The gear ring flange 2.2, the output gear ring 2.3 and the output flange 2.1 are connected by bolts from top to bottom. It should be noted that it is easy to install and disassemble, easy to check the internal state of the equipment, and easy to repair the inside of the equipment.

[0048] In some embodiments, Figure 4 As shown, the connection between the upper frame 4.1 and the cover plate 8 is processed by applying sealant, and the upper frame 4.1 and the cover plate 8 are connected by bolts. A first bearing 10 is provided between the upper frame 4.1 and the gear ring flange 2.2, and the first bearing 10 is provided below the first oil seal 6. The connection between the upper frame 4.1 and the first bearing 10 is processed by applying sealant. It should be noted that the sealant process further improves the waterproof and dustproof performance, and achieves a multiple sealing effect.

[0049] In some embodiments, Figure 3 As shown, a rotating shaft 5.1 is inserted into the center hole of the planetary gear 5, and the two ends of the rotating shaft 5.1 are respectively connected to the upper frame 4.1 and the lower frame 4.2. A needle roller 5.2 is arranged between the outer wall surface of the rotating shaft 5.1 and the side wall surface of the center hole of the planetary gear 5. The needle roller 5.2 is arranged in a circumferential manner along the side wall surface of the planetary gear 5. It should be noted that the arrangement of the needle roller 5.2 reduces friction and improves efficiency, so that the planetary gear 5 runs more smoothly and increases its service life.

[0050] In some embodiments, as Figure 6 - Figure 8 shown, a second bearing 11 is provided between the gear shaft 3 and the upper frame 4.1. A retaining edge 3.3 is provided axially on the gear shaft 3. The second bearing 11 is provided above the retaining edge 3.3. It should be noted that the setting of the baffle prevents the second bearing 11 from moving downward and improves the working stability of the device.

[0051] In some embodiments, as Figure 9 - Figure 11 shown, a third bearing 13 is provided between the output flange 2.1 and the lower frame 4.2, and a fourth bearing 14 is provided between the gear shaft 3 and the lower frame 4.2.

[0052] In some embodiments, as Figure 4 shown, the ring gear flange 2.2 protrudes downward with a first sealing block 2.1.1, and the output flange 2.1 protrudes upward with a second sealing block 2.2.1. The outer wall surface of the first sealing block 2.1.1 abuts against the inner wall surface of the output ring gear 2.3. A first sealing groove 2.1.2 is provided on the connecting wall surface between the first sealing block 2.1.1 and the output ring gear 2.3. A sealing O-ring 12 is provided in the first sealing groove 2.1.2. The outer wall surface of the second sealing block 2.2.1 abuts against the inner wall surface of the output ring gear 2.3. A second sealing groove 2.2.2 is provided on the connecting wall surface between the second sealing block 2.2.1 and the output ring gear 2.3. A sealing O-ring 12 is provided in the second sealing groove 2.2.2. It should be noted that to further enhance the sealing performance of the device, the first sealing block 2.1.1 or the second sealing block 2.2.1 cooperates with the sealing O-ring 12 for double sealing, and the sealing performance is good.

[0053] In some embodiments, as Figure 3 shown, the helix angles of the lower drive ring gear 3.2, the planetary gear 5, and the output ring gear 2.3 are 15°, the tooth widths are all 15 mm, the number of teeth of the lower drive ring gear 3.2 is 11, the number of teeth of the planetary gear 5 is 49, and the number of teeth of the output ring gear 2.3 is 109. It should be noted that the gear overlap is good, and the noise is further reduced.

[0054] It should be pointed out that the normal module of the lower drive ring gear 3.2, the planetary gear 5, and the output ring gear 2.3 is 1.21 mm, and the pressure angle is found to be 18.5°.

[0055] In some embodiments, as Figure 4 shown, the outer surface of the housing 2 is painted. It should be noted that the anti-corrosion performance is good, providing additional physical protection, reducing the influence of the external environment on the housing 2, and increasing the service life of the reducer.

[0056] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0057] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An oxygen pump reducer, comprising a motor (1) and a planetary gear reducer mounted on the output end of the motor (1), characterized in that: The planetary gear reducer comprises a housing (2), a gear shaft (3) arranged inside the housing (2), a planet carrier (4) and at least three planetary gears (5), wherein the planetary gears (5) are installed in the planet carrier (4), the planetary gears (5) are arranged in the form of helical teeth, the housing (2) comprises an output gear ring (2.3), the three planetary gears (5) are meshed in the output gear ring (2.3), the output shaft (1.1) of the motor (1) is connected to the gear shaft (3), the three planetary gears (5) are arranged around the gear shaft (3), the three planetary gears (5) are meshed with the gear shaft (3), and the three planetary gears (5) are meshed with the gear shaft (3). The lower transmission gear ring (3.2) of the wheel shaft (3) is meshed, the motor (1) drives the gear shaft (3) to rotate, and synchronously drives the planetary gear (5) to rotate in the output gear ring (2.3), the planetary frame (4) comprises an upper frame (4.1) and a lower frame (4.2), the planetary gear (5) is rotatably mounted between the upper frame (4.1) and the lower frame (4.2), the upper end outer wall surface of the upper frame (4.1) is sealed with the housing (2) through a first oil seal (6), and the upper end inner wall surface of the upper frame (4.1) is sealed with the gear shaft (3) through a second oil seal (7).

2. The oxygen pump reducer according to claim 1, characterized in that: A cover plate (8) is provided between the housing (2) and the motor (1), a water retaining portion (8.1) is provided on the lower end surface of the cover plate (8), and the inner wall surface of the water retaining portion (8.1) abuts against the outer wall surface of the upper end of the housing (2).

3. The oxygen pump reducer according to claim 1, characterized in that: The output shaft (1.1) of the motor (1) is connected to the gear shaft (3) through a connecting piece (9); an upper connecting gear ring (9.1) and a lower connecting gear ring (9.2) are respectively provided at both ends of the inner hole of the connecting piece (9); the output shaft (1.1) is inserted into the inner hole at the upper end of the connecting piece (9), and the output shaft (1.1) is meshed with the upper connecting gear ring (9.1); the gear shaft (3) is inserted into the inner hole at the lower end of the connecting piece (9); The upper section of the gear shaft (3) is provided with an upper transmission gear ring (3.1), the upper transmission gear ring (3.1) is meshed with the lower connection gear ring (9.2), the upper end of the upper frame (4.1) comprises a receiving groove (4.1.1), the second oil seal (7) is installed at the bottom end of the receiving groove (4.1.1), a cavity is formed between the wall surface of the receiving groove (4.1.1) and the connecting member (9), and an oil hole (9.3) is provided on the side wall of the connecting member (9).

4. The oxygen pump reducer according to claim 1, characterized in that: The housing (2) comprises an output flange (2.1) and a gear ring flange (2.2); the gear ring flange (2.2), the output gear ring (2.3) and the output flange (2.1) are connected in sequence from top to bottom by bolts.

5. The oxygen pump reducer according to claim 2, characterized in that: The connection between the upper frame (4.1) and the cover plate (8) is treated by applying a sealant, and the upper frame (4.1) and the cover plate (8) are connected by bolts. A first bearing (10) is provided between the upper frame (4.1) and the housing (2), and the first bearing (10) is provided below the first oil seal (6). The connection between the upper frame (4.1) and the first bearing (10) is treated by applying a sealant.

6. The oxygen pump reducer according to claim 1, characterized in that: A rotating shaft (5.1) is inserted into the center hole of the planetary gear (5), and the two ends of the rotating shaft (5.1) are respectively connected to the upper frame (4.1) and the lower frame (4.2). A roller needle (5.2) is provided between the outer wall surface of the rotating shaft (5.1) and the side wall surface of the center hole of the planetary gear (5), and the roller needle (5.2) is arranged in a circumferential manner along the side wall surface of the planetary gear (5).

7. The oxygen pump reducer according to claim 1, characterized in that: A second bearing (11) is provided between the gear shaft (3) and the upper frame (4.1), a retaining edge (3.3) is axially provided on the gear shaft (3), and the second bearing (11) is arranged above the retaining edge (3.3).

8. The oxygen pump reducer according to claim 4, characterized in that: The gear ring flange (2.2) protrudes downwards to form a first sealing block (2.1.1), and the output flange (2.1) protrudes upwards to form a second sealing block (2.2.1); the outer wall surface of the first sealing block (2.1.1) abuts against the inner wall surface of the output gear ring (2.3); the connecting wall surface of the first sealing block (2.1.1) and the output gear ring (2.3) is provided with a first sealing groove (2.1.2); a sealing O-ring (12) is provided in the first sealing groove (2.1.2); the outer wall surface of the second sealing block (2.2.1) abuts against the inner wall surface of the output gear ring (2.3); the connecting wall surface of the second sealing block (2.2.1) and the output gear ring (2.3) is provided with a second sealing groove (2.2.2); a sealing O-ring (12) is provided in the second sealing groove (2.2.2).

9. The oxygen pump reducer according to claim 4, characterized in that: The helix angle of the lower transmission gear ring (3.2), the planetary gear (5) and the output gear ring (2.3) is 15°, the tooth width is 15 mm, the number of teeth of the lower transmission gear ring (3.2) is 11, the number of teeth of the planetary gear (5) is 49, and the number of teeth of the output gear ring (2.3) is 109.

10. The oxygen pump reducer according to claim 1, characterized in that: The outer surface of the shell (2) is spray-painted.

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