A mute waterproof long shaft connecting type mower hub reduction motor

Abstract

The utility model relates to hub reduction motor technical field, especially is related to a long axle connection type mower hub reduction motor of mute waterproof, including the casing, the planetary skeleton, planetary gear and motor are installed in the casing, the casing includes mutually fixed lid and the lower shell of upper casing, the lid surface between upper casing and lower shell is provided with the sealing ring, the shaft hole that penetrates its inside is set up in the upper end middle position department of upper casing, and the inside of shaft hole is formed with the step portion, the casing only adopts the lid design of two parts of upper casing and lower shell, compares the traditional many structure splicing casing, and the splicing surface number is greatly reduced, and the overall structure of casing is simplified. The sealing ring at the lid surface department of upper casing and lower shell can concentrate waterproof sealing, need not in multiple splicing surface design complex sealing structure, reduce sealing process difficulty, improve waterproof reliability, effectively avoid the water inlet failure under the outdoor humid environment.

Description

Technical Field

[0001] This utility model relates to the field of hub geared motor technology, and in particular to a silent and waterproof long-shaft connected hub geared motor for lawnmowers. Background Technology

[0002] In the power transmission system of a lawnmower, the hub geared motor is a core actuator. Its performance directly determines the lawnmower's operating efficiency, operational stability, and service life, playing a crucial role in the current development of intelligent and efficient lawnmower equipment. Currently, mainstream lawnmower hub geared motors on the market integrate complex transmission structures such as reduction gear sets, drive shafts, and braking mechanisms. The assembly space and installation paths of each component vary significantly. To meet the precise assembly requirements of internal components, the motor housing generally adopts a multi-structure splicing assembly design. This involves disassembling the housing into multiple independent structural components such as a front shell, middle shell, rear shell, end cover, and cylinder. After pre-assembling the corresponding internal components in each component, the entire assembly is achieved through bolt connections, snap-fit ​​connections, and other methods.

[0003] However, the aforementioned multi-structure spliced ​​shell design has revealed several unavoidable technical defects in practical applications: Firstly, given that lawnmowers mostly operate in damp environments such as outdoor lawns and green belts, the motor needs to have a high waterproof rating to prevent rainwater, dew, or lawn water from penetrating and causing malfunctions. The multi-structure spliced ​​shell design inevitably increases the number of splicing surfaces. To ensure waterproof performance, waterproof sealing structures such as sealing ring mounting grooves and sealant coatings need to be designed at each splicing surface. This not only significantly increases the structural complexity of the shell but also places higher demands on the precision of the sealing process, significantly increasing the risk of poor sealing. Secondly, the addition of waterproof sealing structures and the independent processing and molding of multiple spliced ​​components directly... This leads to a significant increase in the number of components in the motor, which not only increases the cost of raw materials but also the costs of processing, warehousing, and transportation of components. It also extends the assembly cycle, resulting in a significant increase in the production and manufacturing costs of the motor. Thirdly, during the assembly of multiple components, gaps are easily generated between the splicing surfaces due to factors such as processing precision and assembly process errors. When the motor is running, these gaps cause irregular vibrations and friction between the components. On the one hand, this significantly increases the operating noise of the motor, affecting the comfort of the working environment. On the other hand, it accelerates the wear rate of the components, especially the wear at the splicing point between the transmission components and the housing, directly shortening the service life of the motor.

[0004] In summary, the current mainstream lawnmower hub geared motors suffer from insufficient waterproofing, high manufacturing costs, loud operating noise, and short service life due to their multi-structure spliced ​​housing design. These issues make it difficult to meet the application requirements of modern intelligent lawnmower equipment for high performance, high stability, and low cost of core power components. There is an urgent need to optimize and improve the motor housing and related assembly structures to solve the above-mentioned technical defects. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] A silent and waterproof long-shaft connected lawnmower hub reduction motor includes a housing, in which a planetary frame, planetary gears and a motor are installed. The housing includes an upper shell and a lower shell that are fixedly covered to each other. A sealing ring is provided between the covering surfaces of the upper shell and the lower shell. A shaft hole is opened at the middle of the upper end of the upper shell and penetrates its interior. A stepped part is formed on the inner side of the shaft hole. The planetary frame includes an upper fixed seat and a lower fixed seat that are fixedly connected to each other. A long shaft is fixedly connected to the upper fixed seat. The long shaft extends out of the housing through a shaft hole. A first bearing is provided between the long shaft and the shaft hole, and the first bearing is constrained between the stepped portion and the upper fixed seat. A frame oil seal is also provided between the long shaft and the stepped portion. The long shaft is a hollow structure that runs through both ends. The upper fixed seat and the lower fixed seat are provided with a wire passage that communicates with the inside of the long shaft. The wire passage extends to the lower end of the lower fixed seat. A gear compartment with an open side is formed between the upper fixed seat and the lower fixed seat. Multiple planetary gears are provided, and the multiple planetary gears are rotatably connected in the gear compartment. The planetary gears are exposed on the outside of the planetary frame along the gear compartment. An annular gear ring that meshes with the planetary gears is provided on the inner side of the housing. The motor includes an inner stator, an outer rotor, and an output shaft. The inner stator is fixed at the lower end of the lower fixed base. The output shaft is connected to the inner stator bearing. The lower end of the output shaft is connected to the bottom bearing of the lower housing. The upper end of the output shaft extends into the gear compartment, and a sun tooth meshing between all planetary gears is provided at the upper end of the output shaft. The outer rotor is fixed on the output shaft, and the outer rotor is arranged around the inner stator.

[0007] Preferably, multiple vertical reinforcing ribs are formed around the outer sides of the upper and lower shells. The upper shell has countersunk holes that penetrate to the lower end on the reinforcing ribs, and the lower shell has threaded holes that mate with the countersunk holes on the reinforcing ribs. The upper and lower shells are connected and fixed by screws through the countersunk holes and threaded holes.

[0008] Preferably, the lower end of the reinforcing rib of the lower shell is embedded with a nut.

[0009] Preferably, the upper shell has an annular protrusion formed on its sealing surface, and the lower shell has an annular groove formed on its sealing surface. The annular protrusion and the annular groove are mated together, and the sealing ring is pressed between the annular protrusion and the annular groove.

[0010] Preferably, both the upper and lower fixed seats are circular plate structures. Multiple connecting columns are arranged around the lower fixed seat. The upper and lower fixed seats are fixedly connected by screws through the connecting columns, so that a gear compartment is formed between the upper and lower fixed seats through the connecting columns. The adjacent connecting columns are spaced apart to expose the planetary gears.

[0011] Preferably, a fixing slot is provided at the middle position of the upper fixing seat, and the long shaft is welded and fixed to the fixing slot. The wire passage includes a long groove opened at the upper end of the upper fixing seat and connected to the fixing slot, a first notch opened on one side of the upper fixing seat, and a second notch opened on one of the fixing seats and extending to the lower end of the lower fixing seat. The first notch is connected to the long groove, the second notch is located directly below the first notch, and a third notch is opened at the lower end of the long shaft and connected to the long groove.

[0012] Preferably, multiple axles are connected between the upper fixed seat and the lower fixed seat based on planetary gears, and a fourth bearing is connected to the axles. The planetary gears are rotatably connected to the axles through the fourth bearings.

[0013] Preferably, the inner stator has a winding frame and a circuit board. The circuit board is fixedly installed at the lower end of the lower fixed seat. The winding frame is formed at the middle position of the lower end of the lower fixed seat. A second bearing is provided on the inner side of the winding frame. The output shaft is connected to the inner stator bearing through the second bearing.

[0014] Preferably, a receiving groove is formed protruding at the middle position of the lower end of the lower shell, and a third bearing is installed in the receiving groove. The lower end of the output shaft is connected to the lower shell bearing through the third bearing.

[0015] Preferably, the housing is made of plastic material, the planetary gear is made of plastic material, the sun gear and the output shaft are integrally formed, the upper fixed seat is made of powder metallurgy material, and the lower fixed seat is made of aluminum alloy material.

[0016] Compared with the prior art, the beneficial effects of this utility model are: The housing adopts a two-part design with an upper and lower shell, which significantly reduces the number of splicing surfaces and simplifies the overall structure compared to traditional multi-structure splicing housings. The sealing rings at the mating surfaces of the upper and lower shells can achieve centralized waterproof sealing, eliminating the need for complex sealing structures on multiple splicing surfaces. This reduces the difficulty of the sealing process, improves waterproof reliability, and effectively avoids water ingress failures in humid outdoor environments. Furthermore, the reduction in the number of splicing parts directly reduces the cost and cycle time of parts processing, storage, and assembly, while also reducing errors that may arise from splicing multiple parts and improving the overall assembly accuracy of the motor.

[0017] The planetary carrier is fixedly connected to the upper and lower fixed seats, forming an open-sided gear compartment. This provides a stable mounting space for the planetary gears and allows the inner stator of the motor to be directly fixed via the lower fixed seat, creating an integrated assembly structure between the motor and the planetary transmission mechanism. This design simplifies the assembly of the planetary carrier, planetary gears, and motor, thus achieving structural simplification of the housing. Furthermore, the entire structure shortens the power transmission path between the motor output shaft and the planetary gears, reducing power loss.

[0018] The planetary gears are integrated into the gear compartment of the planetary frame, and together with the fixed connection between the motor stator and the lower fixed seat, the relative positional accuracy between the motor, the planetary transmission mechanism and the housing is higher, reducing the assembly clearance between components. At the same time, the long shaft is constrained between the stepped part of the upper housing shaft hole and the upper fixed seat through the first bearing, further improving the connection stability between the planetary frame and the housing. When the motor is running, the vibration and friction between components are reduced, which not only effectively reduces operating noise and improves the comfort of the working environment, but also slows down the wear rate of transmission components such as planetary gears and sun gears, which can effectively extend the overall service life of the motor.

[0019] The long shaft adopts a hollow structure and serves both as a fixing and wiring function. Its upper end is fixed to the lawnmower body to achieve overall motor positioning, while the internal hollow channel, together with the upper and lower fixing seats, provides a cable passage for the motor cable. This design eliminates the need for additional fixing brackets and external wiring structures, making the overall motor structure more organized. It also avoids the wear and tear or rainwater corrosion that may occur to exposed cables, thus improving the safety and reliability of the motor.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model; Figure 3 This is a cross-sectional view of the outer shell of this utility model; Figure 4 This is a structural schematic diagram of the planetary frame, planetary gears, and motor in their assembled state in this utility model; Figure 5 This is a utility model Figure 4 A schematic diagram of a split structure from one perspective; Figure 6 This is a utility model Figure 4 A schematic diagram of the split structure from another perspective.

[0023] The reference numerals and names in the figure are as follows: Housing 10, upper housing 11, lower housing 12, receiving groove 121, third bearing 122, sealing ring 13, shaft hole 14, stepped part 15, annular gear ring 16, reinforcing rib 17, countersunk hole 171, threaded hole 172, insert nut 173, annular convex strip 18, annular groove 19, planetary skeleton 20, upper fixed seat 21, lower fixed seat 22, long shaft 23, third notch 231, first bearing 24, skeleton oil seal 25, wire passage 26, long groove 261, first notch 262, second notch 263, connecting column 27, fixing slot 28, wheel axle 29, fourth bearing 291, planetary gear 30, motor 40, inner stator 41, winding frame 411, circuit board 412, second bearing 413, outer rotor 42, output shaft 43, sun gear 44. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Please see Figure 1-6In this embodiment of the utility model, a silent and waterproof long-shaft connected lawnmower hub reduction motor includes a housing 10. A planetary frame 20, a planetary gear 30 and a motor 40 are installed inside the housing 10. The housing 10 includes an upper shell 11 and a lower shell 12 that are fixedly covered to each other. A sealing ring 13 is provided between the covering surfaces of the upper shell 11 and the lower shell 12. A shaft hole 14 is provided at the middle of the upper end of the upper shell 11, and a stepped part 15 is formed on the inner side of the shaft hole 14. The planetary frame 20 includes an upper fixed seat 21 and a lower fixed seat 22 that are fixedly connected to each other. A long shaft 23 is fixedly connected to the upper fixed seat 21. The long shaft 23 extends out of the housing 10 along the shaft hole 14. A first bearing 24 is provided between the long shaft 23 and the shaft hole 14, and the first bearing 24 is constrained between the step portion 15 and the upper fixed seat 21. A frame oil seal 25 is also provided between the long shaft 23 and the step portion 15. The long shaft 23 is a hollow structure that passes through both ends. A wire passage 26 communicating with the inside of the long shaft 23 is provided inside the upper fixed seat 21 and the lower fixed seat 22. The wire passage 26 extends to the lower end of the lower fixed seat 22. A gear compartment with an open side is formed between the upper fixed seat 21 and the lower fixed seat 22. Multiple planetary gears 30 are provided. The multiple planetary gears 30 are rotatably connected in the gear compartment, and the planetary gears 30 protrude along the outside of the planetary frame 20. An annular gear ring 16 that meshes with the planetary gears 30 is provided on the inner side of the housing 10. The motor 40 includes an inner stator 41, an outer rotor 42, and an output shaft 43. The inner stator 41 is fixed to the lower end of the lower fixed base 22. The output shaft 43 is connected to the inner stator 41 by a bearing. The lower end of the output shaft 43 is connected to the bottom bearing of the lower housing 12. The upper end of the output shaft 43 extends into the gear compartment, and a sun tooth 44 that meshes between all the planetary gears 30 is provided at the upper end of the output shaft 43. The outer rotor is fixed on the output shaft 43, and the outer rotor 42 is arranged around the inner stator 41.

[0026] When the noise- and waterproof long shaft 23-connected lawnmower hub geared motor 40 is working, it is fixedly connected to the lawnmower hub through the housing 10. First, the whole structure is fixed through the hollow long shaft 23. The upper end of the long shaft 23 extends out from the shaft hole 14 of the upper shell 11 of the housing 10 and can be fixedly connected to the lawnmower body. At the same time, the motor 40 cable enters the hollow structure inside the long shaft 23 through the cable passage 26 at the lower end of the lower fixing seat 22, completing the hidden wiring and avoiding the cable exposure and damage. After the motor 40 starts, the inner stator 41, which is fixed to the lower end of the fixed base 22 of the planetary frame 20, is energized, driving the outer rotor 42 surrounding it to rotate. The outer rotor 42 then drives the output shaft 43, which is fixed to it, to rotate synchronously. The sun gear 44 at the upper end of the output shaft 43 rotates accordingly. Because the sun gear 44 meshes with multiple planetary gears 30 in the gear compartment of the planetary frame 20, and the planetary gears 30 mesh with the inner ring gear 16 of the housing 10, the sun gear 44 will drive the planetary gears 30 to rotate within the gear compartment. The meshing action of the planetary gears 30 with the inner ring gear 16 of the housing 10 will push the housing 10 to rotate as a whole. Since the housing 10 is directly connected to the lawnmower hub, the rotation of the housing 10 can provide power to the hub, realizing the lawnmower operation.

[0027] In the above technical solution, the housing 10 adopts only a two-part cover design of upper shell 11 and lower shell 12. Compared with the traditional multi-structure spliced ​​housing 10, the number of splicing surfaces is greatly reduced, simplifying the overall structure of the housing 10. The sealing ring 13 at the splicing surface of upper shell 11 and lower shell 12 can achieve waterproof sealing in one place, eliminating the need to design complex sealing structures on multiple splicing surfaces. This reduces the difficulty of the sealing process, improves waterproof reliability, and effectively avoids water ingress failures in outdoor humid environments. Moreover, the reduction in the number of splicing parts will directly reduce the cost and cycle of parts processing, storage, and assembly, while reducing the errors that may be caused by splicing multiple parts and improving the overall assembly accuracy of motor 40.

[0028] The planetary carrier 20 is fixedly connected to the lower fixed seat 22 via the upper fixed seat 21, forming an open-side gear compartment. This provides a stable mounting space for the planetary gears 30 and allows the inner stator 41 of the motor 40 to be directly fixed via the lower fixed seat 22, thus forming an integrated assembly structure between the motor 40 and the planetary transmission mechanism. This design simplifies the assembly of the planetary carrier 20, planetary gears 30, and motor 40, thereby achieving structural simplification of the housing 10. Furthermore, the entire structure shortens the power transmission path between the output shaft 43 of the motor 40 and the planetary gears 30, reducing power loss.

[0029] The planetary gear 30 is integrated into the gear compartment of the planetary frame 20. Together with the fixed connection between the stator 41 of the motor 40 and the lower fixed seat 22, the relative positional accuracy between the motor 40, the planetary transmission mechanism and the housing 10 is higher, and the assembly clearance between components is reduced. At the same time, the long shaft 23 is constrained between the stepped portion 15 of the shaft hole 14 of the upper housing 11 and the upper fixed seat 21 through the first bearing 24, which further improves the connection stability between the planetary frame 20 and the housing 10. When the motor 40 is running, the vibration and friction between components are reduced, which not only effectively reduces the operating noise and improves the comfort of the working environment, but also slows down the wear rate of transmission components such as the planetary gear 30 and the sun gear 44, which can effectively extend the overall service life of the motor 40.

[0030] The long shaft 23 adopts a hollow structure and serves as both a fixing and wiring function. Its upper end is fixed to the lawnmower body to achieve overall positioning of the motor 40. The internal hollow channel, together with the wiring channel 26 of the upper fixing seat 21 and the lower fixing seat 22, completes the concealed arrangement of the motor 40 cable. This design eliminates the need for additional fixing brackets and external wiring structures, making the overall structure of the motor 40 more regular, while avoiding the wear or rain erosion that may occur to exposed cables, thus improving the safety and reliability of the motor 40.

[0031] The housing 10 and planetary gear 30 are both made of plastic. Plastic is lightweight and has excellent shock absorption and noise reduction properties, which not only reduces the overall weight of the motor 40 to meet the lightweight requirements of lawnmowers, but also further weakens vibration transmission and friction noise during component operation, improving quietness. At the same time, plastic parts are easy to process and cost-effective, reducing production investment. The sun gear 44 and output shaft 43 are integrally molded, eliminating the assembly process and avoiding transmission errors and wear problems caused by assembly gaps. This significantly improves the stability and efficiency of power transmission and also reduces the number of parts to simplify production. Production process; the upper fixed seat 21 is made of powder metallurgy material. Powder metallurgy parts can be precisely molded into complex structures, which can meet the high-precision matching requirements of the upper fixed seat 21, the long shaft 23, and the planetary gear 30. Moreover, the material has high strength and good wear resistance, which can ensure the long-term stable operation of the planetary transmission mechanism; the lower fixed seat 22 is made of aluminum alloy material. Aluminum alloy has the characteristics of being lightweight and having high rigidity. It can support the stable fixation of the stator 41 inside the motor 40 without adding extra weight to the motor 40. At the same time, aluminum alloy has excellent heat dissipation performance, which can help dissipate heat during the operation of the motor 40 and avoid affecting the service life of the motor 40 due to overheating.

[0032] Please see Figure 1-3Based on the above technical solution, it is further proposed that multiple vertical reinforcing ribs 17 be formed around the outer sides of the upper shell 11 and the lower shell 12. A countersunk hole 171 penetrating the lower end is provided on the reinforcing rib 17 of the upper shell 11, and a threaded hole 172 engaging with the countersunk hole 171 is provided on the reinforcing rib 17 of the lower shell 12. The upper shell 11 and the lower shell 12 are connected and fixed with screws through the countersunk hole 171 and the threaded hole 172. The reinforcing ribs 17 can significantly improve the overall structural rigidity and deformation resistance of the shell 10, preventing damage to the shell 10 due to vibration and impact during motor 40 operation or outdoor work. Simultaneously, the corresponding engagement of the countersunk hole 171 and the threaded hole 172 on the reinforcing rib 17 enables precise alignment and secure screw connection between the upper shell 11 and the lower shell 12. The countersunk hole 171 design also avoids screw damage. The exposed wire head enhances safety during use; the reinforcing rib 17 of the lower shell 12 is embedded with a nut 173; the shell 10 is connected and fixed to the wheel hub of the lawnmower through the nut 173, ensuring a firm and reliable connection; the upper shell 11 has an annular protrusion 18 formed on its cover surface, and the lower shell 12 has an annular groove 19 on its cover surface. The annular protrusion 18 and the annular groove 19 are mated together, and the sealing ring 13 is pressed between the annular protrusion 18 and the annular groove 19; this can form precise positioning and compression constraint on the sealing ring 13, making the sealing ring 13 tightly pressed between the two, greatly improving the sealing reliability of the cover surface, effectively preventing rainwater and dust from entering the interior of the shell 10 from the joint, further adapting to the humid and dusty outdoor working environment, and ensuring the long-term stable operation of the motor 40.

[0033] Please see Figure 4-6 Based on the above technical solution, it is further proposed that both the upper fixed seat 21 and the lower fixed seat 22 are circular plate structures. Multiple connecting columns 27 are arranged around the lower fixed seat 22. The upper fixed seat 21 and the lower fixed seat 22 are fixedly connected by screws through the connecting columns 27, which simplifies the assembly operation of the two and allows the upper fixed seat 21 and the lower fixed seat 22 to form a gear compartment through the connecting columns 27. In addition, the adjacent two connecting columns 27 are spaced apart to allow the planetary gear 30 to be exposed, eliminating the need for additional processing of avoidance structures and reducing the processing complexity of the planetary frame 20.

[0034] A fixing slot 28 is provided in the middle of the upper fixing seat 21. The long shaft 23 is welded to the fixing slot 28 to ensure that the long shaft 23 is firmly connected and has high coaxiality, and to avoid vibration caused by the offset of the long shaft 23 during operation. The cable passage 26 includes a long groove 261 opened at the upper end of the upper fixing seat 21 and connected to the fixing slot 28, a first notch 262 opened on one side of the upper fixing seat 21, and a second notch 263 opened on one of the fixing seats and extending to the lower end of the lower fixing seat 22. The first notch 262 is connected to the long groove 261, and the second notch 263 is located directly below the first notch 262. A third notch 231 is opened at the lower end of the long shaft 23 and connected to the long groove 261. The cable passage 26 forms a regular hidden cable routing path, which not only facilitates cable installation, but also avoids damage to the cable from friction with the transmission components.

[0035] Multiple axles 29 are connected between the upper fixed seat 21 and the lower fixed seat 22 based on the planetary gear 30. A fourth bearing 291 is connected to the axle 29. The planetary gear 30 is rotatably connected to the axle 29 through the fourth bearing 291, ensuring smooth rotation and revolution of the planetary gear 30, reducing frictional resistance and wear during transmission, and further improving power transmission efficiency and the service life of the motor 40.

[0036] Please see Figure 5-6 Based on the above technical solution, it is further proposed that the inner stator 41 has a winding frame 411 and a circuit board 412. The circuit board 412 is fixedly installed at the lower end of the lower fixed base 22, which can form a close-range circuit connection with the inner stator 41 of the motor 40, reducing line loss and facilitating overall wiring, thereby improving the stability and maintenance convenience of the motor 40 circuit system. The winding frame 411 is formed at the middle position of the lower end of the lower fixed base 22, which can provide a regular winding and fixing space for the coil of the motor 40, avoiding the coil from loosening or shifting and affecting the performance of the motor 40. A second bearing 413 is provided on the inner side of the winding frame 411, and the output shaft 43 is connected to the bearing of the inner stator 41 through the second bearing 413, providing stable central support for the output shaft 43.

[0037] A receiving groove 121 is protruding at the middle of the lower end of the lower shell 12. A third bearing 122 is installed in the receiving groove 121. The lower end of the output shaft 43 is connected to the bearing of the lower shell 12 through the third bearing 122, thereby improving the coaxiality and stability of the output shaft 43 when it rotates.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A silent and waterproof long-shaft connected hub geared motor for lawnmowers, comprising a housing (10), wherein a planetary frame (20), planetary gears (30), and a motor (40) are installed within the housing (10), characterized in that, The housing (10) includes an upper shell (11) and a lower shell (12) that are fixedly covered to each other. A sealing ring (13) is provided between the covering surfaces of the upper shell (11) and the lower shell (12). A shaft hole (14) is provided at the middle of the upper end of the upper shell (11) and penetrates its interior. A stepped part (15) is formed on the inner side of the shaft hole (14). The planetary frame (20) includes an upper fixed seat (21) and a lower fixed seat (22) that are fixedly connected to each other. A long shaft (23) is fixedly connected to the upper fixed seat (21). The long shaft (23) extends out of the housing (10) along the shaft hole (14). A first bearing (24) is provided between the long shaft (23) and the shaft hole (14). The first bearing (24) is constrained between the step (15) and the upper fixed seat (21). A frame oil seal (25) is also provided between the long shaft (23) and the step (15). The long shaft (23) is a hollow structure that runs through both ends. A wire passage (26) that connects the inside of the long shaft (23) is provided inside the upper fixed seat (21) and the lower fixed seat (22). The wire passage (26) extends to the lower end of the lower fixed seat (22). A gear compartment with an open side is formed between the upper fixed seat (21) and the lower fixed seat (22). Multiple planetary gears (30) are provided. Multiple planetary gears (30) are rotatably connected in the gear compartment. The planetary gears (30) are exposed on the outside of the planetary frame (20) along the gear compartment. An annular gear ring (16) that meshes with the planetary gears (30) is provided on the inner side of the housing (10). The motor (40) includes an inner stator (41), an outer rotor (42) and an output shaft (43). The inner stator (41) is fixed at the lower end of the lower fixed base (22). The output shaft (43) is connected to the inner stator (41) by a bearing. The lower end of the output shaft (43) is connected to the bottom bearing of the lower housing (12). The upper end of the output shaft (43) extends into the gear compartment, and a sun tooth (44) meshing between all planetary gears (30) is provided at the upper end of the output shaft (43). The outer rotor is fixed on the output shaft (43), and the outer rotor (42) is arranged around the inner stator (41).

2. The silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 1, characterized in that, Multiple vertical reinforcing ribs (17) are formed around the outer side of the upper shell (11) and the lower shell (12). The reinforcing ribs (17) of the upper shell (11) have countersunk holes (171) that pass through the lower end. The reinforcing ribs (17) of the lower shell (12) have threaded holes (172) that mate with the countersunk holes (171). The upper shell (11) and the lower shell (12) are connected and fixed by screws through the countersunk holes (171) and the threaded holes (172).

3. The silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 2, characterized in that, The lower end of the reinforcing rib (17) of the lower shell (12) is fitted with a nut (173).

4. A silent, waterproof, long-shaft-connected lawnmower hub reduction motor according to any one of claims 1-3, characterized in that, An annular protrusion (18) is formed on the sealing surface of the upper shell (11), and an annular groove (19) is provided on the sealing surface of the lower shell (12). The annular protrusion (18) and the annular groove (19) are mated together, and the sealing ring (13) is pressed between the annular protrusion (18) and the annular groove (19).

5. A silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 1, characterized in that, Both the upper fixed seat (21) and the lower fixed seat (22) are circular plate structures. Multiple connecting columns (27) are arranged around the lower fixed seat (22). The upper fixed seat (21) and the lower fixed seat (22) are fixedly connected by screws through the connecting columns (27), so that the upper fixed seat (21) and the lower fixed seat (22) form a gear compartment through the connecting columns (27), and the adjacent two connecting columns (27) are spaced apart to allow the planetary gear (30) to be exposed.

6. A silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 5, characterized in that, A fixing slot (28) is provided at the middle position of the upper fixing seat (21). The long shaft (23) is welded and fixed to the fixing slot (28). The wire passage (26) includes a long groove (261) opened at the upper end of the upper fixing seat (21) and connected to the fixing slot (28), a first notch (262) opened on one side of the upper fixing seat (21), and a second notch (263) opened on one of the fixing seats and extending to the lower end of the lower fixing seat (22). The first notch (262) is connected to the long groove (261), and the second notch (263) is located directly below the first notch (262). A third notch (231) is opened at the lower end of the long shaft (23) and connected to the long groove (261).

7. A silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 1, characterized in that, Multiple axles (29) are connected between the upper fixed seat (21) and the lower fixed seat (22) based on the planetary gear (30), and a fourth bearing (291) is connected to the axle (29). The planetary gear (30) is rotatably connected to the axle (29) through the fourth bearing (291).

8. A silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 1, characterized in that, The inner stator (41) has a winding frame (411) and a circuit board (412). The circuit board (412) is fixedly installed at the lower end of the lower fixed seat (22). The winding frame (411) is formed at the middle position of the lower end of the lower fixed seat (22). A second bearing (413) is provided on the inner side of the winding frame (411). The output shaft (43) is connected to the inner stator (41) bearing through the second bearing (413).

9. A silent and waterproof long-shaft connected lawnmower hub reduction motor according to claim 1, characterized in that, A receiving groove (121) is protruding at the middle of the lower end of the lower shell (12). A third bearing (122) is installed in the receiving groove (121). The lower end of the output shaft (43) is connected to the bearing of the lower shell (12) through the third bearing (122).

10. A silent and waterproof long-shaft connected hub geared motor for lawnmowers according to claim 1, characterized in that, The housing (10) is made of plastic material, the planetary gear (30) is made of plastic material, the sun gear (44) and the output shaft (43) are integrally formed, the upper fixed seat (21) is made of powder metallurgy material, and the lower fixed seat (22) is made of aluminum alloy material.

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