A geared motor and a refrigeration appliance

Abstract

This invention discloses a geared motor and a refrigeration appliance. The geared motor includes a motor body, a gearbox assembly, and a drive plate. The drive plate is electrically connected to the motor body. The gearbox assembly includes a gearbox body and a gear set, where at least some gears have helical teeth. The motor body includes a motor bracket located outside the gearbox body. The output shaft of the motor body passes through the motor bracket and connects to the gear set inside the gearbox assembly. This invention fundamentally solves the problem of motor installation concentricity deviation, eliminates abnormal vibration and noise caused by eccentricity, and thus significantly reduces operating noise while maintaining good concentricity.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a geared motor and a refrigeration appliance. Background Technology

[0002] A geared motor is a transmission device that converts the high speed of an electric motor into a low speed and high torque output through a gear reduction device. It is widely used in refrigeration appliances such as household ice makers, slush machines, and ice cream machines.

[0003] In existing technologies, the motor body of the geared motor used in refrigeration appliances is usually integrated with the motor bracket and the gearbox body. This integrated design structure easily leads to the center of the motor output shaft not being concentric with the center of the bearing position on the gearbox, resulting in poor concentricity. The motor output shaft becomes eccentric during operation, which in turn causes the first-stage gear to wobble during operation, leading to a series of problems such as vibration, increased noise, and increased operating current during gear transmission. This seriously affects the operating performance and service life of the motor and increases the energy consumption of the motor. Furthermore, the gear set in the gearbox assembly generally adopts a spur gear transmission structure. During the meshing transmission process, the tooth surface contact of the spur gear is simultaneous and instantaneous along the entire tooth width, resulting in a large meshing impact, which causes the motor to generate greater vibration and noise during operation. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a geared motor and a refrigeration appliance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, the present invention provides a geared motor, including a motor body, a gearbox assembly and a drive plate, wherein the drive plate is electrically connected to the motor body, the gearbox assembly includes a gearbox body and a gear set, wherein at least some of the gears in the gear set have helical teeth, the motor body includes a motor bracket, the motor bracket is disposed outside the gearbox body, and the output shaft of the motor body passes through the motor bracket and is connected to the gear set inside the gearbox assembly.

[0006] Furthermore, the upper surface of the gearbox body is provided with a mounting groove, and the center of the mounting groove is provided with a central through hole. The output shaft of the motor body can pass through the central through hole. The motor bracket is provided with a first embedding part and a second embedding part. The second embedding part extends downward from the bottom of the first embedding part. The first embedding part is embedded in the mounting groove, and the second embedding part is embedded in the central through hole.

[0007] Furthermore, the first embedding part includes a plurality of connecting ears arranged circumferentially, and the connecting ears are provided with fixing holes for fixed connection with the gearbox body.

[0008] Furthermore, the gear set includes at least one primary gear, at least one final gear, and multiple intermediate gears, wherein the teeth of the primary gear and some of the intermediate gears are helical teeth.

[0009] Furthermore, there are two intermediate gears. The primary gear is connected to the output shaft of the motor body, and the two intermediate gears are located between the primary gear and the final gear.

[0010] Furthermore, both intermediate gears include an upper tooth portion and a lower tooth portion, and the outer diameter of the upper tooth portion is smaller than the outer diameter of the lower tooth portion. The upper tooth portion is made of metal material, and the lower tooth portion is made of plastic material. The upper tooth portion and the lower tooth portion of the intermediate gear closer to the primary gear are both right-hand helical teeth, while the upper tooth portion of the intermediate gear farther from the primary gear is a straight tooth, and the lower tooth portion is a left-hand helical tooth.

[0011] Furthermore, the teeth of the primary gear are left-handed helical teeth, and the teeth of the final gear are straight teeth.

[0012] Furthermore, the lower tooth of the intermediate gear near the primary gear meshes with the primary gear, the upper tooth of the intermediate gear near the primary gear meshes with the lower tooth of the intermediate gear away from the primary gear, and the upper tooth of the intermediate gear away from the primary gear meshes with the final gear.

[0013] Furthermore, the drive plate is located outside the main body of the gearbox, and the drive plate is connected to the motor body via a wire.

[0014] On the other hand, the present invention also provides a refrigeration appliance, including the aforementioned geared motor.

[0015] The beneficial effects of this invention compared with the prior art are as follows: by designing at least some of the gear teeth in the gear set as helical teeth, the gear meshing process changes from instantaneous full-tooth-width contact to gradual engagement, which effectively reduces transmission impact and operating noise, and improves the load-bearing capacity and service life of the gears. At the same time, by connecting the motor body and the gearbox body separately through the motor bracket, the problem of motor installation concentricity deviation is fundamentally solved, and abnormal vibration and noise caused by eccentricity are eliminated, thereby achieving a significant reduction in operating noise while ensuring good concentricity.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a geared motor provided for a specific embodiment of the present invention; Figure 2 An exploded view of a geared motor provided for a specific embodiment of the present invention; Figure 3 A schematic diagram of the installation of a motor bracket provided in a specific embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of the main body of the gearbox provided in a specific embodiment of the present invention; Figure 5 A schematic diagram of the structure of the motor bracket provided in a specific embodiment of the present invention; Figure 6 A schematic diagram of the gear assembly provided for a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the gear set provided for a specific embodiment of the present invention.

[0019] Figure Labels 1. Motor body; 11. Motor bracket; 111. First embedded part; 1111. Connecting ear; 11111. Fixing hole; 112. Second embedded part; 12. Output shaft of motor body; 2. Gearbox assembly; 21. Gearbox body; 211. Mounting slot; 2111. Central through hole; 22. Gear set; 221. Primary gear; 222. Intermediate gear; 2221. Upper tooth; 2222. Lower tooth; 223. Final stage gear; 3. Drive plate; 4. Wire. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] like Figures 1 to 7 As shown, this embodiment of the invention provides a geared motor, including a motor body 1, a gearbox assembly 2, and a drive plate 3. The drive plate 3 is electrically connected to the motor body 1 and provides drive control signals to the motor body 1 to control the motor body 1's start-stop, speed, and direction of rotation, among other operating parameters. The gearbox assembly 2 includes a gearbox body 21 and a gear set 22 disposed inside the gearbox body 21. The gearbox body 21 encapsulates, supports, and protects the gear set 22. The gearbox body 21 is integrally molded from high-strength engineering plastic, balancing structural strength and lightweight requirements.

[0027] The gear set 22 is the core transmission component of the geared motor. At least some of the gears are designed with helical teeth. During gear meshing, because the tooth surface contact of the helical teeth is point contact, the friction in the meshing area is small, resulting in higher efficiency of the helical gear transmission. Furthermore, the impact and vibration generated during transmission are smaller, leading to better smoothness of the helical gear transmission. In addition, the tooth surface contact stress of the helical teeth is larger, thus its load-bearing capacity is stronger, making it suitable for heavy-load applications.

[0028] The connection between the motor body 1 and the gearbox assembly 2 adopts a split connection design. Specifically, the motor body 1 is provided with a motor bracket 11, which is located outside the gearbox body 21. The output shaft 12 of the motor body passes through the motor bracket 11 and extends into the gearbox assembly 2 to connect with the gear set 22, thereby transmitting the rotational power of the motor body 1 to the gear set 22. Unlike the existing technology where the motor body 1 and the gearbox assembly 2 are directly and rigidly connected, the split connection method of this invention achieves precise positioning with the help of the motor bracket 11, effectively ensuring the concentricity of the output shaft of the motor body 1 and the gear shaft hole inside the gearbox assembly 2. This fundamentally eliminates problems such as abnormal vibration, increased operating noise, and increased operating current caused by concentricity deviation, significantly improving the operating stability and service life of the motor body 1, and reducing the overall energy consumption of the machine.

[0029] In one embodiment, the motor bracket 11 is made of aluminum alloy. Aluminum alloy has the advantages of high processing precision and good dimensional stability, which can further improve the positioning accuracy of the motor bracket 11, thereby better ensuring the coaxiality of the output shaft of the motor body 1 and the gearbox assembly 2, and further reducing operating noise and vibration.

[0030] exist Figure 4 In the embodiment shown, the upper surface of the gearbox body 21 of the gearbox assembly 2 is provided with a mounting groove 211. The mounting groove 211 is a downwardly recessed groove-shaped structure. A central through hole 2111 is provided at the center of the mounting groove 211. The central through hole 2111 extends through the gearbox body 21 in the vertical direction. The output shaft 12 of the motor body can pass through the central through hole 2111 downward and extend into the gearbox assembly 2 to connect with the gear set 22.

[0031] The motor bracket 11 has a first embedding part 111 and a second embedding part 112. The second embedding part 112 extends downward from the bottom of the first embedding part 111, forming a stepped integral structure. During installation, the first embedding part 111 is embedded in the mounting groove 211 on the upper surface of the gearbox body 21, and the second embedding part 112 is embedded in the central through hole 2111 at the center of the mounting groove 211, thereby achieving precise fitting and positioning between the motor bracket 11 and the gearbox body 21. In this way, the mounting groove 211 provides circumferential restraint to the first embedding part 111, and the central through hole 2111 provides radial restraint to the second embedding part 112. The two-stage embedding and positioning work together to effectively eliminate the positional deviation of the motor bracket 11 relative to the gearbox body 21 in the radial direction, thereby precisely controlling the coaxiality between the output shaft of the motor body 1 and the gear set 22 of the gearbox assembly 2, avoiding eccentric operation of the output shaft due to assembly errors, and thus effectively reducing vibration and noise during motor operation and improving the reliability of motor operation.

[0032] In one embodiment, both the mounting groove 211 and the central through hole 2111 can be designed with a circular cross-section. The first embedding part 111 and the second embedding part 112 are also designed with a circular cross-section that matches the mounting groove 211 and the central through hole 2111 to achieve a more precise concentric positioning effect. In addition, a precision fit tolerance can be provided between the inner wall of the mounting groove 211 and the central through hole 2111 and the outer wall of the first embedding part 111 and the second embedding part 112.

[0033] exist Figure 5 In the embodiment shown, the first embedding part 111 includes a plurality of connecting ears 1111 arranged circumferentially. Each connecting ear 1111 is evenly distributed along the circumference of the first embedding part 111. Each connecting ear 1111 is provided with a fixing hole 11111. The fixing hole 11111 is used to fix the motor bracket 11 to the gearbox body 21 by fasteners (such as screws, bolts, etc.).

[0034] The design of multiple connecting lugs 1111 spaced circumferentially creates a gap between each connecting lug 1111, which can reduce the overall weight of the motor bracket 11 without affecting the structural strength, thus facilitating lightweight design. On the other hand, the multi-point circumferential uniform fixing method can make the connection between the motor bracket 11 and the gearbox body 21 more uniformly stressed, avoiding warping or loosening of the motor bracket 11 due to eccentric stress, and further ensuring the concentricity stability of the output shaft of the motor body 1.

[0035] The number of connecting ears 1111 can be set to three, four or more according to actual assembly requirements. Each connecting ear 1111 is evenly distributed along the circumference to achieve optimal force balance. The fixing hole 11111 can be designed as a countersunk hole so that the fastener does not protrude above the upper surface of the connecting ear 1111 after tightening, preventing the fastener head from interfering with the bottom surface of the motor body 1.

[0036] In some embodiments, the gear set 22 includes at least one primary gear 221, at least one final gear 223, and a plurality of intermediate gears 222. The primary gear 221, the plurality of intermediate gears 222, and the final gear 223 sequentially form a complete reduction gear transmission chain. The output shaft 12 of the motor body is connected to the primary gear 221. The high speed output by the motor is transmitted to the intermediate gears 222 via the primary gear 221. The intermediate gears 222 further transmit the power to the final gear 223, and the final gear 223 outputs the final low speed and high torque.

[0037] Regarding the helical gear distribution, the primary gear 221 and part of the intermediate gears 222 are designed with helical teeth. The primary gear 221 is designed with helical teeth because it is directly connected to the motor output shaft, operates at the highest speed, and has the highest gear meshing frequency. Introducing helical teeth at this location most effectively improves transmission smoothness during high-speed meshing and reduces high-frequency noise. Part of the intermediate gears 222 also employs a helical tooth design, further extending and enhancing the low-noise effect in the transmission chain, resulting in a smoother reduction transmission process and lower noise overall.

[0038] exist Figure 7 In the embodiment shown, the final stage gear 223 adopts a spur gear design. Spur gears are easy to process and have small axial force under low speed and high torque conditions, which matches the working characteristics of the final stage gear 223 and also helps to reduce the overall production cost.

[0039] exist Figure 7In the illustrated embodiment, there are two intermediate gears 222. The primary gear 221 is connected to the output shaft 12 of the motor body. The two intermediate gears 222 are sequentially positioned between the primary gear 221 and the final gear 223, thus forming a four-stage transmission chain consisting of the primary gear 221, the first intermediate gear 222, the second intermediate gear 222, and the final gear 223. By setting two intermediate gears 222, a larger overall reduction ratio can be achieved between the motor output shaft speed and the output speed of the final gear 223, meeting the requirements of refrigeration appliances for low-speed, high-torque output. At the same time, distributing a larger reduction ratio across multiple transmission stages makes the speed ratio of each stage relatively reasonable, effectively controlling the force on the tooth surfaces of each gear and extending the service life of the gears.

[0040] Inside the gearbox assembly 2, each gear shaft is provided with a bearing seat or shaft hole for corresponding support, so as to ensure the stability of the axis position of each gear during operation and prevent the gear axis from shifting under high-speed rotation or high load conditions, which would affect meshing accuracy and transmission efficiency.

[0041] In some embodiments, the number of intermediate gears 222 may also be set to one or three or more according to the target reduction ratio requirement, so as to adapt to the different requirements of different specifications of refrigeration appliances for output speed and torque.

[0042] exist Figure 7 In the embodiment shown, both intermediate gears 222 adopt a compound gear structure, that is, each intermediate gear 222 includes an upper tooth portion 2221 and a lower tooth portion 2222. The upper tooth portion 2221 and the lower tooth portion 2222 are coaxially integrally formed, and the outer diameter of the upper tooth portion 2221 is smaller than the outer diameter of the lower tooth portion 2222. This forms a stepped compound gear form, which realizes the simultaneous reception and transmission of power on the same gear shaft. This is beneficial to reduce the overall volume of the gearbox assembly 2 and improve the compactness of the transmission system. Meanwhile, the upper tooth 2221 is made of metal, and the lower tooth 2222 is made of plastic. In the specific manufacturing process, the upper tooth 2221 can be injection molded into the plastic lower tooth 2222 using powder metallurgy material. The purpose of using metal for the upper tooth 2221 is that the center hole of the upper tooth 2221 is prone to wear when it rotates with the upper shaft of the gearbox. Using metal can ensure that the wear of the center hole is small, avoiding the problem of horizontal swing caused by large gaps due to large wear of the center hole during the rotation of the upper tooth 2221, which would cause large transmission noise.

[0043] For the intermediate gear 222 located near the primary gear 221, both its upper tooth portion 2221 and lower tooth portion 2222 are designed as right-hand helical teeth. The lower tooth portion 2222 of the intermediate gear 222 meshes with the primary gear 221, receiving the high-speed input from the primary gear 221. The lower tooth portion 2222 is helical and its helical direction matches that of the primary gear 221, ensuring the smoothness of the high-speed stage transmission. The upper tooth portion 2221 of the intermediate gear 222 meshes with the lower tooth portion 2222 of the intermediate gear 222 located away from the primary gear 221, realizing the power transmission of the intermediate stage.

[0044] For the intermediate gear 222 which is far from the primary gear 221, its lower tooth 2222 is designed as a left-handed helical tooth, which meshes with the upper tooth 2221 of the intermediate gear 222 which is close to the primary gear 221; its upper tooth 2221 is designed as a straight tooth, which meshes with the final gear 223 to complete the final stage of speed reduction transmission.

[0045] The aforementioned helical gear design ensures the smooth transmission of each meshing gear pair. By reasonably matching the helix angle direction between adjacent gears, the axial component forces generated by the meshing helical gear pairs cancel each other out or weaken on the same shaft, thereby effectively reducing the axial load on each gear shaft, reducing the axial force of the bearing, and further extending the overall service life of the gear set 22.

[0046] The helix angle of the helical gear can be adjusted within a reasonable range according to transmission efficiency, load requirements, and noise control objectives.

[0047] exist Figure 7 In the embodiment shown, the teeth of the primary gear 221 are left-handed helical teeth, and the teeth of the final gear 223 are straight teeth.

[0048] Specifically, the primary gear 221 adopts a left-handed helical tooth, which meshes with the lower tooth 2222 (right-handed helical tooth) of the intermediate gear 222 which is close to the primary gear 221. The two helical directions are opposite, which conforms to the configuration law of the helix angle direction of a pair of meshing helical gears. This ensures that the tooth surfaces of the two gears can form a correct progressive contact during the meshing process, and achieve smooth transmission.

[0049] The final stage gear 223 adopts a spur gear design. Spur gears have mature processing technology and low production costs. In the low-speed output stage of the final stage, the gear meshing frequency is low and the noise contribution is relatively limited. Using spur gears can reduce manufacturing costs and effectively avoid the problem of excessive additional load on bearings and housings due to excessive axial force under low-speed, high-torque conditions.

[0050] By using a combination of helical gears for the primary gear 221 and spur gears for the final gear 223, the smooth transmission advantage of helical gears is fully utilized while also taking into account process feasibility and cost control.

[0051] The power transmission path of the reduction gear chain is as follows: The output shaft 12 of the motor body rotates, driving the primary gear 221 connected to it to rotate. The helical teeth of the primary gear 221 mesh with the lower helical teeth 2222 of the intermediate gear 222 which is close to the primary gear 221, transmitting power to the intermediate gear 222 to achieve the first stage of reduction. The upper teeth 2221 of the intermediate gear 222 mesh with the lower teeth 2222 of the intermediate gear 222 which is far from the primary gear 221, transmitting power to the latter to achieve the second stage of reduction. The upper teeth 2221 (spur teeth) of the intermediate gear 222 which is far from the primary gear 221 mesh with the final gear 223, transmitting power to the final gear 223 to achieve the third stage of reduction. The final gear 223 outputs the final low speed and high torque.

[0052] Through the aforementioned three-stage sequential meshing transmission chain design, the reduction ratios of each stage are superimposed, ultimately achieving a high overall reduction ratio output. Simultaneously, the helical gear configuration of each meshing gear pair is rationally designed. The high-speed transmission stages (between the primary and first intermediate gear 222, and between the first and second intermediate gears 222) all employ helical gear meshing, ensuring smooth transmission and low noise during high-frequency meshing. The low-speed output stage (between the upper tooth 2221 of the second intermediate gear 222 and the final stage gear 223) uses spur gear meshing, reducing process complexity and production costs, achieving a good balance between performance and cost overall.

[0053] exist Figure 1 In the embodiment shown, the drive plate 3 is located at the bottom of the gearbox body 21. The drive plate 3 and the motor body 1 are electrically connected by a wire 4. The length of the wire 4 should meet the actual installation distance requirements between the drive plate 3 and the motor body 1, and an appropriate margin should be reserved when arranging the wire 4 to avoid the wire 4 being pulled and damaged by vibration during motor operation.

[0054] By independently placing the drive board 3 outside the gearbox body 21 and connecting it to the motor body 1 via the wire 4, the drive board 3 is kept away from the heat source and magnetic field interference area of ​​the motor, providing a more stable working environment for the drive board 3, effectively reducing the operating temperature of the driver and the intensity of electromagnetic interference, greatly extending the service life of the driver, and significantly reducing the overall failure rate.

[0055] In one embodiment, the drive board 3 can be installed in a separate protective housing. The protective housing is made of a material with certain electromagnetic shielding capabilities and is equipped with a heat dissipation structure to further improve the reliability of the drive board 3's operating environment. The wire 4 can be a wire with a high-temperature resistant insulation layer to adapt to possible local high-temperature environments.

[0056] This invention also provides a refrigeration appliance, which includes the aforementioned geared motor. Refrigeration appliances include, but are not limited to, household ice makers, slush machines, ice cream machines, and other household appliances that require mechanical stirring, crushing, or conveying of frozen or refrigerated materials.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A geared motor, characterized in that, The device includes a motor body, a gearbox assembly, and a drive plate. The drive plate is electrically connected to the motor body. The gearbox assembly includes a gearbox body and a gear set. At least some of the gears in the gear set have helical teeth. The motor body includes a motor bracket, which is located outside the gearbox body. The output shaft of the motor body passes through the motor bracket and connects to the gear set inside the gearbox assembly.

2. The geared motor according to claim 1, characterized in that, The upper surface of the gearbox body is provided with a mounting groove, and the center of the mounting groove is provided with a central through hole. The output shaft of the motor body can pass through the central through hole. The motor bracket is provided with a first embedding part and a second embedding part. The second embedding part extends downward from the bottom of the first embedding part. The first embedding part is embedded in the mounting groove, and the second embedding part is embedded in the central through hole.

3. A geared motor according to claim 2, characterized in that, The first embedded part includes a plurality of connecting ears arranged circumferentially, and the connecting ears are provided with fixing holes for fixed connection with the gearbox body.

4. A geared motor according to claim 1, characterized in that, The gear set includes at least one primary gear, at least one final gear, and multiple intermediate gears, wherein the teeth of the primary gear and some of the intermediate gears are helical teeth.

5. A geared motor according to claim 4, characterized in that, There are two intermediate gears. The primary gear is connected to the output shaft of the motor body, and the two intermediate gears are located between the primary gear and the final gear.

6. A geared motor according to claim 5, characterized in that, Both intermediate gears include an upper tooth portion and a lower tooth portion, and the outer diameter of the upper tooth portion is smaller than the outer diameter of the lower tooth portion. The upper tooth portion is made of metal material, and the lower tooth portion is made of plastic material. The upper tooth portion and the lower tooth portion of the intermediate gear closer to the primary gear are both right-hand helical teeth, while the upper tooth portion of the intermediate gear farther from the primary gear is a straight tooth, and the lower tooth portion is a left-hand helical tooth.

7. A geared motor according to claim 6, characterized in that, The primary gear has left-handed helical teeth, and the final gear has straight teeth.

8. A geared motor according to claim 7, characterized in that, The lower tooth of the intermediate gear near the primary gear meshes with the primary gear, the upper tooth of the intermediate gear near the primary gear meshes with the lower tooth of the intermediate gear away from the primary gear, and the upper tooth of the intermediate gear away from the primary gear meshes with the final gear.

9. A geared motor according to any one of claims 1-8, characterized in that, The drive plate is located at the bottom of the gearbox body, and the drive plate is connected to the motor body by a wire.

10. A refrigeration appliance, characterized in that, Includes the geared motor as described in any one of claims 1-9.

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