A deceleration motor and a household appliance

Abstract

The utility model discloses in the household electrical appliances technical field, disclose a kind of reduction motor and household appliance.A kind of reduction motor, including gear box, motor and insulating connecting piece, the casing of gear box and the shell of motor are connected by insulating connecting piece to form fixed connection relationship, and insulating connecting piece separates casing and shell, so that casing and shell do not contact each other, effectively prevent the gear box electrification caused by motor electric leakage occurs.Electronic encoder of motor is located inside shell simultaneously, so that encoder can work normally in stable clean environment.

Description

Technical Field

[0001] This utility model belongs to the field of home appliance technology, specifically relating to a geared motor and a home appliance. Background Technology

[0002] Common household appliances such as air conditioners, washing machines, and some smart appliances generally require geared motors as their power source. The encoder on the geared motor provides precise rotor position feedback, which helps the motor to accurately position itself and improves the level of automation.

[0003] Some common geared motors used in household appliances consist of a motor and a gearbox. The housings of both the motor and gearbox are typically made of metal, and they are usually connected using metal fasteners to ensure a stable connection. This means that when the motor leaks current, electrical conduction inevitably occurs between the motor and the gearbox, posing a safety hazard to the user. Furthermore, the motor's encoder is externally mounted, making it susceptible to adverse effects from dust, oil fumes, or other impurities, resulting in poor encoder accuracy in detecting the motor rotor position. Ultimately, this prevents the entire appliance from functioning continuously and normally.

[0004] It should be noted that the information disclosed in the background section above is intended to enhance the understanding of the background of this invention, and therefore may contain information that does not constitute prior art. Utility Model Content

[0005] The purpose of this utility model is to disclose a geared motor and a household appliance that can protect the encoder in a clean and stable working environment and prevent the motor from leaking current into the gearbox, thus preventing potential safety hazards to the user.

[0006] To achieve the above objectives, this utility model discloses a geared motor, comprising: Gearbox, the gearbox including a housing; The motor includes a housing and an encoder, the encoder being disposed inside the housing, and the gearbox being fixedly connected to the motor; An insulating connector that separates the housing from the outer casing, preventing the housing from contacting the outer casing.

[0007] As an optional implementation, the gearbox further includes a first transmission part disposed within the housing, and a second transmission part disposed within the housing; the first transmission part and the second transmission part are connected in a transmission manner, wherein the first transmission part is made of an insulating material, and / or the second transmission part is made of an insulating material.

[0008] As an optional implementation, the insulating connector includes a first insulating sleeve and fasteners, the first insulating sleeve being fitted to the side of the housing near the outer shell, and / or the outer shell being fitted to the side of the housing near the housing; at least two fasteners passing through the first insulating sleeve, the housing, and adjacent partitions of the outer shell, and being threadedly connected to the housing and / or the outer shell.

[0009] As an optional implementation, the two ends of the fastener are located inside the housing and the outer shell, respectively, and are fixedly connected to the housing and the outer shell, respectively; at least one end of the fastener is fitted with a second insulating sleeve to isolate the fastener from the housing and / or to isolate the fastener from the outer shell.

[0010] As an optional implementation, the fastener includes a head and a rod, and the second insulating sleeve includes a head isolation groove and a rod isolation groove; the rod passes through the rod isolation groove, and the head is in contact with the bottom surface of the head isolation groove.

[0011] As an optional implementation, the housing or the outer shell is provided with a through hole corresponding to the position of the second insulating sleeve, and the through hole is provided with an annular slope that reduces the diameter of the through hole, and the outer wall of the second insulating sleeve is in contact with the annular slope.

[0012] As an optional implementation, the motor further includes a mounting component and an end cover, the mounting component being used to provide a mounting position for the encoder, and the end cover enclosing both the mounting component and the encoder within the housing.

[0013] As an optional implementation, the end cap has a through-hole corresponding to the position of the mounting component, the encoder wire passes through the through-hole and is electrically connected to an external circuit, and the through-hole and the wire are filled with sealant.

[0014] As an optional implementation, the motor includes a rotor, the encoder includes a circuit board and a magnetoresistive sensor, a magnetic ring is provided on the rotor corresponding to the position of the magnetoresistive sensor, and the magnetic ring is circumferentially fixed to the rotor; the magnetoresistive sensor is used to sense the magnetic signal of the magnetic ring, and the magnetoresistive sensor is electrically connected to the circuit board; the circuit board is fixedly connected to the mounting component.

[0015] Another aspect of this utility model discloses a household appliance, including a body and the aforementioned geared motor, wherein the geared motor is disposed on the body.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The housing isolates the encoder from the outside world, which can prevent external oil fumes and other impurities from having an adverse effect on the encoder, so that the encoder can work in a stable and clean environment.

[0017] (2) The housing and outer shell are fixedly connected by insulating connectors, so that the gearbox and motor form a stable connection relationship; the insulating connectors isolate the housing and outer shell, so that the housing and outer shell cannot be in direct contact, eliminating the conductive path of motor leakage to gearbox, and effectively reducing the possibility of electric shock to users due to motor leakage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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.

[0019] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a cross-sectional view of the entire utility model; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a structural diagram of the insulating connector of this utility model; Figure 5 This is an exploded view of the insulating connector of this utility model; Figure 6 This is a cross-sectional view of the second insulating sleeve of this utility model; Figure 7 This is an exploded view of the motor of this utility model; Figure 8 yes Figure 7 Enlarged view of point B in the middle; Figure 9 This is a three-dimensional cross-sectional view of the motor of this utility model; Figure 10 yes Figure 9 A magnified view of point C in the middle.

[0020] Explanation of key figure labels: 1. Gearbox; 11. Housing; 12. First transmission unit; 2. Motor; 21. End cover; 211. Port; 22. Housing; 23. Rotor; 24. Second transmission unit; 25. Encoder; 251. Wire; 252. Circuit board; 253. Magnetoresistive sensor; 26. Mounting component; 27. Magnetic ring; 3. Insulating connector; 31. First insulating sleeve; 311. Through hole; 312. Annular slope; 32. Second insulating sleeve; 321. Head isolation groove; 322. Rod isolation groove; 33. Fastener. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to include a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0027] Please see Figures 1 to 3 As shown, this application embodiment provides a geared motor, including a gearbox 1, a motor 2, and an insulating connector 3. The gearbox 1 is provided with a housing 11 on its exterior. The motor 2 includes a housing 22 and an encoder 25. The motor 2 is provided with a housing 22 on its exterior, and the encoder 25 is located inside the housing 22. The housing 22 isolates the encoder 25 from the outside environment, which can prevent external oil fumes and other impurities from adversely affecting the encoder 25, so that the encoder 25 can work in a stable and clean environment.

[0028] Insulating connector 3 separates housing 11 from outer casing 22, preventing them from contacting each other. Gearbox 1 and motor 2 are fixedly connected via insulating connector 3. This connection ensures a stable link between housing 11 and outer casing 22, preventing direct contact and eliminating the possibility of electric shock from motor 2.

[0029] Please see Figure 2 As shown, in addition to the fixed connection between the external housing 11 and the outer casing 22, the gearbox 1 and the motor 2 also have a transmission connection between their internal components. The gearbox 1 has a first transmission part 12, which is movably connected to the gearbox 1. The outer casing 22 has a second transmission part 24, which is movably connected to the outer casing 22. The first transmission part 12 and the second transmission part 24 are transmissionally connected.

[0030] In this embodiment, the first transmission part 12 is a worm gear. The rotation of the worm gear in the motor 2 inputs torque into the gearbox 1. The second transmission part 24 is a worm wheel, which meshes with the worm gear. The worm gear drives the worm wheel to rotate, and the worm wheel then outputs torque through other gear components. Under normal operating conditions, there is significant friction and impact load between the first transmission part 12 and the second transmission part 24. To ensure the service life of the first transmission part 12 and the second transmission part 24, they are generally made of metal. However, this can also create a conductive path between the motor 2 and the gearbox 1. To eliminate the possibility of electrical conduction between the motor 2 and the gearbox 1, the first transmission part 12 is made of insulating material, and / or the second transmission part 24 is made of insulating material. The insulating material here can be a carbon fiber composite material with carbon fiber as the reinforcement and epoxy resin, polyimide, or other matrices. The specific strength of carbon fiber composite material is 5 times that of steel, and it has wear resistance, chemical corrosion resistance, and good insulation properties, making it suitable as a material for the first transmission part 12 and / or the second transmission part 24. It can also be PC alloy, bakelite, or other materials that are wear-resistant, impact-resistant, and electrically insulating.

[0031] Please see Figure 3As shown, in some embodiments, the insulating connector 3 includes a first insulating sleeve 31 and fasteners 33. The first insulating sleeve 31 adheres to the side of the housing 11 near the outer casing 22, and / or adheres to the side of the outer casing 22 near the housing 11. The first insulating sleeve 31 prevents the housing 11 from directly contacting the outer casing 22, preventing current from being transferred from the outer casing 22 to the housing 11 when the motor 2 leaks electricity. At least two fasteners 33 pass through the first insulating sleeve 31, the housing 11, and the adjacent partition of the outer casing 22, and are threadedly connected to the housing 11 and / or the outer casing 22. The fasteners 33 fix the housing 11, the outer casing 22, and the first insulating sleeve 31 together, maintaining a stable and fixed positional relationship between the motor 2 and the gearbox 1, while preventing the housing 11 and the outer casing 22 from forming a power path, thus preventing electric shock to the user.

[0032] Please see Figures 4 to 6 As shown, in some embodiments, to ensure the strength of the fixed connection between the housing 11 and the outer casing 22, the fasteners 33 used to connect the outer casing 22 and the housing 11 are generally metal screws, studs, or other similar materials. Current may flow from the motor 2 to the gearbox 1 through the fasteners 33. A second insulating sleeve 32 is provided on the housing 11 or outer casing 22 corresponding to the position of the fastener 33. The two ends of the fastener 33 are located inside the housing 11 and outer casing 22, respectively, and are fixedly connected to the housing 11 and outer casing 22, respectively. At least one end of the fastener 33 is fitted with the second insulating sleeve 32 to isolate the fastener 33 from the housing 11 and / or to isolate the fastener 33 from the outer casing 22.

[0033] When a stud is used as a fastener 33, at least one end of the stud is fitted with a second insulating sleeve 32, and both ends of the stud are threadedly connected to the housing 11 or the outer casing 22. This not only fixes the housing 11 and the outer casing 22, but also prevents the current from being transmitted to the gearbox 1 through the fastener 33 when the motor 2 leaks electricity.

[0034] Please see Figure 6 As shown, in this embodiment, the fastener 33 includes a head and a rod. The fastener 33 is generally a screw or bolt. The head of the fastener 33 is engaged within the housing 11 or outer casing 22, and the corresponding end of the rod, away from the head, is threadedly connected to the outer casing 22 or housing 11. The second insulating sleeve 32 includes a head isolation groove 321 and a rod isolation groove 322. The rod passes through the rod isolation groove 322, and the head is in contact with the bottom surface of the head isolation groove 321. The head isolation groove 321 prevents the head of the fastener 33 from directly contacting the housing 11 or outer casing 22, and the rod isolation groove 322 prevents the rod of the fastener 33 from directly contacting the housing 11 or outer casing 22 when it passes through the wall thickness section. This eliminates the conductive path of current being transmitted from the motor 2 to the gearbox 1 through the fastener 33.

[0035] Please see Figure 5 and Figure 6 As shown, the housing 11 or outer shell 22 has a through hole 311 corresponding to the position of the second insulating sleeve 32. The through hole 311 has an annular slope 312 that reduces the diameter gradient of the through hole 211. The outer wall of the second insulating sleeve 32 is shaped to fit against the annular slope 312. On the one hand, the guiding effect of the annular slope 312 allows the second insulating sleeve and the fastener 33 to quickly maintain a coaxial relative position with the through hole 311, facilitating rapid assembly of the second insulating sleeve 32 and the fastener 33. On the other hand, the second insulating sleeve 32 is generally made of an elastic insulating material. During the tightening of the fastener 33, due to the action of the annular slope 312, the second insulating sleeve 32 exerts a radial elastic deformation force on the fastener 33, making it difficult for the second insulating sleeve 32 to detach from the fastener 33, preventing the fastener 33 from connecting the electrical path between the housing 11 and the outer shell 22 due to the loosening of the second insulating sleeve 32.

[0036] Please see Figures 7 to 8 As shown, the motor 2 also includes a mounting component 26 and an end cover 21. The mounting component 26 provides a mounting position for the encoder 25, and the end cover 21 encloses both the mounting component 26 and the encoder 25 within the housing 22. The mounting component 26 is typically rigidly connected to the housing 22 or the end cover 21 (e.g., by welding or screw fastening), providing a stable base for the encoder 25. This structure reduces the impact of rotor 23 rotation or bearing vibration on the encoder 25, preventing signal fluctuations caused by vibration. The enclosed design of the end cover 21 further enhances the overall structural integrity and improves the sealing performance of the housing 22, providing a stable and clean working environment for the encoder 25 and internal components of the motor 2 (rotor 23, bearings, etc.).

[0037] In the following embodiments, the end cap 21 has a through-hole 211 at the position corresponding to the mounting member 26. The wire 251 of the encoder 25 passes through the through-hole 211 and is electrically connected to the external circuit. The encoder 25 receives power and transmits electrical signals through the wire 251. The space between the through-hole 211 and the wire 251 is filled with sealant to improve the sealing performance of the through-hole 211 and prevent external dust and other impurities from entering the housing 22 through the through-hole 211.

[0038] Please see Figures 9 to 10As shown, in some embodiments, the motor 2 includes a rotor 23, and the encoder 25 includes a circuit board 252 and a magnetoresistive sensor 253. A magnetic ring 27 is provided on the rotor 23 at a position corresponding to the magnetoresistive sensor 253, and the magnetic ring 27 is circumferentially fixed to the rotor 23. The magnetoresistive sensor 253 is used to sense the magnetic signal of the magnetic ring 27, and the magnetoresistive sensor 253 is electrically connected to the circuit board 252, which is fixedly connected to the mounting component 26. When the rotor 23 rotates, the magnetic ring 27 rotates with the rotor 23 and transmits the changing magnetic signal to the magnetoresistive sensor 253, enabling the encoder 25 to detect the movement of the rotor 23. The encoder 25 based on the magnetoresistive sensor 253 and the magnetic ring 27 has the advantage of being resistant to contamination. The magnetoresistive sensor 253 detects signals by changes in the magnetic field and is not directly affected by contaminants such as water, oil, and dust. Compared to the photoelectric encoder 25 (which is prone to failure due to contaminants blocking the light path), this characteristic of the magnetic encoder 25 makes it more suitable for working in harsh environments and reduces the impact of contaminants on the performance of the encoder 25.

[0039] In some embodiments, another aspect of this utility model discloses a household appliance, including a body and the aforementioned geared motor 2, wherein the geared motor 2 is disposed on the body. Household appliances using the aforementioned geared motor 2 are less likely to result in electric shock to the user from contact with the gearbox 1, and the encoder 25 can also function normally in dusty or contaminated environments, showing less adverse effects from impurities.

[0040] In some embodiments, the working principle of the geared motor is as follows: An insulating connector 3 is provided between the housing 22 of the motor 2 and the housing 11 of the gearbox 1. The insulating connector 3 maintains a relatively fixed connection between the housing 22 and the housing 11, and isolates the direct contact between the housing 22 and the housing 11, preventing leakage of current from the motor 2 and the formation of an electrical path between the housing 22 and the housing 11. The encoder 25 is installed inside the housing 22, which can prevent external dust, moisture and other impurities from adversely affecting the normal operation of the encoder 25.

[0041] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A reduction motor characterized by, include: Gearbox, the gearbox including a housing; The motor includes a housing and an encoder, the encoder being disposed inside the housing, and the gearbox being fixedly connected to the motor; An insulating connector that separates the housing from the outer casing, preventing the housing from contacting the outer casing.

2. The reduction gear motor according to claim 1, characterized by The gearbox further includes a first transmission part disposed within the housing, and a second transmission part disposed within the housing; the first transmission part and the second transmission part are connected in a transmission manner, the first transmission part being made of an insulating material, and / or the second transmission part being made of an insulating material.

3. The reduction motor of claim 1, wherein The insulating connector includes a first insulating sleeve and a fastener, wherein the first insulating sleeve is fitted to the side of the housing near the outer shell, and / or fitted to the side of the outer shell near the housing. At least two of the fasteners pass through the first insulating sleeve, the housing, and the adjacent partition of the outer casing, and are threadedly connected to the housing and / or the outer casing.

4. The reduction gear motor according to claim 3, characterized in that The two ends of the fastener are located inside the housing and the outer shell, respectively, and are fixedly connected to the housing and the outer shell, respectively; At least one end of the fastener is fitted with a second insulating sleeve to isolate the fastener from the housing and / or to isolate the fastener from the outer casing.

5. The reduction gear motor according to claim 4, characterized in that, The fastener includes a head and a rod, and the second insulating sleeve includes a head isolation groove and a rod isolation groove; the rod passes through the rod isolation groove, and the head is in contact with the bottom surface of the head isolation groove.

6. The reduction gear motor according to any one of claims 4-5, characterized in that, The housing or the outer casing has a through hole at the position corresponding to the second insulating sleeve. The through hole has an annular slope that reduces the diameter of the through hole. The outer wall of the second insulating sleeve fits into the annular slope.

7. The gear motor of claim 1, wherein The motor also includes a mounting component and an end cover. The mounting component provides a mounting position for the encoder, and the end cover encloses both the mounting component and the encoder within the housing.

8. The reduction gear motor according to claim 7, characterized in that, The end cap has a through-hole corresponding to the position of the mounting component. The encoder wire passes through the through-hole and is electrically connected to the external circuit. The space between the through-hole and the wire is filled with sealant.

9. The geared motor according to any one of claims 7-8, characterized in that, The motor includes a rotor, the encoder includes a circuit board and a magnetoresistive sensor, a magnetic ring is provided on the rotor corresponding to the position of the magnetoresistive sensor, and the magnetic ring is circumferentially fixed to the rotor; the magnetoresistive sensor is used to sense the magnetic signal of the magnetic ring, and the magnetoresistive sensor is electrically connected to the circuit board; the circuit board is fixedly connected to the mounting component.

10. A domestic appliance characterized in that, It includes a fuselage and a geared motor as described in any one of claims 1-9, wherein the geared motor is disposed on the fuselage.

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