Motor for household food processing appliance

Abstract

The utility model discloses a motor for a household food processing appliance, which comprises a casing, a rotor part and a stator part, the rotor part penetrates through the casing, and the stator part is attached to the inner wall of the casing; the stator part comprises a magnetic steel, the magnetic steel is tile-shaped, the magnetic steel comprises an outer wall and an inner wall, the outer wall is arc-shaped, the inner wall comprises an arc part and tangent parts symmetrically arranged at the two ends of the arc part, and the distance d between the circle center of the arc part and the circle center of the outer wall is greater than zero. According to the utility model, through improving the shape of the tile-shaped magnetic steel, the tile-shaped magnetic steel can generate more uniform sine waves, thereby achieving the purposes of reducing vibration, reducing noise and prolonging the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of motor for household food material processing appliance. BACKGROUND

[0002] The use of household food material processing appliance greatly facilitates the operation of user, the magnetic steel in the internal motor of existing household food material processing appliance generally adopts tile-shaped magnetic steel, the outer wall and inner wall of existing tile-shaped magnetic steel are generally concentrically arranged, this kind of tile-shaped magnetic steel causes that the harmonic of motor generated is larger, vibration intensity is big, to also cause the problems of large noise, short service life. SUMMARY

[0003] In view of the deficiencies of prior art, the utility model provides a kind of motor for household food material processing appliance, the motor makes it produce more uniform sine wave by improving the shape of tile-shaped magnetic steel, to reach the purpose of reducing vibration, reducing noise, prolonging service life.

[0004] The utility model discloses the following technical scheme realizes:

[0005] A kind of motor for household food material processing appliance, including casing, rotor piece and stator piece, the rotor piece is arranged through the casing, the stator piece is attached to the inner wall of the casing and is arranged, the stator piece includes magnetic steel, the magnetic steel is tile-shaped, and the magnetic steel includes outer wall and inner wall, the outer wall is circular arc, the inner wall includes circular arc portion and tangent portion symmetrically arranged at the both ends of the circular arc portion, the distance d between the center of the circular arc portion and the center of the outer wall is greater than zero.

[0006] Further, the tangent portion and the circular arc portion exist intersection point, the included angle a between the radius r of the circular arc portion at intersection point and the tangent line of the tangent portion is 88-92 degrees.

[0007] Further, the included angle a is 90 degrees.

[0008] Further, the central angle b corresponding to the circular arc portion is 73-77 degrees.

[0009] Further, the central angle c corresponding to the outer wall is 133-137 degrees.

[0010] Further, the ratio between the radius R2 of the circular arc portion and the radius R1 of the outer wall is 0.9-0.95.

[0011] Further, the magnetic steel is provided with at least two, and elastic buckle is arranged between adjacent magnetic steel for fixing the magnetic steel.

[0012] Further, the elastic buckle is provided with a flange structure on both sides, the flange structure comprises a first flange and a second flange, the first flange and the second flange form a V shape, the magnetic steel is provided with a first abutting surface and a second abutting surface near the side of the elastic buckle, and the first abutting surface is attached to the first flange, and the second abutting surface is at least partially attached to the second flange.

[0013] Further, the elastic buckle is provided with a guide part at one end in the axial direction, and the width of the guide part gradually decreases along the pressing direction of the elastic buckle.

[0014] Further, the motor comprises a shell and a fastening piece, the fastening piece is elastic, one end of the fastening piece is fixed on the shell, and the other end of the fastening piece extrudes the wire of the motor on the shell by its own elasticity.

[0015] Further, the fastening piece is integrally formed and comprises a body part and a limiting part, the body part is provided with a locking hole, a screw passes through the locking hole to fix the fastening piece on the shell, and the limiting part extrudes the wire of the motor on the shell.

[0016] Further, the limiting part is provided with a through groove, the axial direction of the through groove is consistent with the direction of the wire to pass through the wire.

[0017] Further, the limiting part is provided with a flange part, the flange part is located at the axial end of the through groove to extrude the wire of the motor on the shell.

[0018] Further, the flange part is bent away from the direction of the through groove to avoid cutting the wire.

[0019] Further, the stirring assembly further comprises a planetary reducer in transmission connection with the output shaft of the motor, the planetary reducer comprises a shell and a gear ring, the shell is provided with a mounting cavity for mounting the gear ring, and the gear ring is loosely fitted in the mounting cavity.

[0020] Further, the inner circumferential wall of the mounting cavity and the outer circumferential wall of the gear ring are limited by a limiting assembly.

[0021] Further, the limiting assembly comprises a limiting groove opened on the inner circumferential wall of the mounting cavity and a limiting block protruding on the outer circumferential wall of the gear ring, or a limiting block protruding on the inner circumferential wall of the mounting cavity and a limiting groove opened on the outer circumferential wall of the gear ring, and the limiting block is loosely fitted in the limiting groove.

[0022] Further, the shell comprises a first shell and a second shell which are detachably connected to each other, the mounting cavity is formed between the first shell and the second shell, and a part of the limiting groove or limiting block is formed on the first shell and another part of the limiting groove or limiting block is formed on the second shell.

[0023] Further, the first shell is recessed in an axial direction to form a positioning groove, and the second shell is provided with a positioning portion matched with the positioning groove.

[0024] Further, the planetary reducer further comprises a sun gear, a plurality of planet gears and a planet carrier, the sun gear is coaxially and fixedly connected with the output shaft of the motor, the plurality of planet gears are simultaneously engaged with the outer ring of the sun gear and the inner ring of the gear ring, and the planet carrier rotates synchronously with the planet gears.

[0025] Further, the planetary reducer is used for transmitting the output torque of the motor to the belt reducer.

[0026] Compared with the prior art, the motor has the advantages that:

[0027] 1. The eccentric structure of the magnetic steel is designed to optimize the eccentricity and generate more uniform sine waves, reduce vibration and noise, and also reduce wear and tear in the commutation process, improve commutation and prolong the service life of the motor.

[0028] 2. The bottom wall of the magnetic steel is designed as a circular arc segment in the middle and tangent segments symmetrically arranged on both sides of the circular arc segment to generate more uniform sine waves, optimize the eccentricity, reduce vibration and noise.

[0029] 3. The ratio between the radius R2 of the circular arc portion at the inner wall and the radius R1 of the outer wall is designed as 0.9-0.95, compared with the traditional magnetic steel, the radial thickness of the magnetic steel is thinned, the size of the rotor can be adaptively adjusted, and higher power requirements can be met.

[0030] 4. The wire is fixed by the clamping member, the clamping member is elastic and only needs to be locked on one side, and the locking and dismounting process is simple and easy to operate.

[0031] 5. The planetary reducer is arranged at the output end of the motor, the output torque of the motor is reduced by the planetary reducer, and then combined with the belt speed regulation, the effect is better and more accurate.

[0032] 6、The shell of the planetary reducer is formed with a mounting cavity for mounting the gear ring and a limiting groove for limiting the gear ring, and the gear ring is in loose fit with the mounting cavity and the limiting groove, so that the planetary gear can be slightly shifted during operation to realize real-time alignment action, and the structure is simple and optimized, and the cost is low. The above-mentioned slight alignment action can compensate for the machining and assembly errors of each structure, and has the effect of reducing noise; in addition, no additional eccentric force is applied to the output shaft of the motor during operation, so that the appearance of rotor eccentricity is avoided, noise is reduced, and the starting torque is also guaranteed, which has the effect of improving power. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Fig. 1 is a structural schematic diagram of a motor;

[0034] Figure 2 Fig. 2 is a partial structural sectional view of the motor;

[0035] Figure 3 Fig. 3 is a schematic diagram of the assembly structure of a magnetic steel and an elastic buckle;

[0036] Figure 4 Fig. 4 is an exploded view of the magnetic steel and the elastic buckle;

[0037] Figure 5 Fig. 5 is a top view of the magnetic steel;

[0038] Figure 6 Fig. 6 is a schematic diagram of a tight buckle structure;

[0039] Figure 7 Fig. 7 is an exploded view of a partial structure of the motor;

[0040] Figure 8 Fig. 8 is a schematic diagram of a second shell structure;

[0041] Figure 9 Fig. 9 is a schematic diagram of a partial structure of the motor;

[0042] Figure 10 Fig. 10 is a sectional view of the motor;

[0043] Figure 11 Fig. 11 is a schematic diagram of the overall structure of a dough mixer.

[0044] 100. Motor; 101. Output shaft; 110. Magnet; 111. First abutment surface; 112. Second abutment surface; 120. Outer wall; 130. Inner wall; 131. Arc portion; 132. Tangent portion; 133. Intersection point; 140. Elastic buckle; 141. Flanged structure; 142. First flange; 143. Second flange; 144. Guide portion; 150. Housing; 160. Fastener; 161. Body portion; 163. Locking hole; 162. Limiting portion; 164. 165. Through slot; 170. Flanged part; 200. Wire; 210. Planetary reducer; 211. First housing; 211. Positioning slot; 220. Second housing; 221. Mounting cavity; 222. Limiting slot; 223. Positioning part; 230. Gear ring; 231. Limiting block; 240. Sun gear; 250. Planet gear; 260. Planet carrier; 261. Rotating shaft; 262. Bearing; 300. Body assembly; 400. Base; 500. Mixing bowl; 600. Mixing assembly. Detailed Implementation

[0045] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, 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," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0046] This utility model discloses a motor for a household food processor, wherein the household food processor is exemplified by a dough mixer. Figure 11 The dough mixer includes a body assembly 300, a base 400, a dough mixing bowl 500, and a mixing component 600. The base 400 is mounted on the body assembly 300, the dough mixing bowl 500 is set on the base 400, and the mixing component 600 is set on the body assembly 300 for mixing the ingredients in the dough mixing bowl 500. In addition, this motor can also be used in other small household appliances.

[0047] like Figures 1-5As shown, the stirring assembly 600 includes a motor 100, which comprises a housing 150, a rotor, and a stator. The rotor extends through the housing 150, and the stator is fitted against the inner wall of the housing 150 with a clearance fit to the outer circumferential surface of the rotor. The stator includes a magnet 110, which is tile-shaped and includes an outer wall 120 and an inner wall 130. The outer wall 120 is arc-shaped, and the inner wall 130 includes an arc portion 131 and tangent portions 132 symmetrically arranged at both ends of the arc portion 131. The distance d between the center of the arc portion 131 and the center of the outer wall 120 is greater than zero. Compared to traditional concentric magnets, this invention uses an eccentric structure design for the magnet 100 to generate a more uniform sine wave, reducing vibration and noise. Based on the more uniform sine wave magnetic field, it can also reduce wear during the commutation process, improve commutation, and extend the motor's service life.

[0048] like Figure 5 As shown, there is an intersection point 133 between the tangent portion 132 and the arc portion 131. The angle α formed between the straight line containing the radius r of the arc portion 131 at the intersection point 133 and the straight line containing the tangent of the tangent portion 132 is 88 to 92 degrees, preferably 90 degrees. A chamfering process is used to form a more uniform sinusoidal magnetic field.

[0049] like Figure 5 As shown, the central angle b corresponding to the arc portion 131 is 73 to 77 degrees to form a more uniform sinusoidal magnetic field. In this embodiment, the central angle b corresponding to the arc portion 131 is 75 degrees.

[0050] like Figure 5 As shown, the central angle c corresponding to the outer wall 120 is 133 to 137 degrees. In this embodiment, the central angle c corresponding to the outer wall 120 is 135 degrees, that is, the central angle corresponding to each tangent portion 132 is 30 degrees.

[0051] like Figure 5 As shown, the ratio between the radius R2 of the arc portion 131 and the radius R1 of the outer wall 120 is 0.9-0.95. The ratio of the inner wall radius to the outer wall radius of a conventional magnet is approximately 0.7-0.75. Compared to conventional magnets, this invention reduces the radial thickness of the magnet 110, allowing for adaptive adjustment of the rotor dimensions to meet higher power requirements. In this embodiment, the radius R1 of the outer wall 120 is 37.5 mm, and the radius R2 of the arc portion 131 is 35.2 mm.

[0052] The above-mentioned specific design of parameters such as central angle and radius in multiple directions is used to make a more uniform sinusoidal magnetic field form inside the motor 100 during operation.

[0053] like Figure 3As shown, the magnetic steel 110 is provided with at least two, and the elastic buckle 140 is arranged between the adjacent magnetic steels 110 for fixing the magnetic steel 110. In the embodiment, the magnetic steel 110 is provided with two, and the two magnetic steels 110 are symmetrically arranged and form a ring, and the two connecting parts of the two magnetic steels 110 are fixed by the elastic buckle 140. Specifically, the outer wall 120 of the magnetic steel 110 and the inner side wall of the shell 150 are designed in a profiled manner, so that the magnetic steel 110 can be attached to the inner side wall of the shell 150. The elastic buckle 140 is also profiled between the inner wall of the shell 150, and the two ends of the elastic buckle 140 are respectively in interference abutment with the adjacent side walls of the two magnetic steels 110, which on the one hand ensures that the elastic buckle 140 is fixed and can be attached to the inner side wall of the shell 150, and on the other hand also realizes the fixing of the two magnetic steels 110.

[0054] As shown, Figure 4 The two sides of the elastic buckle 140 are formed with a flange structure 141, the flange structure 141 includes a first flange 142 and a second flange 143, the first flange 142 and the second flange 143 form a V shape, the side of the magnetic steel 110 close to the elastic buckle 140 is formed with a first abutting surface 111 and a second abutting surface 112, and the first abutting surface 111 is attached to the first flange 142, and the second abutting surface 112 is at least partially attached to the second flange 143. The contact between the elastic buckle 140 and the magnetic steel 110 is improved from one face to two faces, which can make the elastic buckle 140 have an additional circumferential force to tighten the magnetic steel 110, and the elastic buckle 140 is also less likely to fall off. In addition to the circumferential force, the reaction force generated by the magnetic steel 110 under the abutting force of the first flange 142 inclined to the center can make the magnetic steel more attached to the inner side wall of the shell 150.

[0055] As shown, Figure 3 In order to more conveniently press-fit the elastic buckle 140 between the magnetic steels 110, the elastic buckle 140 is formed with a guide portion 144 at one end in the axial direction, and the width of the guide portion 144 gradually decreases along the press-fitting direction of the elastic buckle 140.

[0056] As shown, Figure 1 The motor 100 includes a shell 150 and a tight buckle 160, the tight buckle 160 has elasticity, one end of the tight buckle 160 is fixed on the shell 150, and the other end of the tight buckle 160 relies on its own elasticity to extrude the wire 170 of the motor 100 on the shell 150. Inside or outside the motor 100, there is a relatively long wire 170, which needs to be fixed, and the conventional way is to use a strap or a buckle to lock, which is relatively complex to install and disassemble, especially the buckle, which needs at least two points to lock. In the embodiment, the tight buckle 160 only needs to be locked on one side, and the locking and disassembly process is simple and easy to operate.

[0057] Specifically, with reference toFigure 6 The fastening piece 160 is integrally formed and comprises a body part 161 and a limiting part 162. The body part 161 has a locking hole 163 through which a screw is passed to fix the fastening piece 160 on the casing 150. The limiting part 162 is bent at an angle towards the casing 150. Thus, the limiting part 162 can press the wire 170 of the motor 100 on the casing 150 by its elasticity without the need of being fixed by a screw, which is more convenient and faster.

[0058] As shown in Figure 6 , the limiting part 162 is formed with a passing groove 164. The axial direction of the passing groove 164 is consistent with the direction of the wire 170 for the wire 170 to pass through. The free edge of the limiting part 162 is bent towards the casing 150 to form a side wall of the passing groove 164. The free edge of the limiting part 162 can abut against the casing 150, so that the passing groove 164 can limit the wire 170.

[0059] As shown in Figure 6 , the limiting part 162 is provided with a flange part 165. The flange part 165 is located at the axial end of the passing groove 164 for pressing the wire 170 of the motor 100 on the casing 150. The flange part 165 can press the wire 170 on the outer wall of the casing 150 to prevent the wire 170 from shaking and falling off.

[0060] The flange part 165 is bent away from the passing groove 164 to avoid cutting the wire 170. In one embodiment, the extension width of the flange part in the radial direction is approximately equal to the width of the passing groove 164, so as to avoid the gap or the gap due to processing is much smaller than the width of the wire 170, which can completely press the wire 170 without cutting the wire.

[0061] As shown in Figures 7-10 , the stirring assembly 600 further comprises a planetary reducer 200 in transmission connection with the output shaft 101 of the motor 100. The planetary reducer 200 is used to transmit the output torque of the motor 100 to the belt reducer. Compared with the output end of the motor directly using the belt transmission to reduce the speed, the output torque of the motor 100 is reduced by the planetary reducer 200, and then combined with the belt speed regulation, which has better effect and higher accuracy. Moreover, the planetary reducer has better transmission ratio, which ensures that the motor 100 has high speed and high power while reducing the installation space.

[0062] The planetary reducer 200 comprises a shell and a gear ring 230, an installation cavity 221 for installing the gear ring 230 is formed in the shell, and the gear ring 230 is loosely fitted in the installation cavity 221. The planetary gear 250 engaged with the gear ring 230 can be slightly shifted during operation to realize real-time alignment action, the structure is simple and optimized, and the cost is low. The above-mentioned slight alignment action can compensate for the machining and assembly errors of each structure, and has the effect of reducing noise. In addition, no additional eccentric force is applied to the output shaft 101 of the motor during operation, thereby avoiding the generation of rotor deflection, reducing noise, and ensuring the starting torque and improving power.

[0063] The inner peripheral wall forming the installation cavity 221 and the outer peripheral wall of the gear ring 230 are limited by a limiting assembly. In an embodiment of the present application, the limiting assembly comprises a limiting groove 222 formed on the inner peripheral wall of the installation cavity 221 and a limiting block 231 protruding from the outer peripheral wall of the gear ring 230, and the limiting block 231 is loosely fitted in the limiting groove 222. In another embodiment of the present application, the limiting assembly comprises a limiting block 231 protruding from the inner peripheral wall of the installation cavity 221 and a limiting groove 222 formed on the outer peripheral wall of the gear ring 230, and the limiting block 231 is loosely fitted in the limiting groove 222. The limiting block 231 is connected to the limiting groove 222 in a loose fitting manner, so that the planetary gear 250 engaged with the gear ring 230 can be slightly shifted during operation to realize real-time alignment action, the structure is simple and optimized, and the cost is low. The above-mentioned slight alignment action can compensate for the machining and assembly errors of each structure, and has the effect of reducing noise. In addition, no additional eccentric force is applied to the output shaft 101 of the motor during operation, thereby avoiding the generation of rotor deflection, reducing noise, and ensuring the starting torque and improving power.

[0064] The shell comprises a first shell 210 and a second shell 220 which are detachably connected to each other, and the installation cavity 221 is formed between the first shell 210 and the second shell 220. In the above-mentioned embodiment, one part of the limiting groove 222 is formed on the first shell 210, and the other part of the limiting groove 222 is formed on the second shell 220; in the above-mentioned another embodiment, one part of the limiting block 231 is formed on the first shell 210, and the other part of the limiting block 231 is formed on the second shell 220.

[0065] The first shell 210 is recessed in the axial direction to form a positioning groove 211, and the second shell 220 protrudes a positioning portion 223 matched with the positioning groove 211, the positioning portion 223 and the positioning groove 211 realize precise positioning of the first shell 210 and the second shell 220, and ensure that the maximum shift of the gear ring 230 is always within a predetermined range.

[0066] Among them, the limiting groove 222 and the positioning part 223 are correspondingly arranged, in the above design, the limiting groove 222 is designed to correspond to the positioning part 223 formed by the outward protrusion, which can ensure that the wall thickness of the second shell is not affected, and also serves as a weight reduction design for the positioning part 223, thereby optimizing the overall design structure.

[0067] The planetary reducer 200 further comprises a sun gear 240, a plurality of planet gears 250 and a planet carrier 260, the sun gear 240 is coaxially fixedly connected with the output shaft 101 of the motor 100, the plurality of planet gears 250 are simultaneously engaged with the outer ring of the sun gear 240 and the inner ring of the ring gear 230, and the planet carrier 260 rotates synchronously with the planet gears 250. Since the ring gear 230 is in a loose fit relationship with the mounting cavity 221 and the limiting groove 222, the planet gears 250 can perform a slight action offset during operation, so as to realize a real-time centering action, and the structure is simple and optimized, and the cost is low. The above-mentioned slight centering action can compensate for the machining and assembly errors of each structure, and has a noise reduction effect; in addition, no additional eccentric force is applied to the output shaft 101 of the motor during operation, so that the rotor eccentricity phenomenon is avoided, the noise is reduced, and the starting torque is also ensured, thereby improving the power.

[0068] The planet carrier 260 is further connected with a rotating shaft 261, the rotating shaft 261 is drivingly connected with the belt reducer, and the rotating shaft 261 and the second shell 220 are connected through at least one bearing 262.

[0069] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as limiting the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A motor for a domestic food processing appliance comprising a housing (150), a rotor member and a stator member, the rotor member being disposed through the housing (150), the stator member being disposed against an inner wall of the housing (150), characterised in that, The stator includes a magnetic steel (110), the magnetic steel (110) is in the shape of a tile, and the magnetic steel (110) includes an outer wall (120) and an inner wall (130), the outer wall (120) is in the shape of a circular arc, and the inner wall (130) includes a circular arc portion (131) and tangent portions (132) symmetrically arranged at both ends of the circular arc portion (131), and the distance d between the center of the circular arc portion (131) and the center of the outer wall (120) is greater than zero.

2. The motor for a household food processing appliance according to claim 1, characterized in that, An intersection point (133) exists between the tangent portion (132) and the circular arc portion (131), and the included angle a between the straight line where the radius r of the circular arc portion (131) at the intersection point (133) is located and the tangent line of the tangent portion (132) is 88-92 degrees.

3. The motor for a household food processing appliance according to claim 2, characterized in that, The included angle a is 90 degrees.

4. The motor for a household food processing appliance of claim 1, wherein, The corresponding central angle b of the circular arc portion (131) is 73-77 degrees.

5. The motor for a household food processing appliance of claim 1, wherein, The corresponding central angle c of the outer wall (120) is 133-137 degrees.

6. The motor for a household food processing appliance of claim 1, wherein, The ratio between the radius R2 of the circular arc portion (131) and the radius R1 of the outer wall (120) is 0.9-0.

95.

7. The motor for a household food processing appliance of claim 1, wherein, The magnetic steel (110) is provided with at least two, and an elastic buckle (140) is arranged between adjacent magnetic steels (110) for fixing the magnetic steel (110).

8. The motor for a household food processing appliance according to claim 7, characterized in that, Both sides of the elastic buckle (140) are formed with a flanging structure (141), the flanging structure (141) includes a first flanging (142) and a second flanging (143), the first flanging (142) and the second flanging (143) form a V shape, the side edge of the magnetic steel (110) close to the elastic buckle (140) is formed with a first abutting surface (111) and a second abutting surface (112), and the first abutting surface (111) is attached to the first flanging (142), and the second abutting surface (112) is at least partially attached to the second flanging (143).

9. The motor for a household food processing appliance of claim 7, wherein, One end of the elastic buckle (140) in the axial direction is formed with a guide portion (144), and the width of the guide portion (144) gradually decreases along the pressing direction of the elastic buckle (140).

10. The motor for a household food processing appliance of claim 1, wherein, The motor (100) is further provided with a tight fitting part (160), the tight fitting part (160) has elasticity, one end of the tight fitting part (160) is fixed on the machine shell (150), and the other end of the tight fitting part (160) relies on its own elasticity to extrude the wire (170) of the motor (100) on the machine shell (150).

11. The motor for a household food processing appliance of claim 10, wherein, The tight fitting part (160) is integrally formed and includes a body portion (161) and a limiting portion (162), the body portion (161) has a locking hole (163), a screw passes through the locking hole (163) to fix the tight fitting part (160) on the machine shell (150), and the limiting portion (162) extrudes the wire (170) of the motor (100) on the machine shell (150).

12. The motor for a household food processing appliance of claim 11, wherein, The limiting portion (162) is formed with a through groove (164), and the axial direction of the through groove (164) is consistent with the direction of the wire (170) to allow the wire (170) to pass through.

13. The motor for a household food processing appliance of claim 12, wherein, The limiting part (162) is provided with a flanging part (165) at the axial end of the through groove (164) for extruding the wire (170) of the motor (100) on the casing (150).

14. The motor for a household food processing appliance of claim 13, wherein, The flanging part (165) is bent away from the through groove (164) to avoid cutting the wire (170).

15. The motor for a household food processing appliance of claim 1, wherein, The output shaft (101) of the motor (100) is drivingly connected with a planetary reducer (200), the planetary reducer (200) comprises a housing and a ring gear (230), the housing is internally formed with a mounting cavity (221) for mounting the ring gear (230), and the ring gear (230) is loosely fitted in the mounting cavity (221).

16. The motor for a household food processing appliance of claim 15, wherein, The inner circumferential wall of the mounting cavity (221) and the outer circumferential wall of the ring gear (230) are limited by a limiting assembly.

17. The motor for a household food processing appliance of claim 16, wherein, The limiting assembly comprises a limiting groove (222) opened on the inner circumferential wall of the mounting cavity (221) and a limiting block (231) protruding on the outer circumferential wall of the ring gear (230), or a limiting block (231) protruding on the inner circumferential wall of the mounting cavity (221) and a limiting groove (222) opened on the outer circumferential wall of the ring gear (230), and the limiting block (231) is loosely fitted in the limiting groove (222).

18. The motor for a household food processing appliance of claim 17, wherein, The housing comprises a first housing (210) and a second housing (220) which are detachably connected with each other, the mounting cavity (221) is formed between the first housing (210) and the second housing (220), and a part of the limiting groove (222) or the limiting block (231) is formed on the first housing (210), and the other part of the limiting groove (222) or the limiting block (231) is formed on the second housing (220).

19. The motor for a household food processing appliance of claim 18, wherein, The first housing (210) is recessed in the axial direction to form a positioning groove (211), and the second housing (220) is provided with a positioning part (223) which is fitted with the positioning groove (211).

20. The motor for a household food processing appliance of claim 15, wherein, The planetary reducer (200) further comprises a sun gear (240), a plurality of planet gears (250) and a planet carrier (260), the sun gear (240) is coaxially fixedly connected with the output shaft (101) of the motor (100), the plurality of planet gears (250) are simultaneously engaged with the outer ring of the sun gear (240) and the inner ring of the ring gear (230), and the planet carrier (260) rotates synchronously with the planet gears (250).

21. The motor for a household food processing appliance of claim 15, wherein, The planetary reducer (200) is used for transmitting the output torque of the motor (100) to a belt reducer.

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