CN216602525U - Magnetic force does not have rotatory agitating unit of axle - Google Patents

Abstract

The utility model discloses a magnetic shaftless rotary stirring device, which comprises a pot body, a stirring paddle detachably connected to the bottom of an inner cavity of the pot body and a magnetic rotary device arranged below the pot body, wherein a first magnetic ring is arranged in the stirring paddle, and a second magnetic ring which can be in adsorption fit with the first magnetic ring and a driving device for driving the second magnetic ring to rotate are arranged in the magnetic rotary device; when the driving device drives the second magnetic ring to rotate, the first magnetic ring can be driven to rotate, so that the rotation of the stirring paddle is realized; in addition, the pot also comprises a temperature sensing element arranged below the pot body, and the temperature sensing element is abutted against the bottom of the pot body. According to the stirring device, when the driving device drives the second magnetic ring to rotate, the first magnetic ring can be driven to rotate under the mutual attraction effect of the first magnetic ring and the second magnetic ring, so that the stirring paddle rotates, the shaftless rotary connection between the pot body and the stirring paddle is realized, and the flatness and the attractiveness of the inner cavity of the pot body are further ensured.

Description

Magnetic force does not have rotatory agitating unit of axle

Technical Field

The utility model relates to the technical field of cooking appliances, in particular to a magnetic shaftless rotary stirring device.

Background

At present, cooking appliances on the market, such as a cooking machine, a food processor and the like, generally can be provided with a stirring paddle in a pot body in order to stir or stir food, so that the bottom of the pot body can be provided with a fixed connecting shaft, the flatness and the attractiveness of a cavity in the pot are influenced, and the residual food in the pot is cleaned. In addition, the temperature sensing device on the cooking utensil also needs to be separated from the heating element or the transmission device, so that the occupied space of the corresponding structure is enlarged.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides the magnetic shaftless rotary stirring device, which can realize shaftless rotary connection between the pot body and the stirring paddle and ensure the flatness and the attractiveness of the inner cavity of the pot body.

The technical scheme adopted by the utility model for solving the problems is as follows:

the utility model provides a magnetic force does not have rotatory agitating unit of axle, includes the pot body, can dismantle the connection and be in the stirring rake of pot body inner chamber bottom and setting are in the magnetic force rotary device of pot body below, wherein:

a first magnetic ring is arranged in the stirring paddle, and a second magnetic ring which can be in adsorption fit with the first magnetic ring and a driving device for driving the second magnetic ring to rotate are arranged in the magnetic rotating device; when the driving device drives the second magnetic ring to rotate, the first magnetic ring can be driven to rotate, so that the rotation of the stirring paddle is realized;

the pot also comprises a temperature sensing element arranged below the pot body, and the temperature sensing element is abutted against the bottom of the pot body.

According to the stirring device, when the driving device drives the second magnetic ring to rotate, the first magnetic ring can be driven to rotate under the mutual attraction effect of the first magnetic ring and the second magnetic ring, so that the stirring paddle rotates, the shaftless rotary connection between the pot body and the stirring paddle is realized, and the flatness and the attractiveness of the inner cavity of the pot body are ensured. In addition, the stirring paddle can be directly detached from the pot body, and the stirring paddle is simple to operate and convenient to clean.

Further, the pot also comprises a heating disc arranged between the pot body and the magnetic rotating device, and the temperature sensing element is arranged on the heating disc and is abutted against the bottom of the pot body.

Therefore, the temperature sensing element is arranged on the heating plate, the utilization rate of space can be improved, and the occupation of installation space is reduced.

Further, still including setting up the dish that generates heat between the pot body and the magnetic force rotary device, the magnetic force rotary device still includes the support and installs thermal-insulated cover on the support, be equipped with on the thermal-insulated cover and pass the first step of dish that generates heat, temperature-sensing element sets up on the first step and with the bottom of the pot body is contradicted.

Therefore, the temperature sensing element is arranged on the heat shield, the utilization rate of space can be improved, and the occupation of installation space is reduced.

Furthermore, the bottom of the heating plate is provided with a mounting column for fixing in a cooking utensil, an elastic part is sleeved on the mounting column, one end of the elastic part is abutted against the bottom of the heating plate, and the other end of the elastic part is abutted against the cooking utensil;

under the elastic force of the elastic piece, the heating plate can be driven to be attached to the bottom of the pot body.

In particular, the elastic member is a spring.

Therefore, the heating plate can be always attached to the bottom of the pot body under the action of the spring, so that a good heat transfer effect is ensured.

Furthermore, a first cavity is formed between the inside of the heat shield and the support, and the second magnetic ring is arranged in the first cavity.

Furthermore, the magnetic bearing further comprises a shielding ring which is arranged in the first cavity and is positioned below the second magnetic ring, and the top surface of the shielding ring is adsorbed with the bottom surface of the second magnetic ring.

Thus, by providing the shield ring, the magnetic flux lines can be shielded, and thus, the magnetic flux lines are prevented from adsorbing iron objects, tableware, and the like.

Furthermore, the driving device comprises a motor and a gear transmission mechanism which are arranged on the support, and the motor drives the shielding ring to rotate through the gear transmission mechanism so as to drive the second magnetic ring to rotate.

Further, gear drive is including rotating the connection and being in gear seat on the support sets up first gear and cover on the gear seat are established on the power output shaft of motor and with first gear mesh driven second gear mutually, be equipped with on the gear seat and pass the support stretches into first boss in the first cavity, the screening ring is installed on the first boss.

Further, still include the bearing, the bearing includes interior ring sum outer ring, wherein:

the inner circle ring is sleeved on the first boss and forms interference fit;

the support is provided with a first mounting hole, and the bearing is mounted in the first mounting hole and the inner side wall of the outer ring and the first mounting hole form interference fit.

Further, establish including the cover solid fixed ring on the first boss, gu fixed ring's bottom surface with the interior becket of bearing is inconsistent, gu fixed ring's top surface with the bottom surface of shield ring is inconsistent.

In summary, the magnetic shaftless rotating stirring device provided by the utility model has the following beneficial effects:

(1) when the driving device drives the second magnetic ring to rotate, the first magnetic ring can be driven to rotate under the mutual attraction effect of the first magnetic ring and the second magnetic ring, so that the rotation of the stirring paddle is realized, the shaftless rotary connection between the pot body and the stirring paddle is realized, and the flatness and the attractiveness of the cavity in the pot body are ensured. In addition, the stirring paddle can be directly detached from the pot body, and the stirring paddle is simple to operate and convenient to clean.

(2) The temperature sensing element is arranged on the heating disc or the heat shield, so that the utilization rate of space can be improved, and the occupation of installation space is reduced.

Drawings

FIG. 1 is an exploded view of the magnetic shaftless rotary stirring apparatus of the present invention;

FIG. 2 is a schematic view of the structure of the stirring paddle of the present invention;

FIG. 3 is a schematic structural view of a heating plate according to the present invention;

FIG. 4 is an exploded view of the magnetic rotating apparatus of the present invention;

FIG. 5 is a schematic structural diagram of a temperature sensing element in the magnetic rotating apparatus according to the present invention;

FIG. 6 is a schematic view of a heat shield of the magnetic rotating apparatus according to the present invention;

FIG. 7 is a schematic view of another perspective of the heat shield of the magnetic rotating apparatus of the present invention;

FIG. 8 is a schematic structural view of a shielding ring of the magnetic rotating apparatus according to the present invention;

FIG. 9 is a schematic structural view of a bracket of the magnetic rotating apparatus of the present invention;

FIG. 10 is a schematic structural view of a bracket of the magnetic rotating apparatus of the present invention from another perspective;

FIG. 11 is a schematic view of a bearing structure of the magnetic rotating apparatus according to the present invention;

FIG. 12 is a schematic structural view of a gear seat of the magnetic rotating apparatus according to the present invention;

FIG. 13 is a schematic structural view of another angle of view of the gear seat of the magnetic rotating apparatus of the present invention;

FIG. 14 is a schematic structural view of a positioning sleeve of the magnetic rotating apparatus of the present invention;

FIG. 15 is a schematic structural view of a second gear of the magnetic rotating apparatus according to the present invention;

FIG. 16 is a schematic structural view of a second gear of the magnetic rotating apparatus according to another aspect of the present invention;

FIG. 17 is a schematic view of a motor of the magnetic rotating apparatus according to the present invention;

FIG. 18 is a schematic cross-sectional view of a magnetic shaftless rotary stirring apparatus of the present invention;

FIG. 19 is an enlarged view of a portion A of FIG. 18;

FIG. 20 is a cross-sectional view of the magnetic rotating apparatus of the present invention.

Wherein the reference numerals have the following meanings:

1. a stirring paddle; 11. a housing; 12. a cylinder; 13. stirring blades; 14. a first magnetic ring; 2. a pan body; 3. a heating plate; 31. a first through hole; 32. mounting a column; 33. an elastic member; 4. a magnetic rotating device; 411. a temperature sensing element; 4111. a temperature sensing probe; 4112. a lead wire; 412. fixing a sleeve; 42. a heat shield; 421. a first step; 4211. a first counterbore; 4212. a second through hole; 422. a second step; 423. a flange edge; 424. a second mounting hole; 425. a water outlet hole; 426. a first cavity; 431. a second magnetic ring; 432. a shield ring; 4321. a groove; 4322. a third mounting hole; 433. a fixing ring; 434. locking the screw; 44. a support; 441. a third through hole; 442. a first mounting hole; 443. buckling; 444. a fourth mounting hole; 445. a second counterbore; 446. a first stud; 447. a second stud; 448. a convex edge; 45. a bearing; 451. an inner circular ring; 452. an outer ring; 46. a gear seat; 461. a first gear; 462. a second boss; 463. a first boss; 464. a rib is protruded; 465. a fifth mounting hole; 466. a fourth via hole; 467. a second cavity; 47. a positioning sleeve; 471. a first positioning sleeve; 472. a second positioning sleeve; 473. reinforcing ribs; 48. a second gear; 481. a rotating shaft; 482. a sixth mounting hole; 49. a motor; 491. a power take-off shaft; 492. and fixing the lug.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1-20, the utility model provides a magnetic shaftless rotary stirring device, which comprises a stirring paddle 1, a pot body 2, a heating disc 3 and a magnetic rotary device 4, wherein the stirring paddle 1 is detachably fixed at the bottom of an inner cavity of the pot body 2 and is abutted against the bottom; the pan body 2 is a common pan which is used for containing cooking food, the upper end of the pan body is an opening, and a cavity for containing the food is arranged in the pan body; the stirring paddle 1 and the pot body 2 are fixedly arranged in cooking appliances such as an electric cooker, a high-pressure cooker, a cooking machine and the like in a detachable mode. The heating plate 3 and the magnetic rotating device 4 are fixedly arranged in the cooking utensil and positioned at the bottom of the pot body 2, and the heating plate 3 can transfer heat to the pot body 2 so as to heat food; the magnetic rotating device 4 can drive the stirring paddle 1 to rotate in a magnetic induction mode, so that the food in the pot body 2 can be stir-fried and stirred.

Referring to fig. 2, the stirring paddle 1 includes a cylindrical housing 11 and a hexagonal column 12 disposed on the housing 11, and a stirring blade 13 is further mounted on a side wall of the housing 11. A first magnetic ring 14 is arranged in the shell 11, and the first magnetic ring 14 is a driven rotary magnetic ring; a second magnetic ring 431 which can be in adsorption fit with the first magnetic ring 14 and a driving device for driving the second magnetic ring 431 to rotate are arranged in the magnetic rotating device 4; the second magnetic ring 431 is an active rotation magnetic ring, and when the driving device drives the second magnetic ring 431 to rotate, the second magnetic ring can drive the first magnetic ring 14 to rotate, so that the rotation of the stirring paddle 1 is realized.

Therefore, when the stirring paddle 1 needs to be disassembled, a user can hold the column body 12 of the stirring paddle 1 and pull out the column body, so that the stirring paddle 1 is disassembled.

Referring to fig. 3, the heating plate 3 is in a shape of a circular disc, the center thereof is provided with a first through hole 31, the bottom thereof is provided with mounting posts 32 which are uniformly distributed, and the mounting posts 32 are sleeved with elastic members 33; the heating plate 3 is fixed in the cooking utensil through a mounting column 32; one end of the elastic member 33 abuts against the bottom of the heating plate 3, and the other end abuts against the inside of the cooking appliance; this generate heat dish 3 can be because the weight of the pot body 2 moves down and can keep laminating, contradicting all the time along with the downward or upward movement of the pot body 2 under the effect of elastic component 33 when receiving the conflict of the pot body 2 to guarantee its good heat transfer effect.

In the present embodiment, the mounting post 32 is a stud; the elastic member 33 is a spring.

Referring to fig. 4-7, the magnetic rotating apparatus 4 further includes a heat shield 42 and a temperature sensing element 411, where the temperature sensing element 411 includes a T-shaped temperature sensing probe 4111 and a lead 4112 disposed at the bottom of the temperature sensing probe 4111; the heat shield 42 is used for isolating the heat of the heating plate 3 and reducing the heat conduction and radiation to parts in the magnetic rotating device 4; the heat shield 42 is disc-shaped, and the middle part of the heat shield is provided with a second step 422 and a first step 421, which have gradually reduced outer diameters, in turn, and the middle part of the first step 421 is provided with a first counter bore 4211 and a second through hole 4212 penetrating through the first counter bore 4211; the temperature sensing probe 4111 in a T shape is installed in the first counterbore 4211 and its bottom and the lead 4112 pass through the second through hole 4212. In addition, the magnetic rotating device 4 further includes a fixing sleeve 412, and the fixing sleeve 412 is sleeved on the temperature sensing probe 4111 from bottom to top and forms an interference fit so as to limit and fix the temperature sensing probe 4111 on the heat shield 42.

In this embodiment, the first step 421 of the heat shield 42 passes through the first through hole 31 of the heating plate 3 and the temperature sensing probe 4111 on the first step 421 just abuts against the bottom of the pot body 2, so as to realize real-time detection of the temperature of the pot body 2.

Of course, in other embodiments, the temperature sensing probe 4111 may be disposed on the heat generating tray 3. At this time, the first through hole 31 is not provided in the heating plate 3, but the first counterbore 4211 and the second through hole 4212 are provided in the heating plate 3, and the fixing manner is the same as the fixing manner of the temperature sensing element 411 in the heat shield 42, which is not described herein again.

Referring to fig. 6-7, a plurality of second mounting holes 424 are uniformly distributed on the heat shield 42 along the circumferential direction, a flange 423 is further disposed around the edge of the heat shield 42, and a water outlet 425 is further disposed on the heat shield 42 near the edge. In addition, a first cavity 426 with an open lower end is formed inside the heat shield 42, and the second magnetic ring 431 is located in the first cavity 426.

Referring to fig. 8-17, the magnetic rotating apparatus 4 further includes a bracket 44, the bracket 44 is in an oval disc shape, and the top surface of the bracket 44 is provided with a circular convex edge 448 and fourth mounting holes 444 uniformly distributed around the convex edge 448 in the circumferential direction, and the fourth mounting holes 444 correspond to the second mounting holes 424 on the heat shield 42. Thus, when the heat shield 42 is placed on the bracket 44, the ledge 448 of the bracket 44 can extend into the first cavity 426 and abut against the bottom side wall of the first cavity 426, and the heat shield 42 can be fixed on the bracket 44 by sequentially passing bolts through the second mounting holes 424 and the fourth mounting holes 444. In addition, the driving device of the magnetic rotating device 4 includes a motor 49 and a gear seat 46, the gear seat 46 includes a first gear 461, a second boss 462 and a first boss 463, the second boss 462 and the first boss 463 are disposed on the first gear 461, the outer diameter of the second boss 462 is gradually reduced, the bracket 44 is provided with a third through hole 441 communicated with the first cavity 426, and the first boss 463 penetrates through the third through hole 441 and extends into the first cavity 426.

Specifically, the magnetic rotating apparatus 4 further includes a shielding ring 432 disposed in the first cavity 426 and below the second magnetic ring 431, and a top surface of the shielding ring 432 is attracted to a bottom surface of the second magnetic ring 431. The top of the first boss 463 is further provided with a fourth through hole 466, the front and rear sides of the fourth through hole 466 are provided with ribs 464, and the left and right sides of the fourth through hole 466 are provided with fifth mounting holes 465. The shielding ring 432 is provided with a long groove 4321 and third mounting holes 4322 formed at two sides of the groove 4321. Thus, the groove 4321 is fitted over the rib 464, the third mounting hole 4322 is aligned with the fifth mounting hole 465, and the shielding ring 432 is fixed to the gear seat 46 by using the locking screw 434 sequentially passing through the third mounting hole 4322 and the fifth mounting hole 465.

Therefore, the shielding ring 432 and the second magnetic ring 431 are attracted to each other, and the shielding ring 432 is further installed on the gear seat 46, so that when the motor 49 drives the gear seat 46 to rotate, the shielding ring 432 and the second magnetic ring 431 are driven to rotate at the same time.

In this embodiment, the shielding ring 432 is a metal ring and has a certain thickness. The shield ring 432 shields the magnetic flux lines to prevent the magnetic flux lines from adsorbing iron objects, tableware, and the like.

Referring to fig. 11, the magnetic rotating apparatus 4 further includes a bearing 45, and the bearing 45 includes an inner circular ring 451 and an outer circular ring 452. A first mounting hole 442 which is communicated with the third through hole 441 and has a larger diameter is further formed on the bracket 44 at the outer side of the third through hole 441; the inner ring 451 of the bearing 45 is fitted over the first boss 463 of the gear seat 46 and forms an interference fit, and the bearing 45 is installed in the first installation hole 442 and the outer ring 452 thereof forms an interference fit with the inner sidewall of the first installation hole 442. In addition, a plurality of buckles 443 are uniformly distributed along the edge of the first mounting hole 442, and when the bearing 45 is mounted in the first mounting hole 442, the buckles 443 can buckle the end surface of the outer ring 452, thereby improving the mounting stability of the bearing 45.

In the present embodiment, the bearing 45 is a ball bearing.

In addition, the magnetic rotating device 4 further includes a fixing ring 433 disposed on the first boss 463, a bottom surface of the fixing ring 433 abuts against an end surface of the inner ring 451 of the bearing 45, and a top surface of the fixing ring 433 abuts against a bottom surface of the shielding ring 432.

Referring to fig. 15-17, the motor 49 includes a motor body, a power output shaft 491 provided on the motor body, and a plurality of fixing lugs 492 provided on both sides of the edge of the motor body. The second gear 48 is further provided with a sixth mounting hole 482 to be fitted around the power output shaft 491 of the motor 49, and the other end face of the second gear 48 is further provided with a rotary shaft 481 in a protruding manner.

Specifically, the bracket 44 is further provided with a first stud 446 and a second stud 447 corresponding to the fixing lug 492. Thus, mounting of the motor 49 on the bracket 44 is accomplished using bolts threaded through the mounting bosses 492 and threadedly engaged with the first and second studs 446, 447. In addition, the bracket 44 is further provided with a second counter bore 445 into which the rotating shaft 481 can extend.

Referring to fig. 14 again, the magnetic rotating device 4 further includes a positioning sleeve 47, the positioning sleeve 47 includes a first positioning sleeve 471 and a second positioning sleeve 472 both in the form of hollow cylinders, the first positioning sleeve 471 is connected to the two second positioning sleeves 472 oppositely disposed, respectively, so as to form an approximate triangle; two second positioning sleeves 472 are respectively sleeved on the two first studs 446 on the bracket 44. Thus, when the motor 49 is mounted to the bracket 44, the second positioning sleeves 472 can be fixed at the same time. In addition, a second cavity 467 is further disposed inside the gear seat 46, and the first positioning sleeve 471 extends into the second cavity 467.

In this embodiment, the sidewall of the second positioning sleeve 472 is further provided with a reinforcing rib 473 to enhance the strength of the positioning sleeve 47.

Referring to fig. 18-20, when the temperature sensing element 411 is mounted on the heat shield 42, the lead 4112 of the temperature sensing element 411 passes through the second magnetic ring 431, the shielding ring 432, the gear seat 46 and the first positioning sleeve 471 in sequence. Thus, the lead 4112 can be prevented from being worn by the gears by providing the first positioning sleeve 471.

In summary, the magnetic shaftless rotating stirring device provided by the utility model has the following beneficial effects:

when the driving device drives the second magnetic ring 431 to rotate, the first magnetic ring 14 can be driven to rotate under the mutual attraction effect of the first magnetic ring 14 and the second magnetic ring 431 so as to realize the rotation of the stirring paddle 1, thereby realizing the shaftless rotary connection between the pot body 2 and the stirring paddle 1 and ensuring the flatness and the attractiveness of the inner cavity of the pot body 2. In addition, the stirring paddle 1 can be directly detached from the pot body 2, and is simple to operate and convenient to clean.

Secondly, the temperature sensing element 411 is arranged on the heating plate 3 or the heat shield 42, so that the utilization rate of space can be improved, and the occupation of installation space can be reduced.

The technical means disclosed in the scheme of the utility model are not limited to the technical means disclosed in the above embodiments, but also include the technical means formed by 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 the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims (10)

1. The utility model provides a magnetic force does not have rotatory agitating unit of axle, its characterized in that, including the pot body, can dismantle the connection and be in the stirring rake of pot body inner chamber bottom and setting are in the magnetic force rotary device of pot body below, wherein:

a first magnetic ring is arranged in the stirring paddle, and a second magnetic ring which can be in adsorption fit with the first magnetic ring and a driving device for driving the second magnetic ring to rotate are arranged in the magnetic rotating device; when the driving device drives the second magnetic ring to rotate, the first magnetic ring can be driven to rotate, so that the rotation of the stirring paddle is realized;

the pot also comprises a temperature sensing element arranged below the pot body, and the temperature sensing element is abutted against the bottom of the pot body.

2. The stirring device as recited in claim 1, further comprising a heating plate disposed between the pot and the magnetic rotating device, wherein the temperature sensing element is disposed on the heating plate and abutted against the bottom of the pot.

3. The stirring device as recited in claim 1, further comprising a heating plate disposed between the pot body and the magnetic rotating device, wherein the magnetic rotating device further comprises a support and a heat shield mounted on the support, the heat shield is provided with a first step penetrating through the heating plate, and the temperature sensing element is disposed on the first step and abutted against the bottom of the pot body.

4. The stirring device as claimed in claim 2 or 3, wherein the bottom of the heating plate is provided with a mounting post for fixing in a cooking utensil, the mounting post is sleeved with an elastic member, one end of the elastic member abuts against the bottom of the heating plate, and the other end of the elastic member abuts against the cooking utensil;

under the elastic force of the elastic piece, the heating plate can be driven to be attached to the bottom of the pot body.

5. The stirring device of claim 3, wherein a first cavity is formed between an interior of the heat shield and the support, and the second magnetic ring is disposed within the first cavity.

6. The stirring device as recited in claim 5, further comprising a shielding ring disposed in the first cavity and below the second magnetic ring, wherein a top surface of the shielding ring is attached to a bottom surface of the second magnetic ring.

7. The stirring device as recited in claim 6, wherein the driving device includes a motor mounted on the frame and a gear assembly, the motor driving the shield ring to rotate through the gear assembly, and further driving the second magnetic ring to rotate.

8. The stirring device as recited in claim 7, wherein the gear transmission mechanism includes a gear seat rotatably connected to the support, a first gear disposed on the gear seat, and a second gear sleeved on the power output shaft of the motor and engaged with the first gear for transmission, a first boss passing through the support and extending into the first cavity is disposed on the gear seat, and the shielding ring is mounted on the first boss.

9. The stirring device of claim 8, further comprising a bearing comprising an inner ring and an outer ring, wherein:

the inner circle ring is sleeved on the first boss and forms interference fit;

the support is provided with a first mounting hole, and the bearing is mounted in the first mounting hole and the inner side wall of the outer ring and the first mounting hole form interference fit.

10. The stirring device of claim 9 further comprising a retaining ring disposed on said first boss, wherein said retaining ring has a bottom surface abutting against said inner ring of said bearing, and a top surface abutting against said bottom surface of said shield ring.

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