Food processor and motor assembly thereof

Abstract

The utility model belongs to the technical field of food processing devices, and particularly relates to a food processor and a motor assembly of the food processor. The motor assembly comprises a brushless motor and a smashing cutter, the brushless motor comprises a front end cover, a rear end cover, a stator fixed between the front end cover and the rear end cover and a rotor rotationally matched with the stator, the rotor is provided with a rotating shaft, the upper end of the rotating shaft penetrates through the front end cover to be connected with the smashing cutter, and the rotating shaft is sleeved with a ball bearing and an oil bearing. One of the ball bearing and the oil bearing is installed on the front end cover, and the other one is installed on the rear end cover. The food processor comprises the motor assembly and a cup body. Based on brushless motor driving, the concentricity between the rotating shaft and the front end cover is differentiated from the concentricity between the rotating shaft and the rear end cover through the ball bearing and the oil-retaining bearing, so that the rotating shaft can drive the crushing cutter to fluctuate up and down, the crushing cutter dynamically swings in the rotating process, and the crushing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to food processing device technical field, concretely relates to a food processor and motor assembly of food processor. BACKGROUND

[0002] Food processor is through the high speed operation of motor drive comminution knife rotation to comminution material, realize the preparation of soybean milk, fruit juice and other nutritious drinks. The motor used in the food processor is mostly brush motor, and the brush motor is large in size and has friction, sparking and vibration between the carbon brush and the commutator during driving, which is loud.

[0003] There is also a food processor driven by a brushless motor, and the brushless motor is lower in height than the brush motor and is stable in driving. Generally, the size of the food processor needs to meet the use space of the kitchen environment, and therefore the height of the brushless motor used in the food processor is usually not more than 9 cm. The existing brushless motor is generally provided with two bearings, and generally, the person skilled in the art will want the types of the two bearings to be consistent to realize uniform stress of the rotating shaft, that is, both bearings are ball bearings or both bearings are oil-containing bearings. Specifically, the patent with the publication number CN209748335U discloses an inner rotor brushless motor shell structure, which comprises a shell, an iron cover fixedly connected to the top of the inner cavity of the shell, oil-containing bearings embedded at the centers of the top and bottom of the inner cavity of the shell, and a rotating shaft movably connected to the inner cavity of the oil-containing bearing. By arranging two oil-containing bearings, the iron cover and the shell are kept in a concentric state, the oil-containing bearings are vertically and horizontally symmetrically distributed along the rotating shaft and located on the same vertical plane as the iron cover, the position deviation of the oil-containing bearings and the rotating shaft is avoided to cause mutual interference, and the top and bottom of the rotating shaft can be uniformly stressed and rotated.

[0004] However, the applicant found in the research process that although the two bearings of the brushless motor are of the same type, the concentricity of the rotating shaft is effectively improved and the noise is small, but in the processing scene of the food processor, the rotation of the rotating shaft drives the comminution knife to rotate in a relatively stable comminution area. The limited size of the comminution knife will form a limited comminution area, especially based on the low height of the brushless motor, the rotation of the comminution knife driven by the rotating shaft will make the comminution area too stable, which is not conducive to the improvement of the comminution efficiency, and there is a problem of low comminution efficiency. Moreover, when two ball bearings are used, although the rotating friction resistance is smaller than that of the oil-containing bearing and the running speed is faster, a sharp friction noise will be generated compared with the oil-containing bearing, the user experience is poor, and the purchase cost is high. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of food processor and the motor assembly of food processor, based on brushless motor drive, under the premise of not increasing noise, solve the problem that the low problem of the commutating shaft in prior art is caused by the too stable crushing area formed by driving the crushing knife to rotate.

[0006] The utility model employs the technical scheme as follows: the utility model provides a kind of motor assembly of food processor, including brushless motor and crushing knife, the brushless motor includes front end cover, rear end cover, fixed in the stator between front end cover and rear end cover, the rotor that is rotationally cooperated with stator, the rotor is equipped with shaft, the upper end of the shaft passes through the front end cover and is connected with the crushing knife, the shaft sleeve is connected with a ball bearing and an oil-containing bearing, one of the ball bearing and the oil-containing bearing is installed on the front end cover, and the other is installed on the rear end cover.

[0007] The utility model provides a kind of motor assembly of food processor, by the sleeve connection of a ball bearing and an oil-containing bearing on the shaft, and one of the ball bearing and the oil-containing bearing is installed on the front end cover, and the other is installed on the rear end cover, the self-aligning difference of two types of bearings, so that the difference of the concentricity between the shaft and the front end cover and the concentricity between the shaft and the rear end cover is made, so that the shaft can have up and down fluctuation driving the crushing knife, dynamic swing is formed during the rotation of the crushing knife, plays the effect of turbulence, increases the collision probability with material, improves the crushing efficiency, and realizes crushing quickly.Certainly, since the utility model is based on brushless motor drive, the brushless motor includes front end cover, rear end cover, fixed in the stator between front end cover and rear end cover, the rotor that is rotationally cooperated with stator, the rotor is equipped with shaft, and the shaft is connected with the crushing knife, therefore, the height of brushless motor is determined by front end cover and rear end cover, and the height of brushless motor is lower than that of brush motor, the spacing between the sleeve connection of ball bearing and oil-containing bearing on the shaft is small by using the low height attribute of the structure of brushless motor itself, so that, even if the upper end of the shaft fluctuates due to the difference of the concentricity of the two different types of bearings, under the limiting effect of front end cover and rear end cover, the shaft swings within reasonable range, so as to avoid the increase of noise.In summary, the motor assembly provided by the utility model can drive the crushing knife to form fluctuation under the premise of realizing low-noise drive, to expand the fluctuation of crushing area and improve the crushing efficiency.

[0008] In a preferred embodiment, the ball bearing is installed on the front end cover, and the oil-containing bearing is installed on the rear end cover, so that the ball bearing is arranged closer to the crushing knife than the oil-containing bearing.

[0009] The ball bearing is installed on the front end cover, and the oil bearing is installed on the rear end cover, so that the ball bearing is arranged close to the crushing knife compared with the oil bearing, that is, the ball bearing is arranged close to the end with larger load, so that the driving resistance is small during driving the crushing knife to rotate, the noise is reduced, the oil bearing is arranged close to the end with smaller load of the rotating shaft, the heat generation is reduced, and the service life is prolonged.

[0010] In a preferred embodiment, the thickness d1 of the ball bearing and the distance d2 between the front end face of the ball bearing and the rear end face of the oil bearing satisfy 1:13≤d1:d2≤1:6.

[0011] By satisfying 1:13≤d1:d2≤1:6, the eccentricity of the rotating shaft is not too small, and the crushing knife can be driven more effectively, so that the disturbance effect on the material is improved, the crushing efficiency is improved, and the heat generation of the oil bearing or the ball bearing due to the excessive eccentricity of the rotating shaft is avoided, and the service life is affected.

[0012] In a preferred embodiment, the oil bearing comprises an inner ring fixedly sleeved on the rotating shaft and an outer ring matched with the inner ring, the outer ring is fixed on the rear end cover or the front end cover, and the outer side surface of the inner ring is a spherical surface arched toward the outer ring.

[0013] By setting the outer side surface of the inner ring of the oil bearing as a spherical surface arched toward the outer ring, on the one hand, the spherical surface has the function of automatic alignment, controls the concentricity between the rotating shaft and the front end cover or the rear end cover, and also makes the rotating shaft have axial fluctuation, so that the disturbance effect of the crushing knife is improved; on the other hand, the cooperation between the inner ring and the outer ring of the oil bearing is more smooth, so that the rotation is smooth, the friction heat generation is reduced, and the service life is prolonged.

[0014] In a preferred embodiment, the outer periphery of the rotating shaft is provided with a first limiting protrusion and a second limiting protrusion extending radially outward, and the ball bearing is axially limited between the first limiting protrusion and the second limiting protrusion.

[0015] More preferably, the first limiting protrusion is a boss integrally formed on the rotating shaft.

[0016] Alternatively, the second limiting protrusion is a snap spring sleeved on the outer periphery of the rotating shaft, and the rotating shaft is provided with a clamping groove for installing the snap spring.

[0017] Alternatively, the second limiting protrusion is a bushing sleeved on the outer periphery of the rotating shaft.

[0018] By setting the first limiting protrusion and the second limiting protrusion on the outer periphery of the rotating shaft, the ball bearing is reliably limited axially between the first limiting protrusion and the second limiting protrusion, reliable limiting between the ball bearing and the rotating shaft is realized, the ball bearing is prevented from falling or shifting, and the rotation of the rotating shaft is smooth. The limiting protrusion structures such as the boss, the snap spring, and the bushing are adopted, the installation between the rotating shaft and the ball bearing is facilitated, and the limiting reliability is improved.

[0019] In a preferred embodiment, the front end cover is provided with a first installation groove for installing the ball bearing, and the rear end cover is provided with a second installation groove for installing the oil-impregnated bearing, so that the maximum radial runout of the rotating shaft at the oil-impregnated bearing is less than the maximum radial runout at the ball bearing.

[0020] By setting the first installation groove on the front end cover and the second installation groove on the rear end cover, the ball bearing and the oil-impregnated bearing can be reliably positioned, and the maximum radial runout of the rotating shaft at the oil-impregnated bearing is less than the maximum radial runout at the ball bearing. For the oil-impregnated bearing with a relatively large amount of heat, the maximum radial runout of the rotating shaft at the position is controlled to be less than that of the ball bearing with a relatively small amount of heat, thereby prolonging the service life of the oil-impregnated bearing and the ball bearing, and improving the structural reliability and the service life of the motor assembly.

[0021] More preferably, the ball bearing is interference-fitted in the first installation groove.

[0022] Alternatively, a glue solution is poured into the second installation groove to form a glue pouring layer, and the oil-impregnated bearing is fixed in the second installation groove through the glue pouring layer.

[0023] The ball bearing is interference-fitted in the first installation groove, the installation is convenient, the assembly efficiency is high, and the installation cost is low. The oil-impregnated bearing is fixed by pouring glue to form a glue pouring layer, the assembly is convenient, and the fixing is reliable.

[0024] In a preferred embodiment, the oil-impregnated bearing is installed on the front end cover, and the ball bearing is installed on the rear end cover, so that the oil-impregnated bearing is arranged closer to the crushing knife than the ball bearing.

[0025] By installing the oil-impregnated bearing on the front end cover and the ball bearing on the rear end cover, the oil-impregnated bearing is arranged closer to the crushing knife than the ball bearing. Therefore, for the end of the rotating shaft with a larger load, the oil-impregnated bearing is arranged, and the sharp driving noise of the ball bearing is avoided. The ball bearing is arranged at the end with a smaller load, and the service life is prolonged.

[0026] In a preferred embodiment, a heating pipe is fixed on the lower side of the front end cover.

[0027] The heating pipe is fixedly arranged on the lower side of the front end cover, so that the motor assembly is integrated with the heating function, and when applied to the food processor, the front end cover can directly form a heating disc matched with the cup body, thereby further reducing the overall height and being compact in structure.

[0028] The utility model also provides a food processor, including cup body and above -mentioned motor assembly, the brushless motor is fixed at the bottom of cup body, the comminution knife is located in cup body.

[0029] The food processor provided by the utility model has the advantages that the brushless motor is driven, the effects of low noise and low overall height are realized, axial fluctuation is realized when the rotating shaft drives the comminution knife to cut materials, the collision probability with food is improved, the comminution efficiency is improved, the swing of the rotating shaft is controlled within a reasonable range based on the low height of the brushless motor, the swing noise of the rotating shaft is not increased, and the structure is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0031] Figure 1 It is a structure schematic view of the motor assembly in one embodiment of the utility model;

[0032] Figure 2 It is a structure schematic view of the oil bearing in one embodiment of the utility model;

[0033] Figure 3 It is a structure schematic view of the oil bearing in another embodiment of the utility model;

[0034] Figure 4 It is a cooperation schematic view of the ball bearing and the rotating shaft in one embodiment of the utility model;

[0035] Figure 5 It is a cooperation schematic view of the ball bearing and the rotating shaft in another embodiment of the utility model;

[0036] Figure 6 It is a cooperation schematic view of the ball bearing and the rotating shaft in another embodiment of the utility model;

[0037] Figure 7 It is a structure schematic view of the motor assembly in another embodiment of the utility model.

[0038] 10, front end cover; 11, heating pipe; 20, rear end cover; 30, stator; 40, rotor; 41, rotating shaft; 50, ball bearing; 60, oil bearing; 61, inner ring; 62, outer ring; 70, crushing knife; 81, first mounting groove; 82, second mounting groove; 91, first limiting protrusion; 92, second limiting protrusion. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail in conjunction with the accompanying drawings.

[0040] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in each embodiment can be combined with each other.

[0041] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0044] As shown in Figure 1 , 2 The utility model provides a motor assembly of food processor, including brushless motor and comminution knife 70, brushless motor includes front end cover 10, rear end cover 20, fixed in the stator 30 between front end cover 10 and rear end cover 20, with the rotation cooperation of stator 30's rotor 40, rotor 40 is equipped with the shaft 41, the upper end of shaft 41 passes through front end cover 10 and is connected with comminution knife 70, and the shaft 41 is sleeved with a ball bearing 50 and an oil bearing 60, and one of ball bearing 50 and oil bearing 60 is installed on front end cover 10, and the other is installed on rear end cover 20.

[0045] The utility model provides a kind of motor assembly of food processor, by being sleeved with a ball bearing 50 and an oil bearing 60 on the shaft 41, and one of ball bearing 50 and oil bearing 60 is installed in front end cover 10, the other of two is installed in rear end cover 20, the bearing of two types difference exists self-aligning difference, to make the concentricity between the shaft 41 and front end cover 10 and the concentricity between the shaft 41 and rear end cover 20 difference, so that the shaft 41 can have up and down fluctuation with comminuting knife 70, dynamic swing is formed in the rotation process of comminuting knife 70, play turbulence effect, increase the collision probability with material, improve comminution efficiency, quickly realize comminution.Of course, since the utility model is based on brushless motor drive, brushless motor includes front end cover 10, rear end cover 20, stator 30 fixed between front end cover 10 and rear end cover 20, the rotation cooperation of rotor 40 with stator 30, rotor 40 is equipped with shaft 41, and shaft 41 is connected with comminuting knife 70, therefore, front end cover 10 and rear end cover 20 determine the height of brushless motor, and brushless motor has lower height compared with brush motor, utilizes the low height attribute of the structure of brushless motor itself, and the spacing between the ball bearing 50 and the oil bearing 60 of the shaft 41 is small, so, even if the upper end of the shaft 41 is different due to the realization of the concentricity of the two different types of bearings, under the limiting action of front end cover 10 and rear end cover 20, the shaft 41 swings within reasonable range, to avoid the increase of noise.Summarizing above, the motor assembly provided by the utility model can form fluctuation with comminuting knife 70 under the premise of realizing low-noise drive, to expand the fluctuation of comminution area and improve comminution efficiency.

[0046] It should be noted that the utility model does not limit the specific installation position of ball bearing and oil bearing, in one preferred embodiment, as shown in Figure 1 Ball bearing 50 is installed in front end cover 10, and oil bearing 60 is installed in rear end cover 20, so that ball bearing 50 is arranged close to comminuting knife 70 compared with oil bearing 60.

[0047] Since the rotation between the inner and outer rings 62 of ball bearing 50 is more smooth compared with oil bearing 60, the rotation resistance of shaft 41 is small, and the rotation is smooth, therefore, by installing ball bearing 50 in front end cover 10 and oil bearing 60 in rear end cover 20, ball bearing 50 is arranged close to comminuting knife 70 compared with oil bearing 60, that is, ball bearing 50 is arranged close to the end with larger load, so that the driving resistance is small in the process of driving comminuting knife 70 to rotate, the noise is reduced, and oil bearing 60 is arranged close to the end with small load of shaft 41, the heat generation is reduced, and the service life is prolonged.

[0048] Of course, in other embodiments, the oil-impregnated bearing 60 is mounted to the front end cover 10, and the ball bearing 50 is mounted to the rear end cover 20, so that the oil-impregnated bearing 60 is arranged closer to the shredding knife 70 than the ball bearing 50.

[0049] By mounting the oil-impregnated bearing 60 to the front end cover 10 and the ball bearing 50 to the rear end cover 20, so that the oil-impregnated bearing 60 is arranged closer to the shredding knife 70 than the ball bearing 50, for the end of the shaft 41 with a larger load, the oil-impregnated bearing 60 is provided, avoiding the sharp driving noise of the ball bearing 50, and the ball bearing 50 is arranged at the end with a smaller load, prolonging the service life.

[0050] In a preferred embodiment of the utility model, as shown in Figure 1 The thickness d1 of the ball bearing 50 and the distance d2 between the front end face of the ball bearing 50 and the rear end face of the oil-impregnated bearing 60 satisfy: 1:13≤d1:d2≤1:6.

[0051] By satisfying 1:13≤d1:d2≤1:6, the shaft 41 is not too small, but can more effectively drive the fluctuation of the shredding knife 70, thereby improving the disturbance effect on the material and improving the shredding efficiency, and also avoiding excessive heat of the oil-impregnated bearing 60 or the ball bearing 50 due to excessive deflection of the shaft 41, affecting the service life.

[0052] In a preferred embodiment, the distance L between the front end face of the front end cover and the rear end face of the rear end cover satisfies: 40mm≤L≤100mm, avoiding that the distance L is too large to cause the brushless motor to be too high, increasing noise and occupying space, and also avoiding that the distance is too small, the load is too small, and the improvement of the shredding effect is not obvious.

[0053] For example, in a specific embodiment, the thickness d1 of the ball bearing 50 is 7mm, d2 is 45mm, and d1:d2=1:6.4. Among them, the ball bearing specification is 608, the maximum radial inclination distance of the shaft at the ball bearing is 0.08mm, and the shaft has a maximum deflection of 0.05mm relative to the center line at the oil-impregnated bearing.

[0054] Preferably, the outer diameter of the outer ring of the oil-impregnated bearing is 13-19mm, the inner diameter of the inner cavity is 6-10mm, and the maximum inclination deflection of the oil-impregnated bearing that can withstand the shaft is 0.1mm. Through experiments, the oil-impregnated bearing provided in the embodiment can prevent excessive deflection from causing the shaft and the inner ring of the oil-impregnated bearing to increase the friction force, the bearing to heat beyond the limit, and the service life of the bearing to be greatly shortened.

[0055] In a preferred embodiment, as shown in Figure 2As shown, the oil-impregnated bearing 60 comprises an inner ring 61 fixedly sleeved on the rotating shaft 41 and an outer ring 62 matched with the inner ring 61, the outer ring 62 is fixed on the rear end cover 20 or the front end cover 10, and the outer side surface of the inner ring 61 is a spherical surface arched towards the outer ring 62.

[0056] By setting the outer side surface of the inner ring 61 of the oil-impregnated bearing 60 as a spherical surface arched towards the outer ring 62, on the one hand, the spherical surface has the self-aligning effect, controls the concentricity between the rotating shaft 41 and the front end cover 10 or the rear end cover 20, and at the same time, makes the rotation of the rotating shaft 41 have axial fluctuation, thereby improving the turbulence effect of the crushing knife 70; on the other hand, makes the cooperation between the inner ring 61 and the outer ring 62 of the oil-impregnated bearing 60 more smooth, thereby improving the rotation smoothness, reducing the friction heat, and prolonging the service life.

[0057] In fact, the oil-impregnated bearing can also adopt a cylindrical bearing, that is, as shown in the prior art, Figure 3 The inner ring 61 and the outer ring 62 of the oil-impregnated bearing are both cylindrical.

[0058] In a preferred embodiment, referring to Figure 1 As shown, the front end cover 10 is provided with a first mounting groove 81 for mounting the ball bearing 50, and the rear end cover 20 is provided with a second mounting groove 82 for mounting the oil-impregnated bearing 60, so that the maximum radial runout of the rotating shaft 41 at the oil-impregnated bearing 60 is less than the maximum radial runout at the ball bearing 50.

[0059] By setting the first mounting groove 81 on the front end cover 10 and the second mounting groove 82 on the rear end cover 20, the ball bearing 50 and the oil-impregnated bearing 60 can be reliably positioned, and at the same time, the maximum radial runout of the rotating shaft 41 at the oil-impregnated bearing 60 is less than the maximum radial runout at the ball bearing 50, for the oil-impregnated bearing 60 with relatively large heat, the maximum radial runout of the rotating shaft 41 at the position of the oil-impregnated bearing 60 is controlled to be less than that of the ball bearing 50 with relatively small heat, thereby prolonging the service life of the oil-impregnated bearing 60 and the ball bearing 50, making the structure of the motor assembly reliable and the service life long.

[0060] More preferably, the ball bearing 50 is interference press-fitted in the first mounting groove 81;

[0061] More preferably, the second mounting groove 82 is filled with glue solution to form a glue filling layer, and the oil-impregnated bearing 60 is fixed in the second mounting groove 82 through the glue filling layer.

[0062] The ball bearing 50 is interference press-fitted in the first mounting groove 81, which is convenient to install, high in assembly efficiency, and low in installation cost. The oil-impregnated bearing 60 is fixed by the glue filling layer formed by glue filling, which is convenient to assemble and reliable in fixation.

[0063] The utility model discloses to the axial location mode between the ball bearing or oil bearing and the rotating shaft is not limited, and taking the ball bearing as an example, in a preferred embodiment, as shown in the figure, Figure 4 The outer periphery of the rotating shaft 41 is provided with the first limiting protrusion 91 and the second limiting protrusion 92 extending radially outward, and the ball bearing 50 is axially limited between the first limiting protrusion 91 and the second limiting protrusion 92, and specifically, as shown in the figure, Figure 4 The first limiting protrusion 91 and the second limiting protrusion 92 are both clamping springs. More preferably, the rotating shaft 41 is provided with a clamping groove for mounting the clamping spring.

[0064] As shown in the figure, Figure 5 In another preferred embodiment, the first limiting protrusion 91 is a boss or a step integrally formed on the rotating shaft 41, the second limiting protrusion 92 is a clamping spring sleeved on the outer periphery of the rotating shaft 41, and the rotating shaft 41 is provided with a clamping groove for mounting the clamping spring.

[0065] As shown in the figure, Figure 6 In another preferred embodiment, the first limiting protrusion 91 is a clamping spring, and the second limiting protrusion 92 is a bushing sleeved on the outer periphery of the rotating shaft 41.

[0066] By providing the first limiting protrusion 91 and the second limiting protrusion 92 on the outer periphery of the rotating shaft 41, the ball bearing 50 is axially reliably limited between the first limiting protrusion 91 and the second limiting protrusion 92, realizing reliable limiting between the ball bearing 50 and the rotating shaft 41, avoiding the ball bearing 50 from falling or shifting, and making the rotation of the rotating shaft 41 smooth. The boss, clamping spring, bushing and other limiting protrusion structures facilitate the installation between the rotating shaft 41 and the ball bearing 50, and improve the limiting reliability.

[0067] It can be understood that the axial limiting between the oil bearing 60 and the rotating shaft can still adopt the above-mentioned mode.

[0068] In a preferred embodiment, as shown in the figure, Figure 7 The lower side of the front end cover 10 is fixedly provided with a heating pipe 11.

[0069] By fixedly arranging the heating pipe 11 on the lower side of the front end cover 10, the motor assembly integrates the heating function, and when applied to the food processor, the front end cover 10 can directly form a heating disc matched with the cup body, thereby further reducing the overall height and being compact in structure.

[0070] It can be understood that in the utility model, the crushing knife and the brushless motor can be selected to be fixedly connected or detachably connected, and for the structure of the front end cover integrating the heating pipe, the crushing knife can be directly fixed to the rotating shaft, and the front end cover closes the bottom of the cup to form a cup bottom wall that can be heated.

[0071] The utility model discloses in one embodiment still provide a kind of food processor, including cup body and above-mentioned motor assembly, brushless motor is fixed in the bottom of cup body, and the comminution knife 70 is located in cup body.

[0072] Specifically, the food processor is a hand-washing-free food processor, comprising a main machine, the main machine is provided with a mounting cavity, the cup body is fixedly or detachably mounted in the mounting cavity, and the brushless motor is fixedly or detachably mounted in the main machine.

[0073] Of course, in other embodiments, the food processor is a wall-breaking machine, comprising a base, the cup body is detachably mounted above the base, and the brushless motor is fixed in the base.

[0074] Alternatively, in other embodiments, the food processor is a head-type soybean milk machine, comprising a head and a cup body, the head is covered above the cup body, the brushless motor is mounted in the head, and the rotating shaft 41 of the brushless motor extends through the head and is fixedly connected with the comminution knife 70.

[0075] The food processor provided by the utility model comprises the motor assembly, so that the brushless motor is used for driving, the effects of low noise and low height of the whole machine are realized, axial fluctuation is realized when the rotating shaft 41 drives the comminution knife 70 to cut materials, the collision probability with food is improved, the comminution efficiency is improved, the rotating shaft 41 can be controlled within a reasonable range based on the brushless motor with low height, so that the rotating noise of the rotating shaft 41 is not increased, and the structure is reliable.

[0076] In the utility model, the parts not described are realized by using or referring to the existing technology.

[0077] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0078] The above is only an embodiment of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the claim range of the utility model.

Claims

1. A motor assembly for a food processor comprising a brushless motor and a pulverizing blade, characterized in that, The brushless motor comprises a front end cover, a rear end cover, a stator fixed between the front end cover and the rear end cover, and a rotor in rotational cooperation with the stator, wherein the rotor is provided with a rotating shaft, the upper end of the rotating shaft is connected with the crushing knife, a ball bearing and an oil-containing bearing are sleeved on the rotating shaft, one of the ball bearing and the oil-containing bearing is installed on the front end cover, and the other is installed on the rear end cover.

2. A motor assembly for a food processor according to claim 1, wherein, The ball bearing is installed on the front end cover, and the oil-containing bearing is installed on the rear end cover, so that the ball bearing is arranged closer to the crushing knife than the oil-containing bearing.

3. A motor assembly for a food processor according to claim 1, wherein, The thickness d1 of the ball bearing and the distance d2 between the front end face of the ball bearing and the rear end face of the oil-containing bearing satisfy 1:13≤d1:d2≤1:

6.

4. A food processor motor assembly according to claim 1, wherein, The oil-containing bearing comprises an inner ring fixedly sleeved on the rotating shaft and an outer ring in cooperation with the inner ring, the outer ring is fixed on the rear end cover or the front end cover, and the outer side face of the inner ring is a spherical face arched towards the outer ring.

5. A food processor motor assembly according to claim 1 wherein, The outer periphery of the rotating shaft is provided with a first limiting protrusion and a second limiting protrusion extending radially outward, and the ball bearing is axially limited between the first limiting protrusion and the second limiting protrusion.

6. A food processor motor assembly according to claim 5, wherein, The first limiting protrusion is a boss integrally formed on the rotating shaft. Alternatively, the second limiting protrusion is a snap spring sleeved on the outer periphery of the rotating shaft, and the rotating shaft is provided with a clamping groove for installing the snap spring. Alternatively, the second limiting protrusion is a bushing sleeved on the outer periphery of the rotating shaft.

7. A motor assembly for a food processor according to claim 1, wherein, The front end cover is provided with a first installation groove for installing the ball bearing, and the rear end cover is provided with a second installation groove for installing the oil-containing bearing, so that the maximum radial runout of the rotating shaft at the oil-containing bearing is smaller than the maximum radial runout of the rotating shaft at the ball bearing.

8. A food processor motor assembly according to claim 7, wherein, The ball bearing is interference-pressed in the first installation groove. Alternatively, a glue layer is formed by pouring glue into the second installation groove, and the oil-containing bearing is fixed in the second installation groove through the glue layer.

9. A food processor motor assembly according to claim 1 wherein, The oil-containing bearing is installed on the front end cover, and the ball bearing is installed on the rear end cover, so that the oil-containing bearing is arranged closer to the crushing knife than the ball bearing. Alternatively, a heating pipe is fixedly arranged on the lower side of the front end cover.

10. A food processor characterised in that, The cup body and the motor assembly according to any one of claims 1-9 are provided, the brushless motor is fixed on the bottom of the cup body, and the crushing knife is located in the cup body.

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