CN210902703U - Frame subassembly and food processor - Google Patents

Abstract

The utility model discloses a machine base component and a food processor, relating to the technical field of domestic electric appliances, comprising a machine base shell, a motor, a fan, a motor cover and a fan cover; the frame shell is equipped with air intake and air outlet, the motor cover is located in the frame shell, inject the air inlet wind channel with the air intake intercommunication between motor cover and the frame shell, the motor holding is in the motor cover, the fan holding is in the fan casing, fan casing and motor cover link to each other and inject the air-out wind channel with the air outlet intercommunication jointly, the motor cover includes the upper shield body and covers the body down, set up the vent that communicates air inlet wind channel and air-out wind channel on the upper shield body, cover down respectively with the upper shield body and fan cover sealing connection. The utility model discloses a food processor, frame subassembly adopt sealing connection's motor cover and fan cover to wrap up motor and fan completely, make motor cover and fan cover form the cavity of high leakproofness jointly, can effectively reduce the outside radiation noise of motor and fan, reduce food processor's noise at work.

Description

Frame subassembly and food processor

Technical Field

The utility model relates to a life electrical apparatus technical field, in particular to frame subassembly and food processor.

Background

In the use process of the food processor, a motor in the base can generate large vibration noise. Food processor of prior art adopts the motor cover to carry out the sound insulation to the motor usually, and traditional motor cover structure only wraps up the partial structure of motor in order to satisfy the heat dissipation needs of motor, can not avoid the motor to the external radiation noise, therefore the sound insulation effect is relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a frame subassembly and food processor, can further reduce the noise of during operation.

According to a first aspect of the present invention, there is provided a housing assembly, comprising

The engine base shell is provided with an air inlet and an air outlet;

the motor cover is arranged in the base shell, and an air inlet duct communicated with the air inlet is defined between the motor cover and the base shell;

the fan cover is arranged below the motor cover, and the fan cover and the motor cover are connected and jointly define an air outlet duct communicated with the air outlet;

the motor is accommodated in the motor cover, and a fan accommodated in the fan cover is connected below the motor;

the motor cover comprises an upper cover body and a lower cover body, a ventilation opening communicated with the air inlet duct and the air outlet duct is formed in the upper cover body, and the lower cover body is respectively connected with the upper cover body and the fan cover in a sealing mode.

Has the advantages that: the motor and the fan are completely wrapped by the base assembly through the upper cover body, the lower cover body and the fan cover which are connected in a sealing manner, so that a high-sealing cavity is formed by the motor cover and the fan cover together, the outward radiation noise of the motor and the fan can be effectively reduced, and the working noise of the food processor is reduced; and, inject the air inlet duct between frame shell and the motor cover, fan housing and motor cover link to each other and inject the air outlet duct jointly, and air inlet duct and air outlet duct are independent each other and the leakproofness is good, and two wind channels have only been through the vent intercommunication of seting up on the upper cover body, have optimized the route in wind channel, have improved the radiating efficiency of wind channel to the motor.

According to the utility model discloses the first aspect, fan housing bottom downwardly extending is equipped with the leg, the diapire of fan housing the leg with frame shell bottom encloses to close and forms first anechoic chamber.

According to the first aspect of the present invention, the lower cover body includes an upper edge portion, a lower edge portion, an outer peripheral portion, and an inner peripheral portion; at least part of the upper edge part and at least part of the lower edge part, and the outer peripheral part and the inner peripheral part are encircled to form a second silencing cavity.

According to the utility model discloses the first aspect, frame shell top is equipped with the installation pillar, the motor have with installation pillar matched with connecting portion, connecting portion are located first mounting hole has been seted up in the upper shield body, the second mounting hole has been seted up to the upper shield body, the installation pillar from the top down wears to locate in proper order the second mounting hole with first mounting hole and fixed connection in the lower shield body.

According to the utility model discloses the first aspect, the cover is equipped with first packing ring on the installation pillar, first packing ring along the axial seted up with installation pillar complex centre bore, first packing ring wears to locate first mounting hole, just the one end of first packing ring with upper shield body butt, the other end of first packing ring with lower cover body butt.

According to the utility model discloses the first aspect, the upper end of first packing ring is equipped with first boss, and the lower extreme is equipped with the second boss, first boss clamp is located the upper cover body with between the connecting portion, the second boss clamp is located the lower cover body with between the connecting portion.

According to the utility model discloses in the first aspect, first boss or be equipped with the elasticity chamber in the second boss.

According to the utility model discloses the first aspect, the lower cover body include with second boss butt complex goes up the portion of following, it is equipped with the arch to go up the portion of following upwards protrusion, the second boss inwards sunken be equipped with protruding matched with recess.

According to the utility model discloses the first aspect, the installation pillar include with the first cylinder that the frame shell links to each other and with the second cylinder that first cylinder links to each other, the cover is equipped with the second packing ring on the second cylinder, the second packing ring is worn to locate the second mounting hole, the upper end clamp of second packing ring is located the upper cover body with between the first cylinder.

According to the first aspect of the present invention, the connecting portion is disposed around the periphery of the motor, the first mounting holes include at least four, and at least four of the first mounting holes are uniformly distributed along the circumferential direction of the connecting portion;

or the periphery interval of motor is equipped with four at least connecting portion, four at least connecting portion are followed the circumference equipartition of motor, each connecting portion correspond and seted up one first mounting hole.

According to the utility model discloses the first aspect, the air intake with the air outlet is located respectively the diapire of frame shell.

According to the utility model discloses a second aspect provides a food processor, including above arbitrary frame subassembly.

Has the advantages that: food processor adopts foretell chassis subassembly, has reduced the outside radiant quantity of noise of motor and fan, has further reduced the noise of during operation, has improved user experience.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

fig. 1 is a perspective view of a food processor according to an embodiment of the present invention;

fig. 2 is a perspective view of a base assembly according to an embodiment of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

figure 5 is a perspective cutaway view of the cross-section a-a of figure 4;

FIG. 6 is a perspective cross-sectional view of section B-B of FIG. 4;

FIG. 7 is a cross-sectional view of section C-C of FIG. 4;

FIG. 8 is an enlarged view taken at D in FIG. 7;

FIG. 9 is a cross-sectional view of the first gasket of FIG. 2;

fig. 10 is a top view of the fan housing of fig. 2.

Reference numerals:

a stand assembly 10; a coupling 11;

a base housing 100; an air inlet 110; an air outlet 120; a grid structure 121; an air intake duct 130; a mounting post 140; the third mounting hole 141; a first cylinder 142; a second post 143; a retaining member 150;

a motor 200; a fan 210; a connecting portion 220; a first mounting hole 221;

a motor cover 300; an air outlet duct 310; a vent 320; a second muffling chamber 330; an upper edge portion 331; a fourth mounting hole 3311; protrusions 3312; the lower edge portion 332; an outer peripheral portion 333; an inner peripheral portion 334; micro-perforations 335; an upper cover body 350; the third gasket 351; a tapered boss 352; the second mounting holes 354; a lower cover 360; a first gasket 361;

a fan cover 400; a second gasket 410; a surrounding wall 420; a first muffling chamber 430;

a first gasket 500; a central aperture 510; a first boss 520; a second boss 530; a groove 531; a flexible chamber 540; and a second gasket 550.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the utility model relates to a food processor of embodiment can be broken wall machine, mixer, juice extractor or soybean milk machine etc. and it includes frame subassembly 10 and cup 20, and cup 20 is used for the food that the holding needs cooking processing, and cup 20's axle center is equipped with blade (not shown in the figure) on just being located the position of bottom, and it is shown with reference to fig. 2, and frame subassembly 10 provides power for the blade through shaft coupling 11 to the cooking processing to food is realized.

Referring to fig. 3, 4 and 5, a base assembly 10 according to an embodiment of the present invention includes a base housing 100, a motor 200, a motor cover 300 and a fan cover 400. The motor cover 300 is disposed in the base housing 100, the fan 210 is connected to the lower side of the motor 200, the motor 200 is mounted in the base housing 100 and completely received in the motor cover 300, and the fan 210 is completely received in the fan cover 400. It can be understood that the motor cover 300 is connected to the fan cover 400 and used for sealing and wrapping noise sources such as the motor 200 and the fan 210, the sealing performance is good, the cross-sectional area of a noise transmission channel of the motor 200 and the fan 210 can be effectively reduced, the sound insulation amount is increased, the outward radiation amount of the noise of the motor 200 and the fan 210 is reduced, and the working noise of the food processor is further reduced. Referring to fig. 3, 4, 5 and 6, the base housing 100 is provided with an inlet 110 and an outlet 120, an inlet duct 130 communicating with the inlet 110 is defined between the motor cover 300 and the base housing 100, and the motor cover 300 and the fan cover 400 are connected to define an outlet duct 310 communicating with the outlet 120. It should be noted that the air inlet duct 130 is formed by a space enclosed by the inner wall of the engine base housing 100 and the outer wall of the motor cover 300, the air outlet duct 310 is formed by communicating the inner chamber of the motor cover 300 and the inner chamber of the fan cover 400, the air inlet duct 130 and the air outlet duct 310 are independent of each other and have good sealing performance, so that mutual interference is avoided, and no cross wind phenomenon occurs. It should be further noted that the motor cover 300 includes an upper cover body 350 and a lower cover body 360, a vent 320 communicating the air inlet duct 130 and the air outlet duct 310 is provided on the upper cover body 350, the lower cover body 360 is respectively connected with the upper cover body 350 and the fan cover 400 in a sealing manner, the upper cover body 350, the lower cover body 360 and the fan cover 400 together form a structure for hermetically wrapping the motor 200 and the fan 210, the motor 200 and the fan 210 are located on the air outlet duct 310, the air inlet duct 130 and the air outlet duct 310 are communicated through the vent 320 and guide air, the air guide area of the air inlet duct 130 is large, the air guide speed is high, so that cold air entering from the air inlet 110 can be blown into the motor 200 through the vent 320 quickly to dissipate heat; moreover, the plurality of groups of the ventilation openings 320 can be arranged along the peripheral wall of the upper cover body, and the plurality of groups of the ventilation openings 320 can realize an omnidirectional air guiding effect, so that cold air can act on the motor 200 omnidirectionally, the paths of the air inlet duct 130 and the air outlet duct 310 are further optimized, the heat dissipation efficiency of the motor 200 is improved, and the power consumption of the motor 200 is reduced. Furthermore, in the present embodiment, the ventilation opening 320 is disposed at a coil portion (not shown in the figure) of the motor 200 with a harsh temperature rise requirement, so that cold air entering the air inlet duct 130 can pass through the motor 200 from top to bottom in the air outlet duct 310 for heat dissipation, thereby maximizing the utilization efficiency of the fan 210, further improving the heat dissipation efficiency, guiding heat to be rapidly discharged from the air outlet duct 310, and avoiding overheating of the motor 200.

Referring to fig. 2, 4, 5 and 6, the air inlet 110 and the air outlet 120 are respectively disposed on the bottom wall of the base housing 100, the ventilation opening 320 is disposed on the peripheral wall of the upper cover 350 near the top, so that the air inlet duct 130 and the air outlet duct 310 form a channel penetrating the base housing 100 from top to bottom, and the air inlet 110 and the air outlet 120 are staggered along the circumference of the base housing 100, so that the air inlet 110 and the air outlet 120 are independent of each other, thereby preventing the air flow of the air inlet 110 and the air flow of the air outlet 120 from interfering with each other, and improving the heat dissipation efficiency. Furthermore, the air inlets 110 are symmetrically arranged along the center of the engine base shell 100, and the air outlets 120 are arranged along the circumferential direction of the engine base shell 100 at 90 degrees in a staggered manner with the air inlets 110, so that air inlets are formed at the left and right sides of the bottom wall of the engine base shell 100, and the air outlet state at the front side increases the air inlet amount, improves the air inlet efficiency, and simultaneously avoids the mutual interference between the air inlets 110 and the air outlets 120 to the maximum extent, and improves the heat dissipation efficiency. Moreover, the air outlet 120 is disposed on the bottom wall of the housing 100 to prevent hot air from directly blowing to the user, which may affect user experience.

Referring to fig. 5, a surrounding wall 420 extends downwards from the bottom of the fan cover 400, and the bottom wall of the fan cover 400, the surrounding wall 420 and the bottom of the base housing 100 enclose a first muffling cavity 430. It will be appreciated that the first muffling chamber 430 is located below the fan 210, and mainly functions to deal with noise generated from the fan 210, and the first muffling chamber 430 may have various structures, such as a perforated muffling structure, a reactive muffler, or a filled porous sound absorbing material. Specifically, if the first muffling cavity 430 adopts a perforated muffling structure, different specification parameters need to be set according to the blade frequency generated by the fans 210 with different blade numbers to design the size of the perforated hole, and the muffling principle is that when sound waves are emitted into the perforated plate, air rubs in small holes to generate sound resistance and consume sound energy, so that the purpose of muffling is achieved. Of course, the first muffling cavity 430 may also be muffled by using a reactive muffler, such as a resonant muffler or an expanding muffler, where the reactive muffler is a muffler that generates reflection and interference of sound energy by changing impedance during sound propagation through a sudden change of a pipe section or a bypass resonant cavity, so as to reduce the sound energy radiated from the muffler to achieve the muffling purpose. In addition, the first muffling cavity 430 can also be filled with porous sound-absorbing materials, such as sound-absorbing cotton, foamed silicone adhesive, and the like; or the porous sound absorption material is filled in the sound absorption structure, so that the sound absorption range is expanded. In addition, in order to further reduce the noise of the fan 210, the base housing 100 is provided with a grating structure 121 at the air outlet 120 for slowing down the wind speed of the air outlet 120 and reducing the vortex distribution, thereby further reducing the wind noise.

Referring to fig. 6, the lower housing 360 includes an upper edge portion 331, a lower edge portion 332, an outer peripheral portion 333, an inner peripheral portion 334, at least a portion of the upper edge portion 331 and at least a portion of the lower edge portion 332, and the outer peripheral portion 333 and the inner peripheral portion 334 enclosing to form the second muffling chamber 330. It will be appreciated that the second muffling chamber 330 is primarily directed to the noise generated by the process motor 200, and that the second muffling chamber 330 can be a perforated muffling structure, a reactive muffler, or a filled porous sound absorbing material. It should be noted that, if the second muffling chamber 330 adopts a perforated muffling structure, the perforated muffling structure with different specification parameters can be set according to the noise frequency generated by the motor 200 with different parameters.

Referring to fig. 4, 5 and 6, specifically, the upper cover 350, the lower cover 360 and the fan cover 400 are sequentially and hermetically connected in the vertical direction, a first gasket 361 is disposed at the joint of the upper cover 350 and the lower cover 360, and a second gasket 410 is disposed at the joint of the lower cover 360 and the fan cover 400. It can be understood that the arrangement of the first sealing gasket 361 and the second sealing gasket 410 can ensure that the motor 200 is wrapped and isolated, reduce the vibration noise radiation of the motor 200, isolate the vibration transmission between the motor cover 300 and the base housing 100, and form a better sealing air channel, thereby preventing the air leakage phenomenon, and avoiding the air leakage of the air inlet channel 130 and the air outlet channel 310, which affects the heat dissipation efficiency; moreover, the first seal 361 and the second seal 410 have certain elasticity, and can play a certain role in vibration reduction. Further, the top of the upper cover body 350 and the output shaft of the motor 200 are connected to form a third sealing gasket 351, so that the inner wall of the motor cover 300 forms a relatively sealed air outlet duct 310, cold air in the air inlet duct 130 is prevented from entering from gaps formed by connecting the components, the air speed at the vent 320 is increased, and the heat dissipation effect is improved. In this embodiment, the top of the upper housing 350 is provided with the tapered bosses 352, the plurality of groups of the ventilation openings 320 can be circumferentially arranged along the tapered bosses 352 at intervals, the air inlet area of the ventilation openings 320 is increased, the ventilation openings 320 are opposite to the upper ends of the coil parts of the motor 200, the wind speed of the coil parts of the motor 200 flowing through is increased, and the heat dissipation efficiency of the air outlet duct 310 is improved.

In some embodiments of the present invention, referring to fig. 5 and 6, the first muffling chamber 430 is disposed under the fan 210, and the portion of the top of the first muffling chamber 430 corresponding to the fan cover 400 is provided with a micro-perforated hole 335, so as to perform muffling treatment on the wind noise generated by the fan 210. The second muffling chamber 330 is formed by at least a portion of the upper edge 331 and a portion of the lower edge 332, and by surrounding the outer peripheral portion 333 and the inner peripheral portion 334, and microperforations 335 are uniformly provided on the inner peripheral portion 334, so that the muffling treatment can be performed on the noise generated by the motor 200. Referring to fig. 10, the fan cover 400 of the present embodiment is a volute structure, and specifically adopts an archimedes spiral line structure, so that a centrifugal air duct (not shown) is formed in an inner cavity of the fan cover 400, and the first muffling cavity 430 is convenient for processing noise of the centrifugal air duct while improving the efficiency of the fan 210.

Referring to fig. 7 and 8, the top of the housing 100 is provided with the mounting support 140, the motor 200 has a connecting portion 220 matching with the mounting support 140, the connecting portion 220 is located in the upper cover 350, the connecting portion 220 has a first mounting hole 221, the upper cover 350 has a second mounting hole 354, the mounting support 140 sequentially penetrates through the second mounting hole 354 and the first mounting hole 221 from top to bottom and is fixedly connected to the lower cover 360, the connection structure of the motor 200 and the motor cover 300 with the housing 100 is reasonable in layout, the motor 200 can be completely wrapped in the motor cover 300, and the outward radiation of the noise of the motor 200 is reduced. The bottom of the mounting support 140 is provided with a third mounting hole 141, the upper edge 331 is provided with a fourth mounting hole 3311 correspondingly matched with the third mounting hole 141, and the lower cover 360 and the mounting support 140 are fixed by penetrating the locking member 150 into the fourth mounting hole 3311 and the third mounting hole 141. The locking piece 150 in this embodiment is a bolt and is fixedly connected through the internal thread of the third mounting hole 141, so that the precision requirement of the mounting position of the motor 200 is met, and the problem of radial swing of the motor 200 is solved. Further, the upper cover 350 and the lower cover 360 are fixed to the mounting support 140 at the top of the base housing 100 by bolts, and the fan cover 400 is fixed to the bottom of the base housing 100 by the surrounding wall 420, so that the structure is stable, the mounting strength of the motor cover 300, the fan cover 400 and the base housing 100 is improved, the strength of the whole machine is improved, and the reliability of the product is improved.

Referring to fig. 7, 8 and 9, the mounting support 140 is fitted with a first washer 500, the first washer 500 has a center hole 510 axially formed therein to be fitted to the mounting support 140, the first washer 500 is inserted into the first mounting hole 221, one end of the first washer 500 abuts against the upper cover 350, and the other end of the first washer 500 abuts against the upper edge 331, thereby isolating the motor 200. Specifically, the upper end of the first gasket 500 is provided with a first boss 520, the lower end of the first gasket 500 is provided with a second boss 530, the first boss 520 is clamped between the upper cover 350 and the connecting portion 220, and the second boss 530 is clamped between the upper edge portion 331 and the connecting portion 220, so that the vibration transmission between the motor 200 and other components can be effectively blocked, the vibration transmission between the components can be reduced, and the vibration noise of the engine base housing 100 can be reduced. Further, the mounting strut 140 includes a first column 142 connected to the base housing 100 and a second column 143 connected to the first column 142, the second column 143 is sleeved with a second gasket 550, the second gasket 550 is inserted into the second mounting hole 354, and an upper end of the second gasket 550 is clamped between the upper cover 350 and the first column 142, so that a multi-layer vibration isolation structure is disposed between the mounting structures of the motor 200 and the motor cover 300, and the influence of the vibration of the motor 200 on the motor cover 300 is reduced to the maximum extent; meanwhile, the contact between the motor cover 300 and the engine base shell 100 is avoided, vibration transmission is reduced, and product experience of users is improved. In addition, the multistage vibration isolation structure formed by the first gasket 500 and the second gasket 550 can also improve the sealing performance of the motor cover 300, so that the air outlet duct 310 with better sealing performance is formed, and the heat dissipation efficiency is improved.

Referring to fig. 8 and 9, an elastic chamber 540 is provided in the first boss 520 or the second boss 530. It can be understood that the elastic cavity 540 is a structure with a variable volume, and the elastic cavity 540 may be disposed on the first boss 520 or the second boss 530, or disposed on both the first boss 520 and the second boss 530, which is beneficial to further improving the deformation performance of the first gasket 500, reducing the system stiffness along the axial direction of the motor 200, and also effectively reducing the circumferential vibration caused by the rotation of the motor 200; but also is beneficial to reducing the axial vibration problem caused by the vertical movement of food in the process of beating the food processor in the axial direction. In this embodiment, the first gasket 500 and the second gasket 550 are made of a vibration isolation and damping material, which may be rubber, plastic, or a polymer composite material. Further, go up along portion 331 and the cooperation of second boss 530 butt, go up along portion 331 and upwards the protrusion be equipped with protruding 3312, fourth mounting hole 3311 link up and sets up in the axle center position of protruding 3312, second boss 530 is inwards sunken to be equipped with protruding 3312 matched with recess 531, has improved the installation stability of first packing ring 500, has also promoted the ability that first packing ring 500 resisted circumferential vibration, has prolonged the life of first packing ring 500.

In some embodiments of the present invention, referring to fig. 7 and 8, the connecting portion 220 is disposed around the periphery of the motor 200, the number of the first mounting holes 221 is four, the four first mounting holes 221 are uniformly distributed along the circumference of the connecting portion 220, and the mounting pillars 140 are correspondingly disposed along the four first mounting holes 221. In another embodiment of the present invention, at least four connecting portions 220 are disposed at intervals around the periphery of the motor 200, the at least four connecting portions 220 are uniformly distributed along the circumference of the motor 200, and each connecting portion 220 has a corresponding first mounting hole 221. The connecting structure of the connecting portion 220 and the mounting support 140 makes the stress of the motor 200 more uniform and the mounting more stable, and the multi-stage vibration isolation structure formed by the first gasket 500 and the second gasket 550 is matched, so that the axial rigidity is reduced, the vibration isolation effect is improved, and the transmission of vibration noise is reduced.

Referring to fig. 1, in the food processor provided in this embodiment, the housing assembly 10 is adopted in the food processor, and noise reduction means such as noise elimination, sound insulation, vibration isolation and the like are performed on the housing assembly 10, so that the vibration noise of the housing assembly 10 can be reduced to about 73dBA from the original sound power of 80dBA, the amplitude reduction is 7dBA, the vibration noise is obviously improved, and the user experience is greatly improved.

Other components and configurations of the food processor of the present application are understood and readily available to those of ordinary skill in the art and are not described in detail by the applicant.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (12)

1. Frame subassembly, its characterized in that includes:

the engine base shell is provided with an air inlet and an air outlet;

the motor cover is arranged in the base shell, and an air inlet duct communicated with the air inlet is defined between the motor cover and the base shell;

the fan cover is arranged below the motor cover, and the fan cover and the motor cover are connected and jointly define an air outlet duct communicated with the air outlet;

the motor is accommodated in the motor cover, and a fan accommodated in the fan cover is connected below the motor;

the motor cover comprises an upper cover body and a lower cover body, a ventilation opening communicated with the air inlet duct and the air outlet duct is formed in the upper cover body, and the lower cover body is respectively connected with the upper cover body and the fan cover in a sealing mode.

2. The stand assembly of claim 1, wherein: the bottom of the fan cover extends downwards to form a surrounding wall, and the bottom wall of the fan cover, the surrounding wall and the bottom of the base shell are enclosed to form a first silencing cavity.

3. The stand assembly of claim 2, wherein: the lower cover body comprises an upper edge part, a lower edge part, an outer peripheral part and an inner peripheral part; at least part of the upper edge part and at least part of the lower edge part, and the outer peripheral part and the inner peripheral part are encircled to form a second silencing cavity.

4. The stand assembly of claim 1, wherein: the motor is characterized in that an installation pillar is arranged at the top of the engine base shell, the motor is provided with a connecting part matched with the installation pillar, the connecting part is located in the upper cover body and provided with a first installation hole, the upper cover body is provided with a second installation hole, and the installation pillar sequentially penetrates through the second installation hole and the first installation hole from top to bottom and is fixedly connected with the lower cover body.

5. The stand assembly of claim 4, wherein: the mounting support is sleeved with a first gasket, a center hole matched with the mounting support is axially formed in the first gasket, the first gasket penetrates through the first mounting hole, one end of the first gasket is abutted to the upper cover body, and the other end of the first gasket is abutted to the lower cover body.

6. The stand assembly of claim 5, wherein: the upper end of the first gasket is provided with a first boss, the lower end of the first gasket is provided with a second boss, the first boss is clamped between the upper cover body and the connecting portion, and the second boss is clamped between the lower cover body and the connecting portion.

7. The stand assembly of claim 6, wherein: an elastic cavity is arranged in the first boss or the second boss.

8. The stand assembly of claim 6, wherein: the lower cover body comprises an upper edge part which is matched with the second boss in an abutting mode, the upper edge part is provided with a protrusion in an upward protruding mode, and the second boss is provided with a groove matched with the protrusion in an inward recessed mode.

9. The stand assembly of claim 4, wherein: the installation pillar include with the first cylinder that the frame shell links to each other and with the second cylinder that first cylinder links to each other, the cover is equipped with the second packing ring on the second cylinder, the second packing ring is worn to locate the second mounting hole, the upper end clamp of second packing ring is located go up the cover body with between the first cylinder.

10. A housing assembly according to any one of claims 4 to 9, wherein: the connecting part is arranged around the periphery of the motor, the number of the first mounting holes is at least four, and the at least four first mounting holes are uniformly distributed along the circumferential direction of the connecting part;

or the periphery interval of motor is equipped with four at least connecting portion, four at least connecting portion are followed the circumference equipartition of motor, each connecting portion correspond and seted up one first mounting hole.

11. The stand assembly of claim 1, wherein: the air inlet and the air outlet are respectively arranged on the bottom wall of the engine base shell.

12. Food processor, its characterized in that: comprising a foundation assembly as claimed in any one of claims 1 to 11.

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