Food processor capable of working stably

Abstract

The invention discloses a food processing machine capable of working stably, and relates to the field of life electric appliances, the food processing machine comprises a machine body, a cup body, a crushing device arranged in a crushing cavity, and a brushless motor arranged below the cup body and in transmission connection with the crushing device; the brushless motor comprises a shell with a mounting cavity and a motor body mounted in the mounting cavity, the motor body comprises a rotor and a motor shaft arranged on the rotor, the motor shaft located on the upper side and the lower side of the rotor axially abuts against an upper bearing and a lower bearing respectively, and an upper damping support is arranged between the upper bearing and the top wall of the mounting cavity. A lower damping bracket is arranged between the lower bearing and the bottom wall of the mounting cavity, so that the rotor is flexibly clamped in the mounting cavity, vibration generated during high-speed rotation of the rotor can be reduced to be transmitted to the mounting cavity under the buffering and damping effects of the upper damping bracket and the lower damping bracket, and then vibration transmitted to the whole machine by the brushless motor is reduced; and large vibration noise generated by the machine due to resonance of the whole machine is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of household electrical appliances, and in particular to a food processor with stable operation. Background Art

[0002] With the development of society and the improvement of living standards, people's pursuit of dietary diversity and healthy diet is constantly increasing. Therefore, various industrial food processing machines are gradually miniaturized and enter thousands of households. For example, soybean milk machines not only meet people's needs for healthy diet and nutrition, but also greatly improve people's quality of life, and are therefore loved by people.

[0003] Existing food processors usually include a machine body, a cup body with a grinding chamber, a grinding device arranged in the grinding chamber, and a motor arranged under the cup body and connected to the grinding device. When using the food processor, the user puts the food into the cup body, and the motor rotates at high speed and drives the grinding device to rotate to realize the processing of the food. Most of the motors used in existing food processors are series-excited motors, but this type of motor is heavy, consumes high power, has a high operating temperature, and has a short service life. In addition, carbon powder is generated during use. In order to solve this problem, for example, Chinese utility model patent CN 201805338 U discloses an inner rotor brushless motor of a soybean milk machine. By using a brushless motor in a soybean milk machine, the structure of the whole machine is simple, light, and dust-free, and it can prevent pollution from the external environment and prevent the occurrence of motor short circuit. At the same time, shock-absorbing silicone is provided between the mounting plate of the machine head and the front end cover of the motor to reduce the vibration and noise of the soymilk maker. However, in the actual use of this type of machine, it is found that the main source of vibration is the vibration generated when the motor shaft rotates, which drives the bearing vibration and collides with the end cover, thereby generating vibration noise. The above scheme can only reduce the shock and noise between the end cover and the mounting plate, and cannot solve the vibration noise of the motor when it is working from the root.

[0004] In order to reduce the vibration intensity of the motor during operation and reduce the working noise of the crushing knife, for example, Chinese utility model patent CN 216628289 U discloses a food processing machine with low vibration, in which a bracket is arranged on the top of the motor, and the bracket is provided with a mounting cavity for installing a bearing, and the bearing is arranged in the mounting cavity. Since the bearing is arranged in the mounting cavity on the bracket, the spring used in the existing food processing machine structure to axially position the bearing can be eliminated, which effectively reduces the installation height of the bearing relative to the motor, and can reasonably reduce the length of the upper part of the rotating shaft, which helps to reduce the radial runout of the upper part of the rotating shaft when the motor is working. Although the above technology can be used to radially vibrate the rotating shaft when it rotates, in actual use, the vibration generated when the rotating shaft rotates and drives the vibration of the bearing will still collide with the bracket, and then directly collide with the bottom wall of the cup body, the vibration noise is still very large, and the bearing at the bottom of the rotating shaft will also vibrate with the rotating shaft and collide with the motor shell below, thereby causing the vibration to be transmitted to the whole machine, thereby causing the whole machine to resonate and cause the machine to generate a large vibration noise, and even parts and components will be scattered during the vibration process, which seriously affects the consumer experience. Summary of the invention

[0005] The purpose of the present invention is to provide a food processing machine with stable operation, so as to solve the problem that in the existing food processing machine, after the rotating shaft of the motor vibrates during operation and drives the bearing to vibrate, collision noise is generated between the bearing and the fixed bearing structure, which is then transmitted to the whole machine to cause machine resonance and generate relatively large noise.

[0006] To achieve the above-mentioned purpose, the present invention provides a food processing machine with stable operation, comprising a machine body, a cup body with a grinding chamber, a grinding device arranged in the grinding chamber, and a brushless motor arranged below the cup body and transmission-connected to the grinding device, the brushless motor comprising a shell with an installation chamber and a motor body installed in the installation chamber, the motor body comprising a rotor and a motor shaft arranged on the rotor, the motor shafts located on the upper and lower sides of the rotor are axially abutted with an upper bearing and a lower bearing respectively, and an upper shock-absorbing bracket is provided between the upper bearing and the top wall of the installation chamber, and a lower shock-absorbing bracket is provided between the lower bearing and the bottom wall of the installation chamber, so as to flexibly clamp the rotor in the installation chamber.

[0007] This application sets a brushless motor, and with the help of the characteristics of the brushless motor, when the user uses the food processor to process food, the noise of the motor rotation is lower, achieving the effect of noise reduction. At the same time, the brushless motor can realize variable frequency control, so that the food processor can control the brushless motor to output different speeds according to different food materials and processing processes, which can make the processing effect of food materials better and more complete, improve the taste of food products, and the brushless motor occupies less space, which helps to improve the compactness of the internal structure of the whole machine, and greatly reduces the axial size of the brushless motor and the cup body. At the same time, the brushless motor works more stably and has less vibration, which can effectively reduce the vibration noise generated during the food processing process.

[0008] At the same time, the motor shafts located on the upper and lower sides of the rotor are axially abutted with upper bearings and lower bearings respectively, and an upper shock-absorbing bracket is provided between the upper bearing and the top wall of the installation cavity, and a lower shock-absorbing bracket is provided between the lower bearing and the bottom wall of the installation cavity, so that the upper bearing and the lower bearing are isolated from the cavity wall of the installation cavity, thereby realizing flexible contact between the motor shaft and the cavity wall of the installation cavity, that is, realizing flexible clamping installation of the rotor in the installation cavity, so that when the user uses the food processor, the vibration generated when the rotor rotates at high speed can be reduced to the installation cavity under the buffering and shock-absorbing effect of the upper shock-absorbing bracket and the lower shock-absorbing bracket, thereby reducing the vibration transmitted to the whole machine by the brushless motor, effectively avoiding the resonance of the whole machine causing the machine to generate large vibration noise, and even the scattering of parts during the vibration process. At the same time, it can effectively avoid the situation where the rotor vibrates and drives the bearing to vibrate and collides with the cavity wall of the installation cavity to generate noise, and can reduce the large wear of the bearing caused by the collision, thereby realizing the protection of the upper and lower bearings, which helps to extend their service life.

[0009] In addition, since the overall size of the brushless motor is small and the center of gravity is upward, the center of gravity of the whole machine also moves upward. The flexible clamping of the rotor by the upper and lower shock-absorbing brackets reduces the transmission of vibration to the whole machine, effectively avoiding the situation where the whole machine may swing violently or even tip over due to the upward shift of the center of gravity of the whole machine, which helps to improve the working stability of the whole machine.

[0010] In a preferred implementation of a food processor with stable operation, the shell includes a lower end cover arranged below the motor body, the bottom wall of the cup body is formed with an upper end cover that cooperates with the lower end cover, the motor body is fixed between the upper end cover and the lower end cover, and the end of the motor shaft extends into the crushing chamber to be connected to the crushing device.

[0011] By forming an upper end cover on the bottom wall of the cup body to cooperate with the lower end cover, the motor body is fixed between the upper end cover and the lower end cover to achieve the fixation of the motor body. On the one hand, the structural components of arranging a bracket outside the motor body and then fixing the entire motor in the body through the motor bracket are eliminated, which greatly simplifies the number of parts of the entire brushless motor and the entire machine, thereby reducing the noise generated by each component during vibration, and at the same time helps to further improve the compactness of the internal structure of the whole machine; on the other hand, the fixation of the entire motor body and the cup body can be achieved by only one lower end cover, compressing the axial height of the integrated assembly of the brushless motor and the cup body, so that the axial height of the whole machine is lower and thinner, shortening the assembly dimension chain length of the brushless motor and the cup body and other components, thereby reducing the deflection amplitude of the whole machine when radial vibration occurs, and further reducing the generation of vibration noise. The end of the motor shaft extends into the crushing chamber to be connected to the crushing device, so that the motor shaft is directly connected to the crushing device, eliminating the need for a separate cutter shaft component, and can avoid the situation where the motor shaft is connected to the cutter shaft to transmit the cutter shaft. When the motor shaft vibrates, the motor shaft collides with the cutter shaft to generate noise, further reducing the generation of noise, and can eliminate the bearing used for the cutter shaft. The radial fixation of the motor shaft can be achieved by only one upper bearing, reducing the noise generated by the working bearing of the cutter shaft, further reducing the generation of noise, and at the same time further reducing the number of components, making the structure of the whole machine more compact.

[0012] In a preferred implementation of a food processor with stable operation, the bottom wall of the cup body is provided with an upwardly concave upper mounting groove, the upper bearing is arranged in the upper mounting groove, and the upper shock-absorbing bracket is arranged between the groove wall of the upper mounting groove and the upper bearing.

[0013] An upper concave mounting groove is provided on the bottom wall of the cup body, and the upper bearing is arranged in the upper mounting groove to fix the upper bearing, eliminating the need for a separate fixing component to fix the structure of the upper bearing, thereby further reducing the noise generated by the vibration of each component. At the same time, an upper shock-absorbing bracket is provided between the groove wall of the upper mounting groove and the upper bearing to isolate the upper bearing from the upper mounting groove, effectively reducing the vibration transmitted from the upper bearing to the mounting groove, and further improving the shock-absorbing and noise-reducing effect.

[0014] In a preferred implementation of a food processing machine with stable operation, a shaft seal cooperating with the motor shaft seal is provided above the upper bearing, and the shaft seal is integrally formed with the upper shock-absorbing bracket.

[0015] By providing a shaft seal above the upper bearing and cooperating with the motor shaft seal, on the one hand, the motor shaft is sealed to prevent the food in the grinding chamber from moving downward through the gap between the shaft hole and the motor shaft and entering the upper bearing during food processing, causing friction between the upper bearing and the food, resulting in large friction noise and severe wear of the upper bearing, thereby protecting the upper bearing; on the other hand, the cup body and the brushless motor are isolated, thereby preventing the noise generated by the brushless motor and other components during food processing from propagating upward into the grinding chamber and to the outside world, thereby further reducing the transmission of noise.

[0016] At the same time, the shaft seal and the upper shock absorber bracket are integrally formed, so that the two components are combined into one component, simplifying the parts of the whole machine, and can be assembled synchronously during installation, which helps to improve assembly efficiency, and at the same time can improve the coaxiality of the two, and reduce the serious wear caused by low coaxiality. Moreover, the shaft seal and the upper shock absorber bracket can be linked as a whole. When the motor shaft moves axially, the motor shaft drives the upper bearing to move axially, and the upper bearing drives the upper shock absorber bracket to move and then drives the shaft seal to move, that is: when the motor shaft moves axially, the shaft seal also moves axially synchronously with the motor shaft, achieving relative stillness of the two in the axial direction, thereby effectively avoiding the situation where the shaft seal is seriously worn and leaks due to long-term axial movement of the motor shaft and relative friction with the shaft seal, which helps to extend the service life of the shaft seal. In addition, when the motor shaft swings, the swinging force will be directly transmitted to the shaft seal, and the outer ring of the shaft seal and the cup body are static seals. The sealing conditions of the static seal are simple, and the swing of the motor shaft has little effect on it.

[0017] In a preferred implementation of a food processor with stable operation, the cup body is detachably connected to the upper part of the machine body, the machine body includes a shell, the brushless motor is arranged in the shell, the shell includes an upper end cover fixed below the top wall of the shell and a lower end cover located below the motor body, and the motor body is fixed between the upper end cover and the lower end cover; or,

[0018] The shell comprises a lower end cover arranged below the motor body, an upper end cover matched with the lower end cover is formed on the bottom wall of the shell, and the motor body is fixed between the upper end cover and the lower end cover.

[0019] By setting the cup body to be detachably connected to the top of the machine body, the user can detach the cup body from the machine body and pour the slurry out when using the food processor, and can clean the cup body separately to achieve deep cleaning of the cup body and improve the neatness of the cup body. In addition, the shell realizes the overall accommodation of the brushless motor, which can effectively reduce the outward propagation of the vibration noise generated when the brushless motor is working, and further improve the noise reduction effect. At the same time, the setting of the upper shock-absorbing bracket and the lower shock-absorbing bracket reduces the transmission of the vibration of the brushless motor to the shell, and can effectively reduce the vibration of the brushless motor to the shell, and the shell and the cup body vibrate and collide to generate a large noise, and can avoid the situation that the shell and the cup body collide to cause the cup body to vibrate with a large amplitude or even dump, which helps to improve the stability of the whole machine. In addition, the shell includes an upper end cover fixed below the top wall of the shell and a lower end cover located below the motor body. The motor body is fixed between the upper end cover and the lower end cover to achieve the fixation of the motor body. At the same time, the upper end cover and the lower end cover can rebound the noise generated when the motor body rotates, and further improve the noise reduction effect.

[0020] By configuring the housing to include a lower end cover disposed below the motor body, and forming an upper end cover that matches the lower end cover on the bottom wall of the housing, and the motor body being fixed between the upper end cover and the lower end cover, the number of components of the whole machine is simplified, thereby reducing the situation in which the relative vibration noise between the components caused by the large number of components when the brushless motor is working, and further reducing the generation of noise. At the same time, the length of the assembly dimension chain between the brushless motor and the housing is shortened, thereby reducing the deflection amplitude of the body when radial vibration occurs, and further reducing the generation of vibration noise.

[0021] In a preferred implementation of a food processing machine with stable operation, the upper shock-absorbing bracket and the lower shock-absorbing bracket include flexible silicone and a supporting frame arranged in the flexible silicone.

[0022] By configuring the upper shock-absorbing bracket and the lower shock-absorbing bracket to include flexible silicone and a supporting frame arranged in the flexible silicone, the vibration of the upper bearing and the lower bearing can be transmitted to the upper shock-absorbing bracket and the lower shock-absorbing bracket to achieve effective shock absorption and noise reduction through the flexible silicone. At the same time, the supporting frame in the flexible silicone achieves rigid support for the flexible silicone, solidifies the deformation direction of the flexible silicone, and avoids irregular deformation of the upper shock-absorbing bracket or the lower shock-absorbing bracket, resulting in poor shock absorption effect or even shock absorption failure.

[0023] In a preferred implementation of a food processor with stable operation, the support frame is integrally formed in the flexible silicone; or,

[0024] The support frame and the flexible silica gel are formed separately, and the support frame is arranged between the flexible silica gel and the upper bearing or the lower bearing.

[0025] By setting the support frame to be integrally formed in the flexible silicone, the production steps of the two are simplified, and the production process of fixing the two together is eliminated, which helps to improve production efficiency. At the same time, the support frame is located in the flexible silicone, so that the flexible silicone can wrap the support frame in all directions, so that the upper bearing and the lower bearing can achieve flexible contact with the inner ring of the shock-absorbing bracket, and the outer ring of the shock-absorbing bracket can achieve flexible contact with the wall of the installation cavity, further enhancing the flexible isolation effect, and further enhancing the shock-absorbing effect.

[0026] Since the support skeleton structure is relatively rigid and the production precision is relatively high, the support skeleton and the flexible silicone are formed separately, and the support skeleton is arranged between the flexible silicone and the upper bearing or the lower bearing, so that the support skeleton is in direct contact and cooperation with the upper bearing or the lower bearing, thereby ensuring that the dimensional tolerance of the bearing mounting surface is the same as the original installation dimension after the upper bearing and the lower bearing are installed in place, thereby ensuring the coaxiality of the bearing after installation, improving the positioning effect of the bearing on the motor shaft, and avoiding the situation where the motor shaft has a large deflection amplitude and causes large vibration noise due to low coaxiality after the bearing is installed.

[0027] In a preferred implementation of a food processing machine with stable operation, an upper mounting groove is provided on the top wall of the mounting cavity, an upper bearing is arranged in the upper mounting groove, and an upper shock-absorbing bracket includes a first annular rib provided between a side wall of the upper bearing and a side wall of the upper mounting groove and a second annular rib provided between a top wall of the upper bearing and a top wall of the upper mounting groove; or,

[0028] The bottom wall of the mounting cavity is provided with a lower mounting groove, the lower bearing is arranged in the lower mounting groove, and the lower shock-absorbing bracket includes a first annular rib arranged between the side wall of the lower bearing and the side wall of the lower mounting groove and a second annular rib arranged between the top wall of the lower bearing and the bottom wall of the lower mounting groove.

[0029] By configuring the upper shock-absorbing bracket or the lower shock-absorbing bracket to include a first annular rib and a second annular rib connected to the first annular rib, the bearing can be flexibly isolated from the mounting groove in the axial direction through the first annular rib, and at the same time, the bearing can be flexibly isolated from the mounting groove in the radial direction through the second annular rib. This allows the motor shaft to reduce axial movement or radial swing through the buffering and shock absorption of the shock-absorbing bracket, thereby reducing the vibration transmitted to the entire machine by the brushless motor, and effectively preventing the entire machine from generating large vibration noise due to resonance.

[0030] In a preferred implementation of a food processing machine with stable operation, the first annular rib and / or the second annular rib are further provided with interference ribs extending outward.

[0031] By providing the first annular rib and / or the second annular rib with an outwardly extending interference rib, on the one hand, the interference rib is directly in contact with the groove wall of the mounting groove, so that when the bearing transmits vibration to the shock-absorbing bracket, the interference rib can further provide a larger deformation space, thereby further improving the shock-absorbing effect of the shock-absorbing bracket; on the other hand, the matching surface area between the shock-absorbing bracket and the groove wall of the mounting groove is reduced, thereby reducing the friction between the two, thereby facilitating the installation of the shock-absorbing bracket and helping to improve assembly efficiency.

[0032] In a preferred implementation of a food processing machine with stable operation, a buffer gap is further provided between the upper shock-absorbing bracket and the top wall of the mounting cavity.

[0033] By providing a buffer gap between the upper shock-absorbing bracket and the top wall of the mounting cavity, when the motor shaft undergoes a large axial movement, the upper shock-absorbing bracket can not only partially buffer and reduce the shock of the motor shaft, but also further reduce the transmission of motor shaft vibration to the mounting cavity through the buffer gap, thereby further improving the shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 A cross-sectional view of a food processor in one embodiment of the present invention;

[0036] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0037] Figure 3 A cross-sectional view of an upper shock-absorbing bracket in one embodiment of the present invention;

[0038] Figure 4 A cross-sectional view of a food processor in another embodiment of the present invention;

[0039] Figure 5 for Figure 4 Enlarged view of middle part B;

[0040] Figure 6 A cross-sectional view of an upper shock-absorbing bracket and a shaft seal in another embodiment of the present invention;

[0041] Figure 7 It is a cross-sectional view of a lower shock-absorbing bracket in another embodiment of the present invention.

[0042] List of parts and reference numerals:

[0043] 1-machine body; 2-cup body, 21-crushing chamber, 22-upper mounting groove, 23-upper end cover; 3-crushing device; 4-brushless motor, 41-rotor, 411-motor shaft, 42-mounting chamber; 5-upper bearing; 6-lower bearing; 7-upper shock-absorbing bracket, 71-first annular rib, 72-second annular rib, 721-interference rib, 73-flexible silicone, 74-support frame, 741-sealing end face; 8-lower shock-absorbing bracket; 9-shaft seal; 10-lower end cover, 101-lower mounting groove. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0045] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0046] like Figures 1 to 7 As shown, the present invention provides a food processing machine with stable operation, including a machine body 1, a cup body 2 with a grinding chamber 21, a grinding device 3 arranged in the grinding chamber 21, and a brushless motor 4 arranged below the cup body 2 and transmission-connected to the grinding device 3, the brushless motor 4 including a shell formed with an installation chamber 42 and a motor body installed in the installation chamber 42, the motor body including a rotor 41 and a motor shaft 411 arranged in the rotor 41, the motor shaft 411 located on the upper and lower sides of the rotor 41 are axially abutted with an upper bearing 5 and a lower bearing 6 respectively, and an upper shock-absorbing bracket 7 is provided between the upper bearing 5 and the top wall of the installation chamber 42, and a lower shock-absorbing bracket 8 is provided between the lower bearing 6 and the bottom wall of the installation chamber 42, so as to flexibly clamp the rotor 41 in the installation chamber 42.

[0047] The present application sets a brushless motor 4, and with the help of the characteristics of the brushless motor 4, when the user uses the food processor to process food, the noise of the motor rotation is lower, and the noise reduction effect is achieved. At the same time, the brushless motor 4 can realize frequency conversion control, so that the food processor can control the brushless motor 4 to output different speeds according to different food materials and processing processes, which can make the processing effect of food materials better and more sufficient, improve the taste of food products, and the brushless motor 4 occupies less space, which helps to improve the compactness of the internal structure of the whole machine, and greatly reduces the axial size of the brushless motor 4 and the cup body 2. At the same time, the brushless motor 4 works more stably and has less vibration, which can effectively reduce the vibration noise generated during the food processing process.

[0048] It should be noted that the motor body of the present application also includes a stator. Specifically, the rotor is located outside the stator. Compared with the brushless motor with an inner rotor, it has a higher power density, better heat dissipation, and a simpler structure, which can further improve the compactness of the overall structure and reduce the vibration and noise generated by more components.

[0049] At the same time, the motor shaft 411 located on the upper and lower sides of the rotor 41 are axially abutted against the upper bearing 5 and the lower bearing 6 respectively, and an upper shock-absorbing bracket 7 is provided between the upper bearing 5 and the top wall of the installation cavity 42, and a lower shock-absorbing bracket 8 is provided between the lower bearing 6 and the bottom wall of the installation cavity 42, so that the upper bearing 5 and the lower bearing 6 are isolated from the cavity wall of the installation cavity 42, thereby realizing flexible contact between the motor shaft 411 and the cavity wall of the installation cavity 42, that is: realizing flexible clamping installation of the rotor 41 in the installation cavity 42, so that when the user uses the food processor, the vibration generated when the rotor 41 rotates at high speed can be reduced to the installation cavity 42 under the buffering and shock-absorbing effect of the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8, thereby reducing the vibration transmitted to the installation cavity 42 by the brushless motor 4, and effectively avoiding the resonance of the whole machine causing the machine to generate large vibration noise, and even the scattering of parts during the vibration process. At the same time, it can effectively prevent the rotor 41 from vibrating and causing the bearing to vibrate and collide with the wall of the installation cavity 42 to generate noise, and can reduce the greater wear of the bearing caused by the collision, thereby protecting the upper bearing 5 and the lower bearing 6 and helping to extend their service life.

[0050] In addition, since the overall volume of the brushless motor 4 is small and the center of gravity is upward, the center of gravity of the whole machine also moves upward. The flexible clamping of the rotor 41 by the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8 reduces the transmission of vibration to the whole machine, effectively avoiding the situation where the whole machine may swing greatly or even tip over due to the upward shift of the center of gravity of the whole machine during vibration, which helps to improve the working stability of the whole machine.

[0051] It should be noted that the present application does not specifically limit the relative relationship between the cup body 2 and the body 1, which can be any one of the following embodiments:

[0052] Example 1: Figure 1 , Figure 2 As shown, in this embodiment, the shell includes a lower end cover 10 arranged below the motor body, the bottom wall of the cup body 2 is formed with an upper end cover 23 that cooperates with the lower end cover 10, the motor body is fixed between the upper end cover 23 and the lower end cover 10, and the end of the motor shaft 411 extends into the crushing chamber 21 to be connected to the crushing device 3.

[0053] By forming an upper end cover 23 on the bottom wall of the cup body 2 to cooperate with the lower end cover 10, the motor body is fixed between the upper end cover 23 and the lower end cover 10 to achieve the fixation of the motor body. On the one hand, the structural component of arranging a bracket outside the motor body and then fixing the entire motor in the body 1 through the motor bracket is eliminated, which greatly simplifies the number of parts of the entire brushless motor 4 and the entire machine, thereby reducing the noise generated by each component during vibration, and at the same time helps to further improve the compactness of the internal structure of the whole machine; on the other hand, the entire motor body and the cup body 2 can be fixed by only one lower end cover 10, which compresses the axial height of the integrated assembly of the brushless motor 4 and the cup body 2, thereby making the axial height of the whole machine lower and thinner, shortening the assembly dimension chain length of the brushless motor 4 and the cup body 2 and other components, thereby reducing the deflection amplitude of the whole machine when radial vibration occurs, and further reducing the generation of vibration noise. And the end of the motor shaft 411 extends into the crushing chamber 21 to be connected with the crushing device 3, so that the motor shaft 411 is directly connected with the crushing device 3, eliminating the component of a separate cutter shaft, and can avoid the situation where the motor shaft 411 is connected with the cutter shaft to realize the transmission of the cutter shaft. When the motor shaft 411 vibrates, the collision noise with the cutter shaft is avoided, which further reduces the generation of noise, and can omit the bearing used for the cutter shaft. The radial fixation of the motor shaft 411 can be achieved by only an upper bearing 5, which reduces the noise generated by the bearing of the cutter shaft when it is working, further reduces the generation of noise, and further reduces the number of components, making the structure of the whole machine more compact.

[0054] Of course, in this embodiment, the upper end cover 23 is not only formed on the bottom wall of the cup body 2, but can also be a separately formed structural component and fixed below the bottom wall of the cup body 2, which will not be described in detail here.

[0055] As a preferred embodiment of this embodiment, Figure 2 As shown, the bottom wall of the cup body 2 is provided with an upwardly concave upper mounting groove 22 , the upper bearing 5 is arranged in the upper mounting groove 22 , and the upper shock-absorbing bracket 7 is arranged between the groove wall of the upper mounting groove 22 and the upper bearing 5 .

[0056] An upper concave mounting groove 22 is provided on the bottom wall of the cup body 2, and the upper bearing 5 is arranged in the upper mounting groove 22, so that the upper bearing 5 is fixed, eliminating the need to set up a separate fixing component to fix the structure of the upper bearing 5, thereby further reducing the noise generated by the vibration of each component. At the same time, the upper shock-absorbing bracket 7 is provided between the groove wall of the upper mounting groove 22 and the upper bearing 5, so as to isolate the upper bearing 5 from the upper mounting groove 22, effectively reduce the vibration transmitted from the upper bearing 5 to the mounting groove, and further improve the shock-absorbing and noise reduction effect.

[0057] Furthermore, if Figure 4 , Figure 5 , Figure 6As shown, a shaft seal 9 is also provided above the upper bearing 5 and is sealed with the motor shaft 411. It should be noted that the present application does not specify the relative relationship between the shaft seal 9 and the upper shock-absorbing bracket 7. As a preferred embodiment of this embodiment, the shaft seal 9 and the upper shock-absorbing bracket 7 are integrally formed. Specifically, the shaft seal 9 and the upper shock-absorbing bracket 7 are integrally formed silicone parts, and a support frame 74 is provided in the silicone part. The silicone of the shaft seal 9 and the upper shock-absorbing bracket 7 are both encapsulated with the support frame 74 to further achieve linkage.

[0058] By providing a shaft seal 9 above the upper bearing 5 and sealingly cooperating with the motor shaft 411, on the one hand, the motor shaft 411 is sealed to prevent the food in the grinding chamber 21 from moving downward through the gap between the shaft hole and the motor shaft 411 and entering the upper bearing 5 during food processing, causing friction between the upper bearing 5 and the food, resulting in the upper bearing 5 generating a large friction noise and severe wear, thereby protecting the upper bearing 5; on the other hand, the cup body 2 and the brushless motor 4 are isolated, thereby preventing the noise generated by the brushless motor 4 and other components during food processing from propagating upward into the grinding chamber 21 and to the outside world, thereby further reducing the transmission of noise.

[0059] At the same time, the shaft seal 9 and the upper shock-absorbing bracket 7 are integrally formed, so that the two components are combined into one component, simplifying the components of the whole machine, and can be assembled synchronously during installation, which helps to improve the assembly efficiency, and at the same time can improve the coaxiality of the two, and reduce the serious wear caused by low coaxiality. Moreover, the shaft seal 9 and the upper shock-absorbing bracket 7 can be linked as a whole. When the motor shaft 411 moves axially, the motor shaft 411 drives the upper bearing 5 to move axially, and the upper bearing 5 drives the upper shock-absorbing bracket 7 to move and then drives the shaft seal 9 to move, that is: when the motor shaft 411 moves axially, the shaft seal 9 also moves axially synchronously with the motor shaft 411, achieving relative stillness of the two in the axial direction, thereby effectively avoiding the situation that the shaft seal 9 is seriously worn and leaks due to the long-term axial movement of the motor shaft 411 and the relative friction with the shaft seal 9, which helps to extend the service life of the shaft seal 9. In addition, when the motor shaft 411 swings, the swinging force will be directly transmitted to the shaft seal 9, and there is a static seal between the outer ring of the shaft seal 9 and the cup body 2. The sealing condition of the static seal is simple and the swing of the motor shaft 411 has little effect on it.

[0060] Embodiment 2: In this embodiment, the cup body 2 is detachably connected to the top of the machine body 1, the machine body 1 includes a shell, and the brushless motor 4 is arranged in the shell.

[0061] By setting the cup body 2 to be detachably connected to the top of the machine body 1, the user can detach the cup body 2 from the machine body 1 and pour out the slurry when using the food processor. At the same time, the cup body 2 can be cleaned separately to achieve deep cleaning of the cup body 2 and improve the cleanliness of the cup body 2. In addition, the shell realizes the overall accommodation of the brushless motor 4, which can effectively reduce the outward propagation of the vibration noise generated by the brushless motor 4 when it is working, and further improve the noise reduction effect. At the same time, the setting of the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8 reduces the transmission of the vibration of the brushless motor 4 to the shell, and can effectively reduce the transmission of the vibration of the brushless motor 4 to the shell, and the shell and the cup body 2 vibrate and collide to generate a large noise. At the same time, it can avoid the situation where the cup body 2 vibrates with a large amplitude or even dumps after the collision between the shell and the cup body 2, which helps to improve the stability of the whole machine.

[0062] It should be further explained that the structure of the lower shell of this embodiment is not specifically limited, and it can be any one of the following embodiments:

[0063] Embodiment 1: In this embodiment, the housing includes an upper end cover 23 fixed below the top wall of the housing and a lower end cover 10 located below the motor body, and the motor body is fixed between the upper end cover 23 and the lower end cover 10 .

[0064] By configuring the shell to include an upper end cover 23 fixed below the top wall of the shell and a lower end cover 10 located below the motor body, the motor body is fixed between the upper end cover 23 and the lower end cover 10 to achieve fixation of the motor body. At the same time, the upper end cover 23 and the lower end cover 10 can rebound the noise generated when the motor body rotates, thereby further improving the noise reduction effect.

[0065] Embodiment 2: In this embodiment, the shell includes a lower end cover 10 arranged below the motor body, the bottom wall of the shell is formed with an upper end cover 23 that cooperates with the lower end cover 10, and the motor body is fixed between the upper end cover 23 and the lower end cover 10.

[0066] By configuring the housing to include a lower end cover 10 disposed below the motor body, and forming an upper end cover 23 that cooperates with the lower end cover 10 on the bottom wall of the housing, and the motor body being fixed between the upper end cover 23 and the lower end cover 10, the number of components of the whole machine is simplified, thereby reducing the situation where the brushless motor 4 is working and causing the relative vibration noise between the components due to the large number of components, and further reducing the generation of noise. At the same time, the length of the assembly dimension chain between the brushless motor 4 and the housing is shortened, thereby reducing the deflection amplitude of the body 1 when radial vibration occurs, and further reducing the generation of vibration noise.

[0067] As a preferred embodiment of the present application, Figure 3 , Figure 6 , Figure 7As shown, the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8 include a flexible silicone rubber 73 and a supporting frame 74 disposed in the flexible silicone rubber 73 .

[0068] By configuring the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8 to include a flexible silicone rubber 73 and a support frame 74 disposed in the flexible silicone rubber 73, the vibration of the upper bearing 5 and the lower bearing 6 can be transmitted to the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8 to achieve effective shock absorption and noise reduction through the flexible silicone rubber 73. At the same time, the support frame 74 in the flexible silicone rubber 73 provides rigid support for the flexible silicone rubber 73, solidifies the deformation direction of the flexible silicone rubber 73, and avoids irregular deformation of the upper shock-absorbing bracket 7 or the lower shock-absorbing bracket 8, resulting in poor shock absorption effect or even shock absorption failure.

[0069] It should be noted that the present application does not specifically limit the relative relationship between the support frame 74 and the flexible silicone 73, which can be any one of the following embodiments:

[0070] Example 1: Figure 3 As shown, in this embodiment, the support frame 74 is integrally formed in the flexible silicone 73 .

[0071] By setting the support skeleton 74 to be integrally formed in the flexible silicone 73, the production steps of the two are simplified, and the production process of fixing the two together is eliminated, which helps to improve production efficiency. At the same time, the support skeleton 74 is located in the flexible silicone 73, so that the flexible silicone 73 can wrap the support skeleton 74 in all directions, so that the upper bearing 5 and the lower bearing 6 can both achieve flexible contact with the inner ring of the shock-absorbing bracket, and the outer ring of the shock-absorbing bracket can achieve flexible contact with the wall of the installation cavity 42, further enhancing the flexible isolation effect, and further enhancing the shock-absorbing effect.

[0072] Example 2: Figure 5 , Figure 6 As shown, in this embodiment, the support frame 74 and the flexible silicone 73 are formed separately, and the support frame 74 is arranged between the flexible silicone 73 and the upper bearing 5 or the lower bearing 6.

[0073] Since the support skeleton 74 has a relatively rigid structure and high production precision, the support skeleton 74 and the flexible silicone 73 are formed separately, and the support skeleton 74 is arranged between the flexible silicone 73 and the upper bearing 5 or the lower bearing 6, so that the support skeleton 74 is in direct contact and cooperation with the upper bearing 5 or the lower bearing 6, thereby ensuring that the dimensional tolerance of the bearing mounting surface is the same as the original installation dimension after the upper bearing 5 and the lower bearing 6 are installed in place, thereby ensuring the coaxiality of the bearing after installation, improving the positioning effect of the bearing on the motor shaft 411, and avoiding the situation where the motor shaft 411 has a large swing amplitude and causes large vibration noise due to the low coaxiality of the bearing after installation.

[0074] Furthermore, if Figure 7As shown, a sealing end surface 741 is provided between the extended end of the support frame 74 and the flexible silicone 73, which is used to seal the glue when the upper shock-absorbing bracket 7 and the lower shock-absorbing bracket 8 are formed. At the same time, an inclined wire surface is provided at one end of the support frame 74 facing the upper bearing 5 or the lower bearing 6, which is used to guide the installation of the upper bearing 5 or the lower bearing 6 during assembly, thereby helping to improve assembly efficiency.

[0075] As a preferred embodiment of the present application, Figure 2 As shown, the top wall of the mounting cavity 42 is provided with an upper mounting groove 22, the upper bearing 5 is arranged in the upper mounting groove 22, the upper shock-absorbing bracket 7 includes a first annular rib 71 provided between the side wall of the upper bearing 5 and the side wall of the upper mounting groove 22, and a second annular rib 72 provided between the top wall of the upper bearing 5 and the top wall of the upper mounting groove 22, the bottom wall of the mounting cavity 42 is provided with a lower mounting groove 101, the lower bearing 6 is arranged in the lower mounting groove 101, and the lower shock-absorbing bracket 8 includes a first annular rib 71 provided between the side wall of the lower bearing 6 and the side wall of the lower mounting groove 101, and a second annular rib 72 provided between the top wall of the lower bearing 6 and the bottom wall of the lower mounting groove 101.

[0076] By configuring the upper shock-absorbing bracket 7 or the lower shock-absorbing bracket 8 to include a first annular rib 71 and a second annular rib 72 connected to the first annular rib 71, the bearing can be flexibly isolated from the mounting groove in the axial direction through the first annular rib 71, and can be flexibly isolated from the mounting groove in the radial direction through the second annular rib 72. This allows the motor shaft 411 to reduce axial movement or radial swing through the buffering and damping of the shock-absorbing bracket, thereby reducing the vibration transmitted from the brushless motor 4 to the entire machine, and effectively preventing the entire machine from generating large vibration noise due to resonance.

[0077] Furthermore, if Figure 3 As shown, the first annular rib 71 and / or the second annular rib 72 is further provided with an interference rib 721 extending outward.

[0078] By further providing the first annular rib 71 and / or the second annular rib 72 with an outwardly extending interference rib 721, on the one hand, the interference rib 721 directly contacts and abuts against the groove wall of the installation groove, so that when the bearing transmits vibration to the shock-absorbing bracket, the interference rib 721 can further provide a larger deformation space, thereby further improving the shock-absorbing effect of the shock-absorbing bracket; on the other hand, the mating surface area between the shock-absorbing bracket and the groove wall of the installation groove is reduced, thereby reducing the friction between the two, thereby facilitating the installation of the shock-absorbing bracket and helping to improve assembly efficiency. Preferably, a plurality of interference ribs 721 are provided, and are distributed at intervals along the vertical direction of the first annular rib 71 or the horizontal direction of the second annular rib 72.

[0079] As a preferred embodiment of the present application, a buffer gap is further provided between the upper shock-absorbing bracket 7 and the top wall of the mounting cavity 42 .

[0080] By providing a buffer gap between the upper shock-absorbing bracket 7 and the top wall of the mounting cavity 42, when the motor shaft 411 undergoes a large axial movement, the upper shock-absorbing bracket 7 can not only partially buffer and reduce the shock of the motor shaft 411, but also further reduce the transmission of vibration of the motor shaft 411 to the mounting cavity 42 through the buffer gap, thereby further improving the shock-absorbing effect.

[0081] The technical solution protected by the present invention is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any one embodiment with the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A food processing machine with stable operation, comprising a machine body, a cup body with a grinding chamber, a grinding device arranged in the grinding chamber, and a brushless motor arranged under the cup body and drivingly connected to the grinding device, characterized in that: The brushless motor includes a shell forming a mounting cavity and a motor body mounted in the mounting cavity, the motor body includes a rotor and a motor shaft arranged on the rotor, the motor shaft located on the upper and lower sides of the rotor are axially abutted with an upper bearing and a lower bearing respectively, and an upper shock-absorbing bracket is provided between the upper bearing and the top wall of the mounting cavity, and a lower shock-absorbing bracket is provided between the lower bearing and the bottom wall of the mounting cavity, so as to flexibly clamp the rotor in the mounting cavity.

2. A food processing machine with stable operation according to claim 1, characterized in that: The shell includes a lower end cover arranged below the motor body, the bottom wall of the cup body is formed with an upper end cover that cooperates with the lower end cover, the motor body is fixed between the upper end cover and the lower end cover, and the end of the motor shaft extends into the crushing chamber to be connected to the crushing device.

3. A food processing machine with stable operation according to claim 2, characterized in that: The bottom wall of the cup body is provided with an upper concave mounting groove, the upper bearing is arranged in the upper mounting groove, and the upper shock absorbing bracket is arranged between the groove wall of the upper mounting groove and the upper bearing.

4. A food processing machine with stable operation according to claim 3, characterized in that: A shaft seal that cooperates with the motor shaft seal is also provided above the upper bearing, and the shaft seal is integrally formed with the upper shock-absorbing bracket.

5. A food processing machine with stable operation according to claim 1, characterized in that: The cup body is detachably connected to the upper part of the machine body, the machine body includes a shell, the brushless motor is arranged in the shell, the shell includes an upper end cover fixed below the top wall of the shell and a lower end cover located below the motor body, and the motor body is fixed between the upper end cover and the lower end cover; or, The shell includes a lower end cover arranged below the motor body, the bottom wall of the shell is formed with an upper end cover matched with the lower end cover, and the motor body is fixed between the upper end cover and the lower end cover.

6. A food processing machine with stable operation according to claim 1, characterized in that: The upper shock-absorbing bracket and the lower shock-absorbing bracket include flexible silica gel and a supporting frame arranged in the flexible silica gel.

7. A food processing machine with stable operation according to claim 6, characterized in that: The support frame is integrally formed in the flexible silicone; or, The support frame and the flexible silica gel are formed separately, and the support frame is arranged between the flexible silica gel and the upper bearing or the lower bearing.

8. A food processing machine with stable operation according to claim 1, characterized in that: The top wall of the mounting cavity is provided with an upper mounting groove, the upper bearing is arranged in the upper mounting groove, and the upper shock-absorbing bracket includes a first annular rib arranged between the side wall of the upper bearing and the side wall of the upper mounting groove and a second annular rib arranged between the top wall of the upper bearing and the top wall of the upper mounting groove; or, The bottom wall of the mounting cavity is provided with a lower mounting groove, the lower bearing is arranged in the lower mounting groove, and the lower shock-absorbing bracket includes a first annular rib arranged between the side wall of the lower bearing and the side wall of the lower mounting groove and a second annular rib arranged between the top wall of the lower bearing and the bottom wall of the lower mounting groove.

9. A food processing machine with stable operation according to claim 8, characterized in that: The first annular rib and / or the second annular rib are also provided with an interference rib extending outwards.

10. A food processing machine with stable operation according to claim 1, characterized in that: A buffer gap is also provided between the upper shock-absorbing bracket and the top wall of the installation cavity.

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