Juicer

Abstract

A juicer, comprising: a main unit (1); and a juicing assembly (2) mounted in the main unit (1) and comprising a screw (21); and a drive assembly (3) disposed in the main unit (1) and comprising a support (31), wherein the support (31) and an upper first housing (32) enclose a first cavity (34) for accommodating a speed reducer (37), and the support (31) and a lower second housing (33) enclose a second cavity (35) for accommodating an electric motor assembly (36); the drive assembly (3) further comprises a power input shaft (38) and a power output shaft (39); one side of the power input shaft (38) is in transmission connection with the electric motor assembly (36), and the other side of the power input shaft (38) extends into the first cavity (34) through the support (31) and is in transmission connection with the speed reducer (37); the power output shaft (39) is arranged offset relative to the center of the support (31) and is in transmission connection by means of the speed reducer (37); one end of the power output shaft (39) is mounted at the upper end of the support (31), and the other end of the power output shaft (39) is in transmission connection with the screw (21); and the dimensional error value between the outer diameter and the height of the drive assembly (3) does not exceed 20%. With the support (31) as the positioning reference, the space of the drive assembly (3) is compressed, which improves transmission precision, reduces noise, achieves product flattening, and enhances overall structural strength.

Description

A juicer

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 22, 2024, with application number CN202410086623.9 and invention name “A Juicer”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The invention relates to the technical field of food processing machines, in particular to a juicer with low noise and compact structure. Background Art

[0003] Juicers, developed from conventional juicers, primarily convert fruit into juice for enhanced taste and ease of consumption. Compared to a juicer, juicers extract juice through a low-speed screw extrusion process. The lower the speed, the better. This process extracts the juice slowly, like squeezing a towel, without damaging the fruit's cellular structure and preserving its nutrients. Furthermore, this low-speed juice extraction doesn't generate high heat, thus avoiding the problem of heat-induced oxidation. In related technologies, a motor combined with a reduction mechanism outputs slow, high-torque output to meet the high torque requirements of the screw for slow extraction.

[0004] The application number is CN201911084806.2, and the invention name is "Compatible power device for juicer and blender". It discloses a drive unit, a first drive shaft, a second drive shaft, a support unit, a first bearing and a second bearing. The drive unit includes a motor, a clutch bearing and a reduction unit. The motor is used to rotate the first drive shaft at high speed. The clutch bearing is installed on the first drive shaft. The upper end of the first drive shaft is sleeved with the second drive shaft. The second drive shaft is inserted into the bottom of the screw. A reduction unit is provided between the second drive shaft and the clutch bearing. The reduction unit includes a three-stage sun gear, three-stage planetary gears and a ring gear. The first drive shaft is locked in one direction under the action of the clutch bearing. The first drive shaft transmits the driving force to the power transmission unit. The first sun gear is inserted into the hollow above the power transmission unit. The first sun gear rotates together with the power transmission unit on the first drive shaft. The shaft of the third planetary gear can be inserted into the second drive shaft. The second drive shaft undergoes multiple stages of reduction. The third planetary gear drives the second drive shaft to move at a low speed. However, the technical problems existing in this technical solution are: a planetary carrier needs to be set up to achieve deceleration through planetary gears. On the one hand, the design and installation are complicated, which makes the replaceability of the deceleration part poor; on the other hand, the multi-stage planetary gears can only transmit in the longitudinal direction, resulting in a long longitudinal transmission path, making the motor drive component structure not compact, and correspondingly requiring a longer output shaft, resulting in poor output shaft rigidity and greatly reduced overall structural strength; in addition, since multiple planetary gears and multiple sun gears have multiple positioning references and no centering positioning reference, a large positioning error is generated, which greatly reduces the gear meshing accuracy and generates a lot of noise.

[0005] Application number CN201410708258.7, entitled "A Top-Drive Juicer," discloses a main body, a drive unit, and an extraction unit. The drive unit is located on the upper side of the main body, while the extraction unit is located on the lower side. The drive unit includes a reduction gear unit and a motor. The motor transmits power to the reduction gear unit, which includes multiple rotating shafts and reduction gears coupled to each rotating shaft. The housing includes a lower housing and an upper housing. The lower housing has a support plate configured to support the electric driven unit of the motor, while the upper housing covers the reduction gear unit. A technical problem with this solution is that the motor is located to the left of the reduction gear unit, and the reduction gear unit reduces speed in stages from left to right in a horizontal direction. There is an error between the centerlines of the first-stage rotating shaft and the second-stage rotating shaft, and the reduction continues in stages in this manner. Due to the lack of a centering reference, the center error between the first-stage rotating shaft and the last-stage rotating shaft is large, significantly reducing gear meshing accuracy and generating considerable noise. In addition, the reduction gear part reduces speed step by step from left to right in the horizontal direction, resulting in a long horizontal transmission path. The power input shaft and the power output shaft are located at both ends respectively. The motor and the reduction gear part are cantilever structures as a whole. The width of the whole machine is large, the horizontal structure is not compact enough, and the horizontal structural strength is much lower. After deceleration, the power is input to the screw, which makes the screw prone to radial disturbance.

[0006] The above-mentioned disclosed technical solutions all have the following technical problems: the slow and high torque output to the screw through the motor and reducer has a large positioning error between the components due to the long transmission path of the reducer, which greatly reduces the meshing accuracy of the gears and causes a lot of noise; at the same time, the reducer with a long transmission path not only makes the motor drive component structure not compact, but also reduces the structural strength. Summary of the Invention

[0007] The object of the present invention is to provide a juicer to solve the technical problems of a long power transmission path, large positioning error and high noise.

[0008] In order to solve the above technical problems, the present invention provides a juicer, comprising

[0009] Host;

[0010] A juice extraction component, installed in the main unit, comprising a screw;

[0011] The drive assembly is disposed in the main unit and includes a bracket, wherein the bracket and the upper first shell form a first cavity for accommodating the reducer, and the bracket and the lower second shell form a second cavity for accommodating the motor assembly;

[0012] The drive assembly also includes a power input shaft and a power output shaft. One side of the power input shaft is transmission-connected to the motor assembly, and the other side passes through the bracket and extends into the first cavity and is transmission-connected to the reducer. The power output shaft is offset relative to the center of the bracket and is transmission-connected through the reducer. One end of the power output shaft is installed on the upper end of the bracket, and the other end passes through the first shell and is transmission-connected to the screw.

[0013] Preferably, the reducer includes a reduction double-tooth assembly, an avoidance space is formed between the reduction double-tooth assembly and the power output shaft, the upper end of the power input shaft passes through the bracket and is accommodated in the avoidance space, and the upper end of the power input shaft is provided with an input tooth that engages with the first-stage double teeth of the reduction double-tooth assembly.

[0014] Preferably, the reduction duplex gear assembly includes a second-stage duplex gear meshing with the first-stage duplex gear, the first-stage duplex gear axis, the second-stage duplex gear axis and the power output shaft axis form a triangular transmission area, and the power input shaft extends into the triangular transmission area.

[0015] Preferably, the first-stage duplex teeth include a first large gear meshing with the input gear, and a first small gear coaxially arranged above the first large gear; the reduction duplex teeth assembly includes a second-stage duplex teeth, the second-stage duplex teeth include a second large gear meshing with the first small gear, and a second small gear coaxially arranged above the second large gear, and the second small gear meshes with the transmission teeth sleeved on the outside of the power output shaft.

[0016] Preferably, the reducer includes a reduction duplex gear assembly, which includes a first-stage duplex gear and a second-stage duplex gear engaged with the first-stage duplex gear, the second-stage duplex gear being located above the power input shaft, and the second-stage duplex gear covering the power input shaft; the transmission teeth outside the power output shaft are located above the power input shaft, and the transmission teeth cover the power input shaft.

[0017] Preferably, the reducer includes a reduction duplex gear assembly, the upper end of the power input shaft is provided with input teeth engaged with the first-stage duplex teeth of the reduction duplex gear assembly, the reduction duplex gear assembly includes a second-stage duplex teeth engaged with the first-stage duplex teeth, and the ratio of the triangular transmission area formed by the first-stage duplex gear axis, the second-stage duplex gear axis and the power output shaft axis to the area of ​​the first cavity is 17%-25%.

[0018] Preferably, the upper end surface of the bracket is eccentrically formed with respect to the center to form a first installation cavity for installing a first bearing, the first bearing is sleeved outside the lower end portion of the power output shaft, and the power output shaft passes through the first cavity axially; the central area of ​​the bottom surface of the bracket is formed with a second installation cavity for installing a second bearing, the power input shaft passes through the second bearing and is transmission-connected to the reducer.

[0019] Preferably, the bracket is extended in the direction close to the second shell to form an upper side wall, and the upper side wall has a first snap-fit ​​surface, the first snap-fit ​​surface is the positioning reference surface for the snap-fit ​​connection between the bracket and the first shell, the first mounting cavity is the positioning reference for the installation of the power output shaft and the bracket, and the second mounting cavity is the positioning reference for the installation of the power input shaft and the bracket.

[0020] Preferably, the difference between the outer diameter of the drive assembly and its height does not exceed 20%.

[0021] Preferably, a third mounting cavity for accommodating a third bearing is formed axially through the first shell, and the power output shaft passes through the third bearing on a side away from the bracket; a fourth mounting cavity for accommodating a fourth bearing is formed axially through the second shell, and the power input shaft passes through the fourth bearing on a side away from the bracket and extends out of the second cavity.

[0022] Preferably, the main unit includes an upper shell, and one of the bottom of the upper shell and the first shell is formed with a positioning hole, and the other is formed with a positioning column, and the positioning column is inserted into the positioning hole and locked; the juicer also includes a spring shaft, and the power output shaft is connected to the screw transmission through the spring shaft.

[0023] Preferably, the bracket is extended in a direction close to the second shell to form an upper side wall, the upper side wall has a first buckling surface, and the central axis of the second installation cavity coincides with the central axis of the first buckling surface.

[0024] Preferably, the bracket is extended in a direction close to the second shell to form an upper side wall, the upper side wall has a first fastening surface, and the distance between the central axis of the second installation cavity and the center line of the first fastening surface is 0.05-0.1 mm.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention provides a juicer in which the power output shaft and the reducer are offset relative to the center of the bracket, and the lower end of the power output shaft, the lower ends of each rotating shaft in the reducer, and the upper end of the power input shaft overlap in the axial direction, that is, the space below the first cavity is reused, and the longitudinal and lateral transmission paths of the drive system are not too long, so that the height and radial dimensions of the drive assembly are greatly compressed, and the overall height and radial dimensions of the drive assembly are also greatly reduced; at the same time, because the bracket is both the lower end cover of the reducer and the upper end cover of the motor assembly, it is equivalent to the motor assembly and the reducer being highly integrated to form a drive system assembly. In addition, due to the shortened transmission path due to spatial reuse, the strength of the overall structure is greatly improved, and the drive assembly structure is made compact. At the same time, the bracket can be used as a standardized large component of a drive assembly. As for the changes or replacements in the upper and lower structures of the bracket, it will not affect the setting form of the bracket, which improves the variability of the internal structure of the reducer and the internal structure of the motor assembly, and reduces the number of components that need to be changed, so that it can be matched and applied to different juicers. Furthermore, the power input shaft, power output shaft, and first housing all use the bracket as a positioning reference. During the molding process, the bracket's central axis serves as the machining reference. This common machining reference significantly reduces machining errors, effectively acting as a centering reference using the bracket's central axis. Consequently, power is transferred from the power input shaft to the power output shaft, and then to the screw, significantly improving transmission engagement accuracy, increasing transmission distance reliability, and reducing noise. The output accuracy of the power output shaft is also enhanced, effectively preventing radial disturbances in the screw.

[0027] 2. The setting of the avoidance space realizes the axial spatial overlap of the lower end of the power output shaft, the lower ends of each rotating shaft in the reduction double-tooth assembly, and the upper end of the power input shaft, which greatly compresses the axial space of the first cavity and reduces the overall height of the drive assembly; and the power output shaft and the reduction double-tooth assembly are arranged around the power input shaft in the radial direction, which greatly compresses the radial space and can realize that the maximum outer diameter of the first cavity and the maximum outer diameter of the second cavity are equal or almost the same, that is, the maximum outer diameter of the motor assembly and the maximum outer diameter of the reducer are almost the same, which shortens the power transmission path, greatly reduces resonance, effectively avoids radial disturbance of the screw, and further avoids uneven biting of the material by the screw due to radial disturbance, thereby affecting the juice extraction efficiency; and further contributes to the compact structure of the drive assembly.

[0028] 3. Because the first-stage double-tooth axis, the second-stage double-tooth axis, and the power output shaft axis are surrounded by a triangular transmission area, the power input shaft extends into the triangular transmission area. The triangular transmission area axially covers the power input shaft, further compressing the radial space of the first cavity. This prevents the radial size of the entire drive assembly from being too large, further shortening the radial transmission path of power, and facilitating improved gear meshing accuracy and reduced noise. Furthermore, the ratio of the triangular transmission area to the area of ​​the first cavity is 17%-25%. Without changing the outer diameter of the drive assembly, the area of ​​the triangular transmission area is as large as possible, allowing the outer diameters of the first and second large gears to be increased as much as possible, resulting in greater output torque and greater force output to the screw to grind and extract juice, allowing the screw to grind and extract juice more fully and improve the juice extraction rate.

[0029] 4. The input gear and the first large gear form the first stage of reduction, the first pinion and the first large gear are coaxially arranged to have the same rotational speed, the first pinion and the second large gear form the second stage of reduction, the second pinion and the second large gear are coaxially arranged to have the same rotational speed, and the second pinion and the transmission gear form the third stage of reduction. Power input from the motor assembly via the power input shaft undergoes three stages of reduction before being output to the screw via the power output shaft. Furthermore, the second large gear is located above and covers the power input shaft; the transmission gear is located above and covers the power input shaft. The first large gear, the second large gear, and the transmission gear are highly concentrated within the area where the power input shaft is located. Furthermore, because the first large gear, the second large gear, and the transmission gear overlap each other, the outer diameters of the first large gear, the second large gear, and the transmission gear can be increased as much as possible without changing the radial dimensions of the first cavity. This increases the reduction ratio, outputs greater torque, and delivers greater grinding force to the screw, enabling more efficient juice extraction and improving juice extraction efficiency. Furthermore, this results in a compact structure, reduces resonance in the gear transmission, and effectively compresses the radial space of the drive assembly.

[0030] 5. The lower end of the power output shaft is installed in the first installation cavity through the first bearing, which realizes the axial and radial limiting effect on the power output shaft, avoids shaking, and thus improves the output accuracy of the power output shaft; the second installation cavity can allow the power output shaft to pass through the bracket and extend into the first cavity, and only a part of the power output shaft protrudes from the upper end of the bracket. The protruding height is sufficient as long as the power output shaft and the reducer are engaged and transmitted. The lower end of the power output shaft and the upper end of the power input shaft coincide in the axial direction. Therefore, the lower end of the power output shaft and the upper end of the power input shaft are reused in the space below the first cavity, thereby greatly compressing the axial space of the drive component.

[0031] 6. The first fastening surface on the bracket is the positioning reference surface for the fastening connection between the bracket and the first shell, the first mounting cavity is the positioning reference for the installation of the power output shaft and the bracket, and the second mounting cavity is the positioning reference for the installation of the power input shaft and the bracket; the first fastening surface, the first mounting cavity and the second mounting cavity are all part of the bracket, and the central axis of the bracket is used as the positioning reference during processing, that is, the central axis of the bracket is used as the positioning reference for centering. The same positioning reference reduces the processing error; and makes the difference between the input teeth and the transmission teeth of the reducer smaller, and the meshing between the gears will not be too deep or too shallow, so that the reducer transmitted between the power input shaft and the power output shaft has better meshing accuracy, reduces the noise generated by gear meshing, and the transmission is reliable. Secondly, when the first shell and the bracket are assembled, the first fastening surface is used as a positioning reference, which reduces the assembly error of the first shell and the bracket; the central axis of the second mounting cavity and the central axis of the first fastening surface coincide or almost coincide, and the first mounting cavity and the first fastening surface are integrated on the bracket, so that the coaxiality of the second mounting cavity and the first fastening surface is greatly improved, and power is input from the power input shaft to the power output shaft through the first shell to output power to the screw. The entire transmission path has high meshing accuracy, and the transmission is more reliable and low in noise.

[0032] 7. Since the difference between the outer diameter and the height of the driving component does not exceed 20%, that is, the maximum outer diameter of the driving component and its height are almost equal, the axial and radial space of the first cavity are greatly compressed, and the lateral or longitudinal transmission path of the reducer will not be too long. It is not necessary to sacrifice the axial height to achieve radial size compression, nor is it necessary to sacrifice the radial height to achieve axial size compression. Since the power transmission path is shortened, the resonance is greatly reduced, and radial disturbance of the screw is effectively avoided. It is further avoided that the screw bites unevenly due to radial disturbance, thereby improving the juice extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] FIG1 is a schematic cross-sectional view of a juice extractor according to one embodiment of the present invention.

[0035] FIG2 is a schematic structural diagram of the drive assembly shown in FIG1 .

[0036] FIG3 is an exploded schematic diagram of the drive assembly shown in FIG2 .

[0037] FIG4 is a schematic structural diagram of the reduction duplex gear assembly, the bracket, the second housing, the power input shaft, and the power output shaft in the drive assembly shown in FIG2 .

[0038] FIG5 is a schematic cross-sectional view of the drive assembly shown in FIG2 .

[0039] FIG6 is an exploded schematic diagram of the feed barrel, the juicing assembly and the pre-cutting assembly in the juicer of the present invention.

[0040] FIG7 is a schematic structural diagram of a juice extractor according to one embodiment of the present invention.

[0041] FIG8 is a cross-sectional schematic diagram of one viewing angle shown in FIG7 .

[0042] FIG9 is a cross-sectional schematic diagram of a juice extractor according to another embodiment of the present invention.

[0043] The names of the components in the figure are as follows: 1. Main unit; 11. Upper shell; 12. Lower shell; 13. Mounting slot; 2. Juicing assembly; 21. Screw; 22. Juicer; 23. Juice collecting cylinder; 231. Baffle; 24. Juice collecting cup; 25. Juice outlet channel; 26. Slag outlet channel; 3. Drive assembly; 31. Bracket; 311. First mounting cavity; 312. Second mounting cavity; 313. Third mounting cavity; 314. Fourth mounting cavity; 315. Upper side wall; 316. First fastening surface; 317. Lower side wall; 32. First shell; 33. Second shell; 34. First cavity; 35. Second cavity; 36. Motor assembly; 37. Reducer; 371. First large gear; 372. First small gear; 373. Second large gear; 374. Second small gear; 375. Transmission gear; 376. Input gear; 38. Power input shaft; 39. Power output shaft; 5. Elastic shaft; 61. Press plate; 62. First cutting edge; 63. Second cutting edge; 64. Feed barrel; 7. Control panel. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] 1 to 8 , an embodiment of the present invention provides a juicer, including a main unit 1 , a feed barrel 64 , a drive assembly 3 , a juice extraction assembly 2 , and a pre-cutting assembly.

[0046] The juice extraction component 2 is installed in the main unit 1, and the juice extraction component 2 includes a screw 21. The drive component 3 is arranged in the main unit 1, and the drive component 3 includes a bracket 31. The bracket 31 and the upper first shell 32 are surrounded by a first cavity 34 for accommodating a reducer 37, and the bracket 31 and the lower second shell 33 are surrounded by a second cavity 35 for accommodating a motor assembly 36; the drive component 3 also includes a power input shaft 38 and a power output shaft 39. One side of the power input shaft 38 is transmission-connected to the motor assembly 36, and the other side passes through the bracket 31 and extends into the first cavity 34 and is transmission-connected to the reducer 37. The power output shaft 39 is offset relative to the power input shaft 38 and is transmission-connected through the reducer 37. One end of the power output shaft 39 is installed at the upper end of the bracket 31, and the other end is transmission-connected to the screw 21.

[0047] It can be understood that since the power output shaft 39 and the reducer 37 are offset relative to the center of the bracket 31, the lower end of the power output shaft 39, the lower ends of each rotating shaft in the reducer 37 and the upper end of the power input shaft 38 overlap in the axial direction, that is, the reuse of the space below the first cavity 34 is realized, and the longitudinal and transverse transmission paths of the drive system will not be too long, so that the height and radial dimensions of the drive assembly are greatly compressed, and the overall height and radial dimensions of the drive assembly 3 are also greatly reduced; at the same time, since the bracket 31 is both the lower end cover of the reducer 37 and the upper end cover of the motor assembly 36, it is equivalent to the motor assembly 36 and the reducer 37 being highly integrated to form a drive system assembly, and since the space reuse shortens the transmission path, the strength of the overall structure is greatly improved, and the drive assembly structure is compact.

[0048] The motor assembly 36 and the reducer 37 are highly integrated through the bracket 31. The motor assembly 36 and the reducer 37 form the smallest unit of the drive assembly 3 for independent operation. The reducer 37 and the motor assembly 36 share a component. The bracket 31 can be integrated and reused, reducing accessories and simplifying the installation of the entire machine. At the same time, the bracket 31 can be used as a standardized large component of the drive assembly 3. As for the changes or replacements in the upper and lower structures of the bracket 31, it will not affect the setting form of the bracket 31, which improves the variability of the internal structure of the reducer 37 and the internal structure of the motor assembly 36, and also reduces the number of components that need to be changed, and can be matched and applied to different juicers.

[0049] Power input shaft 38 passes through bracket 31, and power output shaft 39 is mounted on the upper end of bracket 31. Bracket 31 is connected to first housing 32. Power input shaft 38, power output shaft 39, and first housing 32 are all assembled on bracket 31. That is, power input shaft 38, power output shaft 39, and first housing 32 all use bracket 31 as a positioning reference. During the molding process, the central axis of bracket 31 is used as a machining reference. This common machining reference significantly reduces machining errors, equivalent to using the central axis of bracket 31 as a positioning reference for centering. Therefore, power is input from power input shaft 38 to power output shaft 39, and then transmitted to screw 21. This significantly improves transmission engagement accuracy, enhances transmission distance reliability, reduces noise, and improves the output accuracy of power output shaft 39, thereby effectively preventing radial disturbances in screw 21.

[0050] Furthermore, the difference between the outer diameter and height of the drive assembly 3 does not exceed 20%, that is, the maximum outer diameter of the drive assembly 3 is almost equal to its height, which greatly compresses the axial and radial space of the first cavity 34. The transverse or longitudinal transmission path of the reducer 37 will not be too long. It is not necessary to sacrifice the axial height to achieve radial size compression, nor is it necessary to sacrifice the radial height to achieve axial size compression. Since the power transmission path is shortened, the resonance is greatly reduced, and the radial disturbance of the screw 21 is effectively avoided, and the screw 21 is further prevented from biting the material unevenly due to the radial disturbance, thereby affecting the juice extraction efficiency.

[0051] It should be noted that the difference between the outer diameter and height of the drive assembly 3 does not exceed 20%, that is, the ratio of the outer diameter to the height of the drive assembly 3 is 0.8-1.2. Preferably, the outer diameter of the drive assembly 3 is 92 mm, and the height of the drive assembly 3 is 92 mm. When the number of reduction stages of the reducer 37 decreases, the outer diameter of the reduction gears increases accordingly, which means that the outer diameter of the drive assembly 3 may be larger than the height of the drive assembly 3, but the outer diameter of the drive assembly 3 will not exceed 1.2 times the height of the drive assembly 3. When a high torque output is required, the height of the motor assembly 36 needs to be increased accordingly, which means that the height of the drive assembly 3 may be larger than the outer diameter of the drive assembly 3. Alternatively, when the number of reduction stages of the reducer 37 increases, the height of the reduction gears needs to be increased accordingly, which means that the height of the drive assembly 3 may be larger than the outer diameter of the drive assembly 3, but the height of the drive assembly 3 will not exceed 1.2 times the outer diameter of the drive assembly 3. The motor assembly can use a brushless motor, whose speed can be controlled according to the hardness of the food, providing adaptive food identification. Different ingredients are automatically matched to different speed settings. For example, hard fruits generate high loads, while soft fruits require slower, higher-torque processing. Therefore, the brushless motor and its inherent speed regulation significantly improve juice yield and enhance the taste. Furthermore, the main control board measures the power required for processing the material and automatically selects the brushless motor speed based on the material. The brushless motor itself is low-noise, and combined with the aforementioned improved gear meshing precision, this further reduces the noise level of the drive assembly, resulting in a quieter overall machine and a better user experience.

[0052] As shown in Figures 1 and 5 , to facilitate the installation of the power output shaft 39 and the power input shaft 38 on the bracket 31, a first mounting cavity 311 is formed on the upper end surface of the bracket 31, eccentrically relative to the center, for mounting a first bearing. The first bearing is sleeved outside the lower end of the power output shaft 39, which axially extends through the first cavity 34. A second mounting cavity 312 is formed in the central area of ​​the bottom surface of the bracket 31 for mounting a second bearing. The power input shaft 38 passes through the second bearing and is in transmission connection with the reducer 37. It should be noted that if the bracket 31 is circular, the first mounting cavity 311 is eccentric relative to the central axis of the circle. If the bracket 31 is pear-shaped or other non-circular shape, with three points evenly distributed along the circumference of the bracket, the lines connecting the three points forming a triangle, then the first mounting cavity 311 is eccentric relative to the central axis of the circumcircle of the triangle. The second mounting cavity 312 is located in the central area of ​​the bottom surface of the bracket 31, that is, the second mounting cavity 312 is located at the center of the bracket 31, that is, at or slightly off-center.

[0053] It is understandable that the first mounting cavity 311 can be a blind hole, and the lower end of the power output shaft 39 is mounted in the first mounting cavity 311 through the first bearing, thereby achieving axial and radial limiting of the power output shaft 39, avoiding shaking, and thereby improving the output accuracy of the power output shaft 39. The second mounting cavity 312 can be a through hole, allowing the power output shaft 39 to pass through the bracket 31 and extend into the first cavity 34. Only a portion of the power output shaft 39 protrudes from the upper end of the bracket 31, and the height of the protrusion is sufficient to achieve meshing transmission between the power output shaft 39 and the reducer 37. The lower end of the power output shaft 39 and the upper end of the power input shaft 38 overlap in the axial direction, thereby achieving the reuse of the lower end of the power output shaft 39 and the upper end of the power input shaft 38 in the space below the first cavity 34, greatly compressing the axial space of the drive assembly 3.

[0054] Furthermore, a third mounting cavity 313 for accommodating a third bearing is formed axially through the first shell 32. The power output shaft 39 passes through the third bearing on the side away from the bracket 31. The power output shaft 39 is installed in the third mounting cavity 313 through the third bearing. The first bearing and the third bearing are two supporting positioning points of the power output shaft 39. The first cavity 34 supports the two supporting positioning points of the first bearing and the third bearing to prevent the power output shaft 39 from swaying and avoid radial disturbance of the screw 21, so that the transmission system is stable and reliable. The second shell 33 is axially penetrated to form a fourth mounting cavity 314 for installing a fourth bearing. The power input shaft 38 passes through the fourth bearing on the side away from the bracket 31 and extends to the outside of the second cavity 35. The power input shaft 38 is installed in the fourth mounting cavity 314 through the fourth bearing. The second bearing and the fourth bearing are two supporting positioning points of the power input shaft 38. The second cavity 35 supports the two supporting positioning points of the second bearing and the fourth bearing to prevent the power input shaft 38 from swaying, making the transmission system stable and reliable and improving the gear meshing accuracy. The third mounting cavity 313 and the fourth mounting cavity 314 can both be set through.

[0055] Furthermore, in order to realize that the power input shaft 38, the power output shaft 39 and the first shell 32 are positioned with the bracket 31 as a positioning reference, the bracket 31 is extended in the direction close to the second shell 33 to form an upper side wall 315, and the upper side wall 315 has a first snap-fit ​​surface 316. The first snap-fit ​​surface 316 is the positioning reference surface for the snap-fit ​​connection between the bracket 31 and the first shell 32. The first mounting cavity 311 is the positioning reference for the installation of the power output shaft 39 and the bracket 31, and the second mounting cavity 312 is the positioning reference for the installation of the power input shaft 38 and the bracket 31.

[0056] It is understood that the first engaging surface 316, the first mounting cavity 311, and the second mounting cavity 312 are all part of the bracket 31 and are all positioned relative to the central axis of the bracket 31 during machining. This common positioning reference minimizes machining errors. The error between the input teeth 376 and the transmission teeth 375 of the reducer 37 is minimal, ensuring that the meshing between the gears is neither too deep nor too shallow. This ensures that the reducer 37, which transmits power between the power input shaft 38 and the power output shaft 39, has good meshing accuracy, reduces noise generated by gear meshing, and ensures reliable transmission. In addition, when the first shell 32 and the bracket 31 are assembled, the first fastening surface 316 is used as a positioning reference, which reduces the assembly error of the first shell 32 and the bracket 31; at the same time, the central axis of the second mounting cavity 312 coincides with the central axis of the first fastening surface 316, or the distance between the central axis of the second mounting cavity 312 and the center line of the first fastening surface 316 is 0.05-0.1mm, that is, the central axis of the second mounting cavity 312 coincides with or almost coincides with the central axis of the first fastening surface 316, and the first mounting cavity 311 and the first fastening surface 316 are integrated on the bracket 31, so that the coaxiality of the second mounting cavity 312 and the first fastening surface 316 is greatly improved, and power is input from the power input shaft 38 to the power output shaft 39 through the first shell 32 to output power to the screw 21. The entire transmission path has high meshing accuracy, the transmission is more reliable and the noise is low, and it also effectively prevents radial disturbance of the screw 21.

[0057] As shown in Figures 2-5, the specific embodiment of the snap-fit ​​connection between the bracket 31 and the first shell 32 is as follows: the bracket 31 has an upper side wall 315 that snaps together with the first shell 32. The upper side wall 315 is arranged in a circular shape along the upper end surface of the bracket 31. The shape of the upper side wall 315 is adapted to the first shell 32 and can be "round" or "pear-shaped". The first shell 32 is formed with a second snap-fit ​​surface, and the first snap-fit ​​surface 316 is a stop, so that the second snap-fit ​​surface abuts the first snap-fit ​​surface 316. Specifically, the first snap-fit ​​surface 316 can be a groove, and the second snap-fit ​​surface can be a stop step that abuts the groove; alternatively, the first snap-fit ​​surface 316 is a stop step, and the second snap-fit ​​surface is a groove.

[0058] As shown in Figures 3-5, in order to compress the axial space of the drive assembly 3, the reducer 37 includes a reduction duplex gear assembly. A clearance space is formed between the reduction duplex gear assembly and the power output shaft 39. The upper end of the power input shaft 38 passes through the bracket 31 and is accommodated in the clearance space. The clearance space only needs to be large enough for the power input shaft 38 to extend into. The upper end of the power input shaft 38 is provided with input teeth 376 that mesh with the first-stage duplex teeth of the reduction duplex gear assembly. In the radial direction, the power output shaft 39 and the reduction duplex gear assembly are arranged around the power input shaft 38, greatly compressing the radial space. At the same time, the provision of the clearance space enables the lower end of the power output shaft 39, the lower ends of each rotating shaft in the reduction duplex gear assembly, and the upper end of the power input shaft 38 to overlap in the axial direction, greatly compressing the axial space of the first cavity 34 and reducing the overall height of the drive assembly 3. Furthermore, an avoidance space is provided to achieve compression of the axial and radial spaces of the drive assembly 3, so that the ratio of the radial dimensions of the first cavity 34 to the radial dimensions of the second cavity 35 is 1:0.8-1:1.1, and the maximum outer diameter of the first cavity 34 and the maximum outer diameter of the second cavity 35 are equal or almost the same size, that is, the maximum outer diameter of the motor assembly 36 and the maximum outer diameter of the reducer 37 are almost the same, and there is no need to sacrifice the axial height to achieve radial dimension compression, nor is there a need to sacrifice the radial height to achieve axial dimension compression, so that the power transmission path is shortened, the resonance is greatly reduced, and the radial disturbance of the screw 21 is effectively avoided, and the screw 21 is further prevented from biting the material unevenly due to the radial disturbance, thereby affecting the juice extraction efficiency. It should be noted that when the number of stages of the reducer is small, the maximum outer diameter of the first cavity is slightly larger than the maximum outer diameter of the second cavity, and the ratio of the maximum outer diameter of the first cavity to the radial dimension of the second cavity can reach 1:0.8; and according to the requirements of the motor assembly or the output parameters of the reducer, the ratio of the radial dimension of the first cavity to the radial dimension of the second cavity can reach 1:1.1.

[0059] As a preferred embodiment, the power input shaft 38 is disposed in the center of the bracket 31. That is, the power input shaft 38 can be located in the exact center of the bracket 31, or slightly offset therefrom. This allows the power output shaft 39 and the various rotating shafts in the reduction duplex gear assembly to be concentrated in or near the center of the bracket 31. Therefore, without changing the radial dimensions of the first cavity, the outer diameter of the large gear in the reduction duplex gear assembly can be increased, thereby increasing the reduction ratio, outputting greater torque, and also outputting greater grinding force to the screw 21, allowing the screw 21 to grind and extract juice more fully and improve the juice extraction rate. This also results in a compact structure, reduces resonance in the gear transmission, and effectively compresses the radial space of the drive assembly 3.

[0060] As shown in Figures 3-5, when two duplex teeth are provided, the reduction duplex tooth assembly includes a second-stage duplex tooth meshing with the first-stage duplex tooth. The axis of the first-stage duplex tooth, the axis of the second-stage duplex tooth, and the axis of the power output shaft 39 form a triangular transmission area. The power input shaft 38 extends into the triangular transmission area. The triangular transmission area axially covers the power input shaft 38, thereby compressing the radial space of the first cavity 34. This prevents the radial dimension of the entire drive assembly 3 from being excessive, shortens the radial transmission path of power, greatly reduces resonance, effectively prevents radial disturbances in the screw 21, and further prevents uneven material engagement caused by radial disturbances in the screw 21, thereby affecting juice extraction efficiency. In other embodiments, the number of duplex teeth provided can be adjusted according to the desired settings of parameters such as the reduction ratio, torque, and output speed. The number of duplex teeth can be set to greater than two.

[0061] Furthermore, the ratio of the area of ​​the triangular transmission area to the area of ​​the first cavity 34 is 17%-25%. In other words, without changing the outer diameter of the drive assembly 3, the area of ​​the triangular transmission area is as large as possible, so that the outer diameters of the first large gear 371 and the second large gear 373 can be increased as much as possible, thereby increasing the output torque and the force output to the screw 21 to grind the juice more fully, thereby improving the juice extraction rate.

[0062] The specific meshing arrangement of the reduction duplex gear assembly is as follows: the first-stage duplex gear assembly includes a first large gear 371 meshing with the input gear 376 and a first small gear 372 coaxially disposed above the first large gear 371. The second-stage duplex gear assembly includes a second large gear 373 meshing with the first small gear 372 and a second small gear 374 coaxially disposed above the second large gear 373. The second small gear 374 meshes with a transmission gear 375 sleeved on the exterior of the power output shaft 39. The input gear 376 and the first large gear 371 form the first stage of reduction. The first small gear 372 and the first large gear 371 are coaxially arranged to rotate at the same speed. The first small gear 372 and the second large gear 373 form the second stage of reduction. The second small gear 374 and the second large gear 373 are coaxially arranged to rotate at the same speed. The second small gear 374 and the transmission gear 375 form the third stage of reduction. The power input from the motor assembly 36 via the power input shaft 38 undergoes three stages of reduction before being output to the screw 21 via the power output shaft 39. It should be noted that the input teeth, first-stage duplex teeth, second-stage duplex teeth and transmission teeth are all helical gears with high meshing precision and low noise.

[0063] Specifically, as shown in Figures 3-5, the second large gear 373 is located above the power input shaft 38, with a portion of the second large gear 373 covering a portion of the first large gear 371. The transmission teeth 375 are located above the power input shaft 38, with a portion of the transmission teeth 375 covering the first large gear 371 and the second large gear 373. This highly concentrates the first large gear 371, the second large gear 373, and the transmission teeth 375 within the area where the power input shaft 38 is located. Furthermore, because the first large gear 371, the second large gear 373, and the transmission teeth 375 overlap each other, the outer diameters of the first large gear 371, the second large gear 373, and the transmission teeth 375 can be increased as much as possible without changing the radial dimensions of the first cavity. This increases the reduction ratio, outputs greater torque, and delivers greater grinding force to the screw 21, allowing the screw 21 to more fully grind and extract juice, thereby improving the juice extraction rate. Furthermore, this also results in a compact structure, reduces resonance in the gear transmission, and more effectively compresses the radial space of the drive assembly 3.

[0064] Specific installation of the motor assembly 36: As shown in Figures 3 to 5, the lower end of the bracket 31 is the upper end cover of the motor assembly 36, and the second shell 33 is the lower end cover of the motor assembly 36. The bracket 31 and the second shell 33 are arranged to form a second cavity 35. The motor assembly 36 includes a stator winding assembly and a rotor assembly installed in the second cavity 35. Specifically, the bracket 31 has a lower side wall 317 arranged around the bottom surface, and the bottom surface of the bracket 31 and the lower side wall 317 can be integrally formed. The second shell 33 has a panel that is detachably connected to the lower side wall 317. The panel is arranged around and adapted to the shape of the lower side wall 317, and can be "round" or "pear-shaped". The bolts pass through the panel, the avoidance groove on the outer surface of the stator core, and the lower side wall 317 in sequence, locking the lower side wall 317 and the panel, so that the stator winding assembly and the rotor assembly are stably installed in the second cavity 35.

[0065] Furthermore, a mounting gap is defined between the opening of the lower sidewall 317 and the opening of the enclosure. The stator winding assembly includes a stator core, which is at least partially exposed within the mounting gap. Positioning protrusions are provided within the lower sidewall 317, abutting against the stator core to axially limit the stator winding assembly. The lower sidewall 317 and the enclosure limit the stator winding assembly radially. It will be appreciated that this prevents contact and over-positioning between the lower sidewall 317 and the second housing 33, while also providing ample space for the rotor assembly and stator winding assembly to be positioned securely.

[0066] As shown in Figures 1, 7, and 8, in order to hoist the first shell 32 into the main unit 1, the main unit 1 includes an upper shell 11 arranged on the side close to the feed barrel 64, and a lower shell 12 detachably connected to the upper shell 11. In this embodiment, a positioning hole is formed at the bottom of the upper shell 11, and a positioning column is formed on the first shell 32. The positioning column is inserted into the positioning hole and locked together, so that the first shell 32 is installed and fixed to the bottom of the upper shell 11. The juicer also includes a spring shaft 5, and the power output shaft 39 is transmission-connected to the screw 21 through the spring shaft 5. An elastic member is provided between the spring shaft 5 and the power output shaft 39, and the spring shaft 5 can move up and down. When the screw 21 is installed in place, the spring is compressed. The spring shaft 5 and the elastic member are provided to facilitate the installation and alignment of the screw 21. In other embodiments, a positioning column is formed at the bottom of the upper shell 11, and a positioning hole is formed on the first shell 32.

[0067] The motor assembly 36 in the drive assembly 3, after being decelerated by the reducer 37, provides rotational driving force for the screw 21. The feed barrel 64 is mounted above the juice extraction assembly 2. The lower housing 12 has a first cavity. The juice extraction assembly 2 is mounted within the upper housing 11 and disposed below the feed barrel 64. The drive assembly 3 is fixed to the bottom of the upper housing 11 and is located within the first cavity. The upper housing 11 defines a second cavity for mounting the juice extraction assembly 2. The volume of one of the first cavity and the second cavity is less than or equal to the volume of the second cavity. The lower housing 12 has a third cavity spaced apart from the first cavity. The drive assembly 3 is hoisted within the lower housing 12. The juicer also includes a juice receiving cup 24 mounted within the third cavity. The juice extraction assembly 2 is connected to the juice receiving cup 24 via a juice outlet channel 25. Mounting the juice receiving cup 24 within the main unit 1 shortens the juice outlet path and highly concentrates the juice outlet system within the main unit 1.

[0068] Specifically, as shown in Figures 6-8, the juicing assembly 2 includes a juicer 22, a screw 21, and a juice collecting barrel 23. The juicer 22 is sleeved outside the screw 21 and cooperates with the screw 21 to grind and squeeze out juice. The juice collecting barrel 23 is sleeved outside the juicer 22. A juice extraction net is formed on the bottom surface of the juice collecting barrel 23. The juicer 22 and the juice extraction net are inserted into each other to filter the juice. A juice collecting chamber is formed between the juice collecting barrel 23 and the juice extraction net. One end of the juice outlet channel 25 is connected to the juice collecting chamber, and the other end is connected to the juice receiving cup 24. The juice outlet channel 25 is arranged at an angle, so that the juice has an inclined downward travel in space, and the juice is discharged more quickly under the support of gravity. A slag discharge channel 26 is located at the bottom of the juice collecting barrel 23, connecting to the bottom of the screw 21. The slag discharge section below the screw 21 discharges the remaining slag after extrusion to the bottom of the juice collecting barrel 23, where it is then discharged through the slag discharge channel 26 to the slag receiving cup. The slag discharge channel 26 is arranged horizontally, allowing the slag to flow vertically downward. A mounting slot 13 is formed between the lower shell 12 and the upper shell 11. This slot provides space for the slag discharge channel 26 during installation and allows it to extend outside the main unit 1 once the juice extraction assembly 2 is in place.

[0069] More specifically, a baffle 231 is circumferentially disposed at the bottom of the juice collecting barrel 23. A cavity is formed between the inner sidewall of the baffle 231, the bottom of the second housing 33, and the lower surface of the juice collecting barrel 23. One end of the slag discharge channel 26 extends into the cavity and communicates with the bottom of the screw 21, while the other end communicates with the external slag receiving cup. One side of the juice discharge channel 25 extends outward through the cavity. The baffle 231 provides space for the slag discharge channel 26 and the juice discharge channel 25. It also prevents the juicing assembly 2 and the drive assembly 3 from being too close together, which could affect the stability of the juicing assembly 2 and thus prevent radial disturbances in the screw 21.

[0070] The pre-cutting assembly includes a pressure plate 61, a first cutting edge 62 and a second cutting edge 63. The first cutting edge 62 and the second cutting edge 63 both extend into the feed barrel 64. The first cutting edge 62 is arranged above the second cutting edge 63. The pressure plate 61 is installed between the screw 21 and the second cutting edge 63. The first cutting edge 62 and the second cutting edge 63 can be formed into one body and rotate at the same speed.

[0071] Specifically, the first cutting edge 62 spirals upward, forming a horn-like shape that guides the cut juice material downward. The upper end of the first cutting edge 62 is shaped like a pointed hook, with a decreasing cross-section toward the end. The first cutting edge 62 is used to pierce or chop the material fed into the feed barrel 64, performing a primary cut. The second cutting edge 63 cooperates with the pressure plate 61 to form a shearing surface, which provides a secondary shearing effect on the material, reducing its particle size upon entry into the screw 21. This improves the screw 21's efficiency in engaging the material and, consequently, enhances juice extraction efficiency.

[0072] A control panel 7 is mounted on the exterior of the lower housing 12 of the main unit 1 for user operation. The main unit 1 also houses a main control board, which is electrically connected to the motor assembly 36 and controls it. A magnetic switch is also installed within the main unit 1 to detect whether the juice extraction assembly 2 is properly installed, significantly enhancing the safety of the juicer.

[0073] In another embodiment, as shown in FIG9 , the difference from the previous embodiment lies in that, when a single duplex tooth system is provided, the first-stage duplex tooth system includes a first large gear 371 meshing with the input tooth 376, a first small gear 372 coaxially disposed with the first large gear 371, and the first small gear 372 meshing with the transmission tooth 375, which is sleeved and fixed to the outside of the power output shaft 39. The power input from the motor assembly 36 via the power input shaft 38 undergoes a two-stage reduction before being output to the screw 21 via the power output shaft 39. The axial projection of part of the transmission teeth 375 covers the first large gear 371 and the power input shaft 38, highly concentrating the first large gear 371 and the transmission teeth 375 in the area where the power input shaft 38 is set. Without changing the radial size of the first cavity, the outer diameter of the first large gear 371 and the transmission teeth 375 can be increased as much as possible, thereby increasing the reduction ratio, outputting greater torque, and outputting greater force to the screw 21 to grind and extract juice, allowing the screw 21 to grind and extract juice more fully and improve the juice extraction rate; it also makes the structure compact, reduces the resonance in the gear transmission, and can more effectively compress the radial space of the drive assembly 3. It should be noted that compared with the three-stage reduction in the previous embodiment, the two-stage reduction requires a larger outer diameter of the first large gear 371 to meet the reduction ratio requirements. The two-stage reduction can further compress the axial space, and accordingly, the radial size of the first cavity 34 needs to be increased. For other contents, please refer to the previous embodiment and will not be repeated here.

[0074] In yet another embodiment, referring to Figures 1 to 5 , the embodiment of the present invention differs from the first embodiment in that it provides a drive assembly 3 for a food processor, comprising a bracket 31, a motor assembly 36, a reducer 37, a power input shaft 38, and a power output shaft 39. The food processor may be a juicer, a blender, a wall-breaking machine, a soymilk maker, or the like.

[0075] The bracket 31 and the upper first housing 32 enclose a first cavity 34 for accommodating a reducer 37, and the bracket 31 and the lower second housing 33 enclose a second cavity 35 for accommodating a motor assembly 36. A power input shaft 38 is drivingly connected to the motor assembly 36 on one side, while the other side passes through the bracket 31, extends into the first cavity 34, and is drivingly connected to the reducer 37. A power output shaft 39 is offset from the power input shaft 38 and is drivingly connected through the reducer 37. One end of the power output shaft 39 is mounted on the upper end of the bracket 31, and the other end is drivingly connected to an external food processing unit.

[0076] It is understood that because the power output shaft 39 and the reducer 37 are offset relative to the power input shaft 38, the lower end of the power output shaft 39, the lower ends of the rotating shafts in the reducer 37, and the upper end of the power input shaft 38 overlap axially. This allows for reuse of the space below the first cavity 34, reduces the overall height of the drive assembly 3, and ensures that the difference between the outer diameter and height of the drive assembly 3 does not exceed 20%. In other words, the maximum outer diameter and height of the drive assembly 3 are nearly equal, significantly reducing the axial and radial space within the first cavity 34. The transmission path of the reducer 37 is neither excessively long nor excessively long, eliminating the need to sacrifice either axial height or radial height to achieve radial dimension reduction. Due to the shortened power transmission path, resonance is significantly reduced, effectively preventing radial disturbances caused by external food processing components. At the same time, since the bracket 31 is both the lower end cover of the reducer 37 and the upper end cover of the motor assembly 36, it is equivalent to a high integration of the motor assembly 36 and the reducer 37 to form a drive system assembly. In addition, due to the spatial reuse, the transmission path is shortened, the strength of the overall structure is greatly improved, and the drive assembly structure is made compact.

[0077] The motor assembly 36 and the reducer 37 are highly integrated through the bracket 31. The motor assembly 36 and the reducer 37 form the smallest unit of the drive assembly 3 for independent operation. The reducer 37 and the motor assembly 36 share a component. The bracket 31 can be integrated and reused, reducing accessories and simplifying the installation of the entire machine. At the same time, the bracket 31 can be used as a standardized large component of the drive assembly 3. As for the changes or replacements in the upper and lower structures of the bracket 31, it will not affect the setting form of the bracket 31, which improves the variability of the internal structure of the reducer 37 and the internal structure of the motor assembly 36, and also reduces the number of components that need to be changed, and can be matched and applied to different juicers.

[0078] Power input shaft 38 passes through bracket 31, and power output shaft 39 is mounted on the upper end of bracket 31. Bracket 31 is connected to first housing 32. Power input shaft 38, power output shaft 39, and first housing 32 are all assembled on bracket 31. Specifically, power input shaft 38, power output shaft 39, and first housing 32 all use bracket 31 as a positioning reference. During the molding process, the central axis of bracket 31 is used as a machining reference. This common machining reference significantly reduces machining errors, effectively serving as a centering positioning reference using the central axis of bracket 31. Therefore, power is input from power input shaft 38 to power output shaft 39, which transmits power to the external food processing components. This significantly improves transmission engagement accuracy, enhances transmission distance reliability, reduces noise, and enhances the output accuracy of power output shaft 39. For further details, please refer to Example 1 and will not be repeated here.

[0079] In addition to the preferred embodiments described above, the technical solutions protected by the present invention are not limited to the above embodiments. It should be noted that the combination of multiple technical solutions in any one embodiment, as well as the combination of the technical solution of any one embodiment with the technical solutions in one or more other embodiments, are within the scope of protection of the present invention. Although the present invention has been described in detail above using general descriptions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A juicer, characterized in that, including a main body; a juice extraction assembly installed inside the main body and including a screw; a drive assembly disposed inside the main body and including a bracket. The bracket and the upper first housing enclose a first cavity for accommodating a speed reducer, and the bracket and the lower second housing enclose a second cavity for accommodating a motor assembly; The drive assembly further includes a power input shaft and a power output shaft. One side of the power input shaft is in transmission connection with the motor assembly, and the other side extends through the bracket into the first cavity and is in transmission connection with the speed reducer. The power output shaft is disposed eccentrically relative to the center of the bracket and is in transmission connection through the speed reducer. One end of the power output shaft is installed at the upper end of the bracket, and the other end passes through the first housing and is in transmission connection with the screw.

2. The juicer according to claim 1, wherein The speed reducer includes a reduction double gear assembly. An avoidance space is formed between the reduction double gear assembly and the power output shaft. The upper end of the power input shaft passes through the bracket and is accommodated in the avoidance space. An input gear is provided at the upper end of the power input shaft and meshes with the first-stage double gear of the reduction double gear assembly.

3. The juice extractor according to claim 2, wherein, The reduction double gear assembly includes a second-stage double gear meshing with the first-stage double gear. A triangular transmission area is formed by enclosing the axis of the first-stage double gear, the axis of the second-stage double gear, and the axis of the power output shaft. The power input shaft extends into the triangular transmission area.

4. The juicer according to claim 2, characterized in that, The first-stage double gear includes a first large gear meshing with the input gear and a first small gear coaxially disposed above the first large gear; the reduction double gear assembly includes a second-stage double gear. The second-stage double gear includes a second large gear meshing with the first small gear and a second small gear coaxially disposed above the second large gear. The second small gear meshes with a transmission gear sleeved outside the power output shaft.

5. The juice extractor according to claim 1, wherein The speed reducer includes a reduction double gear assembly. The reduction double gear assembly includes a first-stage double gear and a second-stage double gear meshing with the first-stage double gear. The second-stage double gear is located above the power input shaft and covers the power input shaft; the transmission gear outside the power output shaft is located above the power input shaft and covers the power input shaft.

6. The juicer according to claim 1, characterized in that, The speed reducer includes a reduction double gear assembly. An input gear is provided at the upper end of the power input shaft and meshes with the first-stage double gear of the reduction double gear assembly. The reduction double gear assembly includes a second-stage double gear meshing with the first-stage double gear. The ratio of the area of the triangular transmission area formed by enclosing the axis of the first-stage double gear, the axis of the second-stage double gear, and the axis of the power output shaft to the area of the first cavity is 17%-25%.

7. The juice extractor according to claim 1, wherein, A first installation cavity for installing a first bearing is eccentrically formed on the upper end surface of the bracket relative to the center. The first bearing is sleeved outside the lower end of the power output shaft. The power output shaft axially penetrates through the first cavity; a second installation cavity for installing a second bearing is formed in the central area of the bottom surface of the bracket. The power input shaft passes through the second bearing and is in transmission connection with the speed reducer.

8. The juicer according to claim 7, characterized in that, The bracket extends in a direction close to the second shell to form an upper side wall, and the upper side wall has a first fastening surface. The first fastening surface is a positioning reference surface for the fastening connection between the bracket and the first shell. The first mounting cavity is a positioning reference for the installation of the power output shaft and the bracket, and the second mounting cavity is a positioning reference for the installation of the power input shaft and the bracket.

9. The juice extractor according to claim 1, characterized in that, The difference between the outer diameter of the drive assembly and its height does not exceed 20%.

10. The juicer according to claim 1, characterized in that, A third mounting cavity for accommodating a third bearing is formed through the axial direction of the first shell, and the power output shaft passes through the third bearing on a side away from the bracket; a fourth mounting cavity for accommodating a fourth bearing is formed through the axial direction of the second shell, and the power input shaft passes through the fourth bearing on a side away from the bracket and extends out of the second cavity.

11. The juicer according to claim 1, characterized in that, The main unit includes an upper shell, and one of the bottom of the upper shell and the first shell is formed with a positioning hole, and the other is formed with a positioning column, and the positioning column is inserted into the positioning hole and locked; the juicer also includes a spring shaft, and the power output shaft is connected to the screw transmission through the spring shaft.

12. The juice extractor according to claim 7, wherein, The bracket is extended in a direction close to the second shell to form an upper side wall, the upper side wall has a first buckling surface, and the central axis of the second installation cavity coincides with the central axis of the first buckling surface.

13. The juice extractor according to claim 7, characterized in that, The bracket extends toward the second shell to form an upper side wall, the upper side wall has a first buckling surface, and the distance between the central axis of the second installation cavity and the center line of the first buckling surface is 0.05-0.1 mm.

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