Speed reducing mechanism of food processor and food processor

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a speed reducing mechanism of a food processor and the food processor. The speed reduction mechanism comprises a motor and a speed reduction box in transmission connection with the output end of the motor, the speed reduction box comprises a first-stage speed reduction assembly and a second-stage speed reduction assembly, and a first output frame of the first-stage speed reduction assembly comprises a first body for fixing a first planet wheel, a first annular extending part and a second annular extending part which extend from the bottom of the first body to a second planet wheel. The first extension part is located on the outer side of the second extension part and is in transmission meshing with the second planet gears, the outer diameter of the first extension part is not smaller than the rotating outer diameter formed by rotation of the centers of the first planet gears, the second extension part fixes the first output head, and the first extension part and the second extension part are arranged at intervals in the radial direction to form a separation groove between the first extension part and the second extension part; the problem that after a first output frame serves as a second sun gear and is thickened, transmission clamping stagnation between a second planet gear and a first planet carrier affects the food material smashing uniformity is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to kitchen appliance technical field, concretely relates to a food processor's speed reducer and food processor. BACKGROUND

[0002] Traditional two-stage speed reducer is widely used in dough kneader and meat grinder, such as patent number 202111147958.X, it can be known that: food processor usually includes host computer, cup body, cup cover is arranged on the cup cover, replaceable meat grinder and dough kneader, the host computer is provided with motor and speed reducer driven by motor. The speed reducer includes a first speed reduction assembly and a second speed reduction assembly, the first speed reduction assembly and the second speed reduction assembly drive the meat grinder and the dough kneader respectively. The first speed reduction assembly includes a first sun gear composed of the output end of the motor, a first planetary gear in transmission engagement with the first sun gear, a first planetary carrier connected in a body with the first planetary gear and the sun gear, a first drive shaft is arranged on the first output frame, a first output head is connected in a body at the bottom of the first drive shaft, the first output head and the knife shaft of the meat grinder are inserted and matched to realize high-speed transmission; the second speed reduction assembly includes a second sun gear, the second sun gear is formed by the first drive shaft, and further includes a plurality of second planetary gears in transmission engagement with the outer side of the second sun gear, a second planetary carrier connected in a body with the second sun gear and the second planetary gears, the second planetary carrier includes a second output head with a through hole, the first output head is inserted into the through hole of the second output head, and the dough kneader is inserted and matched with the second output head to realize low-speed transmission.

[0003] Generally speaking, the required rotation speed of meat grinding is about 3000r / min; the required rotation speed of dough kneading is only 300-500r / min, to adapt to different processing requirements. Specifically, the speed reduction ratio of the first speed reduction assembly is about 8, and the speed reduction ratio of the second speed reduction assembly is about 7, and the difference between the two speed reduction ratios is not large, so that the rotation speed of the first output head and the rotation speed of the second output head are relatively different. Therefore, for the second speed reduction assembly, the outer diameter of the second sun gear is smaller than the outer diameter of the second planetary gear.

[0004] However, when the applicant applies the two-stage speed reduction box to a common meat grinder, the meat grinder knife adopts a split knife, that is, the meat grinder knife includes a knife shaft and a knife sleeve sleeved on the knife shaft, and the knife shaft and the knife sleeve are both provided with knife leaves, and it is expected that the second output head drives the knife sleeve to rotate, and the first output head drives the knife shaft to rotate, so as to realize that one meat grinder knife has different rotating speeds when working, and the crushing uniformity is improved, it is found that the food materials located on the upper part of the cup body cannot be stirred and crushed by the knife leaves on the knife sleeve, but the problem of uneven particles is aggravated. However, when the applicant thinks that the outer diameter of the second sun gear of the two-stage speed reduction assembly is increased, the outer diameter of the second planetary gear is reduced to reduce the speed reduction ratio of the two-stage speed reduction assembly, that is, the rotating speed of the knife sleeve and the rotating speed of the knife shaft have a rotating speed difference, but the rotating speed difference is not large, and the crushing uniformity is obviously improved. However, the first driving shaft of the two-stage speed reduction box in the foregoing is a metal shaft, and if the outer diameter of the metal shaft is expanded, the cost will be greatly increased. Therefore, the applicant considers that the first planetary carrier is directly used as the second sun gear on the basis of removing the metal shaft, the first output shaft is fixed to the first planetary carrier, and the first planetary carrier with an expanded outer diameter is used to solve the cost problem. However, when there is a size deviation or less lubricating oil between the second planetary gear and the first planetary carrier, the transmission between the second planetary gear and the first planetary carrier is stuck, and the overall food material crushing effect is affected. Practical new type content

[0005] The utility model provides a kind of speed reduction mechanism and food processing machine of food processing machine, to solve the problem that the first output frame of speed reduction mechanism is as second sun gear and is thickened after being set, leading to transmission jam between second planetary gear and first planetary carrier affecting food material crushing uniformity.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a food processing machine's speed reducer, including motor, with the output end transmission connection of motor's reduction gearbox, the reduction gearbox includes the box body with the accommodating cavity, install in the accommodating cavity's first reduction assembly and second reduction assembly, the first reduction assembly includes a plurality of first planetary wheel and is located first planetary wheel bottom and rotates with first planetary wheel synchronous first output frame, the bottom of first output frame is fixed with first output head, the second reduction assembly includes a plurality of second planetary wheel and is located second planetary wheel bottom and rotates with second planetary wheel synchronous second output frame, the second output frame includes the second output head with through -hole, first output head is inserted in the through -hole of second output head, the first output frame includes the first body of fixed first planetary wheel, the first extension and second extension of the annular of the first body bottom towards second planetary wheel extension, the first extension is located second extension outside, and with second planetary wheel transmission engages, the outer diameter of first extension is not less than the rotation outer diameter formed by a plurality of first planetary wheel's center rotation, the second extension fixed first output head, the first extension and second extension are along the radial interval arrangement to form the separation groove between both.

[0008] The utility model discloses a food processing machine's speed reducer, including motor, with the output end transmission connection of motor's reduction gearbox, the reduction gearbox includes the box body with the accommodating cavity, install in the accommodating cavity's first reduction assembly and second reduction assembly, the first reduction assembly includes a plurality of first planetary wheel and is located first planetary wheel bottom and rotates with first planetary wheel synchronous first output frame, the bottom of first output frame is fixed with first output head, the second reduction assembly includes a plurality of second planetary wheel and is located second planetary wheel bottom and rotates with second planetary wheel synchronous second output frame, the second output frame includes the second output head with through -hole, first output head is inserted in the through -hole of second output head, the first output frame includes the first body of fixed first planetary wheel, the first body bottom towards second planetary wheel extension and the annular of the first extension and second extension, the first extension is located second extension outside, and with second planetary wheel transmission engages, the outer diameter of first extension is not less than the rotation outer diameter formed by a plurality of first planetary wheel's center rotation, the second extension fixed first output head, the first extension and second extension are along the radial interval arrangement to form the separation groove between both.

[0009] On this basis, the first extension part is slightly deformed relative to the separation groove to avoid jamming defects, promote smooth transmission between the second planetary gear and the first extension part, maintain the stability of operation, and thus ensure the uniform consistency of the crushing effect. And in the process of overcoming the jamming, since the first extension part and the second extension part are spaced apart by the avoidance groove, the deformation and shaking of the first extension part will not be directly transmitted to the second extension part, so that the second extension part is more reliable and stable in fixing the first output head, and the cantilever end of the first output head is reduced. On the other hand, since the first extension part only acts on the second planetary gear, and the second extension part only acts on the first output head, they do not interfere with each other, and the stress of the entire first output frame is decomposed, the connection between the first extension part and the second extension part and the first body is less likely to break, solving the problem in the prior art that forces in different directions act on the same side wall of the first output frame, and the connection between the side wall of the first output frame and the first body is prone to cracking, affecting the stability of the secondary reduction gearbox and the first output head transmission.

[0010] Preferably, the second output frame includes a second body for fixing the second planetary gear, the second output head is located at the bottom of the second body, the first extension part is located above the second body, and the second extension part extends into the through hole of the second output head.

[0011] In the present scheme, the first extension part is located above the second body, so that the first extension part only acts on the second planetary gear, maintaining the transmission stability of the second planetary gear and the first extension part. If the first extension part extends into the second output head, on the one hand, the holding area of the second body for the second planetary gear is reduced, affecting the holding balance of the second planetary gear; on the other hand, not only does it increase the manufacturing cost, but also the size of the first extension part and the second output head needs to be accurately set to ensure that the outside of the first extension part does not contact and rub with the second output head, and the structure is more complex. Based on the fact that the first extension part is located above the second body, it is impossible to shield the lubricating oil between the second planetary gear and the first extension part, so the second extension part is set to extend into the second output head, which at least shields the lateral connection seam between the first extension part and the second body, avoiding direct radial flow into the first output head to pollute the first output head. In addition, the lengthening of the second extension part helps to increase the length of the connection part between the second extension part and the first output head, and better maintain the fixing stability of the two.

[0012] Preferably, the inner side of the second output head is further provided with an inner extension rib extending towards the second extension part, and the inner extension rib and the inner side wall of the second output head enclose an oil storage groove with an opening facing the partition groove.

[0013] In the scheme, the inner extension rib forms the oil storage groove with an opening facing the partition groove, so that when the lubricating oil flows down from the second main body into the side wall of the second output head, the lubricating oil can be stored in the oil storage groove, avoiding the lubricating oil flowing out of the second output head to contaminate the stirring knife connected with the second output head, and the lubricating oil may even flow into the stirring cup to affect the health and safety of the food materials.

[0014] Preferably, the inner side of the second output head is further provided with an inner extension rib extending towards the second extension part, and the inner extension rib and the inner side wall of the second output head enclose an oil storage groove with an opening facing the partition groove.

[0015] In the embodiment, the inner extension rib is arranged around the outer periphery of the first output head and gap-fitted with the first output head, so as to locally reduce the distance between the second output head and the first output head, and avoid large deflection of the second output head. In normal operation, the inner extension rib and the first output head are gap-fitted and do not interfere with each other; when the second output head produces a slight deflection to contact the first output head, the first output head can right the second output head.

[0016] Preferably, the first output head is arranged inside the second output head, the inner side of the second output head is provided with a guide part, the bottom wall of the guide part extends obliquely towards the first output head, the bottom wall of the first output head extends obliquely axially inward to form a first guide surface, and the inclination angle of the bottom wall of the guide part is greater than the inclination angle of the first guide surface; or,

[0017] The inner side of the second output head is provided with a plurality of engagement teeth, the guide end of the engagement tooth is provided with two guide inclined surfaces extending obliquely in opposite directions, and the intersection of the two guide inclined surfaces is provided outwardly; or,

[0018] The guide end of the first output head includes a first guide surface extending obliquely axially inward, the inner side of the first output head is provided with a plurality of engagement teeth, and a second guide surface is further arranged between the engagement teeth and the first guide surface; or,

[0019] The guide end of the first output head includes a first guide surface extending obliquely axially inward, the first guide surface is provided with a guide protrusion with an arc surface, and the guide protrusion gradually reduces in width and thins in thickness along the radial direction inwardly.

[0020] In the application, the first output head is arranged inside the second output head to form a stepped double output shaft hole, so that the shaft of the stirring blade matched with the first output head and the shaft of the stirring blade matched with the second output head can be formed as a male connector, facilitating the cleaning of the stirring blade. On this basis, since the first output head is deeper than the second output head, the shaft of the stirring blade matched with the first output head is prone to position deviation in the output hole of the second output head, which makes it difficult to be introduced into the first output head. Therefore, in the application, the bottom wall of the guide portion is arranged to extend obliquely towards the first output head, so that when the connector of the stirring blade is deviated, the connector of the stirring blade is guided by the bottom wall of the guide portion to be centered towards the first output head. Further, the bottom wall of the first output head is arranged to extend obliquely inward to form a first introduction surface, facilitating the sliding of the connector of the stirring blade into the first output head. At the same time, in order to avoid the guide portion exerting too much guiding force on the connector of the stirring blade, which makes the connector of the stirring blade move to the opposite side of the second output head, i.e. the connector of the stirring blade is difficult to be centered with the first output head or to be located in the area that can be guided by the bottom wall of the first output head. Therefore, the inclination angle of the bottom wall of the guide portion is greater than the inclination angle of the first introduction surface, so that the connector guided by the guide portion can be smoothly caught by the bottom wall of the first output head to enter the introduction range of the first output head.

[0021] In another preferred scheme, in order to facilitate the insertion of the connector of the stirring blade into the second output head, two guide inclined surfaces extending in opposite directions are arranged at the introduction end of the engaging teeth of the second output head, and the intersection of the two guide inclined surfaces is convexly arranged towards the outside. In this way, when the connector of the stirring blade touches the bottom wall of the engaging teeth, the connector can be smoothly slid into the second output head through the two guide inclined surfaces to match the output shaft hole of the second output head, thereby improving the convenience of the installation and introduction of the stirring blade into the second output head.

[0022] The existing first output head is often only provided with a first introduction surface extending obliquely inward at the introduction end, and the first introduction surface directly intersects with the engaging teeth inside the first output head, which causes a sudden collision noise when the connector of the stirring blade slides into the engaging teeth through the first introduction surface. Therefore, in the present scheme, a second introduction surface with a greater inclination angle than the first introduction surface is arranged between the first introduction surface and the engaging teeth, so that after the connector of the stirring blade enters the introduction range of the first output head through the first introduction surface, the second introduction surface serves as a guide bridge between the first introduction surface and the vertical direction of the engaging teeth. The second introduction surface is closer to the vertical introduction direction, so that the change of the direction of the connector of the stirring blade is gradually guided to the vertical introduction, and the sudden collision noise caused by the large-angle change is avoided. At the same time, the connector of the stirring blade can also be prevented from being worn by the sharp corner of the intersection of the engaging teeth of the first introduction surface.

[0023] In another embodiment for improving the introduction effect, a guiding protrusion in the form of an arc surface is arranged on the first introduction surface, and the guiding protrusion is used to push the connecting head of the stirring knife to rotate circumferentially to be aligned with the first output head when the connecting head of the stirring knife abuts against the guiding protrusion. The guiding protrusion is also arranged to gradually decrease in width and thickness in the radial direction, wherein the gradual decrease in width makes the connecting head of the stirring knife more easily move towards the side deviated from the guiding protrusion as the connecting head moves towards the center of the first output head, so as to align the connecting head with the first output head; and the gradual decrease in thickness is to guide the connecting head to be aligned with the first output head, and the better the alignment effect during the guiding, the more easily the connecting head rotates axially to move to be aligned with the first output head when the connecting head abuts against the guiding protrusion.

[0024] Preferably, the partition groove is further provided with a plurality of partition ribs arranged at intervals in the axial direction, one end of each partition rib being connected to the first extension part and the other end being connected to the second extension part, and a partition groove being formed between adjacent partition ribs.

[0025] In the present application, it is considered that, after the first output head is combined with the stirring knife, a large torque is generated when some hard food materials such as traditional Chinese medicine and nuts are crushed, so that the first output head drives the second extension part to swing and shake, but it is also considered that the first extension part needs to balance the transmission when it encounters a jam to efficiently solve the jam problem by means of a small deformation to make the transmission smooth. Therefore, the present application is arranged to set partition ribs at intervals in the partition groove between the first extension part and the second extension part, a partition groove being formed between adjacent partition ribs, and a plurality of partition grooves can meet the requirement of small deformation of the first extension part to ensure smooth transmission, and the partition ribs are connected between the first extension part and the second extension part to form a plurality of supports for the second extension part at the partition ribs, which obviously improves the righting effect of the first output head compared with the scheme in which the first extension part and the second extension part are connected by a whole annular partition groove.

[0026] Preferably, the inner side of the second extension part is provided with a plurality of positioning grooves, and the outer side of the first output head is provided with a plurality of positioning protrusions matched with the positioning grooves, and the second extension part and the first output head are circumferentially rotationally stopped by the cooperation of the positioning grooves and the positioning protrusions; or,

[0027] The first output head is provided with a partition plate inside to form a first output shaft hole below the partition plate and a limiting groove above the partition plate, the top of the through hole of the second output head is in communication with the limiting groove, and the top of the through hole of the second output head is large downward and small upward.

[0028] In the present application, the second extension part and the first output head are two independent components, which are preferably fixedly connected by overmolding. Therefore, in order to improve the circumferential stop effect of the second extension part on the first output head, a plurality of positioning protrusions matched with the positioning grooves are arranged on the outer side of the first output head.

[0029] In another embodiment, in order to realize that, in the overmolding process, the first output head is positioned first, and the positioning column of the mold is separated from the first output frame and the first output head at the same time after the injection molding is completed, a positioning groove is arranged at the top of the first output head, and the through hole of the second output head is communicated with the positioning groove at the top. In addition, the top of the through hole of the second output head is large at the top and small at the bottom, which has a demolding guide and is more conducive to the mold to be separated. The existence of the partition plate separates the output hole of the first output head and the primary speed reduction mechanism in the up-down direction, avoiding the lubricating oil in the speed reduction mechanism flowing into the output hole of the first output head. The positioning groove is communicated with the through hole of the second output head, forming a larger groove, which can be used to store oil for the primary speed reduction assembly, or when the output shaft of the motor has length difference, the positioning groove can be used to avoid the output shaft, and the size adaptation is greater.

[0030] Preferably, the inner side wall of the box body has an inner ring gear, the inner diameter of the inner ring gear is consistent along the axial direction of the box body, and the first planetary gear and the second planetary gear are simultaneously in transmission engagement with the inner ring gear.

[0031] In the present application, by arranging the inner ring gear with consistent inner diameter along the axial direction of the box body, the first planetary gear and the second planetary gear can be assembled into the box body in the same installation direction, and the radial positioning of the inner ring gear to the first planetary gear and the radial positioning of the inner ring gear to the second planetary gear are uniquely determined, which is more conducive to ensuring the centration of the output head after the assembly of the first speed reduction assembly and the second speed reduction assembly is completed. More importantly, compared with the split inner ring gear solution, the present application has a simpler process of adapting two sets of planetary gears with one inner ring gear, and compared with the existing technology, the radial size of the box body is effectively reduced, which is conducive to the miniaturization design of the main machine.

[0032] The present application also provides a food processor comprising the speed reduction mechanism described above;

[0033] Preferably, the food processor further comprises a knife shaft in transmission engagement with the first output head and a knife sleeve sleeved outside the knife shaft, the top of the knife sleeve is in transmission engagement with the second output head, wherein the bottom of the knife shaft is provided with a first blade, the outer part of the knife sleeve is provided with a second blade, the second blade is higher than the first blade, and the knife sleeve rotates synchronously with the knife shaft, and the rotational speed of the knife sleeve is lower than that of the knife shaft.

[0034] In the scheme, the first output head and the second output head are synchronously rotated to drive the cutter sleeve and the cutter shaft to rotate at different speeds, so that the first blade on the cutter shaft rotates at a relatively high speed, and the second blade on the cutter sleeve rotates at a relatively low speed, thereby playing the effect of crushing food materials. Specifically, when the bottom food materials are crushed by the first blade and pushed to the side wall of the stirring cup and continuously push the upper uncrushed food materials to the stirring range of the second blade, the second blade not only pre-chops the uncrushed food materials into large pieces, but more importantly, plays the role of pressing the large food materials into the crushing space of the first blade, and scraping the food materials adhering to the outside of the second blade into the crushing space of the first blade to participate in crushing, thereby improving the crushing uniformity.

[0035] Preferably, the stirring cup, the cup cover arranged on the stirring cup, the main machine arranged on the cup cover, the speed reducer arranged in the main machine, the mounting groove arranged on the cup cover for inserting the main machine, the convex rib arranged on the bottom wall of the mounting groove, the insertion slot arranged on the bottom wall of the main machine for inserting the convex rib, the pre-engagement distance between the cutter sleeve and the second output head being 0.5mm to 5mm when the insertion slot and the convex rib are misaligned, and the pre-engagement distance between the cutter shaft and the first output head being 0.5mm to 5mm when the insertion slot and the convex rib are misaligned; when the insertion slot and the convex rib are in place, the cutter sleeve and the second output head are engaged in place, the cutter shaft and the first output head are engaged in place, and the main machine in the on state can be triggered and started by the main machine key.

[0036] When the bottom wall insertion slot of the main machine and the convex rib of the cup cover are misaligned, the cutter sleeve and the second output head have a pre-engagement distance, and the cutter shaft and the first output head have a pre-engagement distance, so that when the main machine is misaligned relative to the cup cover, the cutter sleeve and the cutter shaft are pre-engaged with the corresponding output heads, and the misalignment is avoided. When the main machine is rotated by a certain angle along the axial direction relative to the cup cover until the insertion slot and the convex rib are aligned, the main machine is further sunk, the first output head and the second output head are respectively slid towards the cutter sleeve and the cutter shaft, the cutter sleeve and the second output head are engaged in place, the cutter shaft and the first output head are engaged in place, the double pieces (i.e. the cutter shaft and the cutter sleeve) are self-guided, and the problem that one piece is engaged in place and the other piece is not engaged in place, resulting in failure to start or poor crushing effect, is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0037] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0038] Figure 1 It is a structural schematic diagram of the speed reduction mechanism in an embodiment of the present application.

[0039] Figure 2 For Figure 1 Local enlarged view of A area in the middle;

[0040] Figure 3 For the explosion diagram of the speed reducer in an embodiment of the utility model;

[0041] Figure 4 For the structural schematic diagram of the first output frame from top to bottom in an embodiment of the utility model;

[0042] Figure 5 For the structural schematic diagram of the first output frame from bottom to top in an embodiment of the utility model;

[0043] Figure 6 For the structural schematic diagram of the second output frame from bottom to top in an embodiment of the utility model;

[0044] Figure 7 For the structural schematic diagram of the second output frame from top to bottom in an embodiment of the utility model;

[0045] Figure 8 For the structural schematic diagram of the main machine in an embodiment of the utility model;

[0046] Figure 9 For the structural schematic diagram of the first output head in one perspective in an embodiment of the utility model;

[0047] Figure 10 For the structural schematic diagram of the first output head in another perspective in an embodiment of the utility model;

[0048] Figure 11 For the structural schematic diagram of the stirring knife in an embodiment of the utility model;

[0049] Figure 12 For the sectional view of the whole machine in an embodiment of the utility model.

[0050] Component and figure mark list:

[0051] 1-main machine, 11-speed reducer, 111-motor, 112-speed reducer box, 113-slot;

[0052] 2-first speed reduction assembly, 21-first planetary gear, 22-first sun gear, 23-first output frame, 231-first extension, 232-second extension, 2321-positioning groove, 233-separation groove, 234-first output head, 2341-first guide-in surface, 2342-second guide-in surface, 2343-guide protrusion, 2344-positioning protrusion, 2345-separation plate, 2346-first output shaft hole, 2347-limiting groove, 235-first body, 236-separation rib;

[0053] 3 - second reduction assembly, 31 - second planetary gear, 32 - second output frame, 321 - second output head, 3211 - inner extension rib, 3212 - oil storage groove, 3213 - guide part, 3214 - meshing tooth, 3215 - guide slope; 322 - second body;

[0054] 4 - box, 41 - inner ring gear, 42 - box cover;

[0055] 5 - cup cover, 51 - mounting groove, 511 - convex rib;

[0056] 6 - stirring knife, 61 - knife sleeve, 611 - second blade, 62 - knife shaft, 621 - first blade;

[0057] 7 - stirring cup. DETAILED DESCRIPTION

[0058] In order to more clearly illustrate the overall concept of the utility model, the following will be described in detail with reference to the accompanying drawings.

[0059] As Figures 1 to 3 shown, the reduction mechanism 11 described in the embodiment of the application comprises a motor 111, a reduction box 112 in driving connection with the output end of the motor 111, the reduction box 112 comprising a box 4 with a receiving cavity, a primary reduction assembly and a secondary reduction assembly installed in the receiving cavity, preferably, the box 4 is provided with an open upper end, and when the primary reduction assembly and the secondary reduction assembly are installed in the box 4, a box cover 42 is further provided at the opening of the box 4. The primary reduction assembly comprises a plurality of first planetary gears 21, a first sun gear 22 installed in the middle of the plurality of first planetary gears 21 and in meshing transmission with the first planetary gears 21, and a first output frame 23 installed at the bottom of the first planetary gears 21 and rotating synchronously with the first planetary gears 21. Among them, the output shaft of the motor 111 is provided with meshing teeth, that is, the output shaft of the motor as the first sun gear 22, the bottom of the first output frame 23 is fixed with a first output head 234, and the first output head 234 is internally hollow and provided with internal meshing teeth. The secondary reduction assembly comprises a plurality of second planetary gears 31, a second sun gear installed in the middle of the plurality of second planetary gears 31 and in meshing transmission with the second planetary gears 31, and a second output frame 32 installed at the bottom of the second planetary gears 31 and rotating synchronously with the second planetary gears 31, the second output frame 32 comprises a second output head 321 provided with a through hole, and the first output head 234 is inserted into the through hole of the second output head 321. The utility model is provided with a primary reduction assembly and a secondary reduction box 112, the primary reduction assembly is provided with a first output head 234, the secondary reduction assembly is provided with a second output head 321, so that the first output head 234 and the second output head 321 have different rotating speeds.

[0060] Preferably, with reference to Figure 1 , Figure 3 , Figure 12 , the inner side wall of the box body 4 is provided with an inner ring gear 41, the inner diameter of the inner ring gear 41 is consistent along the axial direction of the box body 4, and the first planetary gear 21 and the second planetary gear 31 are simultaneously in driving engagement with the inner ring gear 41. By setting the inner diameter of the inner ring gear 41 to be consistent along the axial direction of the box body 4, the first planetary gear 21 and the second planetary gear 31 can be assembled into the box body 4 in the same mounting direction, and the radial positioning of the inner ring gear 41 to the first planetary gear 21 and the radial positioning of the inner ring gear 41 to the second planetary gear 31 are uniquely determined, which is more conducive to ensuring the centering of the output head after the first reduction assembly 2 and the second reduction assembly 3 are assembled. More importantly, compared with the split inner ring gear 41 solution, the two sets of planetary gears are adapted by one inner ring gear 41 in the present application, which is a simpler process. Compared with the existing technology, the radial size of the box body 4 is effectively reduced, which is conducive to the miniaturization design of the main machine 1.

[0061] Specifically, with reference to Figure 1 , Figure 4 and Figure 5 , the first output frame 23 includes a first body 235 for fixing the first planetary gear 21, a first extension part 231 and a second extension part 232 extending from the bottom of the first body 235 and in the shape of a ring, the first extension part 231 is located outside the second extension part 232 and is in driving engagement with the second planetary gear 31, that is, the first extension part 231 serves as a second sun gear. With reference to Figure 1 and Figure 4 , the outer diameter of the first extension part 231 is not less than the rotation outer diameter formed by the central rotation of the plurality of first planetary gears 21, the second extension part 232 fixes the first output head 234, and the first extension part 231 and the second extension part 232 are arranged radially apart to form a separation groove 233 therebetween. By setting the outer diameter (D1 in Figure 1 ) of the first extension part 231 as a second sun gear to be not less than the rotation outer diameter (D2 in Figure 4 ) formed by the central rotation of the plurality of first planetary gears 21, that is, the outer diameter of the first extension part 231 is enlarged (equivalent to the outer diameter of the second sun gear is enlarged), so that under the premise that the structure of the box body 4 is not changed, the outer diameter of the second planetary gear 31 is reduced compared with the prior art, the reduction ratio of the two-stage reduction assembly is significantly reduced, and the rotational speed difference between the first output head 234 and the second output head 321 is smaller. Preferably, the reduction ratio of the first-stage reduction assembly is between 5 and 11, and the reduction ratio of the second-stage reduction assembly is between 1 and 5.

[0062] On this basis, the first extension part 231 and the second extension part 232 are arranged to be annular, and a separation groove 233 is arranged between the first extension part 231 and the second extension part 232, so as to thin the continuous wall thickness of the first output frame 23. When the second planetary gear 31 has a small positional deviation relative to the first extension part 231, or the lubricating oil is insufficient to cause the secondary transmission to be stuck, the cantilever end of the first extension part 231 can be slightly deformed relative to the separation groove 233 to avoid, so as to overcome the sticking defect, promote the smooth transmission between the second planetary gear 31 and the first extension part 231, maintain the stability of the operation, and further ensure the uniform consistency of the crushing effect. Moreover, in the process of overcoming the sticking, since the first extension part 231 and the second extension part 232 are arranged to be spaced apart by the avoidance groove, the deformation and shaking of the first extension part 231 will not be directly transmitted to the second extension part 232, so that the fixation of the second extension part 232 to the first output head 234 is more reliable and stable, and the cantilever end of the first output head 234 is reduced. On the other hand, since the first extension part 231 only acts on the second planetary gear 31, and the second extension part 232 only acts on the first output head 234, the two do not interfere with each other, the stress of the entire first output frame 23 is decomposed, the connection between the first extension part 231 and the second extension part 232 and the first body 235 is less likely to break, and the problem in the prior art that forces in different directions act on the same side wall of the first output frame 23, and cracks are prone to occur at the connection between the side wall of the first output frame 23 and the first body 235, affecting the stability of the secondary reduction gearbox 112 and the first output head 234 transmission.

[0063] Specifically, referring to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 , the second output frame 32 includes a second body 322 for fixing the second planetary gear 31, the first extension part 231 is located above the second body 322, and the second extension part 232 extends into the through hole of the second output head 321.

[0064] In the present scheme, the first extension part 231 is arranged above the second body 322, so that the first extension part 231 only acts outwardly on the second planetary gear 31, maintaining the transmission stability of the second planetary gear 31 and the first extension part 231, avoiding the case that the first extension part 231 extends into the second output head 321, on the one hand, the holding area of the second body 322 to the second planetary gear 31 is reduced, affecting the holding balance of the second planetary gear 31; on the other hand, not only the manufacturing cost is increased, but also the size of the first extension part 231 and the second output head 321 needs to be accurately set to ensure that the outer side of the first extension part 231 does not contact and rub with the second output head 321, and the structure is more complex.

[0065] Based on the first extension 231 located above the second body 322, it is impossible to achieve the shielding of the lubricating oil between the second planetary gear 31 and the first extension 231, and thus the second extension 232 is arranged to extend into the second output head 321, which can at least laterally shield the connecting joint between the first extension 231 and the second body 322, avoiding the lubricating oil flowing directly radially inward into the first output head 234 to contaminate the first output head 234. In addition, the lengthening of the second extension 232 is beneficial to increase the length of the connecting part between the second extension 232 and the first output head 234, and better maintain the fixing stability of the two.

[0066] Further, in a preferred embodiment, referring to Figure 1 、 Figure 2 , the inner side of the second output head 321 is further provided with an inner extension rib 3211 extending towards the second extension 232, and the inner extension rib 3211 and the inner side wall of the second output head 321 form an oil storage groove 3212 opening towards the partition groove 233. In this scheme, the oil storage groove 3212 opening towards the partition groove 233 is formed by arranging the inner extension rib 3211, so that when the lubricating oil flows down from the second main body into the side wall of the second output head 321, the lubricating oil can be stored in the oil storage groove 3212, avoiding the lubricating oil flowing out of the second output head 321 to contaminate the stirring knife 6 connected with the second output head 321, and the lubricating oil may even flow into the stirring cup 7, affecting the health and safety of the food materials.

[0067] In order to more clearly set forth the technical solutions of the present application, and facilitate understanding, the specific embodiments are described in the form of a complete machine. Among them, the food processor provided by the present application takes a meat grinder as an example for explanation, which includes the speed reduction mechanism 11 described above. Specifically, referring to Figure 8 、 Figure 12 , the meat grinder includes a stirring cup 7, a cup cover 5 covering the stirring cup 7, a main machine 1 installed on the cup cover 5, and the speed reduction mechanism 11 fixed in the main machine 1. Among them, the stirring cup 7 is provided with a stirring knife 6 driven by the output head of the speed reduction mechanism 11, the cup cover 5 is provided with a mounting groove 51 for inserting the main machine 1, and the bottom wall of the mounting groove 51 is provided with a protruding rib 511, and the bottom wall of the main machine 1 is provided with an insertion slot 113 matched with the protruding rib 511. In the prior art, a micro-motion connecting rod (not shown in the figure, but shown) is arranged at the insertion slot 113, and a micro-motion switch is arranged above the micro-motion connecting rod in the main machine 1. When the main machine 1 is installed to a position relative to the cup cover 5, the protruding rib 511 on the cup cover 5 is installed in position with the insertion slot 113, driving the micro-motion connecting rod to move upward and closing the micro-motion switch, so that the main machine 1 is in a state of circuit conduction. In this way, under the action of the button of the main machine 1, the speed reduction mechanism 11 in the main machine 1 can be started, and the stirring knife 6 is driven to rotate and crush the food materials.

[0068] It should be noted that the food processor of the present application can also be applied to the model with the main machine 1 placed below, that is, the stirring cup 7 is arranged above the main machine 1, and the cup cover 5 is arranged at the opening of the stirring cup 7. Of course, it can also be applied to the food processor without hand washing, which will not be described here.

[0069] For the stirring knife 6, in a preferred embodiment, the stirring knife 6 is provided with two knives, for example, including a replaceable meat grinder and a dough mixer, the connecting head of the meat grinder is connected with the high-speed first output head 234 to realize high-speed crushing, and the connecting head of the dough mixer is connected with the low-speed second output head 321 to realize relatively low-speed mixing.

[0070] More preferably, referring to Figure 11 and Figure 12 The stirring knife 6 is made into a split knife, including a knife shaft 62 in transmission engagement with the first output head 234 and a knife sleeve 61 sleeved outside the knife shaft 62, the top of the knife sleeve 61 is in transmission engagement with the second output head 321, wherein the bottom of the knife shaft 62 is provided with a first blade 621, the outside of the knife sleeve 61 is provided with a second blade 611, the second blade 611 is higher than the first blade 621, and the knife sleeve 61 rotates synchronously with the knife shaft 62, and the rotating speed of the knife sleeve 61 is lower than that of the knife shaft 62. The first output head 234 and the second output head 321 are driven simultaneously to rotate the knife sleeve 61 and the knife shaft 62 at different speeds, so that the first blade 621 on the knife shaft 62 rotates at a relatively high speed, which plays a role in crushing food materials, and the second blade 611 on the knife sleeve 61 rotates at a relatively low speed, which plays a role in pressing food materials and scraping food materials on the side wall of the stirring cup 7. When the bottom food materials are crushed by the first blade 621 and pushed to the side wall of the stirring cup 7 and continuously push the upper uncrushed food materials to the stirring range of the second blade 611, the second blade 611 not only cuts the uncrushed food materials into large pieces, but more importantly, it presses the large food materials into the crushing space of the first blade 621 and scrapes the food materials on the outside of the second blade 611 into the crushing space of the first blade 621 to participate in crushing, realizing that the speed reduction mechanism 11 drives the knife sleeve 61 and the knife shaft 62 to rotate at different speeds (equivalent to double driving), and improving the crushing uniformity.

[0071] When the stirring knife 6 adopts a split knife, it is necessary to ensure that the connecting heads of the knife sleeve 61 and the knife shaft 62 are simultaneously inserted into the first output head 234 and the second output head 321. Compared with the installation mode of the meat grinder only needing to be inserted into the first output head 234 and the dough mixer only needing to be inserted into the second output head 321, the installation mode is more difficult.

[0072] We can understand that, in general, when the consumer installs the host 1 on the cup cover 5, it is often difficult to align the slot 113 of the host 1 with the convex rib 511 of the cup cover 5 at one time, and the host 1 needs to be rotated to align the slot 113 with the convex rib 511. However, the applicant found that the original improved scheme had the phenomenon that after rotating the host 1, the slot 113 and the convex rib 511 were difficult to align. The root cause is that the original scheme of the stirring knife 6, the connecting head of the knife sleeve 61 or the connecting head of the knife shaft 62 is easy to be offset with the corresponding output head, which can lift the corresponding output head, so that no matter how the host 1 is rotated, it is difficult to make the convex rib 511 of the cup cover 5 inserted into the slot 113 of the host 1, and then make the knife sleeve 61 and the knife shaft 62 are smoothly inserted into the corresponding output head.

[0073] Therefore, the applicant sets the bottom wall of the host 1 with the slot 113 matched with the convex rib 511, when the slot 113 and the convex rib 511 are misaligned, the pre-engaging distance between the knife sleeve 61 and the second output head 321 is between 0.5 to 5mm, and the pre-engaging distance between the knife shaft 62 and the first output head 234 is between 0.5 to 5mm, so that when the bottom wall slot 113 of the host 1 and the convex rib 511 of the cup cover 5 installation slot 51 are misaligned, the knife sleeve 61 and the second output head 321 have a pre-engaging distance, and the knife shaft 62 and the first output head 234 have a pre-engaging distance, so that when the host 1 is misaligned relative to the cup cover 5, the knife sleeve 61 and the knife shaft 62 are pre-engaged with the corresponding output head to avoid offset; in this way, when the host 1 is rotated relative to the cup cover 5 along the axial direction to align the slot 113 with the convex rib 511, the host 1 is further sunk, so that the first output head 234 and the second output head 321 slide towards the knife sleeve 61 and the knife shaft 62 respectively, so that the knife sleeve 61 and the second output head 321 are engaged in place, and the knife shaft 62 and the first output head 234 are engaged in place, realizing the self-guiding of the two pieces (i.e. the knife shaft 62 and the knife sleeve 61), at this time the host 1 is in the on state and can be triggered to start by the host 1 button. This scheme effectively avoids the situation that the knife sleeve 61 and the knife shaft 62 cannot be guided into the host 1 even after rotating the host 1, and also improves the problem that one piece is engaged in place (such as the knife shaft 62 and the first output head 234 are inserted in place), and the other piece is not engaged in place (such as the knife sleeve 61 and the second output head 321 are disengaged), which leads to failure to start or poor crushing effect.

[0074] It should be noted that when the pre-engagement distance between the knife sleeve 61 and the second output head 321 is less than 0.5mm, the knife sleeve 61 is still easy to deviate from the second output head 321 and difficult to guide into; when the pre-engagement distance between the knife sleeve 61 and the second output head 321 is greater than 5mm, the depth of the second output head 321 needs to be deeper, which results in a deeper circumferential distance between the knife shaft 62 and the first output head 234, increasing the difficulty of guiding the knife shaft 62 into the first output head 234. When the pre-engagement distance between the knife shaft 62 and the first output head 234 is less than 0.5mm, the knife shaft 62 is still easy to deviate from the first output head 234 and difficult to guide into; when the pre-engagement distance between the knife shaft 62 and the first output head 234 is greater than 5mm, the fitting depth of the first output head 234 is increased, which will further increase the difficulty of cleaning if water stains or dirt enter during cleaning, and will produce an odor over time.

[0075] Under another idea of the present application, the structure of the first output head 234 and the second output head 321 is further optimized to improve the situation that the knife sleeve 61 or the knife shaft 62 is deviated from the corresponding output head from the source. The following four preferred embodiments are given:

[0076] Embodiment 1: Referring to Figure 2 and Figure 9 , by setting the first output head 234 to be recessed inside the second output head 321, a stepped double-output shaft hole is formed, so that the knife shaft 62 of the stirring knife 6 adapted to the first output head 234 and the knife shaft 62 of the stirring knife 6 adapted to the second output head 321 can both be made into a male connector, facilitating the cleaning of the stirring knife 6.

[0077] On this basis, since the position of the first output head 234 is deeper relative to the second output head 321, the knife shaft 62 of the stirring knife 6 adapted to the first output head 234 is easy to be deviated in the output hole of the second output head 321, resulting in difficulty in guiding into the first output head 234. Therefore, when the connector of the stirring knife 6 is deviated, the connector of the stirring knife 6 is guided by the bottom wall of the guide portion 3213 to be centered towards the first output head 234, and the bottom wall of the first output head 234 is axially inclined to form a first guide surface 2341, promoting the connector of the stirring knife 6 to slide into the first output head 234. At the same time, in order to avoid the guide force of the guide portion 3213 on the connector of the stirring knife 6 being too large, so that the connector of the stirring knife 6 moves to the opposite side of the second output head 321, i.e. the connector of the stirring knife 6 is difficult to be centered with the first output head 234 or difficult to be located in the area that can be guided by the bottom wall of the first output head 234. Therefore, the inclination angle of the bottom wall of the guide portion 3213 is greater than the inclination angle of the first guide surface 2341, so that the connector guided by the guide portion 3213 is smoothly caught by the bottom wall of the first output head 234 to enter the guide range of the first output head 234.

[0078] It should be noted that the inclination angle of the bottom wall of the guide portion 3213 refers to the included angle between the guide portion 3213 and the horizontal plane, and the inclination angle of the first guide surface 2341 refers to the included angle between the first guide surface 2341 and the horizontal plane.

[0079] Embodiment 2: Reference Figure 6 The inner side of the second output head 321 is provided with a plurality of engagement teeth 3214. In order to facilitate the connection head of the stirring knife 6 to be inserted into the second output head 321, two guide inclined surfaces 3215 extending in opposite directions are arranged at the guide end of the engagement teeth 3214, and the intersection of the two guide inclined surfaces 3215 is outwardly protruding. In this way, when the connection head of the stirring knife 6 contacts the bottom wall of the engagement teeth 3214, it can be guided by the two guide inclined surfaces 3215 to smoothly slide into the second output head 321 and be matched with the output shaft hole of the second output head 321, thereby improving the convenience of installing and guiding the stirring knife 6 into the second output head 321.

[0080] Embodiment 3: Reference Figure 2 、 Figure 9 The guide end of the first output head 234 includes a first guide surface 2341 extending axially and inwardly, the inner side of the first output head 234 is provided with a plurality of engagement teeth 3214, and a second guide surface 2342 is further arranged between the engagement teeth 3214 and the first guide surface 2341, and the inclination angle of the second guide surface 2342 is greater than that of the first guide surface 2341. Wherein, the included angle of the second guide surface 2342 refers to the included angle between the second guide surface 2342 and the horizontal plane, and the inclination angle of the first guide surface 2341 refers to the included angle between the first guide surface 2341 and the horizontal plane.

[0081] The existing first output head 234 is often only provided with an axially inwardly inclined first guide-in surface 2341 at the guide-in end, and the first guide-in surface 2341 directly intersects with the meshing teeth 3214 inside the first output head 234, which causes a jarring collision noise when the connecting head of the stirring knife 6 slides through the first guide-in surface 2341 and engages with the meshing teeth 3214. Therefore, the second guide-in surface 2342 with an inclination angle greater than that of the first guide-in surface 2341 is further arranged between the first guide-in surface 2341 and the meshing teeth 3214, so that after the connecting head of the stirring knife 6 passes through the first guide-in surface 2341 and enters the guide-in range of the first output head 234, the second guide-in surface 2342 serves as a vertical guide bridge between the first guide-in surface 2341 and the meshing teeth 3214, and the second guide-in surface 2342 is closer to the vertical guide-in direction. Therefore, the process of guiding the direction change of the connecting head of the stirring knife 6 to the vertical guide-in direction is gradual, and the collision noise caused by the instantaneous large-angle change is avoided, and at the same time, the connecting head of the stirring knife 6 can also be prevented from being worn by the sharp corner of the intersection of the meshing teeth 3214 of the first guide-in surface 2341.

[0082] Embodiment 4: refer to Figure 9 By arranging the guide protrusion 2343 with a surface protruding in an arc surface on the first guide-in surface 2341, the guide protrusion 2343 is used to push the connecting head to rotate circumferentially to be aligned with the first output head 234 when the connecting head of the stirring knife 6 abuts against the guide protrusion 2343. The guide protrusion 2343 is also arranged to gradually decrease in width and gradually thin in thickness along the radial direction inwardly, wherein the gradually decreasing width makes the connecting head of the stirring knife 6 move more easily to the side away from the guide protrusion 2343 as the connecting head goes to the center of the first output head 234, so as to align the connecting head with the first output head 234; and the gradually thinning thickness is to guide the alignment of the connecting head with the first output head 234, and the better the alignment effect in the guiding process, the easier the connecting head rotates axially to move to the alignment of the connecting head with the first output head 234 when the connecting head abuts against the guide protrusion 2343.

[0083] It should be noted that the width of the guide protrusion 2343 refers to the width formed along the circumference of the first output head 234, and the thickness refers to the height of the protrusion relative to the first guide-in surface 2341. The above four embodiments can be combined arbitrarily, and preferably, the structure of the first output head 234 and the structure of the second output head 321 of the present application include all the structures of embodiments 1 to 4.

[0084] In a preferred embodiment of the present application, refer to Figure 5The separation groove 233 is further provided with a plurality of separation ribs 236 arranged at intervals along the axial direction, one end of the separation rib 236 being connected to the first extension part 231 and the other end being connected to the second extension part 232, and the adjacent separation ribs 236 forming the separation groove 233.

[0085] Generally, maintaining the first extension part 231 and the second extension part 232 to form a complete annular separation groove 233 can meet the basic crushing requirements. However, the applicant found that some consumers would use the meat grinder to crush some hard food materials such as traditional Chinese medicine and nuts, which would generate a large torque and vibration, causing the first output head 234 to drive the second extension part 232 to produce a deflection swing. However, if more reinforcement is added between the first extension part 231 and the second extension part 232, it will affect the smooth transmission of the first extension part 231 when encountering transmission jamming. Therefore, in the embodiment, the separation ribs 236 are arranged at intervals in the separation groove 233 between the first extension part 231 and the second extension part 232, and the adjacent separation ribs 236 form the separation groove 233, and a plurality of separation grooves 233 can meet the requirement of the first extension part 231 to deform slightly to ensure smooth transmission, and the separation ribs 236 are connected between the first extension part 231 and the second extension part 232, forming a plurality of supports for the second extension part 232 at the separation ribs 236. Compared with the scheme that the first extension part 231 and the second extension part 232 form a complete annular separation groove 233, the righting effect of the first output head 234 is obviously improved.

[0086] Preferably, the bottom end of the separation rib 236 can be higher than the bottom end of the first extension part 231, so that the bottom of the first extension part 231 can easily deform slightly to solve the transmission jamming of the second planetary gear 31 relative to the first extension part 231.

[0087] In a preferred embodiment of the present application, with reference to Figure 5 、 Figure 9 、 Figure 10The inner side of the second extension part 232 is provided with a plurality of positioning grooves 2321, and the outer side of the first output head 234 is provided with a plurality of positioning convex parts 2344 matched with the positioning grooves 2321, and the second extension part 232 and the first output head 234 are circumferentially stopped through the cooperation of the positioning grooves 2321 and the positioning convex parts 2344. Preferably, the second output frame 32 is made of plastic, that is, the second extension part 232 is made of plastic, and the first output head 234 is made of metal. The second extension part 232 and the first output head 234 are made into an integral part through a glue injection molding process, and the glue injection serves as a primary circumferential stop function. At this time, even if there is a slight bubble defect in the injection molding process, when the plastic is not fully covered on the outer side of the first output head 234, the positioning grooves 2321 and the positioning convex parts 2344 can be matched as a secondary circumferential stop function.

[0088] It can be understood that, in other embodiments, the glue injection molding process can not be used, but glue is arranged between the second extension part 232 and the first output head 234 at the positioning grooves 2321 and the positioning convex parts 2344, and the glue is used for reinforcement.

[0089] In a preferred embodiment of the present application, referring to Figure 1 and Figure 10 , the first output head 234 is provided with a partition plate 2345, so as to form a first output shaft hole 2346 below the partition plate 2345 and a limiting groove 2347 above the partition plate 2345, the through hole top of the second output head 321 is communicated with the limiting groove 2347, and the through hole top of the second output head 321 is large at the top and small at the bottom.

[0090] In order to realize the positioning of the first output head 234 in the glue injection molding process, and facilitate the positioning column of the mold to be separated from the first output frame 23 and the first output head 234 at the same time after the injection is completed, the positioning groove 2321 is arranged at the top of the first output head 234, and the through hole top of the second output head 321 is communicated with the positioning groove 2321. In addition, the through hole top of the second output head 321 is large at the top and small at the bottom, which is a demolding guide and is more conducive to the demolding of the mold. The existence of the partition plate 2345 separates the output hole of the first output head 234 and the primary speed reduction mechanism 11 in the up-down direction, so as to avoid and reduce the flow of lubricating oil in the speed reduction mechanism 11 to the output hole of the first output head 234. The positioning groove 2321 is communicated with the through hole top of the second output head 321, and a larger groove is formed, which can be used for oil storage of the primary speed reduction assembly, or can be used for avoiding the output shaft of the motor 111 when the length of the output shaft of the motor 111 is different, so that the size adaptation is greater.

[0091] The parts not described in the utility model can be realized by using or referring to the existing technology.

[0092] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0093] The above is only an embodiment of the present application and is not used to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A speed reduction mechanism of a food processor, comprising a motor, a speed reduction box in driving connection with an output end of the motor, the speed reduction box comprising a box body with a receiving cavity, a primary speed reduction assembly and a secondary speed reduction assembly installed in the receiving cavity, the primary speed reduction assembly comprising a plurality of first planetary gears and a first output frame provided at the bottom of the first planetary gears and rotating synchronously with the first planetary gears, the bottom of the first output frame being fixed with a first output head, the secondary speed reduction assembly comprising a plurality of second planetary gears and a second output frame provided at the bottom of the second planetary gears and rotating synchronously with the second planetary gears, the second output frame comprising a second output head with a through hole, the first output head extending into the through hole of the second output head, characterized in that, The first output frame comprises a first body fixing the first planetary gears, a first extension part extending from the bottom of the first body towards the second planetary gears in a ring shape, and a second extension part outside the first extension part and in transmission engagement with the second planetary gears, the outer diameter of the first extension part is not less than the outer diameter of the rotation formed by the center of the plurality of first planetary gears, and the first extension part and the second extension part are arranged radially apart to form a separation groove therebetween.

2. The speed reduction mechanism of a food processor according to claim 1, wherein, The second output frame comprises a second body fixing the second planetary gears, the second output head is located at the bottom of the second body, the first extension part is located above the second body, and the second extension part extends into the through hole of the second output head.

3. The speed reduction mechanism of a food processor according to claim 2, wherein, The inner side of the second output head is further provided with an inner extension rib extending towards the second extension part, and the inner extension rib and the inner side wall of the second output head form an oil storage groove with an opening facing the separation groove.

4. The speed reduction mechanism of a food processor according to claim 2, wherein, The inner side of the second output head is further provided with an inner extension rib extending towards the second extension part, and the inner extension rib is arranged around the outer periphery of the first output head and is in gap cooperation with the first output head.

5. The speed reduction mechanism of a food processor according to claim 1 or 3 or 4, wherein, The first output head is arranged inside the second output head, the inner side of the second output head is provided with a guide part, the bottom wall of the guide part extends obliquely towards the first output head, the bottom wall of the first output head extends obliquely axially inwardly to form a first guide surface, and the oblique angle of the bottom wall of the guide part is greater than the oblique angle of the first guide surface; or The inner side of the second output head is provided with a plurality of engagement teeth, the guide end of the engagement teeth is provided with two guide inclined surfaces extending obliquely in opposite directions, and the intersection of the two guide inclined surfaces is provided with a protrusion towards the outside; or The guide end of the first output head comprises a first guide surface extending obliquely axially inwardly, the inner side of the first output head is provided with a plurality of engagement teeth, and a second guide surface is further arranged between the engagement teeth and the first guide surface, and the oblique angle of the second guide surface is greater than the oblique angle of the first guide surface; or The guide end of the first output head comprises a first guide surface extending obliquely axially inwardly, and a guide protrusion with an arc surface is arranged on the first guide surface, and the width and thickness of the guide protrusion gradually decrease along the radial direction.

6. The speed reduction mechanism of a food processor according to claim 1, wherein A plurality of separation ribs are further arranged in the separation groove, one end of the separation rib is connected with the first extension part, the other end of the separation rib is connected with the second extension part, and the separation groove is formed between adjacent separation ribs.

7. The speed reduction mechanism of a food processor according to claim 1, wherein The inner side of the second extension part is provided with a plurality of positioning grooves, the outer side of the first output head is provided with a plurality of positioning protrusions matched with the positioning grooves, and the second extension part and the first output head are circumferentially stopped through the cooperation of the positioning grooves and the positioning protrusions; or The first output head is arranged inside the second output head, the inner side of the second output head is provided with a guide part, the bottom wall of the guide part extends obliquely towards the first output head, the bottom wall of the first output head extends obliquely axially inwardly to form a first guide surface, and the oblique angle of the bottom wall of the guide part is greater than the oblique angle of the first guide surface; or The inner side of the second output head is provided with a plurality of engagement teeth, the guide end of the engagement teeth is provided with two guide inclined surfaces extending obliquely in opposite directions, and the intersection of the two guide inclined surfaces is provided with a protrusion towards the outside; or The guide end of the first output head comprises a first guide surface extending obliquely axially inwardly, the inner side of the first output head is provided with a plurality of engagement teeth, and a second guide surface is further arranged between the engagement teeth and the first guide surface, and the oblique angle of the second guide surface is greater than the oblique angle of the first guide surface; or The guide end of the first output head comprises a first guide surface extending obliquely axially inwardly, and a guide protrusion with an arc surface is arranged on the first guide surface, and the width and thickness of the guide protrusion gradually decrease along the radial direction. A plurality of separation ribs are further arranged in the separation groove, one end of the separation rib is connected with the first extension part, the other end of the separation rib is connected with the second extension part, and the separation groove is formed between adjacent separation ribs. The inner side of the second extension part is provided with a plurality of positioning grooves, the outer side of the first output head is provided with a plurality of positioning protrusions matched with the positioning grooves, and the second extension part and the first output head are circumferentially stopped through the cooperation of the positioning grooves and the positioning protrusions; or The first output head is arranged inside the second output head, the inner side of the second output head is provided with a guide part, the bottom wall of the guide part extends obliquely towards the first output head, the bottom wall of the first output head extends obliquely axially inwardly to form a first guide surface, and the oblique angle of the bottom wall of the guide part is greater than the oblique angle of the first guide surface; or The inner side of the second output head is provided with a plurality of engagement teeth, the guide end of the engagement teeth is provided with two guide inclined surfaces extending obliquely in opposite directions, and the intersection of the two guide inclined surfaces is provided with a protrusion towards the outside; or The guide end of the first output head comprises a first guide surface extending obliquely axially inwardly, the inner side of the first output head is provided with a plurality of engagement teeth, and a second guide surface is further arranged between the engagement teeth and the first guide surface, and the oblique angle of the second guide surface is greater than the oblique angle of the first guide surface; or The guide end of the first output head comprises a first guide surface extending obliquely axially inwardly, and a guide protrusion with an arc surface is arranged on the first guide surface, and the width and thickness of the guide protrusion gradually decrease along the radial direction.

8. The speed reduction mechanism of a food processor according to claim 1, wherein The inner side wall of the box is provided with an inner ring gear, the inner diameter of the inner ring gear is consistent along the axial direction of the box, and the first planetary gear and the second planetary gear are simultaneously in driving engagement with the inner ring gear.

9. A food processor further comprising the speed reduction mechanism according to any one of claims 1 to 8, characterized in that, Further comprising a cutter shaft in driving engagement with the first output head and a cutter sleeve sleeved outside the cutter shaft, the top of the cutter sleeve is in driving engagement with the second output head, wherein the bottom of the cutter shaft is provided with first cutter blades, the outside of the cutter sleeve is provided with second cutter blades, the second cutter blades are higher than the first cutter blades, and the cutter sleeve rotates synchronously with the cutter shaft at a lower speed.

10. The food processor of claim 9, wherein, Further comprising a stirring cup, a cup cover covering the stirring cup, and a main machine installed on the cup cover, the reduction box is installed in the main machine, the cup cover is provided with a mounting groove for inserting the main machine, the bottom wall of the mounting groove is provided with a protruding rib, the bottom wall of the main machine is provided with a slot in plug-in cooperation with the protruding rib, when the slot and the protruding rib are installed in a staggered manner, the pre-engagement distance between the cutter sleeve and the second output head is between 0.5 and 5 mm, and the pre-engagement distance between the cutter shaft and the first output head is between 0.5 and 5 mm; when the slot and the protruding rib are installed in place, the cutter sleeve and the second output head are engaged in place, the cutter shaft and the first output head are engaged in place, and the main machine in a conductive state can be triggered and started by the main machine key.

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