A food processor

Abstract

The utility model belongs to kitchen appliance technical field discloses a kind of food processing machines, including stirring cup, host computer, host computer includes casing, motor and reduction gearbox being arranged in casing, reduction gearbox includes box, gear assembly being installed in box and being driven by motor, first output head being arranged in gear assembly output end, the bottom wall of box is provided with through-hole, the bottom wall of casing is provided with output hole, the hole wall of through-hole is provided with the mounting groove of installing first bearing and first sealing ring, first bearing sleeve is connected in the outer periphery of first output head, first sealing ring and first output head interference sleeve and be located below first bearing, the inner wall of mounting groove is provided with the convex part that projects radially inward to support first bearing. Realize the accurate righting effect of first output head operation, so that first output head rotates smoothly, stable output, processing effect is more uniform, water can also reliably avoid entering host computer and carrying grease from through-hole leakage, avoid the peculiar smell and dirt of host computer.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, specifically relating to a food processing machine. Background Technology

[0002] Meat grinders and other food processing machines on the market are generally divided into two types. One type has a bottom-mounted main unit and a detachable mixing cup installed on top of the main unit. This type of meat grinder is large in size and has a large mixing cup volume, making it suitable for scenarios with large processing needs. Usually, users only disassemble and clean the mixing cup and do not move or wash the bulky main unit.

[0003] Another type of meat grinder has a top-mounted main unit, which is detachably installed above the mixing bowl. These grinders are convenient to handle, take up little space, and have low purchase costs, making them suitable for home use. The main unit typically includes a casing, a motor housed within the casing, and a gearbox. The gearbox is connected to the motor's output end and includes a housing and a gear reduction assembly installed inside. The output head of the gear reduction assembly passes through a through-hole in the housing and an output hole in the casing to connect with the mixing element and drive it to rotate for grinding meat or kneading dough. To avoid interfering with the output head's rotation, traditional grinders use a clearance fit between the output head and the through-hole in the housing, and also a clearance fit between the output head and the output hole in the base, ensuring the output head avoids interference. When selling the product, manufacturers will advise users not to wash the main unit to prevent water from entering through the gap at the output head.

[0004] Based on years of research in the field of food processing machines, the applicant has discovered that because the through holes of the output head and the gearbox, as well as the output hole of the main unit, are all clearance fit, the output head will swing under heavy load conditions such as cutting and kneading meat with tendons, resulting in unstable output. This causes the output head and the output hole to collide, generating significant working noise, and the swinging of the output head leads to uneven cutting of meat particles.

[0005] The applicant also discovered that once water gets into the main unit, such as when the user does not rinse the main unit according to the operating instructions, or when water from the food in the mixing cup splashes into the gaps around the output head and enters the main unit during use, users usually place the main unit directly above the mixing cup after cleaning or using it, that is, with the output hole facing down and directly above the through hole in the cup lid. As a result, some of the water that entered the main unit during rinsing or use will flow downwards due to gravity and flow out again in the opposite direction from the gaps around the output head. When the water flows out, it will carry the lubricating oil from the gearbox out with it, forming dirt and odors around the output hole of the main unit, and may even drip into the mixing cup and contaminate the food.

[0006] Based on this, the applicant wants to develop a food processor that is suitable for home use, solves the problem of output head wobbling, and also prevents water from entering the main unit and causing oil leakage. Utility Model Content

[0007] This utility model provides a food processing machine for a top-mounted and detachable model. While ensuring stable rotation of the output head, it solves the problem that when water enters the main unit due to user rinsing or other reasons, the water flowing back out of the main unit will carry away the grease in the gearbox.

[0008] The technical solution adopted in this utility model is as follows:

[0009] This utility model provides a food processing machine, including a mixing cup with a built-in stirring element and a main unit detachably installed above the mixing cup. The main unit includes a housing, a motor and a gearbox disposed within the housing. The gearbox includes a housing, a gear assembly installed within the housing and driven by the motor, and a first output head disposed at the output end of the gear assembly. The bottom wall of the housing has a through hole, and the bottom wall of the housing has an output hole. The first output head passes through the through hole and the output hole and connects to the stirring element. The wall of the through hole has a mounting groove for mounting a first bearing and a first sealing ring. The first bearing is sleeved on the outer periphery of the first output head, and the first sealing ring is interference-fitted with the first output head and located below the first bearing. The inner wall of the mounting groove has a radially inward protruding part to support the first bearing.

[0010] The food processing machine provided by this utility model achieves the installation of the first bearing and the first sealing ring by setting an installation groove in the through hole wall of the gearbox. The first bearing is sleeved on the outer periphery of the first output head and is limited by the installation groove. When the first output head rotates at high speed, it is radially limited by the first bearing, which suppresses the radial wobble of the first output head and achieves a precise straightening effect on the operation of the first output head. This makes the first output head rotate smoothly and output stably. Especially when driving the stirring blade under heavy load conditions, it can also straighten the first output head well, so as to achieve smooth and uniform cutting by the stirring blade and more uniform processing effect. In addition, by interlocking the first sealing ring with the first output head and placing it below the first bearing, the radial gap between the first output head and the through hole is sealed, achieving a waterproof effect. On the one hand, the first sealing ring prevents water or water droplets splashed during food processing from flowing into the first bearing and the inside of the gearbox, thus extending the life of the gearbox. On the other hand, the first sealing ring also prevents the leakage of grease inside the gearbox. Especially when water enters other parts of the main unit, it reliably prevents water from carrying grease out of the through hole, thereby preventing grease from flowing out of the main unit from the output hole, and preventing odors and dirt from the main unit. By providing a radially inwardly protruding portion on the inner wall of the mounting groove to support the first bearing, the protruding portion supports the first bearing and reliably limits the axial movement of the first bearing. Combined with the radial limiting effect of the mounting groove on the first bearing, a dual positioning effect is achieved for the first bearing. This further ensures the radial deflection limitation of the first bearing on the first output head, achieving smooth power transmission and uniform food processing. At the same time, since the protruding portion forms a rigid support for the first bearing, compared to the form where the first bearing is supported by the first sealing ring, it can not only ensure the stability of the first bearing, but also avoid squeezing the first sealing ring, thereby preventing the first sealing ring from loosening. This ensures the effective and long-lasting sealing effect of the first sealing ring and further prevents the leakage of grease from the gearbox.

[0011] In a preferred embodiment, an annular gap is provided between the first output head and the output hole, and a rib protruding from the bottom wall of the housing and surrounding the output hole is provided. The main unit also includes a second sealing ring clamped between the top of the rib and the bottom of the housing.

[0012] A reinforcing rib is installed on the bottom wall of the housing. A second sealing ring, clamped between the top of the reinforcing rib and the bottom of the housing, provides waterproofing to the main unit from the source, preventing water ingress into the main unit and gearbox, as well as grease leakage. The second sealing ring achieves axial sealing by clamping the top of the reinforcing rib to the bottom of the housing. Compared to a radial sealing method that clamps between the first output head and the output hole, an annular gap can be set between the first output head and the output hole, allowing the bottom wall of the main unit and the first output head to avoid interference with the rotation of the first output head, achieving efficient output. At the same time, it also avoids wear and compression of the second sealing ring by the first output head, making the second sealing ring durable and effective.

[0013] More preferably, the second sealing ring includes a connecting portion fitted around the outer periphery of the rib and a sealing portion extending from the connecting portion to the top of the rib, the sealing portion being axially clamped by the rib and the housing.

[0014] The connecting part achieves a tight fit with the surrounding rib, and the sealing part provides a reliable axial seal between the bottom wall of the casing and the box body. This ensures the stable installation of the second sealing ring, preventing it from falling off, and also achieves a long-lasting and effective seal.

[0015] In a preferred embodiment, the first sealing ring includes a body sandwiched between the first bearing and the protrusion, and a sealing rib with one end connected to the body and the other end being a cantilever end extending toward the first output head. The cantilever end of the sealing rib abuts against the outer peripheral wall of the first output head, and a buffer groove is formed between the sealing rib and the body.

[0016] More preferably, the opening of the buffer groove faces the output end of the host machine;

[0017] Alternatively, the body may be provided with multiple rings of sealing ribs, forming an oil storage groove between two adjacent rings of sealing ribs.

[0018] The first sealing ring is reliably clamped between the first bearing and the protrusion, achieving stable installation. One end of the sealing rib is cantilevered, while the other end connects to the body. The cantilevered end abuts against the outer peripheral wall of the first output head, achieving line contact and improving the sealing effect. Simultaneously, the dynamic sealing between the sealing rib and the first output head prevents direct wear between the first output head and the body, achieving a durable seal. Moreover, even when the outer peripheral wall of the first output head has burrs or dimensional tolerances, the sealing rib ensures that the first output head and the first sealing ring maintain a dynamic seal. Therefore, the body and sealing rib achieve a dual optimization of dynamic sealing and mechanical stability for the first sealing ring. A buffer groove is formed between the sealing rib and the body. This buffer groove acts as a deformation buffer, allowing for flexible deformation of the first sealing ring as a whole. Under pressure, it maintains the radial compression of the sealing rib against the first output head. Even after the sealing rib wears, it maintains contact with the first output head, forming a pressure-self-tightening seal.

[0019] By aligning the opening of the buffer groove with the output end of the main unit, if water accidentally enters the main unit when it is rinsed upside down, the water will be temporarily stored in the buffer groove to prevent it from entering the gearbox. When the main unit is placed upright after cleaning, the water can be discharged directly. More preferably, the opening of the buffer groove is aligned with the radial gap between the first output head and the output hole, so that the water temporarily stored in the buffer groove can be discharged straight out of the main unit when it is placed upright, without obstruction, thus achieving a further waterproof effect.

[0020] Multiple sealing ribs form a multi-level seal, which improves the waterproof and oil-leakage prevention effect of the outer periphery of the first output head. An oil reservoir is formed between two adjacent sealing ribs to provide an oiling space. Through the continuous wetting of the lubricating grease in the oil reservoir, an oil film isolation layer is formed on the outside of the first output head, which rotates smoothly and stably, while preventing water droplets and dust from entering the gearbox.

[0021] In a preferred embodiment, the host includes a second output head coaxially sleeved on the inner circumference of the first output head, the first output head and the second output head output different rotational speeds, and a second bearing and a third sealing ring located below the second bearing are provided in the radial gap between the first output head and the second output head.

[0022] By incorporating a second output head, the first and second output heads operate at different speeds, enabling high-speed and low-speed outputs. This expands the food processor's functionality, allowing for high-speed meat grinding, vegetable chopping, and low-speed dough mixing. A second bearing and a third sealing ring located below the second bearing are positioned between the first and second output heads. This provides radial support to the second output head, ensuring stable output and uniform processing, while also preventing water ingress and oil leakage around the outer circumference of the second output head.

[0023] More preferably, the inner sidewall of the first output head is provided with a support platform for supporting the second bearing;

[0024] The support platform functions similarly to a protrusion, reliably limiting the axial movement of the second bearing and further ensuring the radial sway limit of the second output head, thus achieving smooth power transmission and uniform food processing. Simultaneously, because the support platform provides rigid support for the second bearing, compared to a system where the second bearing is supported by a third sealing ring, it ensures the stability of the second bearing while preventing it from compressing the third sealing ring. This prevents the third sealing ring from loosening, ensuring an effective and durable seal and further preventing grease leakage from the gearbox.

[0025] More preferably, the gear assembly includes a first-stage planetary gear and a first-stage planetary carrier driven by a motor shaft, a second-stage planetary gear and a second-stage planetary carrier driven by the first-stage planetary carrier, the second-stage planetary carrier including a plate body that cooperates with the second-stage planetary gear and a shaft body integrally protruding from the plate body, the shaft body forming the first output head, and the second output head being detachably connected to the first-stage planetary carrier.

[0026] The gear assembly employs the aforementioned two-stage reduction mechanism to achieve different speeds for the first and second output heads, thus expanding the functionality of the food processing machine. Since the shaft of the secondary planetary carrier forms the first output head, fewer connections and assembly steps are added, simplifying the gearbox structure.

[0027] In a preferred embodiment, the second output head is provided with a safety hole and an elastic rod inserted through the safety hole. The elastic rod is fitted with a fourth sealing ring that abuts against the edge of the safety hole. The elastic rod can extend out of the safety hole to separate the stirring element from the second output head. After the main unit and the stirring cup are installed in place, the stirring element compresses the elastic rod to drive the connection with the second output head.

[0028] By incorporating a flexible rod, when the main unit is correctly installed, the stirring element compresses the flexible rod under the weight of the main unit to achieve a transmission connection with the second output head. When the main unit is detached from the stirring cup, the flexible rod extends out of the safety hole, separating the stirring element from the second output head, effectively preventing connection and ensuring user safety. A fourth sealing ring, abutting against the edge of the safety hole, is fitted onto the flexible rod to achieve a waterproof seal at the safety hole location.

[0029] In a preferred embodiment, the main unit further includes a safety switch disposed within the housing, a connecting rod for triggering the safety switch, and a spring sleeved on the connecting rod. The connecting rod is provided with a radially enlarged annular platform. A through hole corresponding to the position of the connecting rod is opened on the bottom wall of the housing. A fifth sealing ring is also sleeved on the outer periphery of the connecting rod. The spring abuts against the upper part of the annular platform, so that when the main unit is detached from the mixing cup, the annular platform is pressed against the edge of the through hole by the elastic force of the spring.

[0030] By setting a fifth sealing ring, the through hole is sealed and waterproofed. At the same time, the spring abuts against the top of the ring platform, so that when the main unit is disassembled from the mixing cup, i.e., when the user may wash the main unit, the ring platform presses the fifth sealing ring tightly against the edge of the through hole. This ensures that water enters the main unit during cleaning and carries out the grease in the gearbox. The ring platform is used to cooperate with the spring to enable the flexible movement of the connecting rod, and at the same time to press the fifth sealing ring. It integrates functions, has a simple structure, and is less prone to the problems of loosening and displacement of the sealing ring that occur when the sealing ring is installed in the through hole in the traditional way. The installation of the fifth sealing ring is stable and the seal is long-lasting and effective.

[0031] In a preferred embodiment, the housing includes an upper cover and a lower cover that enclose and form an installation cavity, the gear assembly is located within the installation cavity, the upper cover and the lower cover are inserted and fixed together, and an annular sealing element is provided at the insertion position of the upper cover and the lower cover.

[0032] The gearbox is assembled conveniently by using an upper and lower cover that are inserted and fixed to enclose the mounting cavity. An annular seal is sandwiched at the insertion point of the upper and lower covers to prevent water from entering the gearbox due to water ingress into the main unit. This prevents water from flowing back into the gearbox through the through-hole and output hole, carrying away the grease inside. Simultaneously, it also prevents water ingress into the gearbox from causing grease flow, which could lead to decreased meshing accuracy of the gear assembly and transmission noise.

[0033] In a preferred embodiment, the housing includes a cover with an opening at the lower end and a base fixed to the opening of the cover. The inner side of the cover is provided with a buckle extending toward the base, and an annular slot is formed between the buckle and the inner side of the cover. The base is provided with an annular insert for insertion into the slot. A waterproof component is provided in the slot, and the insert presses the waterproof component tightly in the slot.

[0034] By employing a cover and a base fixed at the opening of the cover, convenient assembly of the main unit is achieved. A ring-shaped slot is formed between the inverted buckle and the inner side of the cover. The base's reinforcing ribs press the waterproof component firmly into the slot. This achieves a flexible connection between the base and the cover, reducing assembly tolerances and mechanical collision noise during operation. It also ensures reliable installation of the waterproof component, extends the water inlet path of the main unit, increases the difficulty of water ingress, and improves the waterproof sealing effect of the casing. The simple inverted structure makes the cover molding and processing easy, reducing costs.

[0035] In a preferred embodiment, the mounting groove includes a first mounting groove for receiving a first bearing and a second mounting groove for receiving a first sealing ring, the second mounting groove being concave relative to the inner diameter of the first mounting groove, and the protrusion being a stepped surface formed at the connection between the first mounting groove and the second mounting groove.

[0036] By narrowing the inner diameter of the second mounting groove relative to the first mounting groove, a stepped surface is formed to provide more reliable and stable support for the first bearing, thereby achieving a good radial alignment effect for the first output head. Simultaneously, during installation, the first sealing ring and the first bearing can be sequentially installed into the second and first mounting grooves, achieving effortless installation of the first sealing ring and avoiding deformation or incomplete installation during the process, thus ensuring waterproofing and oil leakage prevention. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0038] Figure 1 This is a cross-sectional structural diagram of a food processing machine according to one embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the drive mechanism inside the host in one embodiment of the present invention;

[0040] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0041] Figure 4 This is a schematic diagram showing the installation of the first bearing and the first sealing ring in one embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the first sealing ring in one embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the host structure in one embodiment of the present invention;

[0044] Figure 7 This is an enlarged view of a partial structure of the host in one embodiment of the present invention;

[0045] Figure 8 This is a partial structural diagram of the gearbox in one embodiment of the present invention;

[0046] Figure 9 This is an enlarged view of a partial structure of the host in one embodiment of the present invention;

[0047] Figure 10 This is a schematic diagram of the elastic rod in one embodiment of the present invention;

[0048] Figure 11 This is a schematic diagram showing the interaction between the main unit and the stirring component in a disassembled state according to one embodiment of the present invention.

[0049] Figure 12 This is an enlarged schematic diagram of the connecting rod in the host unit according to one embodiment of the present invention;

[0050] Figure 13 This is a schematic diagram of the host structure in one embodiment of the present invention;

[0051] Figure 14 This is a schematic diagram of the installation of the waterproof component in one embodiment of the present invention;

[0052] Figure 15 This is a schematic diagram of the installation of the waterproof component in another embodiment of the present invention.

[0053] List of components and reference numerals:

[0054] 10. Main unit; 11. Housing; 110. Output port; 111. Cover; 112. Base; 1121. Insert rib; 113. Inverted clip; 114. Slot; 115. Surrounding rib; 12. Motor; 13. Gearbox; 130. Through hole; 1301. Protrusion; 131. First output head; 132. Second output head; 1321. Safety hole; 1322. Elastic rod; 1323. Compression spring; 1324. Boss ; 133, housing; 134, gear assembly; 20, stirring cup; 21, stirring component; 31, first bearing; 32, second bearing; 41, first sealing ring; 411, body; 412, sealing rib; 413, buffer groove; 42, second sealing ring; 43, third sealing ring; 44, fourth sealing ring; 45, fifth sealing ring; 50, waterproof component; 60, connecting rod; 61, spring; 62, ring platform; 63, through hole. Detailed Implementation

[0055] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0056] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0057] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] like Figure 1As shown, in a preferred embodiment, this utility model provides a food processing machine, including a mixing cup 20 with a built-in stirring element 21 and a main unit 10 detachably mounted above the mixing cup 20. The main unit 10 includes a housing 11, a motor 12 disposed within the housing 11, and a reduction gearbox 13. Figure 2 As shown, the gearbox 13 includes a housing 133, a gear assembly 134 installed inside the housing 133 and driven by a motor 12, and a first output head 131 disposed at the output end of the gear assembly 134. A through hole 130 is provided in the bottom wall of the housing 133. Figure 1 The bottom wall of the housing 11 is provided with an output hole 110. The first output head 131 passes through the through hole 130 and the output hole 110 and is connected to the stirring component 21. The wall of the through hole 130 is provided with a mounting groove for installing the first bearing 31 and the first sealing ring 41. The first bearing 31 is sleeved on the outer periphery of the first output head 131. The first sealing ring 41 is interference-fitted with the first output head 131 and is located below the first bearing 31. The inner wall of the mounting groove is provided with a radially inward protruding part 1301 to support the first bearing 31.

[0061] The food processing machine provided by this utility model achieves the installation of the first bearing 31 and the first sealing ring 41 by setting an installation groove in the wall of the through hole 130 of the gearbox 13. The first bearing 31 is sleeved on the outer periphery of the first output head 131 and is limited by the installation groove. When the first output head 131 rotates at high speed, it is radially limited by the first bearing 31, which suppresses the radial wobble and floating of the first output head 131 and achieves a precise straightening effect on the operation of the first output head 131. This makes the first output head 131 rotate smoothly and output stably. Especially when driving the stirring blade under heavy load, it can also straighten the first output head 131 well, so as to achieve smooth and uniform cutting of the stirring blade and more uniform processing effect. In addition, by interlocking the first sealing ring 41 with the first output head 131 and placing it below the first bearing 31, the radial gap between the first output head 131 and the through hole 130 is sealed, achieving a waterproof effect. On the one hand, the first sealing ring 41 prevents water or water droplets splashed during food processing from flowing into the first bearing 31 and the inside of the gearbox 13, thus extending the life of the gearbox 13. On the other hand, the first sealing ring 41 also prevents the leakage of grease inside the gearbox 13. Especially when water enters other parts of the main unit 10, it reliably prevents water from carrying grease out of the through hole 130, thereby preventing grease from flowing out of the main unit 10 from the output hole 110, and preventing odors and dirt from the main unit 10. By providing a radially inward protruding portion 1301 on the inner wall of the mounting groove to support the first bearing 31, the protruding portion 1301 supports the first bearing 31 and reliably limits the axial movement of the first bearing 31. Combined with the radial limiting effect of the mounting groove on the first bearing 31, a dual positioning effect for the first bearing 31 is achieved, further ensuring the radial sway limitation of the first output head 131, achieving smooth power transmission and uniform food processing. At the same time, since the protruding portion 1301 forms a rigid support for the first bearing 31, compared with the form in which the first bearing 31 is supported by the first sealing ring 41, it can not only ensure the stability of the first bearing 31, but also avoid squeezing the first sealing ring 41, thereby preventing the first sealing ring 41 from loosening, ensuring the effective and long-lasting sealing effect of the first sealing ring 41, and further preventing the leakage of grease in the gearbox 13.

[0062] like Figure 2 , 3 As shown in Figure 4, in a preferred embodiment, the mounting groove includes a first mounting groove for accommodating the first bearing 31 and a second mounting groove for accommodating the first sealing ring 41. The inner diameter of the second mounting groove is reduced relative to that of the first mounting groove, and the protrusion 1301 is a stepped surface formed at the connection between the first mounting groove and the second mounting groove.

[0063] By reducing the inner diameter of the second mounting groove relative to the first mounting groove, a stepped surface is formed to provide more reliable and stable support for the first bearing 31, thereby achieving a good radial alignment effect for the first output head 131. Simultaneously, during installation, the first sealing ring 41 and the first bearing 31 can be sequentially installed into the second mounting groove and the first mounting groove, respectively, achieving effortless installation of the first sealing ring 41 and avoiding deformation or incomplete installation during the process, thus ensuring waterproofing and oil leakage prevention.

[0064] Of course, in other embodiments, the protrusion 1301 can be an annular plate or rib protruding from the inner wall of the mounting groove to separate the first mounting groove and the second mounting groove. This arrangement still achieves reliable support for the first bearing, and the first sealing ring can be flexibly deformed to fit into the second mounting groove.

[0065] This invention does not limit the structure of the first sealing ring 41, for example, as Figure 4 , 5 As shown, the first sealing ring 41 includes a body 411 sandwiched between the first bearing 31 and the protrusion 1301, and a sealing rib 412 with one end connected to the body 411 and the other end being a cantilever end extending toward the first output head 131. The cantilever end of the sealing rib 412 abuts against the outer peripheral wall of the first output head, and a buffer groove 413 is formed between the sealing rib 412 and the body 411.

[0066] More preferably, the opening of the buffer groove 413 faces the output end of the host 10 (e.g., Figure 1 (Lower end of the main unit); More specifically, the groove of the buffer groove 413 is directly opposite the annular gap between the first output head 131 and the output hole 110. It can be understood that when the stirring element 21 is sleeved on the outer periphery of the first output head 131, the annular gap is the insertion gap of the stirring element 21.

[0067] More preferably, the body 411 is provided with multiple sealing ribs 412, forming an oil storage groove between two adjacent sealing ribs.

[0068] The first sealing ring 41 is reliably clamped between the first bearing 31 and the protrusion 1301 by its body 411, achieving stable installation. One end of the sealing rib 412 is cantilevered, and the other end is connected to the body 411. The cantilevered end abuts against the outer peripheral wall of the first output head, achieving line contact and improving the sealing effect. At the same time, the dynamic sealing between the sealing rib 412 and the first output head 131 prevents the first output head 131 from directly wearing against the body 411, achieving a durable seal. Moreover, when the outer peripheral wall of the first output head has burrs or dimensional tolerances, the sealing rib can ensure that the first output head and the first sealing ring always maintain a dynamic sealing state. Therefore, the body 411 and the sealing rib 412 achieve a dual optimization of dynamic sealing and mechanical stability of the first sealing ring 41. A buffer groove 413 is formed between the sealing rib 412 and the body 411. The buffer groove 413 serves as a deformation buffer zone, enabling the flexible deformation of the first sealing ring 41 as a whole. Under pressure, it can maintain the radial pressing state of the sealing rib 412 against the first output head 131. Even after the sealing rib 412 is worn, it can still maintain the contact force with the first output head 131, forming a pressure self-tightening sealing effect.

[0069] By aligning the opening of the buffer groove 413 with the output end of the main unit 10, if water accidentally enters the main unit 10 when it is rinsed upside down, the water will be temporarily stored in the buffer groove 413 and will not enter the gearbox 13. When the main unit 10 is placed upright after cleaning, the water will be discharged, achieving a further waterproof effect. More preferably, the opening of the buffer groove is aligned with the annular gap between the first output head and the output hole, so that when the main unit is placed upright, the water temporarily stored in the buffer groove can be discharged straight out of the main unit without obstruction.

[0070] The multi-ring sealing ribs form a multi-level seal, which improves the waterproof and oil-proof effect of the outer periphery of the first output head 131. An oil reservoir is formed between two adjacent sealing ribs to provide an oiling space. Through the continuous wetting of the lubricating grease in the oil reservoir, an oil film isolation layer is formed on the outside of the first output head 131, which rotates smoothly and stably, while preventing water droplets and dust from entering the gearbox 13.

[0071] like Figure 6 , 7 As shown, in a preferred embodiment, an annular gap is provided between the first output head 131 and the output hole 110, and the bottom wall of the housing 11 is provided with a surrounding rib 115 protruding from the bottom wall of the box 133 and surrounding the output hole 110. The main unit 10 also includes a second sealing ring 42 clamped between the top of the surrounding rib 115 and the bottom of the box 133.

[0072] A reinforcing rib 115 is provided on the bottom wall of the housing 11. A second sealing ring 42, clamped between the top of the reinforcing rib 115 and the bottom of the housing 133, ensures waterproofing of the main unit 10 from the source, preventing water ingress into the main unit 10 and gearbox 13, as well as grease leakage. The second sealing ring 42 achieves axial sealing by clamping the top of the reinforcing rib 115 and the bottom of the housing 133. Compared with the radial sealing method of clamping between the first output head 131 and the output hole 110, an annular gap can be set between the first output head 131 and the output hole 110, allowing the bottom wall of the main unit 10 and the first output head 131 to avoid interference with the rotation of the first output head 131, achieving efficient output. At the same time, it also avoids wear and compression of the second sealing ring 42 by the first output head 131, making the second sealing ring 42 durable and effective.

[0073] like Figure 7 As shown, more preferably, the second sealing ring 42 includes a connecting portion 422 sleeved on the outer periphery of the surrounding rib 115 and a sealing portion 421 extending from the connecting portion to the top of the surrounding rib 115. The sealing portion 421 is axially clamped by the surrounding rib 115 and the housing 133.

[0074] The connecting part achieves a tight fit with the surrounding rib 115, and the sealing part provides a reliable axial seal between the bottom wall of the housing 11 and the box 133, which not only ensures the stable installation of the second sealing ring 42 and prevents it from falling off, but also achieves a long-lasting and effective seal.

[0075] It should be noted that the main unit 10 of the food processing machine provided by this utility model can output a rotational speed for grinding meat or kneading dough. Preferably, the food processing machine is a multi-functional food processing machine that can perform both meat grinding and dough kneading. Specifically, the reduction gearbox 13 can adopt a two-stage reduction mechanism.

[0076] like Figure 8 As shown, in a preferred embodiment, the main unit 10 includes a second output head 132 coaxially sleeved on the inner circumference of the first output head 131. The first output head 131 and the second output head 132 output different rotational speeds. A second bearing 32 and a third sealing ring 43 located below the second bearing 32 are disposed in the radial gap between the first output head 131 and the second output head 132. More preferably, a support platform for supporting the second bearing 32 is provided on the inner sidewall of the first output head. Specifically, the first output head 131 includes a hollow shaft sleeved on the outer circumference of the second output head, and the aforementioned support platform is provided on the inner sidewall of the shaft.

[0077] Combination Figure 1 , 2 As shown in Figures 8 and 9, in this embodiment, the third sealing ring 43 can be selected as the structural form of the first sealing ring 41 provided by this utility model.

[0078] By setting a second output head 132, the first output head 131 and the second output head 132 output at different speeds, achieving high-speed and low-speed output, thus expanding the multiple functions of the food processor, such as high-speed meat grinding, vegetable chopping, and low-speed dough kneading. A second bearing 32 and a third sealing ring 43 located below the second bearing 32 are provided between the first output head 131 and the second output head 132. This provides radial support for the second output head 132 to achieve stable output and uniform processing, while preventing water ingress and oil leakage around the outer circumference of the second output head 132.

[0079] The support platform functions similarly to the protrusion 1301, reliably limiting the axial movement of the second bearing 32 and further ensuring the radial sway limit of the second output head 132, thus achieving smooth power transmission and uniform food processing. Simultaneously, because the support platform provides rigid support for the second bearing 32, compared to the second bearing 32 being supported by the third sealing ring 43, it ensures the stability of the second bearing 32 while preventing it from compressing the third sealing ring 43, thereby preventing loosening of the third sealing ring 43 and ensuring its effective and durable sealing effect, further preventing grease leakage from the gearbox 13.

[0080] like Figure 2 , 8 As shown, the gearbox has a specific structure consisting of a gear assembly 134, which includes a first-stage planetary gear 1341 and a first-stage planetary carrier 1342 driven by the shaft of the motor 12, a second-stage planetary gear 1343 and a second-stage planetary carrier 1344 driven by the first-stage planetary carrier 1342, and the second-stage planetary carrier includes a plate that cooperates with the second-stage planetary gear and a hollow shaft integrally protruding from the plate. The hollow shaft forms a first output head 131, and the second output head 132 is detachably connected to the first-stage planetary carrier 1341.

[0081] Preferably, in this embodiment, the stirring components include a first stirring component and a second stirring component. The first stirring component is sleeved on the outer circumference of the shaft of the first output head and engages with the shaft to prevent rotation, thus achieving a transmission connection. Since the second output head is sleeved on the inner circumference of the first output head, preferably, the second output head includes a hollow shaft portion, and the second stirring component is inserted into the hollow shaft portion of the second output head, engaging with the hollow shaft portion to prevent rotation, thus achieving a transmission connection. Of course, if the radial clearance between the first and second output heads allows, the second stirring component can also be sleeved on the outer circumference of the second output head, or the first stirring component can be inserted into the inner side of the first output head.

[0082] The gear assembly 134 employs the aforementioned two-stage reduction mechanism to achieve different speeds for the first output head 131 and the second output head 132, thus expanding the various functions of the food processing machine. Since the shaft of the second-stage planetary carrier forms the first output head 131, fewer connections and assembly are required, simplifying the structure of the gearbox 13.

[0083] Of course, in other embodiments, the second output head 132 can also be fixedly connected to the first-stage planetary carrier. Furthermore, in other embodiments, the reduction gearbox 13 is a first-stage reduction gearbox 13, the first output head 131 is driven by the reduction gearbox 13 after reduction, and the second output head 132 is directly driven by the motor shaft 12. Additionally, the first output head 131 can also be detachably connected to the second-stage planetary carrier.

[0084] like Figure 9 , 10 As shown in Figure 11, in a preferred embodiment, the second output head 132 is provided with a safety hole 1321 and an elastic rod 1322 passing through the safety hole 1321. The elastic rod 1322 is fitted with a fourth sealing ring 44 that abuts against the edge of the safety hole 1321. The elastic rod 1322 abuts against a compression spring 1323, allowing it to extend out of the safety hole 1321 to separate the stirring element 21 from the second output head 132. After the main unit 10 and the stirring cup 20 are installed in place, the stirring element 21 compresses the elastic rod 1322 and the compression spring 1323 to achieve a transmission connection with the second output head 132. Figure 11 As shown, preferably, the elastic rod 1322 is provided with a boss 1324 that abuts against the compression spring 1323. After the main unit 10 is removed from the stirring cup 20, the boss 1324 presses the fourth sealing ring 44 against the edge of the safety hole 1321.

[0085] By setting the elastic rod 1322, when the main unit 10 is correctly installed, the stirring element 21 compresses the elastic rod 1322 under the gravity of the main unit 10 to achieve a transmission connection with the second output head 132. However, when the main unit 10 is detached from the stirring cup 20, for example... Figure 11 As shown, when the main unit is inverted, the elastic rod 1322 extends out of the safety hole 1321, separating the stirring element 21 from the second output head 132. This effectively prevents the stirring element 21 from connecting to the second output head 132, ensuring user safety. A fourth sealing ring 44, which abuts against the edge of the safety hole 1321, is fitted onto the elastic rod 1322, achieving a waterproof seal at the safety hole 1321.

[0086] Of course, such as Figure 11 As shown, this embodiment is based on a main unit with two output ends, namely a first output head and a second output head, to achieve different speed outputs. The aforementioned safety rod is installed on the second output head. In practice, when the main unit only has a first output head, a safety hole, a corresponding safety rod, and a corresponding fourth sealing ring can be provided on the first output head.

[0087] like Figure 12 and combined Figure 1As shown, in a preferred embodiment, the main unit 10 further includes a safety switch disposed in the housing 11, a connecting rod 60 for triggering the safety switch, and a spring 61 sleeved on the connecting rod 60. The connecting rod 60 is provided with a radially enlarged annular platform 62. A through hole 63 corresponding to the position of the connecting rod 60 is opened on the bottom wall of the housing 11. A fifth sealing ring 45 is also sleeved on the outer periphery of the connecting rod 60. The spring 61 abuts against the top of the annular platform 62, so that when the main unit 10 is detached from the mixing cup 20, the annular platform 62 presses the fifth sealing ring 45 tightly against the edge of the through hole 63.

[0088] By setting a fifth sealing ring 45, the through hole 63 is sealed and waterproofed. At the same time, the spring 61 abuts against the top of the ring platform 62, so that when the main unit 10 is disassembled from the mixing cup 20, that is, when the user may wash the main unit 10, the ring platform 62 presses the fifth sealing ring 45 tightly against the edge of the through hole 63. This ensures that the main unit 10 is protected from water ingress due to cleaning, which may cause the grease in the gearbox 13 to be carried out. The ring platform 62 is used to cooperate with the spring 61 to realize the flexible movement of the connecting rod 60, and at the same time to press the fifth sealing ring 45. The functions are integrated, the structure is simple, and the fifth sealing ring 45 is not easy to loosen or shift. The installation of the fifth sealing ring 45 is stable and the seal is long-lasting and effective.

[0089] Optionally, the fifth sealing ring 45 can be fitted and fixed to the connecting rod 60. Although the fifth sealing ring will move with the connecting rod 60 after the main unit is installed in the mixing cup, the mixing cup lid will prevent water from splashing into the main unit due to water in the food, thus making the installation of the fifth sealing ring easier. Of course, the fifth sealing ring 45 can also be fixed to the edge of the through hole 63, such as by adhesive or a limiting groove, to achieve a fixed installation of the fifth sealing ring.

[0090] like Figure 13 , 14 As shown, in a preferred embodiment, the housing 11 includes a cover 111 with an opening at the lower end and a base 112 fixed to the opening of the cover 111. An inverted buckle 113 protrudes from the inner side of the cover 111 and extends toward the base 112. An annular slot 114 is formed between the inverted buckle 113 and the inner side of the cover 111. The base 112 is provided with an annular insert rib 1121 that inserts into the slot 114. A waterproof component 50 is disposed within the slot 114, and the insert rib 1121 presses the waterproof component 50 tightly within the slot 114. Optionally, as... Figure 14 As shown, the waterproof component 50 is fixed inside the slot 114 and pressed against the bottom wall of the slot 114 by the top of the insert rib 1121.

[0091] In another implementation, such as Figure 15 As shown, the waterproof component 50 is sleeved on the outer periphery of the insert 1121 and pressed against the inner wall of the slot 114 by the insert 1121.

[0092] By employing a cover 111 and a base 112 fixed at the opening of the cover 111, the main unit 10 can be easily assembled. An annular slot 114 is formed between the inverted buckle 113 and the inner side of the cover 111. The insert rib 1121 of the base 112 presses the waterproof component 50 tightly within the slot 114. This achieves a flexible connection between the base 112 and the cover 111, reducing assembly tolerances and mechanical collision noise during operation. It also ensures reliable installation of the waterproof component 50, extends the water inlet path of the main unit 10, increases the difficulty of water inlet to the main unit 10, and improves the waterproof sealing effect of the casing 11. The simple structure of the inverted buckle 113 makes the cover 111 easy to form and process, reducing costs.

[0093] In a preferred embodiment, the housing 133 includes an upper cover and a lower cover that enclose and form an installation cavity, a gear assembly 134 is located in the installation cavity, the upper cover and the lower cover are inserted and fixed, and an annular sealing element is clamped at the insertion position of the upper cover and the lower cover.

[0094] The gearbox 13 is easily assembled by using an upper and lower cover that are inserted and fixed to enclose the mounting cavity. An annular seal is provided at the insertion point of the upper and lower covers to prevent water from entering the gearbox 13 due to water ingress into the main unit 10. This prevents water from flowing back into the gearbox 13 through the through hole 130 and output hole 110, carrying away the grease inside the gearbox 13. Simultaneously, it also prevents water ingress into the gearbox 13 from causing grease flow, which could lead to decreased meshing accuracy of the gear assembly 134 and transmission noise.

[0095] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0096] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0097] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A food processing machine, comprising a mixing cup with a built-in mixing element and a main unit detachably mounted above the mixing cup, the main unit comprising a housing, a motor and a gearbox disposed within the housing, the gearbox comprising a housing body, a gear assembly mounted within the housing body and driven by the motor, and a first output head disposed at the output end of the gear assembly, a through hole provided in the bottom wall of the housing body, an output hole provided in the bottom wall of the housing, the first output head passing through the through hole and the output hole and connected to the mixing element, characterized in that, The through hole has a mounting groove for mounting a first bearing and a first sealing ring. The first bearing is sleeved on the outer periphery of the first output head, and the first sealing ring is interference-fitted with the first output head and located below the first bearing. The inner wall of the mounting groove has a radially inward protrusion to support the first bearing.

2. The food processing machine according to claim 1, characterized in that, An annular gap is provided between the first output head and the output hole. The bottom wall of the housing is provided with a rib that protrudes around the output hole towards the bottom wall of the box. The main unit also includes a second sealing ring that is clamped between the top of the rib and the bottom of the box.

3. A food processing machine according to claim 2, characterized in that, The second sealing ring includes a connecting portion fitted around the outer periphery of the rib and a sealing portion extending from the connecting portion to the top of the rib, the sealing portion being axially clamped by the rib and the housing.

4. A food processing machine according to claim 1, characterized in that, The first sealing ring includes a body sandwiched between the first bearing and the protrusion, and a sealing rib with one end connected to the body and the other end being a cantilever end extending toward the first output head. The cantilever end of the sealing rib abuts against the outer peripheral wall of the first output head, and a buffer groove is formed between the sealing rib and the body.

5. A food processing machine according to claim 4, characterized in that, The opening of the buffer groove faces the output end of the host computer; Alternatively, the body may be provided with multiple rings of sealing ribs, forming an oil storage groove between two adjacent rings of sealing ribs.

6. A food processing machine according to claim 1, characterized in that, The main unit includes a second output head coaxially sleeved on the inner circumference of the first output head. The first output head and the second output head output different rotational speeds. A second bearing and a third sealing ring located below the second bearing are provided in the radial gap between the first output head and the second output head.

7. A food processing machine according to claim 6, characterized in that, The inner wall of the first output head is provided with a support platform for supporting the second bearing; Alternatively, the gear assembly includes a first-stage planetary gear and a first-stage planetary carrier driven by a motor shaft, a second-stage planetary gear and a second-stage planetary carrier driven by the first-stage planetary carrier, the second-stage planetary carrier including a plate that mates with the second-stage planetary gear and an integrally protruding shaft from the plate, the shaft forming the first output head, and the second output head being detachably connected to the first-stage planetary carrier.

8. A food processing machine according to claim 6, characterized in that, The second output head is provided with a safety hole and an elastic rod inserted through the safety hole. The elastic rod is fitted with a fourth sealing ring that abuts against the edge of the safety hole. The elastic rod can extend out of the safety hole to separate the stirring element from the second output head. After the main unit and the stirring cup are installed in place, the stirring element compresses the elastic rod to drive the connection with the second output head.

9. A food processing machine according to claim 1, characterized in that, The main unit also includes a safety switch disposed inside the housing, a connecting rod for triggering the safety switch, and a spring sleeved on the connecting rod. The connecting rod is provided with a radially enlarged annular platform. A through hole corresponding to the position of the connecting rod is opened on the bottom wall of the housing. A fifth sealing ring is also sleeved on the outer periphery of the connecting rod. The spring abuts against the top of the annular platform, so that when the main unit is detached from the mixing cup, the annular platform presses the fifth sealing ring tightly against the edge of the through hole.

10. A food processing machine according to claim 1, characterized in that, The housing includes an upper cover and a lower cover that enclose and form an installation cavity. The gear assembly is located inside the installation cavity. The upper cover and the lower cover are inserted and fixed together. An annular sealing element is provided at the insertion position of the upper cover and the lower cover. Alternatively, the housing includes a cover with an opening at the lower end and a base fixed at the opening of the cover. The inner side of the cover is provided with a buckle extending toward the base. An annular slot is formed between the buckle and the inner side of the cover. The base is provided with an annular insert for inserting into the slot. A waterproof component is provided in the slot. The insert presses the waterproof component tightly in the slot. Alternatively, the mounting groove may include a first mounting groove for accommodating a first bearing and a second mounting groove for accommodating a first sealing ring, wherein the second mounting groove is narrower than the inner diameter of the first mounting groove, and the protrusion is a stepped surface formed at the connection between the first mounting groove and the second mounting groove.

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