Lifting mechanism of food processor

Abstract

The utility model relates to the technical field of food processing machines, in particular to a lifting mechanism of a food processing machine. The cutter shaft is rotatably arranged relative to the connecting platform and is movably arranged along the axial direction of the cutter shaft relative to the connecting platform; the sleeve is internally provided with a mounting space, a first threaded structure is arranged in the mounting space, the cutter shaft is provided with a second threaded structure, and the first threaded structure is in threaded connection with the second threaded structure; the driving module is in transmission connection with the cutter shaft so as to drive the cutter shaft to rotate relative to the connecting platform; when the rotating speed difference exists between the sleeve and the cutter shaft, the second thread structure is matched with the first thread structure to drive the cutter shaft to move in the axial direction. The single driving module is adopted to drive the cutter shaft to rotate and move, and the single driving module has the advantages of being simple in structure and low in manufacturing cost. The scheme that the cutter shaft extends into the sleeve to achieve threaded transmission is adopted, compared with the prior art, parts such as a guide rod can be omitted, and the overall structure and the assembling process are optimized.

Description

Technical Field

[0001] This utility model relates to the field of food processing machine technology, and in particular to a lifting mechanism for a food processing machine. Background Technology

[0002] Prior art, such as Chinese utility model patent document CN216674577U, discloses a micro-purifier, which includes a housing, a platform, a position motor, and a drive motor. The platform is movably positioned within the housing between a first position and a second position. The position motor is mounted on the housing and coupled to the platform, such that the position motor can be used to move the platform between the first position and the second position. The drive motor can be used to rotate a power shaft relative to the platform. The drive motor is mounted on the platform such that the drive motor and the power shaft move together with the platform between the first position and the second position in response to the position motor.

[0003] Based on the above, in the existing technology, two motors are used to drive the power shaft to move and rotate respectively. This dual-motor structure has the problem of high manufacturing cost and needs further improvement. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a lifting mechanism for a food processing machine employing a single drive module.

[0005] A lifting mechanism for a food processing machine designed for this purpose includes: a connecting platform; a cutter shaft, which is rotatably disposed relative to the connecting platform and movable relative to the connecting platform along the axial direction of the cutter shaft; a sleeve, the sleeve having an installation space inside, the installation space having a first threaded structure, the cutter shaft having a second threaded structure, the first threaded structure and the second threaded structure being threadedly connected; and a drive module, the drive module being drively connected to the cutter shaft to drive the cutter shaft to rotate relative to the connecting platform; when there is a speed difference between the sleeve and the cutter shaft, the second threaded structure cooperates with the first threaded structure to drive the cutter shaft to move along its axial direction.

[0006] Preferably, the sleeve is rotatably disposed relative to the connecting platform; a differential module is used to apply a constraint force to the sleeve so that there is a speed difference between the rotational speed of the sleeve and the rotational speed of the cutter shaft.

[0007] Preferably, the sleeve is fixedly mounted on the connecting platform.

[0008] Preferably, the first threaded structure is a threaded groove provided in the installation space; the second threaded structure includes a connecting nut provided on the cutter shaft, and the connecting nut is threadedly connected to the threaded groove.

[0009] Preferably, the cutter shaft is detachably connected to the connecting nut.

[0010] Preferably, the connecting nut is provided with a coupling space, the cutter shaft is provided with a coupling connection part, and the coupling connection part is movably inserted into the coupling space; the connecting nut is provided with a locking structure for constraining the coupling connection part to remain in the coupling space.

[0011] Preferably, the locking structure includes a locking groove provided in the coupling connection portion, the connecting nut having a channel communicating with the locking groove, and a locking member movably disposed in the channel and capable of being embedded in the locking groove; a retainer is sleeved on the outside of the connecting nut, the retainer being movably disposed relative to the connecting nut, and the retainer having a retaining rib; the retaining rib abuts against the locking member, thereby constraining the locking member to remain within the locking groove.

[0012] Preferably, the locking structure further includes a first elastic element, which applies a force to the retainer to keep the retainer in the locked position and to make the retaining rib abut against the locking member; the sleeve is movably provided with an unlocking trigger, which is provided with an unlocking trigger part, which can abut against the retainer to push the retainer from the locked position to the unlocked position.

[0013] Preferably, the differential module includes a stator magnetic pole fixedly installed in the food processing machine, a rotor rotatably installed inside the stator magnetic pole, a coil installed inside the stator magnetic pole, and a sleeve having a connecting part fixedly connected to the rotor.

[0014] Preferably, the differential module includes a friction resistance element and a driving component; the friction resistance element is rotatably or movable relative to the connecting platform, and when the friction resistance element rotates or moves relative to the connecting platform, it gradually comes into contact with the sleeve or gradually moves away from the sleeve; the driving component drives the friction resistance element to rotate or move relative to the connecting platform.

[0015] Compared with the prior art, this utility model uses a single drive module to drive the cutter shaft to rotate. Furthermore, under the threaded connection between the first and second threaded structures, when there is a speed difference between the sleeve and the cutter shaft, the second threaded structure cooperates with the first threaded structure to drive the cutter shaft to move axially. This application uses a single drive module to complete the rotation and movement of the cutter shaft, which has the advantages of simple structure and low manufacturing cost. Moreover, this application uses a scheme where the cutter shaft extends into the sleeve to achieve threaded transmission, which eliminates the need for guide rods and other components compared to the prior art, optimizing the overall structure and assembly process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is one of the cross-sectional structural schematic diagrams of this utility model;

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0020] Figure 5 This is the second cross-sectional structural schematic diagram of the present invention;

[0021] Figure 6 This is a three-dimensional structural diagram of the cutter shaft and the cutting tool;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the cutter shaft and the cutting tool;

[0023] Figure 8 This is the third cross-sectional structural schematic diagram of this utility model;

[0024] Figure 9 for Figure 8 Enlarged structural diagram at point C;

[0025] Figure 10 This is a schematic diagram of the differential module. Detailed Implementation

[0026] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0029] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0030] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0032] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "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 the embodiments of this application 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 the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" 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 or an electrical 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] like Figures 1-10 As shown, a food processing machine includes: a connecting platform 10; a bowl 100 having a processing chamber 101 inside; a blade shaft 30 rotatably disposed relative to the connecting platform 10 and movable relative to the connecting platform 10 along the axial direction of the blade shaft 30, the blade shaft 30 extending at least partially into the processing chamber 101; and a blade 310 connected to the blade shaft 30. A sleeve 20 has an internal mounting space 200, within which a first threaded structure 210 is provided. A cutter shaft 30 has a second threaded structure 40, with the first threaded structure 210 and the second threaded structure 40 threadedly connected. A drive module 60 is connected to the cutter shaft 30 to drive it to rotate relative to the connecting platform 10. When there is a speed difference between the sleeve 20 and the cutter shaft 30, the second threaded structure 40 cooperates with the first threaded structure 210 to drive the cutter shaft 30 to move axially.

[0035] Example 1 of connecting sleeve 20 and connecting platform 10: The sleeve 20 is fixedly connected to the connecting platform 10. When the sleeve 20 is fixed, the cutter shaft 30 rotates relative to the connecting platform 10, and there is a speed difference between the cutter shaft 30 and the sleeve 20. At this time, the second thread structure 40 cooperates with the first thread structure 210 to drive the cutter shaft 30 to move along its axial direction.

[0036] Example 2 of connecting sleeve 20 and connecting platform 10: The sleeve 20 is rotatably arranged relative to the connecting platform 10; differential module 50 is used to apply a constraint force to the sleeve 20 so that there is a speed difference between the rotational speed of the sleeve 20 and the rotational speed of the cutter shaft 30.

[0037] The operating principle of this food processing machine is as follows: The food material to be processed is placed in the processing chamber 101 of the bowl 100. The bowl 100 is then assembled and fixed to the food processing machine, ensuring it does not rotate relative to the connecting platform 10. The drive module 60 is activated, driving the cutter shaft 30 to rotate, which in turn drives the cutter 310 to perform rotary cutting. During the activation of the drive module 60, the movement of the cutter shaft 30 is controlled by the differential speed module 50. When the sleeve is not subject to constraint, the sleeve and cutter shaft rotate synchronously without any speed difference. In this mode, the cutter shaft does not move relative to the sleeve, allowing the cutter to maintain a consistent position for rotary cutting. When the differential speed module applies a constraint force to the sleeve, a speed difference exists. Under the action of the first and second threaded structures, the cutter shaft rotates while simultaneously moving relative to the sleeve along its axial direction. The greater the speed difference, the faster the cutter shaft moves relative to the sleeve. It enables intelligent speed adjustment based on different rotary cutting needs to achieve thorough rotary cutting of food materials.

[0038] like Figure 1 As shown, the connecting platform 10 is provided with a fixed bracket 110, one end of the sleeve 20 is rotatably connected to the connecting platform 10, and the other end of the sleeve 20 is rotatably connected to the fixed bracket 110.

[0039] like Figure 3 As shown, the connecting platform 10 is rotatably equipped with a bushing 300, and the cutter shaft 30 is axially movable within the bushing 300; the bushing 300 and the cutter shaft 30 are synchronously rotatable. The bushing 300 is a splined bushing, and the cutter shaft 30 is a splined shaft. The splined bushing and the splined shaft are inserted into each other to constrain their synchronous rotation and allow them to move relative to each other. Figure 3 As shown, the bushing 300 is mounted on the connecting platform 10 using several bearings 120 according to actual assembly requirements.

[0040] like Figure 1 and Figure 2 As shown, the bowl 100 is fixed to the connecting platform 10 using a detachable connection. The detachable connection can be achieved using existing detachable connection structures such as a screw-on structure, a threaded structure, or a magnetic structure. The bowl 100 is not limited to being installed on the connecting platform 10; during use, the bowl 100 can be fixed to any part of the food processing machine, simply by being fixed relative to the connecting platform 10.

[0041] like Figure 2 As shown, the bowl 100 is a cup body with a cooking cavity 101 and an open top. When in use, the connecting platform 10 acts as a lid and can seal the bowl 100 after being connected to it.

[0042] In this invention, the cutter shaft 30 is axially movable relative to the connecting platform 10. For example... Figure 2 As shown, the axial direction of the cutter shaft 30 is vertical, meaning that the cutter shaft is moved vertically relative to the connecting platform 10.

[0043] like Figure 2 and Figure 3 As shown, the first threaded structure 210 is a threaded groove disposed within the mounting space 200. A first embodiment of the second threaded structure 40 includes a connecting nut 410 disposed on the cutter shaft 30, the connecting nut 410 being threadedly connected to the threaded groove. The connecting nut 410 engages with the threaded groove to achieve the following: when the cutter shaft 30 drives the connecting nut 410 to rotate, if there is a speed difference between the cutter shaft 30 and the sleeve 20, that is, the connecting nut 410 rotates and moves relative to the sleeve 20 while simultaneously moving, thereby driving the cutter shaft 30 to move relative to the sleeve 20.

[0044] A second embodiment of the second thread structure 40: The second thread structure 40 is a threaded part provided on the cutter shaft 30, which is threadedly connected to a threaded groove in the mounting space 200. Compared with the first embodiment of the second thread structure 40, this embodiment directly processes the threaded part on the cutter shaft 30, resulting in lower manufacturing costs.

[0045] Furthermore, the cutter shaft 30 is detachably connected to the connecting nut 410. The purpose of this detachable connection is that the cutter shaft 30 can be removed from the sleeve 20 during operation or subsequent maintenance and cleaning.

[0046] like Figure 3 As shown, in one embodiment of the connection between the cutter shaft 30 and the connecting nut 410: the connecting nut 410 is provided with a coupling space 400, and the cutter shaft 30 is provided with a coupling connection part 320, which is movably inserted into the coupling space 400; the connecting nut 410 is provided with a locking structure 401 for constraining the coupling connection part 320 to remain within the coupling space 400. The locking structure 401 serves to lock and prevent disengagement, constraining the connecting nut 410 and the cutter shaft 30 to remain together.

[0047] Furthermore, the coupling space 400 is a keyway, and the coupling connection part 320 is a key shaft. The insertion and mating of the keyway and the key shaft can constrain them to rotate synchronously.

[0048] Example 2 of connecting the cutter shaft 30 and the connecting nut 410: The cutter shaft 30 and the connecting nut 410 are connected by bolts.

[0049] Example 3 of connecting the cutter shaft 30 and the connecting nut 410: The cutter shaft 30 and the connecting nut 410 are connected by a magnetic attraction structure.

[0050] like Figure 3 and Figure 4 As shown, in one embodiment of the locking structure 401: the locking structure 401 includes a locking groove 330 disposed in the coupling connection portion 320; the connecting nut 410 is provided with a channel 420 communicating with the locking groove 330; a locking member 430 movably disposed within the channel 420 and capable of being embedded in the locking groove 330; a retainer 440 is sleeved on the outside of the connecting nut 410; the retainer 440 is movably disposed relative to the connecting nut 410; and the retainer 440 is provided with a retaining rib 450. In this embodiment, when the retainer 440 is in the locked position, the retaining rib 450 abuts against the locking member 430, constraining the locking member 430 to remain within the locking groove 330, thereby constraining the cutter shaft 30 and the connecting nut 410 to be connected together. When the cutter shaft 30 is separated from the connecting nut 410, the drive retainer 440 moves relative to the connecting nut 410, moving the retainer 440 from the locked position to the unlocked position. In this state, the locking member 430 has space to move outward, that is, the locking member 430 has space to disengage from the locking groove 330. At this time, by driving the cutter shaft 30 to move away from the connecting nut 410, the locking member 430 can be squeezed, causing it to disengage from the locking groove 330. At the same time, the cutter shaft 30 drives the coupling connection part 320 to disengage from the coupling space 400, thus completing the disassembly.

[0051] like Figure 3 As shown, the locking member 430 has a spherical structure, and the locking groove 330 has an arc-shaped cross-section. The arc-shaped surface cooperates with the spherical locking member 430, so that when the cutter shaft 30 moves away from the connecting nut 410, the locking groove 330 can better compress the locking member 430, causing the locking member 430 to move away from the locking groove 330.

[0052] like Figure 3 and Figure 4 As shown, the locking structure 401 further includes a first elastic element 460, which applies a force to the retainer 440 to keep it in the locked position, causing the retaining rib 450 to abut against the locking member 430. The first elastic element 460 is a spring. During unlocking, the retainer 440 requires external force to move from top to bottom to the unlocked position. When no external force drives the retainer 440, the first elastic element 460 causes the retainer 440 to reset and move back to the locked position.

[0053] like Figure 3As shown, the connecting nut 410 is provided with a limiting snap ring 470. The function of the limiting snap ring 470 is to abut against the retainer 440, preventing the retainer 440 from separating from the connecting nut 410 due to the force of the first elastic element 460. Furthermore, the retainer 440 has a ring-shaped structure. When the retainer 440 is in the locked position, its upper surface abuts against the limiting snap ring 470. To unlock, the retainer 440 needs to move from top to bottom to the unlocked position.

[0054] like Figure 3 and Figure 4 As shown, the sleeve 20 is movably provided with an unlocking trigger 480, and the unlocking trigger 480 is provided with an unlocking trigger part 481. The unlocking trigger part 481 can abut against the retainer 440 to push the retainer 440 from the locked position to the unlocked position.

[0055] like Figure 4 As shown, the unlocking trigger 480 is connected to the sleeve 20 by a third elastic element 490. The third elastic element 490 keeps the unlocking trigger 480 in the untriggered position, as shown in the image. Figure 4 As shown. When it is necessary to move the retainer 440 from the locked position to the unlocked position, the unlock trigger 480 is manually pressed, causing the unlock trigger 480 to move relative to the sleeve 20, thereby pushing the retainer 440 to move. During this process, the third elastic element 490 is compressed and stores force. When the unlock trigger 480 is released, the third elastic element 490 releases the stored force, causing the unlock trigger 480 to reset.

[0056] like Figure 1 and Figure 10 As shown, one embodiment of the differential module 50 includes a friction resistance element 510 and a drive component 500. The friction resistance element 510 is rotatably or movable relative to the connecting platform 10. When the friction resistance element 510 rotates or moves relative to the connecting platform 10, it gradually comes into contact with or moves away from the sleeve 20. The drive component 500 drives the friction resistance element 510 to rotate or move relative to the connecting platform 10. In this embodiment, the constraint force on the sleeve 20 is the frictional force exerted by the friction resistance element 510 on it. The greater the frictional force, the greater the constraint force on the sleeve 20. The greater the constraint force on the sleeve 20, the slower the rotational speed of the sleeve 20. The greater the speed difference between the two, the faster the movement speed of the cutter shaft relative to the sleeve. In this embodiment, the friction resistance element 510 and the drive component 500 can be set on the connecting platform 10 or in other positions on the food processing machine, depending on the requirements.

[0057] Furthermore, in an embodiment where the friction resistance element 510 is rotatably configured relative to the connecting platform 10, the friction resistance element 510 rotates about the pivot shaft 520. The friction resistance element 510 has a semi-circular structure, which allows the friction resistance element 510 to better fit with the sleeve 20.

[0058] Furthermore, in an embodiment where the friction resistance element 510 is rotatably arranged relative to the connecting platform 10, the driving member 500 includes a rotating member 530, which is hinged to a connecting rod 540. The other end of the connecting rod 540 is hinged to the friction resistance element 510. In this embodiment, as the rotating member 530 rotates, it drives the friction resistance element 510 to rotate about the axis 520 via the connecting rod 540. This causes the friction resistance element 510 to gradually come into contact with or move away from the sleeve 20, thereby changing the frictional force of the friction resistance element 510 on the sleeve 20. In this embodiment, the rotating member 530 can be a damping knob or other existing rotating members.

[0059] Furthermore, in an embodiment where the friction resistance element 510 is rotatably arranged relative to the connecting platform 10, the driving component 500 can be a motor, which drives the friction resistance element 510 to rotate around the shaft 520. The transmission between the two can employ a gear transmission scheme, with a first gear coaxial with the shaft 520 on the friction resistance element 510, and a second gear connected to the motor shaft. The meshing of the first and second gears achieves gear transmission.

[0060] An embodiment of the friction resistance element 510 being movable relative to the connecting platform 10; the friction resistance element 510 is arranged to move linearly relative to the connecting platform 10, the driving component 500 is a linear motor, the telescopic shaft of the linear motor is fixedly connected to the friction resistance element 510, the linear motor drives the friction resistance element 510 to move linearly, so that the friction resistance element 510 gradually comes into contact with the sleeve 20 or gradually moves away from the sleeve 20.

[0061] Embodiment 2 of the differential module 50: The differential module 50 adopts an existing hysteresis brake, and the rotating shaft of the hysteresis brake is connected to the sleeve 20. The hysteresis brake utilizes the principle of hysteresis to generate a certain torque by controlling the input excitation current. It is a torque control component that utilizes the principle of hysteresis. It can generate torque according to the control input excitation current to control the rotational speed of the hysteresis brake shaft, thereby controlling the rotational speed of the sleeve 20.

[0062] like Figure 9As shown, the differential module 50 includes a stator magnetic pole 501 fixedly mounted in the food processing machine, a rotor 502 rotatably mounted inside the stator magnetic pole 501, and a coil disposed inside the stator magnetic pole 501. The sleeve 20 is provided with a connecting part 503 and is fixedly connected to the rotor 502. When the coil is energized, torque is generated by controlling the input excitation current to control the rotational speed of the rotor 502, thereby controlling the rotational speed of the sleeve 20.

[0063] like Figure 2 As shown, the drive module 60 includes a motor 610, the motor shaft 620 of the motor 610 is connected to a drive gear 630, the cutter shaft 30 is driven by a driven gear 640, and the drive gear 630 is driven by the driven gear 640.

[0064] Furthermore, the driven gear 640 is fixedly connected to the bushing 300, the driving gear 630 drives the driven gear 640 to rotate, the driven gear 640 drives the bushing 300 to rotate, and the bushing 300 drives the cutter shaft 30 to rotate.

[0065] like Figure 1 As shown, the connecting platform 10 is provided with a sensing module 70 for sensing the position of the cutter shaft 30; the cutter shaft 30 moves between a first position and a second position relative to the connecting platform 10 along its axial direction; when the cutter shaft 30 is in the second position, the sensing module 70 triggers the sensing.

[0066] like Figure 5 As shown, the sensing module 70 uses a micro switch 710. When the cutter shaft 30 moves axially to the second position, it triggers the sensing end 720 of the micro switch 710. The micro switch 710 feeds back a signal to the control board of the food processing machine, so that the control board can obtain the position information of the cutter shaft 30 and thus control the rotation direction of the drive module 60, that is, control the rotation direction of the motor 610. As the rotation direction of the cutter shaft changes, the movement direction of the cutter shaft also changes with the cooperation of the first thread structure and the second thread structure.

[0067] like Figure 5 As shown, a trigger rod 730 is movably mounted on the connecting platform 10. The trigger rod 730 reciprocates between a sensing position and a disengaged position relative to the connecting platform 10. The connecting platform 10 is provided with a second elastic element 740 for holding the trigger rod 730 in the disengaged position. When the cutter shaft 30 moves axially to the second position, the cutter shaft 30 presses the trigger rod 730, causing the trigger rod 730 to move from the disengaged position to the sensing position, thereby triggering the sensing end 720 of the micro switch 710. When the cutter shaft 30 separates from the trigger rod 730, the second elastic element 740 pushes the trigger rod 730 to move to the disengaged position.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism for a food processing machine, characterized in that, include: Connecting platform (10); A cutter shaft (30) is rotatably disposed relative to the connecting platform (10) and is movable relative to the connecting platform (10) along the axial direction of the cutter shaft (30); A sleeve (20) is provided with an installation space (200) inside the sleeve (200), a first thread structure (210) is provided in the installation space (200), and a second thread structure (40) is provided in the cutter shaft (30). The first thread structure (210) and the second thread structure (40) are threadedly connected. A drive module (60) is connected to the cutter shaft (30) to drive the cutter shaft (30) to rotate relative to the connecting platform (10); When there is a speed difference between the sleeve (20) and the cutter shaft (30), the second thread structure (40) cooperates with the first thread structure (210) to drive the cutter shaft (30) to move along its axial direction.

2. The lifting mechanism of a food processing machine according to claim 1, characterized in that, The sleeve (20) is rotatably disposed relative to the connecting platform (10); Differential module (50) is used to apply a constraint force to the sleeve (20) so that there is a speed difference between the rotational speed of the sleeve (20) and the rotational speed of the cutter shaft (30).

3. The lifting mechanism of a food processing machine according to claim 1, characterized in that, The sleeve (20) is fixedly mounted on the connecting platform (10).

4. The lifting mechanism of a food processing machine according to claim 1, characterized in that, The first threaded structure (210) is a threaded groove provided in the mounting space (200); The second threaded structure (40) includes a connecting nut (410) disposed on the cutter shaft (30), the connecting nut (410) being threadedly connected to the threaded groove.

5. The lifting mechanism of a food processing machine according to claim 4, characterized in that, The cutter shaft (30) is detachably connected to the connecting nut (410).

6. The lifting mechanism of a food processing machine according to claim 5, characterized in that, The connecting nut (410) is provided with a coupling space (400), and the cutter shaft (30) is provided with a coupling connection part (320), which is movably inserted into the coupling space (400); The connecting nut (410) is provided with a locking structure (401) for constraining the coupling connection (320) to remain within the coupling space (400).

7. The lifting mechanism of a food processing machine according to claim 6, characterized in that, The locking structure (401) includes a locking groove (330) provided in the coupling connection part (320), and the connecting nut (410) is provided with a channel (420) communicating with the locking groove (330). A locking member (430) that can be embedded in the locking groove (330) is movably provided in the channel (420). A retainer (440) is sleeved on the outside of the connecting nut (410). The retainer (440) is movable relative to the connecting nut (410). The retainer (440) is provided with retaining ribs (450). The retaining rib (450) abuts against the locking member (430) to restrain the locking member (430) from being held within the locking groove (330).

8. The lifting mechanism of a food processing machine according to claim 7, characterized in that, The locking structure (401) further includes a first elastic element (460) for applying a force to the retainer (440) to keep the retainer (440) in the locked position and to make the retaining rib (450) abut against the locking member (430); The sleeve (20) is movably provided with an unlocking trigger (480), and the unlocking trigger (480) is provided with an unlocking trigger part (481). The unlocking trigger part (481) can abut against the retainer (440) to push the retainer (440) from the locked position to the unlocked position.

9. The lifting mechanism of a food processing machine according to claim 2, characterized in that, The differential module (50) includes a stator magnetic pole (501) fixedly installed in the food processing machine, a rotor (502) rotatably installed inside the stator magnetic pole (501), a coil installed inside the stator magnetic pole (501), and a sleeve (20) having a connecting part (503) fixedly connected to the rotor (502).

10. The lifting mechanism of a food processing machine according to claim 2, characterized in that, The differential module (50) includes a friction resistance element (510) and a drive element (500); The friction resistance element (510) is rotatably or movable relative to the connecting platform (10). When the friction resistance element (510) rotates or moves relative to the connecting platform (10), it gradually comes into contact with the sleeve (20) or gradually moves away from the sleeve (20). The driving component (500) drives the friction resistance element (510) to rotate or move relative to the connecting platform (10).

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