CN220859314U - A multifunctional meat grinder - Google Patents

Abstract

The application discloses a multifunctional meat grinder, which relates to the technical field of meat grinders and comprises a lower machine body, an upper machine body detachably arranged on the lower machine body and a first auxiliary food cup detachably arranged on the upper machine body, wherein the upper machine body comprises a double-head motor, an upper end shaft of the double-head motor can be detachably connected with a first cutter assembly of the first auxiliary food cup, a rotary switching mechanism and a shaft hole are arranged at the bottom of the upper machine body, the lower machine body comprises a meat grinder bowl and a second cutter assembly arranged in the meat grinder bowl, the second cutter assembly can be detachably connected with the lower end shaft of the double-head motor in a plug-in manner through the shaft hole, and the shaft hole can be prevented from being connected with the lower end shaft of the double-head motor by controlling the rotation of a lock catch shifting rod of the rotary switching mechanism. The application can realize the switching between reamer components, and can respectively carry out meat mincing, vegetable mincing or bean mincing operations by using the corresponding reamer components, thereby having multiple functions, high use flexibility, reduced space occupation and convenient use.

Description

A multifunctional meat grinder

Technical Field

The present application relates to the technical field of meat grinders, and in particular to a multifunctional meat grinder.

Background technique

Meat grinders, baby food machines, and bean crushers are all commonly used kitchen appliances. Bean crushers are used to chop beans, grains, etc. into granules or powder; meat grinders are used to chop or mince vegetables or meat; baby food machines are used to grind baby food ingredients into fine pieces, making it easier to make all kinds of baby food. On the one hand, due to the different hardness of the crushed food, the knives used will be different. Although the functions are the same, they will still be made into different kitchen appliances for processing corresponding items according to the usage. On the other hand, in order to avoid contamination of different types of ingredients during use, consumers usually buy multiple crushing devices with the same functions but different usage ranges. When consumers have multiple crushers at the same time, it not only takes up kitchen space, but also increases the cost of use.

Utility Model Content

In view of this, the present application provides a multifunctional meat grinder to solve the above technical problems.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A multifunctional meat grinder comprises a lower body, an upper body detachably mounted on the lower body, and a first auxiliary food cup detachably mounted on the upper body, the upper body comprising a double-headed motor, the upper end shaft of the double-headed motor being detachably connected to a first reamer assembly of the first auxiliary food cup, a rotation switching mechanism and an axis hole being provided at the bottom of the upper body, the lower body comprising a meat grinder bowl and a second reamer assembly arranged in the meat grinder bowl, the second reamer assembly being detachably plug-connected to the lower end shaft of the double-headed motor through the axis hole, and the axis hole can be closed by controlling the rotation of a lock lever of the rotation switching mechanism to prevent the second reamer assembly from being connected to the lower end shaft of the double-headed motor.

Furthermore, the second reamer assembly includes a detachably connected lower reamer assembly and an upper reamer assembly, the lower reamer assembly is rotatably connected to the meat grinder bowl, the upper reamer assembly can be detachably plugged into a connecting assembly connected to the lower end shaft of the double-headed motor, the lower reamer assembly can also be detachably connected to a second supplementary food cup, and when the lower reamer assembly is connected to the second supplementary food cup, the upper reamer assembly can be rotatably arranged in the second supplementary food cup.

Furthermore, the upper reamer assembly includes a first rod and a second rod that are slidably connected, an elastic member is provided between the first rod and the second rod, the second rod is connected to the lower reamer assembly or the second supplementary food cup, and the first rod can be detachably plug-connected to the connecting assembly.

Furthermore, the upper body also includes an upper body box, the double-headed motor is installed in the upper body box, a flip-up top cover is provided at the upper opening of the upper body box, and a locking mechanism is also provided on the upper body box. After the top cover is buckled on the upper body box, it is locked by the locking mechanism to cover the upper end shaft of the double-headed motor.

Furthermore, the locking mechanism includes a movable plate rotatably arranged on one side surface of the upper body box, a locking protrusion is provided on the movable plate, a convex plate is provided on the top cover, a convex plate is provided on the convex plate, a convex tooth engaged with the locking protrusion is provided on the convex plate, and a first torsion spring is provided between the movable plate and the upper body box to swing the locking protrusion toward the convex tooth.

Furthermore, the bottom of the upper body box has a tailstock, the shaft hole is arranged on the tailstock, and the rotation switching mechanism includes a locking lever rotatably arranged on the outer periphery of the shaft hole, and the opening and closing of the shaft hole is controlled by the rotation of the locking lever.

Furthermore, the rotation switching mechanism also includes a second torsion spring for automatically rotating and resetting the lock lever to open the shaft hole, and a locking mechanism for preventing the lock lever from rotating.

Furthermore, the locking mechanism includes a telescopic rod slidably arranged in the upper body box and a compression spring acting on the telescopic rod to move the telescopic rod upward. The telescopic rod is squeezed downward by the first supplementary food cup or the top cover. After moving downward, the telescopic rod locks the position of the locking lever so that the shaft hole can remain in an open or closed state.

Furthermore, the lock lever includes a connecting part, a shielding part and a toggle part which are sequentially connected to form an integral whole and distributed along a circular arc. The connecting part is rotatably connected to the tailstock. By toggling the toggle part, the shielding part can be rotated to the shaft hole to close the shaft hole.

Furthermore, a top block is provided on the top cover, a retaining groove is provided on the lock lever, and the telescopic rod is inserted into the retaining groove to lock the lock lever, so that the shaft hole remains in a closed state.

It can be seen from the above technical solution that the advantages of the utility model are:

1. The present application is provided with an upper body box, a double-headed motor, a first reamer assembly, a first food supplement cup, a meat grinder bowl, a second reamer assembly, a connecting assembly and a rotating switching mechanism. The meat grinder bowl is connected with the upper body box by snapping. An axial hole is provided at the bottom of the upper body box. The axial hole is opened or closed by controlling the rotating switching mechanism to insert or detach the second reamer assembly from the connecting assembly. The two ends of the double-headed motor can be connected to the corresponding reamer assembly at the same time according to the needs to increase the crushing efficiency, or any one end of the double-headed motor can be connected to the corresponding reamer assembly to increase the power during the crushing process.

2. The second reamer assembly adopts a splicing structure, so that the lower reamer assembly can be used in combination with the second supplementary food cup. Through the cooperation of the meat grinder bowl and the reamer assembly, the cooperation of the first supplementary food cup and the reamer assembly, and the cooperation of the second supplementary food cup and the reamer assembly, it is possible to realize the separate operations of mincing meat, chopping vegetables, and chopping beans to avoid mutual contamination, so that the meat grinder has multiple functions, high flexibility in use, reduces space occupancy, and is easy to use.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of the present application are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

FIG1 is an exploded view of the present application.

FIG. 2 is an exploded view of the lower body of the present application.

FIG. 3 is an exploded view of the upper body of the present application.

FIG. 4 is one of the structural schematic diagrams of the locking mechanism of the present application.

FIG. 5 is a second schematic structural diagram of the locking mechanism of the present application.

FIG. 6 is a schematic structural diagram of the locking mechanism of the present application.

FIG. 7 is a partial enlarged schematic diagram of point A in FIG. 6 .

FIG. 8 is a schematic diagram of the motion state of the rotary switching mechanism of the present application.

FIG. 9 is one of the structural schematic diagrams of the tailstock of the present application.

FIG. 10 is a second schematic structural diagram of the tailstock of the present application.

FIG. 11 is a partial enlarged view of point B in FIG. 10 .

FIG. 12 is a schematic structural diagram of the lock lever of the present application.

FIG. 13 is a top view of the lower body of the present application.

Description of the accompanying drawings: lower body 1, meat grinder bowl 11, lower reamer assembly 111, second supplementary food cup 2, second reamer assembly 22, upper body 3, upper body box 31, tail stock 311, shaft hole 312, upper cover 32, top cover 33, convex plate 331, convex tooth 332, top block 333, first reamer assembly 34, lock lever 35, blocking groove 351, avoidance groove 352, connecting seat 36, fixing groove 361, second torsion spring 37, pin 38, first supplementary food cup 4, threaded connection part 41, locking mechanism 5, movable plate 51, locking convex 511, first torsion spring 52, connecting assembly 6, telescopic rod 7, compression spring 71.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the implementation modes and the accompanying drawings. Here, the illustrative implementation modes and descriptions of the present application are used to explain the present application, but are not intended to limit the present application.

It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

In addition, the terms “first” and “second” are merely used for distinction in description and have no special meanings.

1 to 13, as shown in FIG1, the present embodiment provides a multifunctional meat grinder, comprising: a lower body 1, an upper body 3 detachably mounted on the lower body 1, and a first supplementary food cup 4 detachably mounted on the upper body 3, the upper body 3 comprising a double-headed motor, the upper end shaft of the double-headed motor being detachably connected to a first reamer assembly 34 arranged in the first supplementary food cup 4, the lower body 1 comprising a meat grinder bowl 11 and a second reamer assembly 22 arranged in the meat grinder bowl 11, referring to FIG13, the second reamer assembly 22 is detachably plug-connected to a connecting assembly 6 arranged on the lower end shaft of the double-headed motor, a rotation switching mechanism and an axial hole 312 for accommodating the connecting assembly 6 are provided at the bottom of the upper body 3, and the axial hole 312 can be closed by controlling the lock lever 35 of the rotation switching mechanism to rotate to prevent the second reamer assembly 22 from being connected to the connecting assembly 6.

Specifically, the first reamer assembly 34 is connected to the upper end shaft of the double-headed motor, and the first reamer assembly 34 can be driven to rotate by the double-headed motor. The first supplementary food cup 4 can contain supplementary food raw materials and be minced by the first reamer assembly 34; the second reamer assembly 22 is connected to the lower end shaft of the double-headed motor through the connecting assembly 6, and the second reamer assembly 22 can be driven to rotate by the double-headed motor to realize minced meat, minced vegetables or minced beans. The rotary switching mechanism is used to block or open the shaft hole 312. The connecting assembly 6 includes a sleeve connected to the lower end of the double-headed motor. When the shaft hole 312 is blocked, the second reamer assembly 22 and the connecting assembly 6 are blocked by the rotary switching mechanism, and the second reamer assembly 22 is separated from the connecting assembly 6. At this time, the double-headed motor can only control the first reamer assembly 34 to work; when the shaft hole 312 is opened, the second reamer assembly 22 can be plugged and connected with the sleeve. The double-headed motor can both drive the first reamer assembly 34 to work and control the second reamer assembly 22 to work, which can be adjusted according to actual usage requirements.

In one embodiment, please refer to Figure 2, the second reamer assembly 22 includes a detachably connected lower reamer assembly 111 and an upper reamer assembly, the lower reamer assembly is rotatably connected to the minced meat bowl 11, and the upper reamer assembly is detachably plug-connected to the connecting assembly 6, the lower reamer assembly 111 can also be detachably connected to the second supplementary food cup 2 set in the minced meat bowl 11, and when the lower reamer assembly 111 is connected to the second supplementary food cup 2, the upper reamer assembly can be rotatably set in the second supplementary food cup 2.

Specifically, the lower reamer assembly 111 and the upper reamer assembly are used to mince the food in the meat mincer 11 when used in combination; the lower reamer assembly 111, the second supplementary food cup 2, and the upper reamer assembly are used to mince the food in the second supplementary food cup 2 when used in combination; different types or amounts of food ingredients can be processed, and the use function is more comprehensive; the lower reamer assembly 111 and the upper reamer assembly are detachable, which is not only convenient for disassembly and assembly for combined use, but also easy to clean.

In one embodiment, the upper reamer assembly includes a first rod body and a second rod body that are slidably connected, an elastic member is provided between the first rod body and the second rod body, the second rod body is connected to the lower reamer assembly 111 or the second supplementary food cup 2, and the first rod body is moved up by the elastic member to be detachably plug-connected with the connecting assembly 6. The elastic member can be configured as a compression spring or an elastic rubber ring. When the shaft hole 312 is opened, the first rod body is automatically moved up and plug-connected with the connecting assembly 6 under the action of the elastic member, thereby improving the convenience of use.

Specifically, the first reamer assembly 34 , the lower reamer assembly 111 and the upper reamer assembly all include a rotating shaft and a plurality of blades arranged on the rotating shaft. When the lower reamer assembly 111 and the upper reamer assembly are connected, they are plug-connected and rotate synchronously. The upper reamer assembly is rotationally connected to the second supplementary food cup 2 .

In one embodiment, please refer to Figure 3, the upper body 3 also includes an upper body box 31, the double-headed motor is installed in the upper body box 31, and a reversible top cover 33 is provided at the upper end opening of the upper body box 31. Please refer to Figure 4, the upper body box 31 is also provided with a locking mechanism 5, and the top cover 33 is buckled on the upper body box 31 and locked by the locking mechanism 5 to cover the upper end shaft of the double-headed motor.

Specifically, please refer to Figure 3. A threaded connection portion 41 is provided on the first supplementary food cup 4, and the threaded connection portion 41 is threadedly matched with a threaded segment provided on the upper body box 31. The threaded connection ensures the stability of the installation of the first supplementary food cup 4, and facilitates the disassembly and assembly of the first supplementary food cup 4. By providing a top cover 33, when not in use, the top cover 33 is buckled on the top cover 33 to play a dust-proof role.

In one embodiment, please refer to Figures 3 and 5, the locking mechanism 5 includes a movable plate 51 rotatably arranged on one side surface of the upper body box 31, the movable plate 51 is provided with a locking protrusion 511, the top cover 33 is provided with a convex plate 331, the convex plate 331 is provided with a convex tooth 332 engaged with the locking protrusion 511, and a first torsion spring 52 is provided between the movable plate 51 and the upper body box 31 to swing the locking protrusion 511 toward the convex tooth 332.

Specifically, please refer to Figure 5. The upper end of the locking protrusion 511 is provided with an upper guiding inclined surface, and the lower end of the convex tooth 332 is provided with a lower guiding inclined surface. When a locking connection is required, the top cover 33 is pressed, and the top cover 33 drives the convex plate 331 and the convex tooth 332 to move downward, and the lower guiding inclined surface presses against the upper guiding inclined surface and moves along the upper guiding inclined surface, and finally the convex tooth 332 slides to the bottom of the locking protrusion 511. Under the action of the first torsion spring 52, the locking protrusion 511 swings toward the convex tooth 332, so that the locking protrusion 511 is engaged with the convex tooth 332. When the top cover 33 needs to be opened, the lower end of the movable plate 51 is pressed, the first torsion spring 52 is squeezed, the upper end of the movable plate 51 swings and drives the locking protrusion 511 to disengage from the convex tooth 332, and the top cover 33 can be opened, which is easy to operate.

In one embodiment, please refer to Figures 8 to 11, the bottom of the upper body box 31 has a tail stock 311, the shaft hole 312 is arranged on the tail stock 311, the rotation switching mechanism includes a lock lever 35 rotatably arranged on the outer periphery of the shaft hole 312, and the opening and closing of the shaft hole 312 is controlled by the rotation of the lock lever 35. The rotation switching mechanism also includes a second torsion spring 37 for automatically rotating and resetting the lock lever 35 to open the shaft hole 312, and a locking mechanism for preventing the lock lever 35 from rotating.

Specifically, a connecting seat 36 is provided on the outer surface of the shaft hole 312, a pin shaft 38 is provided on the connecting seat 36, one end of the lock lever 35 is provided with a sleeve that rotates with the pin shaft 38, and a second torsion spring 37 is provided between the lock lever 35 and the connecting seat 36 to enable the lock lever 35 to rotate and close the shaft hole 312.

In one embodiment, please refer to Figures 6 and 7, the locking mechanism includes a telescopic rod 7 slidably arranged in the upper body box 31 and a compression spring 71 acting on the telescopic rod 7 to move the telescopic rod 7 upward. The telescopic rod 7 is squeezed downward by the first supplementary food cup 4 or the top cover 33. After moving downward, the telescopic rod 7 locks the position of the lock lever 35 so that the shaft hole 312 can remain in an open or closed state.

Please refer to Figure 12, the lock lever 35 includes a connecting part, a shielding part and a toggle part which are sequentially connected to form an integral whole and distributed along a circular arc, the connecting part is rotatably connected to the tail stock 311, and the shielding part can be moved to the shaft hole 312 by toggling the toggle part to close the shaft hole 312, wherein an avoidance groove 352 for avoiding the shaft hole 312 is provided on the lock lever 35.

The top cover 33 is provided with a top block 333 , the lock lever 35 is provided with a retaining groove 351 , and the telescopic rod 7 is inserted into the retaining groove 351 to lock the lock lever 35 , so that the shaft hole 312 remains in a closed state.

Please refer to Figures 10 and 11. A fixing groove 361 is provided on the connecting seat 36, a part of the second torsion spring 37 is sleeved on the pin shaft 38, and the other part of the second torsion spring 37 is located in the shaft sleeve. One end of the second torsion spring 37 is installed in the fixing groove 361, and a receiving groove is provided on the lock lever 35, and the other end of the second torsion spring 37 is confined in the receiving groove.

In the first state of use of the present application, only the first supplementary food cup 4 can be used for crushing. In the initial state, the locking lever 35 is manually moved to rotate the shielding portion to the shaft hole 312 to block the shaft hole 312, and then the first supplementary food cup 4 is connected to the upper body 3. The telescopic rod 7 is squeezed by the first supplementary food cup 4 to insert the telescopic rod 7 into the retaining groove 351 to lock the locking lever 35, so that the shaft hole 312 remains in a closed state. Finally, the double-headed motor of the upper body 3 is controlled to start or stop by operating the button on the upper body 3. In order to raise the height of the first supplementary food cup 4 and facilitate observation of the crushing condition in the first supplementary food cup 4, the upper body 3 can also be placed on the minced meat bowl 11 for use.

In the second state of use of the present application, only the meat grinder bowl 11 is used for crushing. In the initial state, the telescopic rod 7 is separated from the lock lever 35 under the action of the compression spring 71, and the lock lever 35 is rotated under the action of the second torsion spring 37 to open the shaft hole 312. For safety in use, the top cover 33 is closed, and the telescopic rod 7 is located on the outside of the lock lever 35 to prevent the lock lever 35 from rotating. The shaft hole 312 remains open, and the upper body 3 is installed on the meat grinder bowl 11, so that the upper reamer assembly of the second reamer assembly 22 located in the meat grinder bowl 11 is plugged and connected with the connecting assembly 6, and finally the double-headed motor of the upper body 3 is controlled to work or stop by operating the button located on the upper body 3.

In the third state when the present application is used, only the second auxiliary food cup 2 is used for crushing. In the initial state, the telescopic rod 7 is separated from the lock lever 35 under the action of the compression spring 71, and the lock lever 35 is rotated under the action of the second torsion spring 37 to open the shaft hole 312. For safety in use, the top cover 33 is closed, and the telescopic rod 7 is located on the outside of the lock lever 35 to prevent the lock lever 35 from rotating. The shaft hole 312 remains open, and then the upper reamer assembly of the second reamer assembly 22 is removed, and the second auxiliary food cup 2 is placed in the minced meat bowl 11. The second auxiliary food cup 2 is located above or at the bottom of the lower reamer assembly 111 and is plugged and connected to the knife shaft of the lower reamer assembly 111. Then the upper reamer assembly is installed in the second auxiliary food cup 2, and then the upper body 3 is installed on the minced meat bowl 11, so that the upper reamer assembly in the second auxiliary food cup 2 is plugged and connected to the connecting assembly 6, and finally the double-headed motor of the upper body 3 is controlled to work or stop by operating the button on the upper body 3.

In the fourth state when the present application is used, the first food supplement cup 4 and the meat grinder 11 are crushed simultaneously. In the initial state, the first food supplement cup 4 is separated from the upper body 3, and the telescopic rod 7 is separated from the locking lever 35 under the action of the compression spring 71. The locking lever 35 rotates under the action of the second torsion spring 37 to open the shaft hole 312, and then the first food supplement cup 4 is installed. The telescopic rod 7 pressed down by the first food supplement cup 4 is located on the outside of the locking lever 35 to prevent the locking lever 35 from rotating. The shaft hole 312 remains open, and the upper body 3 is installed on the meat grinder 11, so that the upper reamer assembly of the second reamer assembly 22 located in the meat grinder 11 is plugged and connected with the connecting assembly 6. Finally, the double-headed motor of the upper body 3 is controlled to work or stop by operating the button located on the upper body 3, so as to realize the simultaneous crushing of the first food supplement cup 4 and the meat grinder 11.

In the fifth state when the present application is used, the first auxiliary food cup 4, the upper body 3 and the second auxiliary food cup 2 are used in combination. In the initial state, the first auxiliary food cup 4 is separated from the upper body 3, and the telescopic rod 7 is separated from the locking lever 35 under the action of the compression spring 71. The locking lever 35 rotates under the action of the second torsion spring 37 to open the shaft hole 312, and then the first auxiliary food cup 4 is installed. The telescopic rod 7 pressed down by the first auxiliary food cup 4 is located on the outside of the locking lever 35 to prevent the locking lever 35 from rotating, and the shaft hole 312 remains open. Then, the upper of the second reamer assembly 22 is closed. The reamer assembly is removed, and the second supplementary food cup 2 is placed in the minced meat bowl 11, the second supplementary food cup 2 is located above or at the bottom of the lower reamer assembly 111 and is plugged and connected to the knife shaft of the lower reamer assembly 111, and then the upper reamer assembly is installed in the second supplementary food cup 2, and then the upper body 3 with the first supplementary food cup 4 is installed on the minced meat bowl 11, so that the upper reamer assembly located in the second supplementary food cup 2 is plugged and connected to the connecting assembly 6, and finally the double-headed motor of the upper body 3 is controlled to work or stop by operating the button located on the upper body 3.

The fourth and fifth states of the present application are as follows: in the initial state, the locking lever 35 can also be manually moved to rotate the shielding portion 312 to block the shaft hole 312, and then the first auxiliary food cup 4 is connected to the upper body 3, and the telescopic rod 7 is squeezed by the first auxiliary food cup 4 to insert the telescopic rod 7 into the retaining groove 351 to lock the locking lever 35, so that the shaft hole 312 remains in the closed state, and then the upper body 3 is placed in the mincing bowl 11, but the upper reamer assembly is separated from the connecting assembly 6 by the locking lever 35, and the double-headed motor only crushes the food in the first auxiliary food cup 4 when working; when it is necessary to When the ingredients in the first supplementary food cup 4 and the minced meat bowl 11/the second supplementary food cup 2 are to be crushed, the first supplementary food cup 4 is first removed, and the telescopic rod 7 is separated from the locking lever 35 under the action of the compression spring 71, and the locking lever 35 is rotated under the action of the second torsion spring 37 to open the shaft hole 312, and the upper reamer assembly will pass through the shaft hole 312 and be detachably connected to the connecting assembly 6, and then the first supplementary food cup 4 is reinstalled, and the telescopic rod 7 pressed down by the first supplementary food cup 4 is located on the outside of the locking lever 35 to prevent the locking lever 35 from rotating, and the shaft hole 312 remains open, and when the double-headed motor is working, it drives the first reamer assembly 34 and the second reamer assembly 22 to work simultaneously.

The meat grinder can be used to grind complementary food ingredients through the cooperation of a double-headed motor, a first complementary food cup 4 and a first reamer assembly 34, so as to facilitate making various complementary foods for babies; it can be used to grind meat or vegetables through the cooperation of a double-headed motor, a second complementary food cup 2 and a lower reamer assembly 111; it can be used to grind beans through the cooperation of a double-headed motor, a meat grinder bowl 11 and an upper reamer assembly. The purpose of the above-mentioned reamer assemblies can be adjusted according to usage habits. It has comprehensive functions, reduces space occupancy, and is easy to use.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the embodiments of the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A multifunctional meat grinder, characterized in that it comprises a lower body (1), an upper body (3) detachably mounted on the lower body (1), and a first auxiliary food cup (4) detachably mounted on the upper body (3), the upper body (3) comprising a double-headed motor, the upper end shaft of the double-headed motor being detachably connected to a first reamer assembly (34) of the first auxiliary food cup (4), a rotation switching mechanism and an axial hole (312) being provided at the bottom of the upper body (3), the lower body (1) comprising a meat grinder bowl (11) and a second reamer assembly (22) arranged in the meat grinder bowl (11), the second reamer assembly (22) being detachably plug-connected to the lower end shaft of the double-headed motor through the axial hole (312), and the shaft hole (312) being closed by controlling the locking lever (35) of the rotation switching mechanism to rotate to prevent the second reamer assembly (22) from being connected to the lower end shaft of the double-headed motor. 2. The multifunctional meat grinder according to claim 1 is characterized in that the second reamer assembly (22) comprises a detachably connected lower reamer assembly (111) and an upper reamer assembly, the lower reamer assembly being rotatably connected to the meat grinder bowl (11), the upper reamer assembly being separably plug-connected to a connecting assembly (6) connected to the lower end shaft of the double-headed motor, the lower reamer assembly (111) also being detachably connected to a second supplementary food cup (2), and when the lower reamer assembly (111) is connected to the second supplementary food cup (2), the upper reamer assembly being rotatably arranged in the second supplementary food cup (2). 3. The multifunctional meat grinder according to claim 2 is characterized in that the upper reamer assembly comprises a first rod body and a second rod body which are slidably connected, an elastic member is provided between the first rod body and the second rod body, the second rod body is connected to the lower reamer assembly (111) or the second supplementary food cup (2), and the first rod body can be detachably plug-connected to the connecting assembly (6). 4. The multifunctional meat grinder according to claim 2 is characterized in that the upper body (3) also includes an upper body box (31), the double-headed motor is installed in the upper body box (31), a reversible top cover (33) is provided at the upper end opening of the upper body box (31), and a locking mechanism (5) is also provided on the upper body box (31), and the top cover (33) is buckled on the upper body box (31) and locked by the locking mechanism (5) to cover the upper end shaft of the double-headed motor. 5. The multifunctional meat grinder according to claim 4 is characterized in that the locking mechanism (5) includes a movable plate (51) rotatably arranged on a side surface of the upper body box (31), the movable plate (51) is provided with a locking protrusion (511), the top cover (33) is provided with a convex plate (331), the convex plate (331) is provided with a convex tooth (332) engaged with the locking protrusion (511), and a first torsion spring (52) is provided between the movable plate (51) and the upper body box (31) to make the locking protrusion (511) swing toward the convex tooth (332). 6. The multifunctional meat grinder according to claim 4, characterized in that the bottom of the upper body box (31) has a tailstock (311), and the shaft hole (312) is arranged on the tailstock (311). 7. The multifunctional meat grinder according to claim 6 is characterized in that the rotation switching mechanism also includes a second torsion spring (37) for automatically rotating and resetting the lock lever (35) to open the shaft hole (312) and a locking mechanism for preventing the lock lever (35) from rotating. 8. The multifunctional meat grinder according to claim 7 is characterized in that the locking mechanism comprises a telescopic rod (7) slidably arranged in the upper body box (31) and a compression spring (71) acting on the telescopic rod (7) to move the telescopic rod (7) upward, the telescopic rod (7) is squeezed downward by the first supplementary food cup (4) or the top cover (33), and the telescopic rod (7) after moving downward locks the position of the locking lever (35) so that the shaft hole (312) can remain in an open or closed state. 9. The multifunctional meat grinder according to claim 7 is characterized in that the locking lever (35) comprises a connecting portion, a shielding portion and a toggle portion which are sequentially connected to form an integral whole and distributed along a circular arc, the connecting portion is rotatably connected to the tail stock (311), and the shielding portion can be rotated to the shaft hole (312) by toggling the toggle portion to close the shaft hole (312). 10. The multifunctional meat grinder according to claim 8, characterized in that a top block (333) is provided on the top cover (33), a retaining groove (351) is provided on the locking lever (35), and the telescopic rod (7) locks the locking lever (35) by inserting into the retaining groove (351), so that the shaft hole (312) remains in a closed state.