Mixing machine with protective structure

Abstract

The utility model discloses a mixing machine with a protective structure, which relates to the technical field of mixing machines and comprises a mixing machine main body and the protective structure. When the mixing machine main body works, granular raw materials are put in from the feeding hole in the mixing machine main body, mixed and then led out from the discharging hole, the granular raw materials mixed with dust enter the protection structure from the discharging hole at the moment, and the raw materials pass through the anti-blocking component at first and then are discharged from the discharging hole. The anti-blocking part can control the discharging speed of raw materials, then discharging is conducted through the filter screen, when the raw materials pass through the filter screen, granular raw materials can be separated from dust, the dust can be treated by the dust treatment part, and when the dust treatment part works, the vibration part can also act at the same time to enable the filter screen to be in a vibration state; the raw materials and the dust can be better separated, so that the probability of dust overflow is reduced, and the mixing efficiency of the mixer main body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mixing machine technical field, concretely relates to mixing machine with protection structure. BACKGROUND

[0002] Mixing machine is an important industrial equipment, it passes through utilizing mechanical force and gravity etc. principle, two or two or more above material carries out even mixing, has advanced structure, mixing speed is fast, energy -conserving effect is remarkable, and the small and high mixing quality etc. characteristics to material wear, is widely used in chemical industry, pharmacy, food, metallurgy, environmental protection etc. many fields, is realizes material even mixing, improves product quality and production efficiency's key equipment.

[0003] When mixing granular raw material, these particles will experience stirring, impact and friction and other mechanical movements in the mixing machine, the action of these forces will cause the surface of the particles to be damaged, and then release small particles. These small particles will be suspended in the air to form dust. When the mixing process is finished and the material needs to be discharged, not only the mixed raw material will be discharged from the mixing machine, but also the dust in the air will be taken out with the raw material and dispersed into the air outside the mixing machine. Because the dust particles are small, they are easy to be inhaled into the human body, not only threatening the health of the workers, but also polluting the air. At the same time, the existence of dust will also adhere to the mixing machine, so that the mixing efficiency is not high. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing mixing machine with protection structure to solve the problems in the above background technology.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] Mixing machine with protection structure, comprising:

[0007] Mixing machine main body, the lower part of one end of the mixing machine main body is provided with a protection structure;

[0008] Protection structure, the protection structure is located below the mixing tank, and the protection structure is used for treating dust;

[0009] The protection structure comprises:

[0010] Shell, the shell is arranged in Z shape, one side of the shell is fixedly connected with a motor, an inlet and an outlet are formed in the shell respectively, a filter screen is arranged in the shell, the filter screen is located below the inlet, and the filter screen is rotatably connected with the shell;

[0011] Dust treatment component, the dust treatment component is located outside the shell, and the dust treatment component is used for treating dust;

[0012] The anti-blocking component is located above the filter screen and is used to prevent the inside of the shell from being blocked due to too fast feeding of the raw materials;

[0013] The vibrating component is located below the filter screen and is used to make the filter screen vibrate.

[0014] The main body of the mixer is composed of a support, a motor, a speed reducer, a mixing tank and a stirring rod, etc., which are mature technologies in the field of mixers and thus will not be described in detail herein. When the main body of the mixer is working, the granular raw materials are fed into the main body of the mixer from the feeding port and then discharged from the discharging port after mixing. At this time, the granular raw materials will be mixed with dust and enter the protective structure from the discharging port. At this time, the raw materials will first pass through the anti-blocking component, which can control the feeding speed of the raw materials, and then be fed through the filter screen. When passing through the filter screen, the granular raw materials will be separated from the dust, which will be treated by the dust treatment component. When the dust treatment component is working, the vibrating component will also act to make the filter screen vibrate, so that the raw materials and the dust can be better separated, thereby reducing the probability of dust overflow and improving the mixing efficiency of the main body of the mixer.

[0015] The further improvement of the technical scheme of the utility model lies in that: the anti-blocking component comprises a rotating shaft, the rotating shaft is rotationally connected with the shell, one end of the rotating shaft is fixedly connected with the output end of the motor, a rotating roller is fixedly connected on the rotating shaft, a plurality of grooves are formed on the rotating roller in the circumferential direction, and a plurality of matching blocks are symmetrically arranged in the shell.

[0016] By adopting the above technical scheme, when the raw materials enter the shell from the discharging port of the main body of the mixer and the feeding port formed on the shell, the raw materials will fall into the grooves on the rotating roller. The controller controls the motor to start, the motor drives the rotating shaft fixedly connected with the output end to rotate, thereby driving the rotating roller to rotate, the rotation of the rotating roller makes the grooves rotate, thereby conveying the raw materials from above the rotating roller to below the rotating roller, so as to control the falling speed of the raw materials and prevent the raw materials from being blocked.

[0017] The further improvement of the technical scheme of the utility model lies in that: the dust treatment component comprises a cylinder, a piston plate is slidably connected in the cylinder, a piston rod is fixedly connected on one side of the piston plate, the piston rod is slidably connected with the cylinder, a pressing plate is fixedly connected on the end of the piston rod away from the piston plate, a pressure spring is fixedly connected on the side of the piston plate close to the piston rod, the other end of the pressure spring is fixedly connected with the cylinder, a cam is fixedly connected on the end of the rotating shaft away from the motor, the cam is used in cooperation with the pressing plate, and an air inlet and an air outlet are respectively formed on the cylinder.

[0018] Adopting the technical scheme, when the raw materials pass through the filter screen through the rotating roller, the raw materials fall to the discharge port of the shell through the inclined filter screen, meanwhile, the motor drives the rotating shaft fixedly connected with the output end to rotate, the rotating shaft drives the cam fixedly connected therewith to rotate, the cam drives the pressing plate to move downward, the pressure spring is in the elongation state, the pressing plate drives the piston rod and the piston plate fixedly connected therewith to move downward, air in the cylinder is squeezed to be discharged into water through the one-way valve, the air outlet and the discharge pipe, then the cam is disengaged from the pressing plate, the pressing plate is reset upward under the action of the pressure spring, the piston plate moves upward under the action of the pressing plate and the piston rod, air in the shell with dust is sucked in through the one-way valve and the air inlet, so that the dust mixed with the raw materials in the shell is treated.

[0019] Further improvement of the technical scheme of the utility model lies in: the vibration component includes a transmission shaft, the transmission shaft is symmetrically arranged and rotationally connected with the shell, one end of the transmission shaft is fixedly connected with a gear, a part of the end of the transmission shaft away from the gear is provided with a thread, the shell is symmetrically arranged and slidingly connected with a moving block, the moving block is threadedly connected with the transmission shaft, an arc surface is arranged on the moving block, the pressing plate is symmetrically arranged and fixedly connected with an extension rod, one end of the extension rod away from the pressing plate is fixedly connected with a rack, the rack is engaged with the gear.

[0020] Further improvement of the technical scheme of the utility model lies in: the vibration component includes a transmission shaft, the transmission shaft is symmetrically arranged and rotationally connected with the shell, one end of the transmission shaft is fixedly connected with a gear, a part of the end of the transmission shaft away from the gear is provided with a thread, the shell is symmetrically arranged and slidingly connected with a moving block, the moving block is threadedly connected with the transmission shaft, an arc surface is arranged on the moving block, the pressing plate is symmetrically arranged and fixedly connected with an extension rod, one end of the extension rod away from the pressing plate is fixedly connected with a rack, the rack is engaged with the gear.

[0021] Further improvement of the technical scheme of the utility model lies in: the shell is symmetrically arranged and fixedly connected with a guiding block above the cooperation block, the guiding block is triangularly arranged and fixedly connected with the cooperation block.

[0022] Further improvement of the technical scheme of the utility model lies in: the shell is symmetrically arranged and fixedly connected with a guiding block above the cooperation block, the guiding block is triangularly arranged and fixedly connected with the cooperation block.

[0023] Further improvement of the technical scheme of the utility model lies in: the shell is symmetrically arranged and fixedly connected with a guiding block above the cooperation block, the guiding block is triangularly arranged and fixedly connected with the cooperation block.

[0024] According to the technical scheme, when the rack and the gear are engaged with each other, the gear and the rack can be prevented from being disengaged due to movement overload, so that the device can normally work.

[0025] Further improvement of the technical scheme of the utility model lies in that the moving block is provided with a weight-reducing groove.

[0026] According to the technical scheme, the weight-reducing groove can reduce the weight of the moving block, so as to reduce the load of the motor and reduce the consumption of energy.

[0027] According to the technical scheme, the utility model has the following technical progress compared with the prior art:

[0028] 1. The mixing machine with the protection structure comprises a support, a motor, a speed reducer, a mixing tank and a stirring rod, and the mixing machine body is composed of the support, the motor, the speed reducer, the mixing tank and the stirring rod, etc.

[0029] 2. The mixing machine with the protection structure is provided, when the raw materials enter the shell through the feed inlet formed in the shell and the discharge outlet of the mixing machine body, the raw materials fall into the grooves on the rotating roller, the controller controls the motor to start, the motor drives the rotating shaft fixedly connected with the output end to rotate, thereby driving the rotating roller to rotate, the rotation of the rotating roller drives the grooves to rotate, thereby conveying the raw materials from above the rotating roller to below the rotating roller, thereby controlling the falling speed of the raw materials and preventing the raw materials from being blocked.

[0030] 3. The mixing machine with a protection structure, when the raw materials pass through the filter screen, the raw materials will roll down to the discharge port of the shell through the inclined filter screen, simultaneously, the motor is started to drive the rotating shaft fixedly connected with the output end to rotate, the rotating shaft rotating drives the cam fixedly connected therewith to rotate, the cam rotating extrudes the pressing plate to make the pressing plate move downward, the pressure spring is in the elongation state, the pressing plate moving downward drives the piston rod and the piston plate fixedly connected therewith to move downward, air in the cylinder body is extruded to be discharged into water through the one-way valve, the air outlet and the discharge pipe, then the cam rotates and is separated from the pressing plate, at this time the pressing plate is reset upward under the action of the pressure spring, at this time the piston plate moves upward under the action of the pressing plate and the piston rod, so that the air in the shell with dust is sucked in through the one-way valve and the air inlet, thereby achieving the purpose of treating the dust mixed with the raw materials in the shell. BRIEF DESCRIPTION OF DRAWINGS

[0031] The utility model makes further detailed instructions in combination with the following drawings.

[0032] Figure 1 It is first structure schematic diagram of the utility model;

[0033] Figure 2 It is second structure schematic diagram of the utility model;

[0034] Figure 3 It is protection structure structure schematic diagram of the utility model;

[0035] Figure 4 It is first cross section structure schematic diagram of the protection structure of the utility model;

[0036] Figure 5 It is second cross section structure schematic diagram of the protection structure of the utility model;

[0037] In the drawing: 1, mixing machine main body;2, shell;3, motor;4, feed inlet;5, discharge port;6, filter screen;7, rotating shaft;8, rotating roller;9, recess;10, matching block;11, cylinder body;12, piston plate;13, piston rod;14, pressing plate;15, pressure spring;16, cam;17, transmission shaft;18, gear;19, moving block;20, camber;21, extension rod;22, rack;23, guide block;24, limit tooth;25, lightening groove. DETAILED DESCRIPTION

[0038] The utility model makes further detailed instructions in combination with the following drawings.

[0039] Embodiment

[0040] As Figure 1 And Figure 2The utility model provides a mixing machine with protection structure, including

[0041] Mixing machine main body 1, the lower side of one end of mixing machine main body 1 is provided with protection structure;

[0042] Protection structure, protection structure is located the lower side of mixing jar, and protection structure is used to handle dust;

[0043] Protection structure includes:

[0044] Shell 2, shell 2 is arranged in Z shape, and one side of shell 2 is fixedly connected with motor 3, and feeding inlet 4 and discharge outlet 5 are respectively formed in shell 2, and filter screen 6 is arranged in shell 2, and filter screen 6 is located below feeding inlet 4, and filter screen 6 is rotatably connected with shell 2;

[0045] Dust handling component, dust handling component is located the outside of shell 2, and dust handling component is used to handle dust;

[0046] Anti-blocking component, anti-blocking component is located above filter screen 6, and anti-blocking component is used to prevent the blocking of the inside of shell 2 caused by too fast raw material feeding;

[0047] Vibration component, vibration component is located below filter screen 6, and vibration component is used to make filter screen 6 in the vibration state.

[0048] In the embodiment, mixing machine main body 1 is composed of a support, a motor 3, a speed reducer, a mixing jar and a stirring rod, because it is a mature technology in the technical field of mixers, too much description is not given in the text;When mixing machine main body 1 works, granular raw materials are put into the feeding inlet on mixing machine main body 1, and after mixing, they are discharged from discharge outlet 5, at this time, the granular raw materials will be mixed with dust into the protection structure from discharge outlet 5, at this time, the raw materials will first pass through the anti-blocking component, which can control the speed of raw material feeding, and then pass through filter screen 6 for feeding, when passing through filter screen 6, the granular raw materials will be separated from the dust, and the dust will be treated by the dust handling component, when the dust handling component works, the vibration component will also act simultaneously to make filter screen 6 in the vibration state, so that the raw materials and the dust can be better separated, thereby reducing the probability of dust overflow and improving the mixing efficiency of mixing machine main body 1.

[0049] As Figure 4 And Figure 5 As shown in the embodiment, preferably, the anti-blocking component includes a rotating shaft 7, the rotating shaft 7 is rotatably connected with the shell 2, one end of the rotating shaft 7 is fixedly connected with the output end of the motor 3, a rotating roller 8 is fixedly connected on the rotating shaft 7, a plurality of grooves 9 are formed on the rotating roller 8 in the circumferential direction, and a matching block 10 is fixedly connected in the shell 2 in a symmetrical manner, and the matching block 10 is used in cooperation with the rotating roller 8.

[0050] When the raw material enters the housing 2 from the main body 1 through the discharge port 5 and the inlet 4 on the housing 2, the raw material will fall into the groove 9 on the rotating roller 8. The controller controls the motor 3 to start, and the motor 3 will drive the rotating shaft 7 fixedly connected to its output end to rotate, thereby driving the rotating roller 8 to rotate. The rotation of the rotating roller 8 will cause the groove 9 to rotate. The rotating roller 8 cooperates with the mating block 10 to transport the raw material from the top of the rotating roller 8 to the bottom of the rotating roller 8, thereby controlling the speed of the raw material falling and preventing the raw material from getting stuck.

[0051] like Figure 4 As shown, preferably, the dust treatment component includes a cylinder 11, a piston plate 12 is slidably connected inside the cylinder 11, a piston rod 13 is fixedly connected to one side of the piston plate 12, the piston rod 13 is slidably connected to the cylinder 11, a pressure plate 14 is fixedly connected to the end of the piston rod 13 away from the piston plate 12, a pressure spring 15 is fixedly connected to the side of the piston plate 12 near the piston rod 13, the other end of the pressure spring 15 is fixedly connected to the cylinder 11, a cam 16 is fixedly connected to the end of the rotating shaft 7 away from the motor 3, the cam 16 works in conjunction with the pressure plate 14, and an air inlet and an exhaust outlet are respectively opened on the cylinder 11.

[0052] When the raw material passes through the roller 8 and the filter screen 6, it rolls down through the inclined filter screen 6 to the outlet 5 of the housing 2. At the same time, the motor 3 starts and drives the rotating shaft 7, which is fixedly connected to its output end, to rotate. The rotation of the rotating shaft 7 drives the cam 16, which is fixedly connected to it, to rotate. The rotation of the cam 16 squeezes the pressure plate 14, causing the pressure plate 14 to move downward. The pressure spring 15 is in an extended state. The downward movement of the pressure plate 14 drives the piston rod 13 and piston plate 12, which are fixedly connected to it, to move downward. At this time, the air in the cylinder 11 is compressed, and the air is discharged into the water through the one-way valve, the exhaust port, and the discharge pipe. Then, the cam 16 rotates and disengages from the pressure plate 14. At this time, the pressure plate 14 returns to its original position under the action of the pressure spring 15. At this time, the piston plate 12 moves upward under the action of the pressure plate 14 and the piston rod 13, thereby drawing in the air containing dust from the housing 2 through the one-way valve and the air inlet, thus achieving the purpose of treating the dust mixed with the raw material in the housing 2.

[0053] like Figure 4 As shown, preferably, the vibration component includes a drive shaft 17, which is symmetrically arranged and rotatably connected to the housing 2. One end of the drive shaft 17 is fixedly connected to a gear 18, and a portion of the drive shaft 17 away from the gear 18 is provided with threads. A movable block 19 is symmetrically arranged and slidably connected inside the housing 2. The movable block 19 is threadedly connected to the drive shaft 17. An arc surface 20 is provided on the movable block 19. An extension rod 21 is symmetrically arranged and fixedly connected to the pressure plate 14. A rack 22 is fixedly connected to the end of the extension rod 21 away from the pressure plate 14, and the rack 22 meshes with the gear 18.

[0054] When the pressure plate 14 moves up and down reciprocally under the action of the cam 16, it will drive the rack 22 to move through the extension rod 21. Because the rack 22 meshes with the gear 18, the gear 18 drives the transmission shaft 17 to move under the action of the rack 22. Because one end of the transmission shaft 17 is threadedly connected to the moving block 19 and the moving block 19 is threadedly connected to the housing 2, the rotation of the transmission shaft 17 will drive the moving block 19 to move back and forth along its axis, thereby achieving the purpose of pressing against the filter screen 6. The reciprocating moving block 19 will cause the filter screen 6 to vibrate, thereby separating some dust with strong adhesion to the raw material from the raw material, thus enabling better dust removal.

[0055] like Figure 5 As shown, preferably, guide blocks 23 are symmetrically arranged above the mating block 10 inside the housing 2. The guide blocks 23 are triangular in shape and fixedly connected to the mating block 10.

[0056] By providing a guide block 23 above the mating block 10, the raw material can be effectively guided to fall, so that the raw material can fall into the groove 9 and prevent any raw material from remaining inside the shell 2.

[0057] like Figure 4 As shown, preferably, the two ends of the rack 22 are fixedly connected to the limiting teeth 24.

[0058] When the rack 22 and the gear 18 mesh with each other, the motion overload will cause the gear 18 and the rack 22 to disengage, which will cause the device to malfunction. By fixing the limit teeth 24 at both ends of the rack 22, the disengagement of the rack 22 and the gear 18 when they mesh with each other can be prevented.

[0059] like Figure 4 As shown, preferably, the movable block 19 has a weight reduction groove 25.

[0060] By incorporating the weight-reducing groove 25, the weight of the moving block 19 can be reduced, thereby reducing the load on the motor 3 and decreasing energy consumption.

[0061] The working principle of this mixer with a protective structure will be explained in detail below.

[0062] like Figure 1 - Figure 5As shown, when the mixer body 1 is working, granular raw materials are put into the feed port on the mixer body 1, and after mixing, they are discharged from the discharge port 5. At this time, the granular raw materials will be mixed with dust and enter the protective structure from the discharge port 5. The raw materials will first pass through the anti-clogging component, which can control the feeding speed of the raw materials, and then be fed through the filter screen 6. When passing through the filter screen 6, the granular raw materials will be separated from the dust. The dust will be treated by the dust treatment component. When the dust treatment component is working, the vibration component will also work at the same time to make the filter screen 6 vibrate, so that the raw materials and dust can be better separated, thereby reducing the probability of dust overflow and improving the mixing efficiency of the mixer body 1. When the raw material enters the housing 2 from the main body 1 through the discharge port 5 and the inlet 4 on the housing 2, the raw material will fall into the groove 9 on the rotating roller 8. The controller controls the motor 3 to start, and the motor 3 will drive the rotating shaft 7 fixedly connected to its output end to rotate, thereby driving the rotating roller 8 to rotate. The rotation of the rotating roller 8 will cause the groove 9 to rotate. The rotating roller 8 cooperates with the mating block 10 to transport the raw material from the top of the rotating roller 8 to the bottom of the rotating roller 8, thereby controlling the speed of the raw material falling and preventing the raw material from getting stuck. When the raw material passes through the roller 8 and the filter screen 6, it rolls down through the inclined filter screen 6 to the outlet 5 of the housing 2. At the same time, the motor 3 starts and drives the rotating shaft 7, which is fixedly connected to its output end, to rotate. The rotation of the rotating shaft 7 drives the cam 16, which is fixedly connected to it, to rotate. The rotation of the cam 16 squeezes the pressure plate 14, causing the pressure plate 14 to move downward. The pressure spring 15 is in an extended state. The downward movement of the pressure plate 14 drives the piston rod 13 and piston plate 12, which are fixedly connected to it, to move downward. At this time, the air in the cylinder 11 is compressed, and the air is discharged into the water through the one-way valve, the exhaust port, and the discharge pipe. Then, the cam 16 rotates and disengages from the pressure plate 14. At this time, the pressure plate 14 returns to its original position under the action of the pressure spring 15. At this time, the piston plate 12 moves upward under the action of the pressure plate 14 and the piston rod 13, thereby drawing in the air containing dust from the housing 2 through the one-way valve and the air inlet, thus achieving the purpose of treating the dust mixed with the raw material in the housing 2. When the pressure plate 14 moves up and down reciprocally under the action of the cam 16, it will drive the rack 22 to move through the extension rod 21. Because the rack 22 meshes with the gear 18, the gear 18 drives the transmission shaft 17 to move under the action of the rack 22. Because one end of the transmission shaft 17 is threadedly connected to the moving block 19 and the moving block 19 is threadedly connected to the housing 2, the rotation of the transmission shaft 17 will drive the moving block 19 to move back and forth along its axis, thereby achieving the purpose of pressing against the filter screen 6. The reciprocating moving block 19 will cause the filter screen 6 to vibrate, thereby separating some dust with strong adhesion to the raw material from the raw material, thus enabling better dust removal.By providing a guide block 23 above the mating block 10, the raw material can be effectively guided to fall, ensuring that all the raw material falls into the groove 9 and preventing any material residue inside the housing 2. When the rack 22 and gear 18 mesh, overload can cause the gear 18 and rack 22 to disengage, which will prevent the device from working properly. By fixing limit teeth 24 at both ends of the rack 22, disengagement of the rack 22 and gear 18 during meshing can be prevented. By providing a weight-reducing groove 25, the weight of the moving block 19 can be reduced, thereby reducing the load on the motor 3 and reducing energy consumption.

[0063] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A mixer with a protective structure. Its characteristics include: The mixer body (1) has a protective structure provided at the lower end of one end; A protective structure located below the mixing tank, the protective structure being used to handle dust; The protective structure includes: The housing (2) is arranged in a Z-shape. A motor (3) is fixedly connected to one side of the housing (2). The housing (2) is provided with a feed inlet (4) and a discharge outlet (5). A filter screen (6) is provided inside the housing (2). The filter screen (6) is located below the feed inlet (4). The filter screen (6) is rotatably connected to the housing (2). A dust treatment component is located outside the housing (2) and is used to treat dust. An anti-clogging component is located above the filter screen (6) and is used to prevent the material from being fed too quickly, which would cause blockage inside the housing (2). A vibrating component is located below the filter screen (6) and is used to make the filter screen (6) vibrate.

2. The mixer with a protective structure according to claim 1, characterized in that: The anti-clogging component includes a rotating shaft (7), which is rotatably connected to the housing (2). One end of the rotating shaft (7) is fixedly connected to the output end of the motor (3). A rotating roller (8) is fixedly connected to the rotating shaft (7). Several grooves (9) are provided on the rotating roller (8) along the circumferential direction. A mating block (10) is symmetrically arranged and fixedly connected inside the housing (2). The mating block (10) is used in conjunction with the rotating roller (8).

3. The mixer with a protective structure according to claim 2, characterized in that: The dust treatment component includes a cylinder (11), a piston plate (12) is slidably connected inside the cylinder (11), a piston rod (13) is fixedly connected to one side of the piston plate (12), the piston rod (13) is slidably connected to the cylinder (11), a pressure plate (14) is fixedly connected to the end of the piston rod (13) away from the piston plate (12), a pressure spring (15) is fixedly connected to the side of the piston plate (12) near the piston rod (13), the other end of the pressure spring (15) is fixedly connected to the cylinder (11), a cam (16) is fixedly connected to the end of the rotating shaft (7) away from the motor (3), the cam (16) is used in conjunction with the pressure plate (14), and an air inlet and an exhaust outlet are respectively opened on the cylinder (11).

4. The mixer with a protective structure according to claim 3, characterized in that: The vibration component includes a drive shaft (17), which is symmetrically arranged and rotatably connected to the housing (2). One end of the drive shaft (17) is fixedly connected to a gear (18). A portion of the drive shaft (17) away from the gear (18) is provided with threads. A movable block (19) is symmetrically arranged and slidably connected inside the housing (2). The movable block (19) is threadedly connected to the drive shaft (17). An arc surface (20) is provided on the movable block (19). An extension rod (21) is symmetrically arranged and fixedly connected on the pressure plate (14). A rack (22) is fixedly connected to the end of the extension rod (21) away from the pressure plate (14). The rack (22) meshes with the gear (18).

5. The mixer with a protective structure according to claim 4, characterized in that: A guide block (23) is symmetrically arranged above the mating block (10) inside the housing (2). The guide block (23) is triangular in shape and fixedly connected to the mating block (10).

6. The mixer with a protective structure according to claim 5, characterized in that: Limiting teeth (24) are fixedly connected to both ends of the rack (22).

7. The mixer with a protective structure according to claim 6, characterized in that: The movable block (19) is provided with a weight reduction groove (25).

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