CN224114061U - A waste recycling and crushing device for electronic components - Google Patents

Abstract

This utility model discloses an electronic component waste recycling and crushing device, specifically relating to the field of crushing device technology. It includes a base, a first working box, a second working box, an adjustable feeding component, and a crushing gas treatment device. The first working box is located on the upper surface of the base, and the second working box is located within the inner cavity of the first working box. The adjustable feeding component is located within the inner cavity of the second working box, and the crushing gas treatment device is located on one side of the adjustable feeding component. A crushing mechanism is located on another side of the adjustable feeding component. Electronic component waste is fed through the inlet, and the feeding speed is adjusted by the adjustable feeding component. The crushing mechanism crushes the electronic component waste, and during the crushing process, the crushing gas treatment device reduces dust and purifies the gas generated during crushing, preventing the generation of dust containing heavy metals or volatile organic compounds during the crushing process, which could easily cause secondary pollution.

Description

Electronic components waste recycling breaker

Technical Field

The utility model relates to the technical field of crushing devices, in particular to a crushing device for recycling electronic component waste.

Background

The electronic component waste recycling and crushing device is mechanical equipment specially used for treating waste electronic components, and has the main functions of decomposing the waste electronic components into smaller particles or fragments in a physical crushing mode so as to facilitate the subsequent separation, classification and resource utilization. The device has important function in the recovery treatment of electronic wastes, can effectively improve the recovery rate of resources and reduce environmental pollution;

The application number CN202121430798.5 discloses a recovery, crushing and separation device for waste electronic components, which solves the problems that the recovery device for waste electronic components used in the market usually compresses the waste electronic components into blocks for recovery, and some waste electronic components are still large in volume after being compressed into blocks, so that the recovery is inconvenient, the waste electronic components cannot be crushed into smaller waste materials for centralized treatment, waste materials with different sizes can be generated after the waste electronic components are crushed, and the waste materials with different sizes cannot be separated and centralized treated, but when the waste electronic components are crushed, dust or volatile organic matters containing heavy metals can be generated in the crushing process, so that secondary pollution is easy to cause;

Therefore, an electronic component waste recycling and crushing device is provided for solving the problems.

Disclosure of utility model

In order to overcome the above-mentioned drawbacks of the prior art, the present utility model provides an electronic component waste recycling and crushing device, so as to solve the above-mentioned problems in the prior art.

The electronic component waste recycling and crushing device comprises a base, a first working box, a second working box, a feeding adjustable component and a crushing gas treatment device, wherein the first working box is arranged on the upper end face of the base, the second working box is arranged in the inner cavity of the first working box, the feeding adjustable component is arranged in the inner cavity of the second working box, the crushing gas treatment device is arranged on one side of the feeding adjustable component, and the upper end face of the second working box penetrates through the first working box and is connected with a feed inlet;

The smashing gas treatment device comprises a dust falling mechanism and a gas treatment mechanism, wherein the dust falling mechanism is arranged in an inner cavity of a second working box, the side wall of the inner cavity of the second working box is provided with the gas treatment mechanism, the dust falling mechanism comprises a water tank and a water inlet, the water tank is arranged in the inner cavity of the second working box and is connected with the water inlet in a communicating manner, the lower part of the water tank is connected with the input end of a water pump through a water pipe, the output end of the water pump is connected with a fixing frame through a water pipe, and the lower end face of the fixing frame is provided with a spray nozzle.

Preferably, the gas treatment mechanism comprises a gas inlet and a gas outlet, the gas inlet and the gas outlet are all arranged on the side end faces of the second working box, the gas inlet is specifically arranged below the gas outlet, the gas inlet and the gas outlet are both provided with a gas exhaust fan, the two sides of the gas exhaust fan are both provided with filter screens, one side of the gas inlet is provided with a first guide block, the side end faces of the first guide block transversely penetrate through the gas outlet, the edge of the first guide block is provided with a grating plate, and the upper end face and the lower end face of the grating plate are provided with the filter screens.

Preferably, the adjustable subassembly of pay-off includes second guide block and hydraulic telescoping rod, the inner chamber at the second work box is installed to the second guide block, and the up end of second guide block is provided with hydraulic telescoping rod to hydraulic telescoping rod's flexible end is provided with the third guide block, the top of third guide block is provided with the fourth guide block, the lateral wall of second work box inner chamber is provided with the recess, the bottom face of third guide block is provided with the expansion plate.

Preferably, one side of the feeding adjustable component is provided with a crushing mechanism, a discharge hole is formed below the crushing mechanism, the side wall of the third guide block is provided with a sliding block, and the third guide block is connected with a sliding groove through the sliding block of the side end face in a sliding manner.

Preferably, the crushing mechanism comprises a driving mechanism, a first crushing roller and a second crushing roller, the driving mechanism is arranged between the first working box and the second working box, the output end of the driving mechanism is respectively in transmission connection with the first crushing roller and the second crushing roller, the driving mechanism comprises a stepping motor and a first gear, the output end of the stepping motor is provided with the first gear, the first gear is connected with a first double gear shaft through a first chain, the first double gear shaft is connected with a second double gear shaft through a second chain, and the second double gear shaft is connected with a second gear through a third chain.

Preferably, the water tank and the water inlet form a communication structure, the water tank and the spray nozzle are communicated with each other through a water pipe to be connected with the water pump, and the air inlet forms a communication structure through an inner cavity of the second working box and an air vent dug on the side end face of the first guide block and an air outlet.

Preferably, the feeding hole and the discharging hole form a communicating structure through the first working box and the second working box, the third guide block and the second working box form a sliding structure through the sliding block and the sliding groove, and the third guide block and the second working box form a sliding structure through the groove.

Preferably, the driving mechanism is provided with four groups, the first crushing roller and the second crushing roller are both provided with two groups, the first double gear shaft, the second double gear shaft and the second gear are arranged at two ends of the two groups of first crushing roller and the two groups of second crushing roller, the outer surfaces of the first crushing roller and the second crushing roller are respectively provided with conical teeth and triangular conical teeth, and the stepping motor forms a chain transmission structure with the first crushing roller and the second crushing roller through the first gear, the first chain, the first double gear shaft, the second chain, the second double gear shaft, the third chain and the second gear.

The utility model has the technical effects and advantages that:

compared with the prior art, this breaker is retrieved to electronic components waste material is in use, wherein throw into electronic components waste material through the feed inlet, adjust feeding speed through pay-off adjustable subassembly, then smash electronic components waste material through crushing mechanism to smash the in-process through smashing gas treatment device and carry out dust fall and gas purification to the powder that produces in the crushing process, and then avoid "probably producing dust or the volatile organic compounds that contain heavy metal in the crushing process, and then cause the condition emergence of secondary pollution" easily.

Compared with the prior art, this breaker is retrieved to electronic components waste material is in use, wherein carry out dust fall and gas purification through smashing the powder gas that gas processing apparatus produced in the process of smashing, the infusion has the washing liquid to the water tank inner chamber through the water inlet, start the water pump, the water pump is got rid of washing liquid from the atomizer through the water pipe, utilize washing liquid and dust-laden gas fully to contact, wash the dust particle and make gas purification, carry out gas discharge through gas processing mechanism simultaneously, start exhaust fan, and the exhaust fan wind direction of air inlet and gas vent inboard is opposite, so that gas ventilates through the air inlet and the air vent that the side terminal surface of first guide block dug, and gas is got rid of from the air inlet through the grid board, and then be favorable to assisting dust fall mechanism to dust fall and gas purification, be convenient for gas directional the getting rid of simultaneously, avoid "probably producing dust or the volatile organic compounds that contain heavy metal in the process of smashing, and then the condition emergence of causing" easily.

Compared with the prior art, this breaker is retrieved to electronic components waste material is in use, wherein utilize the adjustable subassembly of pay-off to adjust the speed of feed inlet feeding, start hydraulic telescoping rod, hydraulic telescoping rod drives the third guide block and slides from top to bottom along slider, spout and recess, and wherein shortest distance from the top down between third guide block and the fourth guide block shortens gradually, adjust the speed of feed inlet feeding through adjusting shortest distance between third guide block and the fourth guide block, when the third guide block reciprocates simultaneously, the expansion plate stretches out and draws back from top to bottom, avoid electronic components waste material to influence hydraulic telescoping rod and stretch out and draw back from top to bottom, realize adjusting the speed of pay-off through above-mentioned structure, and then be convenient for smash electronic components waste material.

Compared with the prior art, this breaker is retrieved to electronic components waste material is in use, wherein electronic components waste material drops into through the feed inlet, and adjust the speed of pay-off through pay-off adjustable component, then smash electronic components waste material through crushing mechanism, step motor among the actuating mechanism starts, and because step motor passes through first gear, first chain, first double gear axle, the second chain, the second double gear axle, third chain and second gear constitute chain transmission structure with first crushing roller and second crushing roller, and then be convenient for smash electronic components waste material through first gear, first chain, first double gear axle, the second chain, second double gear axle, third chain and second gear drive first crushing roller and second crushing roller, and then be convenient for obtain the electronic components waste material that the shape is little, finally electronic components waste material after smashing is discharged from the discharge gate.

Drawings

Fig. 1 is a schematic perspective view of a first working box according to the present utility model.

FIG. 2 is a schematic diagram of the front section of the dust settling mechanism.

FIG. 3 is a schematic illustration of a schematic elevation view of a gas treatment mechanism according to the present utility model.

Fig. 4 is a schematic view of a top-down structure of a feed adjustable assembly according to the present utility model.

FIG. 5 is a schematic view showing the normal cross-sectional structure of the pulverizing mechanism of the present utility model.

Fig. 6 is a schematic perspective view of a second pulverizing roller according to the present utility model.

The device comprises 1, a base, 2, a first working box, 3, a second working box, 4, a feeding adjustable component, 41, a second guide block, 42, a hydraulic telescopic rod, 43, a third guide block, 44, a fourth guide block, 45, a groove, 46, a telescopic plate, 5, a crushing gas treatment device, 51, a dust fall mechanism, 511, a water tank, 512, a water inlet, 513, a water pump, 514, a fixing frame, 515, a spray nozzle, 52, a gas treatment mechanism, 521, an air inlet, 522, an air outlet, 523, an exhaust fan, 524, a first guide block, 525, an air vent, 526, a grid plate, 6, a feed inlet, 7, a crushing mechanism, 71, a driving mechanism, 711, a stepping motor, 712, a first gear, 713, a first chain, 714, a first double gear shaft, 715, a second chain, 716, a second double gear shaft, 717, a third chain, 718, a second gear, 72, a first crushing roller, 73, a second crushing roller, 8, a discharge port, 9, a sliding block, 10 and a sliding chute.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

The electronic component waste recycling and crushing device comprises a base 1, a first working box 2, a second working box 3, a feeding adjustable component 4 and a crushing gas treatment device 5, wherein the first working box 2 is arranged on the upper end face of the base 1, the second working box 3 is arranged in the inner cavity of the first working box 2, the feeding adjustable component 4 is arranged in the inner cavity of the second working box 3, the feeding speed is adjusted by the feeding adjustable component 4, the crushing gas treatment device 5 is arranged on one side of the feeding adjustable component 4, dust and gas purification are carried out on powder generated in the crushing process by the crushing gas treatment device 5, the situation that heavy metal-containing dust or volatile organic matters possibly occur in the crushing process and secondary pollution is easily caused is avoided, the upper end face of the second working box 3 penetrates through the first working box 2, the electronic component waste is input by the feed port 6, a crushing mechanism 7 is arranged on one side of the feeding adjustable component 4, the electronic component waste is crushed by the crushing mechanism 7, a lower part of the crushing mechanism 7 is provided with a guide block 8, and a third side of the crushing mechanism 7 is connected with a sliding block 43 through a first side wall 9 and a sliding block 9, and a sliding block 43 is arranged on the side of the sliding block 9, and the sliding block is connected with the side of the second side of the sliding block 3 and the sliding block 9 is communicated with the first side of the sliding block 9;

Wherein dust fall and gas purification are carried out on powder gas generated in the crushing process by utilizing the crushing gas treatment device 5, the crushing gas treatment device 5 comprises a dust fall mechanism 51 and a gas treatment mechanism 52, the dust fall mechanism 51 is arranged in the inner cavity of the second working tank 3, the side wall of the inner cavity of the second working tank 3 is provided with the gas treatment mechanism 52, the dust fall mechanism 51 comprises a water tank 511 and a water inlet 512, the water tank 511 is arranged in the inner cavity of the second working tank 3, the water tank 511 is communicated and connected with the water inlet 512, washing liquid is infused into the inner cavity of the water tank 511 by utilizing the water inlet 512, the lower part of the water tank 511 is connected with the input end of a water pump 513 through a water pipe, the output end of the water pump 513 is connected with a fixing frame 514 through a water pipe, the lower end of the fixing frame 514 is provided with a spray nozzle 515, the water tank 511 and the water inlet 512 form a communication structure, the water tank 511 and the spray nozzle 515 are connected with the water pump 513 through the water pipe, the water pump 513 is started, the water pump 513 discharges the washing liquid from the spray nozzle 515 by utilizing the water pipe, the washing liquid is fully contacted with the dust-containing gas, the dust particles are washed down to purify the gas, the gas treatment mechanism 52 comprises an air inlet 521 and an air outlet 522, the air inlet 521 and the air outlet 522 are both arranged on the side end face of the second working box 3, the air inlet 521 is specifically arranged below the air outlet 522, the air inlet 521 and the air outlet 522 are both provided with an air exhaust fan 523, the two sides of the air exhaust fan 523 are both provided with filter screens, one side of the air inlet 521 is provided with a first guide block 524, the side end face of the first guide block 524 is transversely penetrated with a vent hole 525, the edge of the first guide block 524 is provided with a grating plate 526, the upper end face and the lower end face of the grating plate 526 are provided with filter screens, the air inlet 521 and the air exhaust fan 523 inside the air outlet 522 are started, the air is ventilated by utilizing the air inlet 521 and the vent holes 525 dug on the side end surface of the first guide block 524, the air is discharged from the air inlet 521 through the grating plate 526, which is favorable for assisting the dust settling mechanism 51 in dust settling and air purification, is convenient for directional discharge of the air, and avoids the situation that heavy metal-containing dust or volatile organic matters possibly occur in the crushing process, and further secondary pollution is easy to occur, and the air inlet 521 forms a communication structure with the air outlet 522 through the inner cavity of the second working box 3 and the vent holes 525 dug on the side end surface of the first guide block 524;

The feeding speed of the feeding port 6 is regulated by the feeding adjustable component 4, the feeding adjustable component 4 comprises a second guide block 41 and a hydraulic telescopic rod 42, the second guide block 41 is arranged in the inner cavity of the second working box 3, the upper end face of the second guide block 41 is provided with the hydraulic telescopic rod 42, the telescopic end of the hydraulic telescopic rod 42 is provided with a third guide block 43, a fourth guide block 44 is arranged above the third guide block 43, the shortest distance between the third guide block 43 and the fourth guide block 44 is gradually shortened from top to bottom, the side wall of the inner cavity of the second working box 3 is provided with a groove 45, the bottom end face of the third guide block 43 is provided with a telescopic plate 46, when the third guide block 43 moves up and down, the telescopic plate 46 stretches up and down, the electronic component waste is prevented from affecting the hydraulic telescopic rod 42 to stretch up and down, the third guide block 43 forms a sliding structure with the second working box 3 through the sliding block 9 and the sliding chute 10, the third guide block 43 forms a sliding structure with the second working box 3 through the groove 45, the shortest distance between the third guide block 43 and the fourth guide block 44 is regulated, the speed of the electronic component is regulated to drive the sliding block 10 to the sliding speed of the electronic component to stretch down along the sliding block 42, the sliding speed of the sliding guide block 4 is regulated, and the electronic component is convenient to crush the electronic component to move up and down along the groove 42, and the sliding speed is regulated to stretch down along the groove 42;

Wherein the electronic component waste is crushed by the crushing mechanism 7, the crushing mechanism 7 comprises a driving mechanism 71, a first crushing roller 72 and a second crushing roller 73, the driving mechanism 71 is arranged between the first working box 2 and the second working box 3, the output end of the driving mechanism 71 is respectively connected with the first crushing roller 72 and the second crushing roller 73 in a transmission way, the driving mechanism 71 comprises a stepping motor 711 and a first gear 712, the output end of the stepping motor 711 is provided with the first gear 712, the first gear 712 is connected with a first double gear shaft 714 through a first chain 713, the first double gear shaft 714 is connected with a second double gear shaft 716 through a second chain 715, the second double gear shaft 716 is connected with a second gear 718 through a third chain 717, the driving mechanism 71 is provided with four groups, the first crushing roller 72 and the second crushing roller 73 are provided with two groups, the first double gear shaft 714, the second double gear shaft 716 and the second gear 718 are installed at two ends of the two groups of the first crushing roller 72 and the two groups of the second crushing roller 73, the outer surfaces of the first crushing roller 72 and the second crushing roller 73 are respectively provided with conical teeth and triangular conical teeth, the stepping motor 711 in the driving mechanism 71 is started, and as the stepping motor 711 forms a chain transmission structure with the first crushing roller 72 and the second crushing roller 73 through the first gear 712, the first chain 713, the first double gear shaft 714, the second chain 715, the second double gear shaft 716, the third chain 717 and the second gear 718, the first crushing roller 72 and the second crushing roller 73 are driven by the first gear 712, the first chain 713, the first double gear shaft 714, the second chain 715, the third chain 717 and the second gear 718 to crush electronic component wastes to obtain small-shaped electronic component wastes, the waste materials of the electronic components after final crushing are discharged from the discharge port 8, in this embodiment, the hydraulic telescopic rod 42, the water pump 513, the spray nozzle 515, the exhaust fan 523, the stepping motor 711 and the like are all known devices which are directly purchased in the market and can be customized or selected according to actual demands, and only the waste materials are used here, and the structure and the function of the waste materials are not improved, so that detailed descriptions are omitted.

The working process of the utility model is as follows: firstly, electronic component waste is input through a feed port 6, the speed of feeding through the feed port 6 is regulated through a feeding adjustable component 4, a hydraulic telescopic rod 42 is started, the hydraulic telescopic rod 42 drives a third guide block 43 to slide up and down along a sliding block 9, a sliding chute 10 and a groove 45, the shortest distance between the third guide block 43 and a fourth guide block 44 is regulated, meanwhile, when the third guide block 43 moves up and down, a telescopic plate 46 stretches up and down, the electronic component waste is crushed by utilizing a crushing mechanism 7, a stepping motor 711 in a driving mechanism 71 is started, and as the stepping motor 711 forms a chain transmission structure with a first crushing roller 72 and a second crushing roller 73 through a first gear 713, a first double gear shaft 714, a second chain 715, a second double gear shaft 716, a third chain 717 and a second gear 718, the first pulverizing roller 72 and the second pulverizing roller 73 are convenient to rotate to pulverize the electronic component waste, the pulverized electronic component waste is discharged from the discharge port 8, dust and gas generated in the pulverizing process are reduced by the pulverizing gas treatment device 5, washing liquid is infused into the inner cavity of the water tank 511 through the water inlet 512, the water pump 513 is started, the washing liquid is discharged from the spray nozzle 515 through the water pipe by the water pump 513, the washing liquid is fully contacted with dust-containing gas, the dust particles are washed down to purify the gas, the gas is discharged through the gas treatment mechanism 52, the exhaust fan 523 is started, the air directions of the exhaust fan 523 at the inner side of the air inlet 521 and the air outlet 522 are opposite, the gas is ventilated through the vent holes 525 dug at the side end surfaces of the air inlet 521 and the first guide block 524, the gas is discharged from the air inlet 521 through the grid plate 526, the auxiliary dust settling mechanism 51 is beneficial to dust settling and gas purification, and meanwhile, the directional gas removal is convenient.

Claims (8)

1. The electronic component waste recycling and crushing device comprises a base (1), a first working box (2), a second working box (3), a feeding adjustable component (4) and a crushing gas treatment device (5), and is characterized in that the first working box (2) is arranged on the upper end face of the base (1), the second working box (3) is arranged in an inner cavity of the first working box (2), the feeding adjustable component (4) is arranged in an inner cavity of the second working box (3), the crushing gas treatment device (5) is arranged on one side of the feeding adjustable component (4), and a feeding inlet (6) is formed in the upper end face of the second working box (3) penetrating through the first working box (2);

The utility model provides a smash gaseous processing apparatus (5) including dust fall mechanism (51) and gas treatment mechanism (52), dust fall mechanism (51) are installed in the inner chamber of second work box (3), and the lateral wall in second work box (3) inner chamber is provided with gas treatment mechanism (52), dust fall mechanism (51) include water tank (511) and water inlet (512), the inner chamber at second work box (3) is installed in water tank (511), and water tank (511) intercommunication is connected with water inlet (512), the below of water tank (511) is connected with the input of water pump (513) through the water pipe, and the output of water pump (513) is connected with mount (514) through the water pipe to the lower terminal surface of mount (514) is provided with spray nozzle (515).

2. The electronic component waste recycling and crushing device according to claim 1, wherein the gas treatment mechanism (52) comprises a gas inlet (521) and a gas outlet (522), the gas inlet (521) and the gas outlet (522) are both arranged on the side end face of the second working box (3), the gas inlet (521) is specifically arranged below the gas outlet (522), the gas inlet (521) and the gas outlet (522) are both provided with a gas exhaust fan (523), the two sides of the gas exhaust fan (523) are both provided with filter screens, one side of the gas inlet (521) is provided with a first guide block (524), the side end face of the first guide block (524) transversely penetrates through a vent hole (525), a grid plate (526) is arranged at the edge of the first guide block (524), and the upper end face and the lower end face of the grid plate (526) are provided with filter screens.

3. The electronic component waste recycling and crushing device according to claim 1, wherein the feeding adjustable assembly (4) comprises a second guide block (41) and a hydraulic telescopic rod (42), the second guide block (41) is arranged in an inner cavity of the second working box (3), the upper end face of the second guide block (41) is provided with the hydraulic telescopic rod (42), the telescopic end of the hydraulic telescopic rod (42) is provided with a third guide block (43), a fourth guide block (44) is arranged above the third guide block (43), a groove (45) is formed in the side wall of the inner cavity of the second working box (3), and a telescopic plate (46) is arranged on the bottom end face of the third guide block (43).

4. The electronic component waste recycling and crushing device according to claim 3, wherein a crushing mechanism (7) is arranged on one side of the feeding adjustable assembly (4), a discharge hole (8) is formed below the crushing mechanism (7), a sliding block (9) is arranged on the side wall of the third guide block (43), and the third guide block (43) is connected with a sliding groove (10) in a sliding manner through the sliding block (9) on the side end face.

5. The electronic component waste recycling and crushing device according to claim 4, wherein the crushing mechanism (7) comprises a driving mechanism (71), a first crushing roller (72) and a second crushing roller (73), the driving mechanism (71) is installed between the first working box (2) and the second working box (3), the output end of the driving mechanism (71) is respectively in transmission connection with the first crushing roller (72) and the second crushing roller (73), the driving mechanism (71) comprises a stepping motor (711) and a first gear (712), the output end of the stepping motor (711) is provided with the first gear (712), the first gear (712) is connected with a first double gear shaft (714) through a first chain (713), the first double gear shaft (714) is connected with a second double gear shaft (716) through a second chain (713), and the second double gear shaft (716) is connected with a second gear shaft (718) through a third chain (717).

6. The electronic component waste recycling and crushing device according to claim 2, wherein the water tank (511) and the water inlet (512) form a communication structure, the water tank (511) and the spray nozzle (515) are connected with the water pump (513) through water pipes, and the air inlet (521) and the air outlet (522) form a communication structure through an inner cavity of the second working box (3) and an air vent (525) dug on the side end face of the first guide block (524).

7. The electronic component waste recycling and crushing device according to claim 4, wherein the feeding hole (6) and the discharging hole (8) form a communicating structure through the first working box (2) and the second working box (3), the third guide block (43) and the second working box (3) form a sliding structure through the sliding block (9) and the sliding groove (10), and the third guide block (43) and the second working box (3) form a sliding structure through the groove (45).

8. The electronic component waste recycling and crushing device according to claim 5, wherein the driving mechanism (71) is provided with four groups, the first crushing roller (72) and the second crushing roller (73) are respectively provided with two groups, the first double gear shaft (714), the second double gear shaft (716) and the second gear (718) are arranged at two ends of the two groups of the first crushing roller (72) and the two groups of the second crushing roller (73), conical teeth and triangular conical teeth are respectively arranged on the outer surfaces of the first crushing roller (72) and the second crushing roller (73), and the stepping motor (711) forms a chain transmission structure with the first crushing roller (72) and the second crushing roller (73) through the first gear (712), the first chain (713), the first double gear shaft (714), the second chain (715), the second double gear shaft (716), the third chain (717) and the second gear (718).