CN219923182U - Efficient automatic pulverizer - Google Patents

Abstract

The utility model discloses a high-efficiency automatic pulverizer, wherein two cutting drums are embedded and arranged at the bottom end of a feeding hopper on the inner side of the feeding hopper, a grinding motor is arranged on the outer side of one end of the feeding hopper, a driving gear is connected to the driving end of the grinding motor, a driven gear is arranged on the surface of the outer side of the feeding hopper on the meshing end of the driving gear, a discharging hopper is welded at the bottom end of the feeding hopper, sliding grooves are formed in the two ends of the outer side of the discharging hopper in a clamping manner, and the two ends of the outer side of the discharging hopper are embedded and provided with sliding grooves.

Description

Efficient automatic pulverizer

Technical Field

The utility model relates to the technical field of crushers, in particular to an efficient automatic crusher.

Background

The vegetable pulverizer aims at superfine pulverizing processing equipment of food materials, and can pulverize various materials with different properties, different shapes, different moisture, different sugar content and different viscosity at one time.

But present existing rubbing crusher, most function is all comparatively single, only can smash vegetables to when leading to smashing meat food, need throw in great manpower to improve the device, and also great to rubbing crusher's injury, so not only can reduce operating efficiency, also can increase the input of cost simultaneously, present existing rubbing crusher moreover can't directly carry out classifying screening to kibbling material after smashing, thereby increased the step of operation, increased operating personnel's input.

Disclosure of Invention

The utility model provides a high-efficiency automatic pulverizer, which can effectively solve the problems that in the prior art, the existing pulverizer is provided with a single function, and only vegetables can be pulverized, so that when meat foods are pulverized, the device is required to be improved by large manpower, and the pulverizer is also damaged greatly, so that the operation efficiency is reduced, the cost is increased, and the existing pulverizer cannot directly classify and screen pulverized materials after pulverization, so that the operation steps are increased, and the investment of operators is increased.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an efficient automatic pulverizer comprises a feeding bin, wherein the bottom end of the feeding bin is connected with a grinding and pulverizing mechanism;

the crushing and crushing mechanism comprises a feed hopper, a cutting roller, a crushing motor, a driving gear, a driven gear, a discharging hopper, a crushing bin, a sliding groove, a folding baffle, a sliding frame, a bolt limiter, a tearing groove seat, a tearing pot, a cutting hopper, a discharging pipe, a conveying rod, a driven bevel gear, a driving bevel gear rod, a driving motor, a driving belt pulley and a protection box;

the feeding bin is provided with a feeding hopper at the feeding end, and two cutting rollers are embedded and arranged at the bottom end of the feeding hopper at the inner side of the feeding bin;

the grinding motor is arranged at the outer side of one end of the feeding bin, the driving end of the grinding motor is connected with the driving gear, and the driven gear is arranged at the surface of the meshing end of the driving gear at the outer side of the feeding bin;

a discharging hopper is welded at the bottom end of the feeding bin, two ends of the outer side of the crushing bin are embedded in the outer side of the discharging hopper in a clamping manner, sliding grooves are formed in the two ends of the outer side of the crushing bin in a penetrating manner, and two folding baffles are arranged on the inner side of each sliding groove;

a sliding frame is clamped between the two folding baffles, a bolt limiter is welded at one end of the crushing bin, and a tearing pot is arranged in the middle of the crushing bin;

the outer side of the tearing pot is embedded with a tearing groove seat, the bottom end of the tearing groove seat is connected with a blanking pipe, the bottom end of the tearing pot penetrates through the blanking pipe to be connected with a conveying rod, and the inner side of the tearing groove seat and the outer side of the bottom end of the tearing pot are both wrapped with a shredding bucket;

the automatic transmission device is characterized in that driven bevel gears are welded at the bottom end of the transmission rod, driving bevel gear rods are meshed with the outer sides of the driven bevel gears, one end of each driving bevel gear rod is connected with a transmission motor, a transmission end of each transmission motor is connected with a driving belt pulley, and protection boxes are wrapped on the outer sides of the driven bevel gears and the driving bevel gear rods.

Preferably, the two outer side surfaces of the cutting drums are meshed, two ends of the sliding frame are connected with two outer side ends of the cutting hopper, and the top end and the bottom end of the tearing pot are arc-shaped.

Preferably, one end of the cutting roller penetrates through the feeding bin to be connected with the driving gear, the other end of the cutting roller penetrates through the feeding bin to be connected with the driven gear, and the bolt limiter is spirally embedded into the inner side of the sliding frame.

Preferably, the bottom end of the crushing bin is connected with a screening mechanism;

the screening mechanism comprises a screening bin, a screening disc sliding groove seat, a screening disc clamping seat, a screening disc fixing rod, a guide limiting frame, a communication window, a transmission toothed ring, a half-moon gear, a driven belt disc, a belt disc limiting frame, a screening disc, a baffle plate, a collecting drawer and a belt;

the bottom end of the crushing bin is connected with a screening bin, one end of the crushing bin is provided with four screen disc sliding groove seats on the inner side of the screening bin, and one end surface of each screen disc sliding groove seat and one end surface of the inner side of the screening bin are connected with screen disc clamping seats;

the inner sides of the screen tray clamping seats are respectively and slidably clamped with a screen tray fixing rod, a screen tray is clamped between the screen tray fixing rods, a baffle is arranged at one end of the screening bin, and a collecting drawer is slidably embedded at the bottom end of the screen tray at the inner side of the screening bin;

four communication windows are formed in one end of the outer side of the screening bin, two guide limiting frames are welded at two ends of the outer side of each communication window, and four transmission toothed rings are embedded in the inner side of each guide limiting frame in a sliding mode;

the belt pulley is characterized in that a half-moon gear is meshed in the middle of the transmission toothed ring, one end of the half-moon gear is connected with a driven belt pulley, a belt pulley limiting frame is clamped and embedded in the middle of the half-moon gear and the driven belt pulley, and a belt is sleeved on the inner side of the driven belt pulley.

Preferably, the transmission motor and the driving belt pulley are both arranged on the outer side surface of the screening bin, and one end of the driving conical toothed bar penetrates through the screening bin and is connected with the driving belt pulley.

Preferably, the driving belt pulley is connected with a plurality of driven belt pulleys through a belt, and the power input ends of the grinding motor and the transmission motor are connected with the power output end of an external control terminal.

Compared with the prior art, the utility model has the beneficial effects that: the utility model has scientific and reasonable structure, safe and convenient use,

1. be provided with feeding storehouse, the feeder hopper, cutting drum, grinding motor, the driving gear, driven gear and lower hopper, firstly will grind the motor and start, the grinding motor that starts at this time drives the driving gear and rotates, then the driving gear can drive the driven gear of meshing and rotate, and pivoted driving gear and driven gear can drive two cutting drums that are connected with it and rotate, afterwards will need kibbling vegetables or meat food pour into the feeding storehouse inside through the feeder hopper again, the material can be blocked by two meshing cutting drums afterwards, can prevent like this that meat or vegetables that have not been primarily cut from directly dropping to next link, thereby cause smashing inadequately, the material that is blocked afterwards can cut the material with two meshing cutting drums, kibbling material can drop through the cutter seam of meshing, finally drop to next link through lower hopper, can make the crushing of next link more abundant.

2. The automatic feeding device comprises a crushing bin, a sliding groove, a folding baffle, a sliding frame, a bolt limiter, a tearing groove seat, a tearing bowl, a cutting bucket, a blanking pipe, a conveying rod, driven bevel gears, a driving bevel gear rod and a transmission motor, wherein material powder falling from the blanking bucket can fall into the crushing bin, the transmission motor is started to rotate, the driving bevel gear rod can be driven to rotate by the driving bevel gear rod, the driving bevel gear rod can drive the meshed driven bevel gear to rotate, the driven bevel gear can drive the conveying rod at the top end and the tearing bowl to rotate finally, the tearing bowl can be used for crushing crushed materials through the cutting bucket wrapped at the outer side of the bottom end and the cutting bucket at the inner side of the tearing groove seat, a large number of metal knife tips are welded on the surface of the cutting bucket, the crushing of meat or vegetables can be carried out, the crushing of the tearing property can be carried out fully, the height of the sliding frame can be adjusted through the rotating bolt limiter during use, the height of the tearing groove seat can be adjusted through adjusting the height of the tearing groove seat, the gap of the tearing groove seat and the tearing bowl can be driven bevel gear rod can be driven, the size of the meshed material can be driven, the cutting bucket can be driven by the grinding, the cutting slag can be prevented from being continuously from sliding down through the cutting slag or from being wasted when the cutting bucket is crushed through the meat or the vegetables, and finally, and the cutting pipe can be continuously crushed down through the blanking pipe.

3. Be provided with screening storehouse, screening tray sliding tray seat, screening tray cassette, the screening tray dead lever, guide limit, the intercommunication window, the transmission ring gear, half month gear, driven belt pulley, belt pulley limit and screening tray, the material powder through the unloading pipe landing can drop to the screening tray top at last, the screening tray all slides the inlay card through the screening tray dead lever and is inside the screening tray cassette, thereby make things convenient for taking out at any time of screening tray, when can conveniently need the vegetables or the dregs of meat of single mesh number, the pivoted driving motor can drive driven belt pulley through the belt that initiative belt tooth is inside cup jointed and rotate, the half month gear that the driven belt pulley drive is connected rotates at this time, half month gear can drive the transmission ring gear of meshing and rotate, at this time the transmission ring gear can be at the inboard sliding displacement of guide limit, drive the screening tray cassette that connects through the intercommunication window at this time, thereby it is transmitted to drive the screening tray is inside the tray sliding tray seat of screening storehouse inboard one end, screen is classified more easily to vegetables or meat dregs according to mesh number through the screening tray.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

In the drawings:

FIG. 1 is a schematic view of the feed bin of the present utility model;

FIG. 2 is a schematic view of the cutting drum mounting structure of the present utility model;

FIG. 3 is a schematic cross-sectional view of a screening cartridge of the present utility model;

FIG. 4 is a schematic diagram of the A-amp configuration of FIG. 3 of the present utility model;

FIG. 5 is a schematic view of the guiding and spacing frame installation structure of the present utility model;

reference numerals in the drawings: 1. a feeding bin;

2. grinding and crushing mechanism; 201. a feed hopper; 202. a cutting drum; 203. a grinding motor; 204. a drive gear; 205. a driven gear; 206. discharging a hopper; 207. crushing the bin; 208. a sliding groove; 209. folding the baffle; 210. a carriage; 211. a bolt limiter; 212. a tearing groove seat; 213. tearing the pot; 214. a shredding bucket; 215. discharging pipes; 216. a transfer lever; 217. driven bevel teeth; 218. a driving conical toothed bar; 219. a drive motor; 220. a driving pulley; 221. a protection box;

3. a screening mechanism; 301. screening bins; 302. a screen tray sliding groove seat; 303. a screen tray clamping seat; 304. a screen tray fixing rod; 305. a guiding limit frame; 306. a communication window; 307. a drive ring gear; 308. a half moon gear; 309. a driven belt pulley; 310. a belt pulley limit frame; 311. a screen tray; 312. a baffle; 313. a collection drawer; 314. a belt.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Examples: as shown in fig. 1-5, the utility model provides a technical scheme of an efficient automatic pulverizer, which comprises a feeding bin 1, wherein the bottom end of the feeding bin 1 is connected with a grinding and pulverizing mechanism 2;

the crushing and pulverizing mechanism 2 includes a hopper 201, a cutting drum 202, a crushing motor 203, a driving gear 204, a driven gear 205, a discharging hopper 206, a crushing bin 207, a sliding groove 208, a folding baffle 209, a sliding frame 210, a bolt limiter 211, a tearing groove seat 212, a tearing bowl 213, a crushing hopper 214, a discharging pipe 215, a conveying rod 216, a driven bevel 217, a driving bevel gear 218, a driving motor 219, a driving pulley 220, and a protection box 221;

in order to more fully crush vegetables and meats, a feeding hopper 201 is arranged at the feeding end of a feeding bin 1, two cutting drums 202 are embedded and arranged at the bottom end of the feeding hopper 201 on the inner side of the feeding bin 1, the outer side surfaces of the two cutting drums 202 are meshed, a crushing motor 203 is arranged on the outer side of one end of the feeding bin 1, the driving end of the crushing motor 203 is connected with a driving gear 204, a driven gear 205 is arranged on the outer side surface of the feeding bin 1 at the meshing end of the driving gear 204, a lower hopper 206 is welded at the bottom end of the feeding bin 1, sliding grooves 208 are formed in the outer side of the lower hopper 206 in a clamping manner, two folding baffles 209 are arranged on the inner side of the sliding grooves 208 in a penetrating manner;

in order to tear and crush crushed materials, a sliding frame 210 is clamped between two folding baffles 209, one end of one cutting drum 202 penetrates through a feeding bin 1 and is connected with a driving gear 204, one end of the other cutting drum 202 penetrates through the feeding bin 1 and is connected with a driven gear 205, a bolt limiter 211 is spirally embedded inside the sliding frame 210, one end of the crushing bin 207 is welded with the bolt limiter 211, a tearing bowl 213 is arranged in the middle of the crushing bin 207, two ends of the sliding frame 210 are connected with two ends of the outer side of a crushing bucket 214, the top end and the bottom end of the tearing bowl 213 are arc-shaped, the outer side of the tearing bowl 213 is clamped with a tearing groove seat 212, the bottom end of the tearing groove seat 212 is connected with a blanking pipe 215, the bottom end of the tearing bowl 213 penetrates through the blanking pipe 215 and is connected with a conveying rod 216, the inner side of the tearing groove seat 212 and the outer side of the bottom end of the tearing bowl 213 are wrapped with the crushing bucket 214, the bottom end of the conveying rod 216 is welded with a driven tooth 217, the outer side of the driven bevel tooth 217 is meshed with a driving bevel gear 218, one end of the driving bevel 218 is connected with a driving motor 219, the driving end of the driving motor 219 is connected with a driving pulley 220, the driving end of the driving cone 217 is clamped with the driving cone 217, and the outer side of the driving cone 218 is wrapped with a protection box 221;

the bottom end of the crushing bin 207 is connected with a screening mechanism 3;

the screening mechanism 3 comprises a screening bin 301, a screening disc sliding groove seat 302, a screening disc clamping seat 303, a screening disc fixing rod 304, a guide limiting frame 305, a communication window 306, a transmission gear ring 307, a half-moon gear 308, a driven belt disc 309, a belt disc limiting frame 310, a screening disc 311, a baffle 312, a collecting drawer 313 and a belt 314;

in order to screen crushed vegetables and meat, the bottom end of the crushing bin 207 is connected with a screening bin 301, four screening disc sliding groove seats 302 are arranged on the inner side of the screening bin 301 at one end, a screening disc clamping seat 303 is connected to one end surface of the screening disc sliding groove seats 302 and one end surface of the inner side of the screening bin 301, a screening disc fixing rod 304 is clamped and embedded on the inner side of the screening disc clamping seat 303 in a sliding mode, a screening disc 311 is clamped and clamped between the screening disc fixing rod 304, a baffle 312 is arranged at one end of the screening bin 301, a collecting drawer 313 is arranged on the inner side of the screening bin 301 in a sliding mode, four communication windows 306 are arranged at one end of the outer side of the screening bin 301, two guide limiting frames 305 are welded on the two ends of the outer side of the communication windows 306, four transmission toothed rings 307 are embedded on the inner side of the guide limiting frames 305 in a sliding mode, a half-moon gear 308 is meshed with the middle of the transmission toothed rings 307, a driven belt pulley 309 is connected to one end of the half-moon gear 308, a belt 314 is sleeved on the inner side of the driven belt pulley 309, a belt 219 and a driving pulley 220 is mounted on the outer side of the screening bin 301, a driving motor 219 is connected to one end of the driving motor 218, which is connected to the driving motor 220, and the driving motor 220 is connected to the driving end of the driving motor 203 through the driving motor and the driving end of the driving motor 203, and the driving motor is connected to the driving end of the driving belt 219.

The working principle and the using flow of the utility model are as follows: firstly, starting a grinding motor 203, then starting the grinding motor 203 to drive a driving gear 204 to rotate, then driving the driving gear 204 to drive a meshed driven gear 205 to rotate, driving the driving gear 204 and the driven gear 205 to rotate, driving two cutting drums 202 connected with the driving gear 204 and the driven gear 205 to rotate, then pouring vegetables or meat to be crushed into a feeding bin 1 through a feeding hopper 201, and then blocking materials by the two meshed cutting drums 202, so that the vegetables or meat which are not primarily cut can be prevented from directly falling to the next link, insufficient crushing is caused, the blocked materials can be cut by the two meshed cutting drums 202, the crushed materials can fall through meshed cutter seams, and finally fall to the next link through a discharging hopper 206, so that the crushing of the next link can be more sufficient;

the material powder falling from the discharging hopper 206 can fall into the crushing bin 207, then the transmission motor 219 is started to rotate, the transmission motor 219 can drive the driving conical toothed bar 218 to rotate at the moment, the driving conical toothed bar 218 can drive the meshed driven conical toothed bar 217 to rotate, finally the driven conical toothed bar 217 can drive the conveying rod 216 and the tearing bowl 213 at the top to rotate, the rotating tearing bowl 213 can crush the crushed material through the crushing hopper 214 wrapped at the outer side of the bottom end and the crushing hopper 214 at the inner side of the tearing groove seat 212, because a large number of metal knife tips are welded on the surface of the crushing hopper 214, the meat or vegetables can be crushed in a tearing way, and the height of the sliding frame 210 can be adjusted through the rotating bolt limiter 211, so that the height of the tearing groove seat 212 connected with the sliding frame 210 is completed, the size of fragments of the torn material is determined through adjusting the height of the tearing groove seat 212, the folding baffle 209 can prevent the slag or meat slag from being flying out through the sliding groove 208 when the sliding frame 210 is adjusted up and finally the torn vegetables or the vegetables can be crushed by continuing to fall down 215 when the vegetables are crushed;

finally, the material powder sliding off through the blanking pipe 215 can drop to the top end of the screen disc 311, the screen disc 311 is slidably clamped and embedded inside the screen disc clamping seat 303 through the screen disc fixing rod 304, so that when the screen disc 311 is conveniently taken out at any time, single-mesh vegetables or meat scraps can be conveniently screened, the transmission motor 219 rotating at that time can drive the driven belt pulley 309 through the belt 314 sleeved inside the driving belt pulley 220 to rotate, the driven belt pulley 309 drives the connected half-moon gear 308 to rotate, the half-moon gear 308 can drive the meshed transmission toothed ring 307 to rotate, the transmission toothed ring 307 can slide and displace inside the guide limiting frame 305 at that time, the screen disc clamping seat 303 connected through the communication window 306 is driven at that time, and therefore the screen disc 311 is driven inside the screen disc sliding groove 208 seat at one end inside the screen bin 301, and vegetables or meat scraps are screened according to the mesh numbers through the screen disc 311, so that classification is easier.

Finally, it should be noted that: the foregoing is merely a preferred example of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (6)

1. An efficient automatic pulverizer comprises a feeding bin (1), and is characterized in that: the bottom end of the feeding bin (1) is connected with a grinding and crushing mechanism (2);

the crushing and smashing mechanism (2) comprises a feeding hopper (201), a cutting drum (202), a crushing motor (203), a driving gear (204), a driven gear (205), a discharging hopper (206), a smashing bin (207), a sliding groove (208), a folding baffle (209), a sliding frame (210), a bolt limiter (211), a tearing groove seat (212), a tearing bowl (213), a crushing hopper (214), a discharging pipe (215), a conveying rod (216), driven bevel gears (217), a driving bevel gear rod (218), a driving motor (219), a driving belt pulley (220) and a protection box (221);

a feeding hopper (201) is arranged at the feeding end of the feeding bin (1), and two cutting drums (202) are embedded and arranged at the bottom end of the feeding hopper (201) on the inner side of the feeding bin (1);

a grinding motor (203) is arranged at the outer side of one end of the feeding bin (1), a driving gear (204) is connected with the driving end of the grinding motor (203), and a driven gear (205) is arranged on the surface of the meshing end of the driving gear (204) at the outer side of the feeding bin (1);

a discharging hopper (206) is welded at the bottom end of the feeding bin (1), two ends of the outer side of the crushing bin (207) are embedded in the outer side of the discharging hopper (206), sliding grooves (208) are formed in a penetrating manner, and two folding baffles (209) are arranged on the inner side of each sliding groove (208);

a sliding frame (210) is clamped between the two folding baffles (209), a bolt limiter (211) is welded at one end of the crushing bin (207), and a tearing pot (213) is arranged in the middle of the crushing bin (207);

the outer side of the tearing bowl (213) is embedded with a tearing groove seat (212), the bottom end of the tearing groove seat (212) is connected with a blanking pipe (215), the bottom end of the tearing bowl (213) penetrates through the blanking pipe (215) to be connected with a conveying rod (216), and the inner side of the tearing groove seat (212) and the outer side of the bottom end of the tearing bowl (213) are both wrapped with a shredding bucket (214);

driven awl tooth (217) are welded to the bottom end of conveying rod (216), initiative awl tooth pole (218) are meshed in the driven awl tooth (217) outside, initiative awl tooth pole (218) one end is connected with driving motor (219), driving motor (219) driving end is connected with driving pulley (220), driven awl tooth (217) and initiative awl tooth pole (218) outside parcel have protective box (221).

2. An efficient automatic pulverizer as defined in claim 1, wherein the outer side surfaces of the two cutting drums (202) are engaged, both ends of the carriage (210) are connected to both outer ends of the chopper (214), and both the top and bottom ends of the tearing bowl (213) are arc-shaped.

3. An efficient automatic pulverizer as defined in claim 1, wherein one end of the cutting drum (202) is connected to the driving gear (204) through the feed bin (1), and the other end of the cutting drum (202) is connected to the driven gear (205) through the feed bin (1), and the bolt limiter (211) is spirally embedded inside the carriage (210).

4. An efficient automatic pulverizer as defined in claim 1, wherein a screening mechanism (3) is connected to the bottom end of the pulverizing bin (207);

the screening mechanism (3) comprises a screening bin (301), a screening disc sliding groove seat (302), a screening disc clamping seat (303), a screening disc fixing rod (304), a guide limiting frame (305), a communication window (306), a transmission toothed ring (307), a half-moon gear (308), a driven belt pulley (309), a belt pulley limiting frame (310), a screening disc (311), a baffle plate (312), a collecting drawer (313) and a belt (314);

the bottom end of the crushing bin (207) is connected with a screening bin (301), one end of the crushing bin is provided with four screen disc sliding groove seats (302) on the inner side of the screening bin (301), and one end surface of each screen disc sliding groove seat (302) and one end surface of the inner side of the screening bin (301) are both connected with a screen disc clamping seat (303);

the inner sides of the screen disc clamping seats (303) are respectively and slidably clamped with a screen disc fixing rod (304), a screen disc (311) is clamped between the screen disc fixing rods (304), a baffle (312) is arranged at one end of the screening bin (301), and a collecting drawer (313) is slidably embedded into the inner sides of the screening bin (301) at the bottom ends of the screen discs (311);

four communication windows (306) are formed in one end of the outer side of the screening bin (301), two guide limiting frames (305) are welded at two ends of the outer side of the communication windows (306), and four transmission toothed rings (307) are embedded in the inner side of the guide limiting frames (305) in a sliding mode;

the belt pulley is characterized in that a half-moon gear (308) is meshed in the middle of the transmission toothed ring (307), one end of the half-moon gear (308) is connected with a driven belt pulley (309), a belt pulley limiting frame (310) is clamped and embedded between the half-moon gear (308) and the driven belt pulley (309), and a belt (314) is sleeved on the inner side of the driven belt pulley (309).

5. The efficient automatic pulverizer as defined in claim 4, wherein the driving motor (219) and the driving pulley (220) are mounted on the outer side surface of the screening bin (301), and one end of the driving conical toothed bar (218) penetrates through the screening bin (301) and is connected with the driving pulley (220).

6. An efficient automatic pulverizer as defined in claim 4, wherein said driving pulley (220) is connected to a plurality of driven pulleys (309) by means of a belt (314), and the power input terminals of said grinding motor (203) and said driving motor (219) are connected to the power output terminals of external control terminals.