CN212354510U - Automatic change fruit packagine machine - Google Patents

Abstract

The utility model discloses an automatic fruit packaging machine, which comprises a frame, wherein a material storage mechanism, a feeding mechanism, a cutting mechanism and a fruit discharging mechanism are arranged on the frame; the feeding mechanism conveys the mesh bags stored in the storage mechanism to a packaging position, the mesh bags are unfolded at the packaging position, the fruit discharging mechanism conveys fruits to the packaging position and sleeves the fruits into the mesh bags, and the cutting mechanism cuts off the mesh bags and then the fruits are packaged; the material storage mechanism comprises a foaming mesh bag material tray and an air expansion supporting shaft which are coaxially fixed, and the air expansion supporting shaft provides driving force through a worm gear speed reducer; a discharge port of the foaming mesh bag material tray is sequentially provided with a tensioning shaft assembly and a guide shaft assembly from top to bottom; this packagine machine can realize the automatic operation to fruit pocket packing, has improved packing efficiency, has reduced the human resource cost, and it has extensive application prospect in fruit packing field.

Description

Automatic change fruit packagine machine

Technical Field

The utility model belongs to the field of machinery, concretely relates to automatic change fruit packaging machine especially relates to an automatic fruit packaging machine with foaming pocket packing.

Background

The foaming mesh bag is a mesh bag which is formed by cutting a polyethylene extrusion foaming mesh into sections and then is sleeved on the periphery of fruits, so that the transportation safety of the fruits is protected, and the appearance grade of the fruits is improved. The operation of current going on the cover net to fruit relies on the manual work more, because the fruit surface is crisp tender, the in-process of artifical cover net is difficult to master the dynamics, leads to the fruit surface to receive external force injury easily. Meanwhile, in the busy season of fruit ripening, manual net sleeving operation brings great labor intensity, labor cost is increased, relative efficiency is low, fruit production cost is increased, and even the time for putting fruits on the market is delayed. Therefore, the fruit packaging machine for automatically packaging the foaming mesh bags has great market application prospect.

Chinese patent (application No. 201721914810.3) discloses a foam heat-sealing cutting and packaging machine for fruit packaging, which has too low material changing and packaging efficiency; the device's foam net passes through the chuck and cliies the top end opening of foam net, and is fixed in the middle part of lift seat, and the central point of lift seat puts and is provided with throws the fruit hole, and wherein throw the fruit hole and correspond with the upper end open position of foam string bag. However, the storage capacity of the foam net bag is fixed and limited, once the quantity of fruits to be packaged rises, a great time waste exists for manually replacing the foam net bag, the processing efficiency is low, and the continuous work is not facilitated.

Chinese patent (application No. 201820866606.7) discloses a portable fruit packaging machine, packaging film unloader is used for becoming the annular packaging film with plane packaging film to the conveying downwards, edge plastic envelope device is used for the vertical edge heating plastic envelope of annular packaging film, packaging film conveyer is used for conveying the packaging film at edge downwards, plastic envelope shearing mechanism is used for heating plastic envelope and making its separation with the packaging film. Although the problem of low processing efficiency caused by inconvenience of continuous packaging, dismounting and material changing is well solved, the packaging machine still has the following defects: when a single-layer film is bent into a cylindrical film, great inconvenience and uncertainty exist, and meanwhile, the problem that side opening plastic package cannot be effectively sealed or sealed in a leakage manner due to repeated plastic package possibly exists when a side opening is plastically packaged; meanwhile, no buffer device is arranged in the whole path of the fruit package, so that the fruit can penetrate through the film bag with the sealed opening after falling from the air, and certain damage is caused to the fruit.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems existing in the prior art, the utility model aims to provide an automatic fruit packaging machine can realize the automatic operation of fruit cover net packing, promotes the packaging quality and the packing efficiency of fruit.

In order to achieve the above object, the present invention provides the following technical solutions:

an automatic fruit packaging machine comprises a rack, wherein a material storage mechanism, a feeding mechanism, a cutting mechanism and a fruit discharging mechanism are arranged on the rack; the feeding mechanism conveys the mesh bags stored in the storage mechanism to a packaging position, the mesh bags are unfolded at the packaging position, the fruit discharging mechanism conveys fruits to the packaging position and sleeves the fruits into the mesh bags, and the cutting mechanism cuts off the mesh bags and then the fruits are packaged;

the material storage mechanism comprises a foaming mesh bag material tray and an air expansion supporting shaft which are coaxially fixed, and the air expansion supporting shaft provides driving force through a worm gear speed reducer; a discharge port of the foaming mesh bag material tray is sequentially provided with a tensioning shaft assembly and a guide shaft assembly from top to bottom;

the feeding mechanism comprises a conveyor belt module, a pressure rod shaft is arranged on the upper surface of the conveyor belt module, and a gap between the conveyor belt module and the pressure rod shaft is matched with the thickness of the mesh bag; the pressure rod shaft is fixed on the rack through a pressure-adjustable self-adapting device, and the pressure-adjustable self-adapting device is used for adjusting a gap between the conveyor belt module and the pressure rod shaft;

the cutting mechanism comprises a first stepping motor, an output shaft of the first stepping motor is fixedly connected with a driving gear and drives the driving gear to rotate, the driving gear is meshed with a driven gear and drives the driven gear to rotate, reverse-tooth double-ended lead screws are arranged at the centers of the driving gear and the driven gear, first sliding blocks are respectively matched with two ends of each reverse-tooth double-ended lead screw in a threaded manner, a cutting blade of a thermal cutting knife is respectively arranged on each of the two first sliding blocks close to one end of the feeding mechanism, a vacuum suction nozzle is respectively fixed on each of the two first sliding blocks of the other reverse-tooth double-ended lead screw through a vacuum suction disc frame, the two vacuum suction nozzles are close to each other in an initial state, the two cutting blades are far away from each other, and the motion directions of; a foaming mesh bag supporting plate is fixed between the two reverse-tooth double-end lead screws, a first proximity switch is arranged at one end close to the vacuum suction disc frame, and the first proximity switch controls the worm gear speed reducer, the conveyor belt module and the first stepping motor;

the fruit feeding mechanism comprises a fruit feeding assembly and a second stepping motor fixed on the rack, a second proximity switch is arranged in the fruit feeding assembly and controls the second stepping motor, and a poking device is arranged on an output shaft of the second stepping motor and used for opening the opening end of the mesh bag.

Furthermore, the tensioning shaft assemblies are arranged into an upper row and a lower row and comprise an upper tensioning shaft support and a lower tensioning shaft support which are fixed on the rack, two tensioning shafts are arranged on each tensioning shaft support side by side, and the upper and lower rows of tensioning shafts are arranged in a staggered mode.

Furthermore, the fixed shaft of the upper tensioning shaft support penetrates through the two tapered roller bearings arranged on the rack and is fixed on the rack through a torsional spring, and one end of the torsional spring is fixed on the rack, while the other end is fixed on the outer end surface of the fixed shaft of the upper tensioning shaft support, so that torsion is provided for the upper tensioning shaft support.

Furthermore, the guide shaft assembly comprises a traction shaft, the traction shaft is fixed on the rack through a bolt, a shaft sleeve is sleeved in the middle of the traction shaft, tapered roller bearings are coaxially arranged at two ends of the shaft sleeve, and the guide shaft is sleeved on the outer ring of each tapered roller bearing; the outer end face of the guide shaft is provided with a thrust bearing, and the outer side of the thrust bearing is provided with a spring buckle for restraining the guide shaft.

Further, the pressure-adjustable self-adaptive device comprises a pressure rod shaft support, the pressure rod shaft support is fixed on the rack through a pressure rod shaft support shaft, and the pressure rod shaft is fixed at the bottom of the pressure rod shaft support through a bearing; a press rod rotating shaft is rotatably arranged on the press rod shaft bracket, a spring shaft perpendicular to the press rod rotating shaft penetrates through the end part of the press rod rotating shaft, and a spring supporting shaft fixed on the rack penetrates through the end part of the spring shaft; the spring shaft between the pressure lever rotating shaft and the spring supporting shaft is sleeved with a spring, and the upper end face of the pressure lever rotating shaft is provided with a nut matched with the spring shaft.

Further, the corner angle of the strut shaft support is an obtuse angle.

Furthermore, the poking device comprises a screw rod arranged on an output shaft of a second stepping motor, a second sliding block in threaded connection is arranged on the screw rod, a third stepping motor is fixed on the upper end face of the second sliding block, a U-shaped transmission shaft support parallel to the vacuum chuck support is arranged on the side face of the second sliding block, transmission shafts are arranged on two sides and the bottom of the transmission shaft support, and transmission is realized between two adjacent transmission shafts through a group of bevel gears; and a pair of poking plates facing the cutting mechanism are arranged at two ends of the U-shaped transmission shaft support.

Furthermore, the photoelectric sensing switch controls a third stepping motor, the poking plate is fixedly connected to the poking plate supports, and the two poking plate supports are respectively connected with the two vertical transmission shafts.

Furthermore, the two vacuum suction nozzles are respectively connected to the air pump through air pipes.

Has the advantages that: the utility model provides an automatic change fruit packagine machine, this packagine machine has following advantage:

1. the automatic control of a series of actions of packing fruits into boxes is realized by using a mechanical structure and matching with an electric element, so that the damage to people is reduced, and the working efficiency is improved;

2. the foaming mesh bags are preliminarily arranged by reasonably arranging the arrangement positions of the tensioning shafts, and meanwhile, sufficient foaming mesh bag amount is reserved to avoid the sudden increase of the fruit packaging amount, so that a certain buffering effect is achieved to protect the stable operation of the device;

3. the precise control of each fruit package is realized through the effective cooperation of the two proximity switches;

4. the two meshed gears respectively drive the two anti-tooth double-end screw rods, so that the effective control of the cooperative operation of the four mechanical devices driven by the single motor is realized, and the working efficiency is maximized;

5. through set up the adjustable self-adaptation device of pressure in pressure lever axle part position department, the control of control pressure lever axle and hold-in range module interval size that can be fine to provide sufficient pressure through the spring, guarantee foaming mesh bag's normal transport, fruit package's orderly work.

Drawings

Fig. 1 is a schematic structural view of the automatic fruit packing machine of the present invention.

Fig. 2 is a front view of the automatic fruit packing machine of the present invention.

Fig. 3 is a front side view of the automatic fruit packing machine of the present invention.

Fig. 4 is a rear side view of the automatic fruit packing machine of the present invention.

Fig. 5 is a partially enlarged view of a portion a in fig. 3.

Fig. 6 is a partially enlarged view of fig. 4 at B.

Fig. 7 is a circuit control diagram of the automatic fruit packing machine of the present invention.

Fig. 8 is an enlarged view of a portion of an automated fruit wrapping machine at C.

Fig. 9 is a partial enlarged view of fig. 1 at D.

Fig. 10 is a sectional view taken at E of fig. 2.

In the figure: 101. a foaming mesh bag material tray; 102. an air expansion supporting shaft; 103. tensioning the shaft; 104. a shaft sleeve; 105. a guide shaft; 106. A thrust bearing; 107. a spring buckle; 108. a worm gear reducer; 109. a fourth stepping motor; 110. an upper tension shaft bracket; 111. a lower tension shaft bracket; 112. a fifth stepping motor; 113. a torsion spring; 114. a traction shaft; 201. 202, a pressure lever shaft support shaft; 203. a conveyor belt module; 204. a pressure bar shaft; 205. a spring shaft; 206. a spring supporting shaft; 207. a spring; 208. a pressure lever rotating shaft; 209. a nut; 210. a bearing; 301. a hot cutter; 302. a driving gear; 303. a reverse-tooth double-end screw rod; 304. a vacuum chuck support; 305. a foaming mesh bag supporting plate; 306. a vacuum nozzle; 307. pulling the plate open; 308. pulling the plate bracket open; 309. a vertical drive shaft; 310. a transmission shaft support; 311. a horizontal transmission shaft; 312. a bevel gear; 313. a fruit box; 314. a second stepping motor; 315. a second motor fixing bracket; 316. a first motor fixing bracket; 317. a second slider; 318. a screw rod; 319. a third step motor; 320. A bearing seat; 321. a slide rail; 322. a first slider; 323. a first stepper motor; 401. Discharging a fruit tube; 402. a fruit tube bracket; 403. a tapered sleeve; 501. an air pump; 502. an air tube; 503. a second proximity switch; 504. a first proximity switch; 505. a photoelectric sensing switch; 601. a section bar frame; 602. and a support plate.

Detailed Description

The present invention is further described below with reference to specific examples, which are only exemplary and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

An automatic fruit packaging machine, as shown in the attached figure, comprises a frame, a supporting plate and a driving device, wherein the frame comprises a section bar frame 601 and a supporting plate 602 which is perpendicular to one side of the section bar frame; the rack is provided with a material storage mechanism, a feeding mechanism, a cutting mechanism and a fruit discharging mechanism; the feeding mechanism conveys the mesh bags stored in the storage mechanism to a packaging position, the mesh bags are unfolded at the packaging position, the fruit discharging mechanism conveys fruits to the packaging position and sleeves the fruits into the mesh bags, and the cutting mechanism cuts off the mesh bags and then the fruits are packaged;

the material storage mechanism comprises a foaming mesh bag material tray 101 and an air expansion supporting shaft 102 which are coaxially fixed, the air expansion supporting shaft 102 provides driving force through a worm gear speed reducer 108, and the worm gear speed reducer 108 is matched with a fourth stepping motor 109; when the materials in the foaming mesh bag material tray 101 are used up, the foaming mesh bag material tray 101 can be easily taken down and replaced by a new material tray by deflating the inflatable supporting shaft 102 to be smaller;

a discharge port of the foaming mesh bag material tray is sequentially provided with a tensioning shaft assembly and a guide shaft assembly from top to bottom;

the tensioning shaft assembly is arranged into an upper row and a lower row, and comprises an upper tensioning shaft support 110 and a lower tensioning shaft support 111 which are fixed on the supporting plate 602, two tensioning shafts 103 are arranged on each tensioning shaft support side by side, the upper tensioning shaft and the lower tensioning shaft are arranged in a staggered manner, the upper tensioning shaft and the lower tensioning shaft can move downwards along the upper tensioning shaft and the lower tensioning shaft respectively by the two rows of tensioning shafts which are arranged in a staggered manner, the foaming mesh bag is ensured to be always in a tensioning state, when the supply of the foaming mesh bag is increased suddenly, the two rows of tensioning shafts can contract inwards, and the stable operation of the device is ensured by a certain buffering effect.

The fixed shaft of the upper tension shaft bracket 110 passes through two tapered roller bearings provided on the support plate 602 and is fixed to the support plate 602 by a torsion spring 113, one end of the torsion spring 113 is fixed to the support plate 602 and the other end is fixed to the outer end surface of the fixed shaft of the upper tension shaft bracket 110 (fig. 6). The foamed mesh bag put down from the foamed mesh bag tray 101 passes by the tension shaft 103 in an S-shaped track and then enters the feeding mechanism from the outer side of the guide shaft 105 in a winding manner as shown in FIG. 2. The tensioning shaft assembly is used for leveling the mesh bag, and meanwhile, certain mesh bag allowance can be stored to deal with sudden change of the packaging speed.

The guide shaft assembly comprises a traction shaft 114, the traction shaft 114 is fixed on a support plate 602 through a bolt, a shaft sleeve 104 is sleeved in the middle of the traction shaft 114, and the shaft sleeve 104 plays a role in restraining axial movement of the tapered roller bearing; tapered roller bearings are coaxially arranged at two ends of the shaft sleeve 104, a guide shaft 105 is sleeved on an outer ring of each tapered roller bearing, and the tapered roller bearings play a role in reducing the motion friction of the guide shaft 105; the outer end face of the guide shaft 105 is provided with a thrust bearing 106, and the outer side of the thrust bearing 106 is provided with a spring catch 107 for restraining the guide shaft 105.

The feeding mechanism comprises a conveyor belt module 203, and the conveyor belt module 203 is driven by a fifth stepping motor 112; a pressure rod shaft 204 is arranged on the upper surface of the conveyor belt module 203, and the gap between the conveyor belt module 203 and the pressure rod shaft 204 is matched with the thickness of the mesh bag; the pressure rod shaft 204 is fixed on the support plate 602 through a pressure-adjustable self-adapting device, and the pressure-adjustable self-adapting device is used for adjusting a gap between the conveyor belt module 203 and the pressure rod shaft 204 so as to be suitable for foaming mesh bags with different thicknesses, and particularly can provide a pressure free transformation interval within a certain range interval under a normal working state;

as shown in fig. 5, the pressure-adjustable adaptive device includes a strut shaft bracket 201, and a corner angle of the strut shaft bracket 201 is an obtuse angle; the pressure rod shaft bracket 201 is fixed on a support plate 602 through a pressure rod shaft support shaft 202, and the pressure rod shaft 204 is fixed at the bottom of the pressure rod shaft bracket 201 through a bearing 210; a pressure lever rotating shaft 208 is rotatably arranged on the pressure lever shaft bracket 201, a spring shaft 205 perpendicular to the pressure lever rotating shaft is arranged at the end of the pressure lever rotating shaft 208 in a penetrating manner, and a spring supporting shaft 206 fixed on a supporting plate 602 is arranged at the end of the spring shaft 205 in a penetrating manner; a spring 207 is sleeved on the spring shaft 205 between the compression bar rotating shaft 208 and the spring supporting shaft 206; the upper end surface of the pressure bar rotating shaft 208 is provided with a nut 209 which is matched with the spring shaft 205, the control of the gap between the pressure bar shaft 204 and the conveyor belt module 203 can be realized by the up-and-down movement of the nut 209, and the spring 207 is used for providing enough pressure.

The cutting mechanism comprises a first stepping motor 323, and the first stepping motor 323 is fixed on the supporting plate 602 through a first motor fixing bracket 316; an output shaft of the first stepping motor 323 is fixedly connected with the driving gear 302 and drives the driving gear 302 to rotate, the driving gear 302 is meshed with the driven gear and drives the driven gear to rotate, and the centers of the driving gear 302 and the driven gear are both provided with a reverse-tooth double-thread screw rod 303, namely, the thread directions of two ends are opposite; the two ends of each inverted-tooth double-headed screw 303 are respectively in threaded fit with a first sliding block 322, the first sliding blocks on the two inverted-tooth double-headed screws 303 are matched with the sliding rails 321, and the sliding rails 321 are used for limiting the first sliding blocks to move up and down on the inverted-tooth double-headed screws 303 without axial rotation in the rotating process of the inverted-tooth double-headed screws 303, so that the stability and reliability of the first sliding blocks in the moving process are improved; two first sliding blocks 322 close to one end of the feeding mechanism are respectively provided with a cutting blade of the heat cutting knife 301, two first sliding blocks of the other reverse tooth double-head screw rod are respectively fixed with a vacuum suction nozzle 306 through a vacuum suction disc rack 304, the two vacuum suction nozzles 306 are respectively connected to an air pump 501 through an air pipe 502, and the reverse tooth double-head screw rod 303 can simultaneously control the heat cutting knife or the vacuum suction disc rack to open or close; in the initial state, the two vacuum suction nozzles 306 are close to each other, the two cutting blades are far away from each other, and the two vacuum suction nozzles and the two cutting blades move in opposite directions, so that the vacuum suction nozzles and the hot cutter are in an open and closed position relation. Under operating condition, when the vacuum suction nozzle sucks the mesh bag to open, the hot cutter cuts off the mesh bag and plugs up the rear end of the mesh bag, so that the phenomenon that the placed fruits directly slide out of the rear end of the mesh bag and packaging is invalid is avoided.

A foaming mesh bag supporting plate 305 is fixed between the two reverse-tooth double-end screw rods 303 to provide lifting force for the foaming mesh bag, the inclination angle range of the upper end surface of the foaming mesh bag supporting plate 305 is not less than 10 degrees and not more than 30 degrees, and the foaming mesh bag supporting plate inclines towards the vacuum chuck frame side, so that packaged fruits can conveniently slide into the fruit box; a first proximity switch 504 is arranged at one end close to the vacuum chuck holder 304, and the first proximity switch 504 controls the worm gear reducer 108, the conveyor belt module 203 and the first stepping motor 323;

the fruit feeding mechanism comprises a fruit feeding assembly and a second stepping motor 314 fixed on the supporting plate 602, the second stepping motor 314 is fixed on the supporting plate 602 through a second motor fixing support 315, a second proximity switch 503 is arranged in the fruit feeding assembly, the second proximity switch 503 controls the second stepping motor 314, and an output shaft of the second stepping motor 314 is provided with a poking device which is used for opening the opening end of the mesh bag.

As shown in fig. 9, the poking device comprises a screw rod 318 arranged on the output shaft of the second stepping motor 314, and the screw rod 318 is fixed on the frame through a bearing block 320; the screw rod 318 is provided with a second sliding block 317 in threaded connection, the upper end surface of the second sliding block 317 is fixed with a third stepping motor 319, the side surface of the second sliding block 317 is provided with a U-shaped transmission shaft bracket 310 parallel to the vacuum chuck frame 304, two sides and the bottom of the transmission shaft bracket 310 are provided with transmission shafts which comprise two vertical transmission shafts 309 and a horizontal transmission shaft 311, transmission is realized between two adjacent transmission shafts through a group of bevel gears 312, a group of bevel gears 312 are arranged between the output shaft of the third stepping motor 319 and the vertical transmission shaft close to the output shaft, the three groups of bevel gears 312 are arranged in total, and the three groups of bevel gears 312 are driven by one stepping motor, so that the control effects that two structures move simultaneously and the movement speeds are; two ends of the U-shaped transmission shaft bracket 310 are provided with a pair of pulling plates 307 facing the cutting mechanism, the pulling plates 307 are arc-shaped structures, and the two pulling plates 307 are respectively fixed at two ends of the U-shaped transmission shaft bracket 310 through the pulling plate bracket.

As shown in fig. 3, the lower fruit assembly comprises a lower fruit tube 401, the lower fruit tube 401 is fixed on a supporting plate 602 through a fruit tube bracket 402, and the top of the lower fruit tube 401 is provided with a tapered sleeve 403. The fruit discharging pipe 401 is provided with a port facing the cutting assembly, the fruit discharging port is provided with a photoelectric sensing switch 505, and the photoelectric sensing switch 505 controls a third stepping motor 319; the bottom of the fruit outlet port is provided with a fruit box 313.

Fruit packagine machine's working process and principle as follows:

(1) the material storage mechanism comprises a foaming mesh bag material tray 101 and an air expansion supporting shaft 102 which are coaxially fixed, the air expansion supporting shaft 102 provides driving force through a worm gear speed reducer 108, a foaming mesh bag put down from the foaming mesh bag material tray 101 bypasses a tensioning shaft 103 in an S-shaped track, then enters a conveyor belt module 203 from the outer side of a guide shaft 105, and the foaming mesh bag after being tensioned and shaped through the tensioning shaft 105 is level and standard;

(2) the foaming mesh bag continues to move forwards through the transportation of the conveyor belt module 203, and a pressure rod shaft 204 is arranged above the conveyor belt module 203 to provide enough friction force for the movement of the foaming mesh bag;

(3) the foaming mesh bag slides out of the feeding mechanism and is conveyed forwards continuously, when the foaming mesh bag reaches a corresponding position, the first proximity switch 504 controls the foaming mesh bag material tray 101 and the conveyor belt module 203 to stop working, and controls the first stepping motor 323 to rotate to drive the two meshed gears to rotate at the same time, the first sliding block slides on the reverse-tooth double-head screw rod to drive the vacuum suction nozzle 306 to suck the foaming mesh bag and pull the foaming mesh bag to the two ends, and meanwhile, the heat cutting knife is driven to cut and separate the foaming mesh bag connected together into two parts;

(4) when fruits pass through the lower fruit pipe 401, a second proximity switch arranged in the lower fruit pipe 401 can also detect the fruits, and can drive the second stepping motor 314 to rotate forwards to drive the poking device to move forwards integrally, and drive the third stepping motor 319 to move to drive the whole poking device to move after reaching a corresponding position, so that the front end opening of the foaming mesh bag is supported to the most appropriate state, the fruits can conveniently enter the foaming mesh bag, whether the feeding work of the fruits is finished or not is sensed through the photoelectric sensing switch 505, if the feeding work is finished, the third stepping motor 319 moves backwards to drive the whole poking device to move backwards, the fruits can conveniently fall into the fruit box 313 arranged below the packaging machine, and if a second fruit falls into the lower fruit pipe 401, the operation is repeated, so that the fruit packaging can be finished.

Claims (9)

1. An automatic fruit packaging machine is characterized by comprising a rack, wherein a material storage mechanism, a feeding mechanism, a cutting mechanism and a fruit discharging mechanism are arranged on the rack; the feeding mechanism conveys the mesh bags stored in the storage mechanism to a packaging position, the mesh bags are unfolded at the packaging position, the fruit discharging mechanism conveys fruits to the packaging position and sleeves the fruits into the mesh bags, and the cutting mechanism cuts off the mesh bags and then the fruits are packaged;

the material storage mechanism comprises a foaming mesh bag material tray (101) and an air expansion supporting shaft (102) which are coaxially fixed, and the air expansion supporting shaft (102) provides driving force through a worm gear speed reducer (108); a discharge port of the foaming mesh bag material tray is sequentially provided with a tensioning shaft assembly and a guide shaft assembly from top to bottom;

the feeding mechanism comprises a conveyor belt module (203), a pressure rod shaft (204) is arranged on the upper surface of the conveyor belt module (203), and a gap between the conveyor belt module (203) and the pressure rod shaft (204) is matched with the thickness of the mesh bag; the pressure rod shaft (204) is fixed on the frame through a pressure adjustable self-adapting device, and the pressure adjustable self-adapting device is used for adjusting the gap between the conveyor belt module (203) and the pressure rod shaft (204);

the cutting mechanism comprises a first stepping motor (323), an output shaft of the first stepping motor (323) is fixedly connected with a driving gear (302) and drives the driving gear (302) to rotate, the driving gear (302) is meshed with a driven gear and drives the driven gear to rotate, and the centers of the driving gear (302) and the driven gear are both provided with a reverse-tooth double-head screw rod (303); two ends of each anti-tooth double-head screw rod (303) are respectively in threaded fit with a first sliding block (322), two first sliding blocks (322) close to one end of the feeding mechanism are respectively provided with a cutting blade of the hot cutting knife (301), two first sliding blocks of the other anti-tooth double-head screw rod are respectively fixed with a vacuum suction nozzle (306) through a vacuum suction disc frame (304), when the feeding mechanism is in an initial state, the two vacuum suction nozzles (306) are close to each other, the two cutting blades are far away from each other, and the two vacuum suction nozzles and the two cutting blades are opposite in moving direction; a foaming mesh bag supporting plate (305) is fixed between the two reverse-tooth double-end screw rods (303), a first proximity switch (504) is arranged at one end close to the vacuum suction cup frame (304), and the first proximity switch (504) controls a worm gear speed reducer (108), a conveyor belt module (203) and a first stepping motor (323);

the fruit feeding mechanism comprises a fruit feeding assembly and a second stepping motor (314) fixed on the rack, a second proximity switch (503) is arranged in the fruit feeding assembly, the second proximity switch (503) controls the second stepping motor (314), a poking device is arranged on an output shaft of the second stepping motor (314), and the poking device is used for opening the opening end of the mesh bag.

2. An automated fruit wrapping machine according to claim 1 wherein said tension shaft assemblies are arranged in upper and lower rows, and comprise an upper tension shaft support (110) and a lower tension shaft support (111) fixed to the machine frame, each tension shaft support having two tension shafts (103) arranged side by side, the upper and lower rows of tension shafts being staggered.

3. The automatic fruit packing machine as claimed in claim 2, wherein the fixed shaft of the upper tension shaft bracket (110) passes through two tapered roller bearings arranged on the frame and is fixed on the frame by a torsion spring (113), one end of the torsion spring (113) is fixed on the frame, and the other end is fixed on the outer end face of the fixed shaft of the upper tension shaft bracket (110) to provide a torsion force for the upper tension shaft bracket (110).

4. The automatic fruit packaging machine according to claim 1, wherein the guide shaft assembly comprises a traction shaft (114), the traction shaft (114) is fixed on a rack through a bolt, a shaft sleeve (104) is sleeved in the middle of the traction shaft (114), tapered roller bearings are coaxially arranged at two ends of the shaft sleeve (104), and a guide shaft (105) is sleeved on the outer rings of the tapered roller bearings; the outer end face of the guide shaft (105) is provided with a thrust bearing (106), and the outer side of the thrust bearing (106) is provided with a spring buckle (107) for restraining the guide shaft (105).

5. The automated fruit packaging machine according to claim 1, wherein the pressure-adjustable adaptive device comprises a pressure lever shaft support (201), the pressure lever shaft support (201) is fixed on the rack through a pressure lever shaft support shaft (202), and the pressure lever shaft (204) is fixed on the bottom of the pressure lever shaft support (201) through a bearing (210); a pressure lever rotating shaft (208) is rotatably arranged on the pressure lever shaft support (201), a spring shaft (205) perpendicular to the pressure lever rotating shaft penetrates through the end part of the pressure lever rotating shaft (208), and a spring supporting shaft (206) fixed on the rack penetrates through the end part of the spring shaft (205) perpendicularly; the spring shaft (205) between the pressure lever rotating shaft (208) and the spring supporting shaft (206) is sleeved with a spring (207), and the upper end face of the pressure lever rotating shaft (208) is provided with a nut (209) matched with the spring shaft (205).

6. An automated fruit wrapping machine according to claim 5 wherein the corner angle of the strut shaft support (201) is obtuse.

7. The automatic fruit packing machine according to claim 1, wherein the poking device comprises a screw rod (318) arranged at an output shaft of the second stepping motor (314), a second sliding block (317) in threaded connection is arranged on the screw rod (318), a third stepping motor (319) is fixed at the upper end face of the second sliding block (317), a U-shaped transmission shaft bracket (310) parallel to the vacuum chuck bracket (304) is arranged at the side face of the second sliding block (317), transmission shafts are arranged at two sides and at the bottom of the transmission shaft bracket (310), and transmission is realized between two adjacent transmission shafts through a group of bevel gears (312); two ends of the U-shaped transmission shaft support (310) are provided with a pair of poking plates (307) facing the cutting mechanism, the poking plates (307) are fixedly connected to the poking plate support (308), and the two poking plate supports (308) are respectively connected with the two vertical transmission shafts (309).

8. The automated fruit packaging machine according to claim 7, wherein the fruit outlet of the fruit feeding assembly is provided with a photo-electric switch (505), the photo-electric switch (505) controlling the third stepping motor (319).

9. An automated fruit packaging machine according to claim 1, wherein the two vacuum nozzles (306) are each connected to an air pump (501) via an air tube (502).

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