CN109911266B

CN109911266B - Automatic weighing and subpackaging device

Info

Publication number: CN109911266B
Application number: CN201910211602.4A
Authority: CN
Inventors: 王洪伟
Original assignee: Rizhao Fangyuan Machinery Technology Co Ltd
Current assignee: Shenzhen Keerda Intelligent Equipment Co ltd
Priority date: 2017-08-24
Filing date: 2017-08-24
Publication date: 2020-12-08
Anticipated expiration: 2037-08-24
Also published as: CN109747877B; CN109911264B; CN109911265B; CN109911266A; CN109911265A; CN109747877A; CN107499546A; CN109911264A; CN107499546B

Abstract

The invention discloses an automatic weighing and subpackaging device, which belongs to the field of subpackaging machinery and is characterized in that: comprises a frame body, a blanking hopper, a bucket conveyor and a weighing assembly; the rear end of the discharging hopper is provided with an opening, the rear end or the position close to the rear of the discharging hopper is hinged with the frame body, the discharging hopper is high in front and low in rear, and a supporting spring is arranged below the front end of the discharging hopper; the bucket conveyor is positioned below the opening of the lower hopper and comprises a traction chain, a small hopper, a head wheel, a tail wheel, a ratchet wheel and a connecting plate; the head wheel and the tail wheel are arranged on the connecting plate through wheel shafts, the tail wheel is positioned behind and below the head wheel, the traction chain is wound on the head wheel and the tail wheel, and the small hopper is fixed on the periphery of the traction chain; the axial side edges of the head wheel and the tail wheel are respectively fixedly connected with a first ratchet wheel and a second ratchet wheel, and a spring piece is fixedly connected to the blanking hopper; the weighing assembly comprises a weighing device. Compared with the prior art have the convenient accurate characteristics of partial shipment.

Description

Automatic weighing and subpackaging device

Technical Field

The invention discloses divisional application of patent application 'an automatic material subpackaging device' (application number: 2017107326227), relates to a packaging machine, and particularly relates to an automatic weighing and subpackaging device.

Background

In order to facilitate the operations of processing, selling, using, transporting and the like of subsequent processes, the bulk materials are often required to be packaged in bags, boxes or other forms, and in the process, the bulk materials are firstly required to be uniformly distributed according to the weight. Present material partial shipment includes artifical partial shipment and mechanical partial shipment dual mode, and traditional artifical partial shipment is wasted time and energy, and the material can lead to the fact the impact force to the partial shipment dish when falling to the partial shipment dish in the mechanical partial shipment, and this impact force can cause the interference to the weighing process. In order to be able to make the weight accurate, it is common practice to measure the magnitude of this impact force experimentally and then add the magnitude of this impact force to the actual weight when the weighing device sets the weight, so that the error can be corrected. In the actual process, the falling speed of the materials is not uniform, and the impact force is not uniform, so that the subpackaging weight is inaccurate and uneven. Therefore, the important condition for accurately weighing the weight of the steel plate is to ensure the uniform blanking speed.

Disclosure of Invention

The technical task of the invention is to provide an automatic weighing and subpackaging device aiming at the defects of the prior art.

The technical scheme for solving the technical problem is as follows: an automatic weighing and subpackaging device comprises a frame body, a feeding hopper and a weighing and subpackaging assembly; the method is characterized in that: also comprises a bucket conveyor; the rear end of the discharging hopper is provided with an opening, the rear end or the position close to the rear of the discharging hopper is hinged with the frame body, the discharging hopper is high in front and low in rear, a supporting spring is arranged below the front end of the discharging hopper, the upper end of the supporting spring is propped against the discharging hopper, and the lower end of the supporting spring is fixed on the frame body; the bucket conveyor is positioned below the opening of the lower hopper and comprises a traction chain, a small hopper, a head wheel, a tail wheel, a ratchet wheel and a connecting plate; the head wheel and the tail wheel are arranged on the connecting plate through wheel shafts, the tail wheel is positioned behind and below the head wheel, the traction chain is wound on the head wheel and the tail wheel, and the small hopper is fixed on the periphery of the traction chain; the axial side edges of the head wheel and the tail wheel are respectively and fixedly connected with a first ratchet wheel and a second ratchet wheel, a spring piece is fixedly connected to the blanking hopper, and one end of the spring piece is pressed on the first ratchet wheel; the small hopper comprises a hopper rod, a hopper body and a tail hook, the middle position of the hopper rod is hinged with the traction chain, the hopper body is positioned at one end of the hopper rod, and the end is positioned on the hopper rod and faces the moving direction of the traction chain; the tail hook is positioned on the side edge of the other end of the hopper rod, faces to a connecting plate of the bucket conveyor and is positioned on the plane of the connecting plate; the part of the traction chain, which is hinged with the hopper rod, is of a structure protruding outwards on the traction chain, and a torsional spring is arranged at the hinged part of the hopper rod; a stop block is fixedly arranged at the upper end of the connecting plate and is positioned on a path through which the tail hook of the small hopper passes; the weighing assembly is positioned below the bucket conveyor and comprises a first tray placing frame, a second tray placing frame, a first cross beam, a second cross beam and a third cross beam; the first tray placing frame and the second tray placing frame are fixed on the frame body; the first tray placing frame, the second tray placing frame and the first cross beam are obliquely placed, the front part is high, the rear part is low, the first cross beam is positioned behind the first tray placing frame, the front end of the first cross beam is close to the rear end of the first tray placing frame, the middle position of the first cross beam is hinged with the frame body, the front end of the first cross beam is provided with a tray blocking device, the tray blocking device comprises two stand columns and a first baffle plate, the two stand columns are fixedly arranged on two sides of the front end of the first cross beam, the left end and the right end of the first baffle plate are respectively fixedly arranged on the upper ends of the two stand columns, and the lower edge of the first baffle plate is slightly higher than the height of the subpackaging tray; the side edge of the rear end or the position close to the rear end of the first cross beam is fixedly connected with a stop lever, and the upper end of the stop lever is close to the second ratchet wheel; the rear end of the first cross beam is placed on the second cross beam; the front end of the second cross beam is hinged with the frame body, a torsional spring is arranged at the hinged position, the first cross beam is connected with the second cross beam through a connecting rod, the upper end and the lower end of the connecting rod are respectively hinged with the first cross beam and the second cross beam, and the hinged position of the connecting rod and the first cross beam is positioned in front of the hinged position of the first cross beam and the frame body; the third cross beam is positioned behind the second cross beam, the rear end of the second cross beam is provided with a horizontal blind hole, a horizontal rod and a cross beam spring are arranged in the horizontal blind hole, the cross beam spring is positioned in front of the horizontal rod, and the rear end of the horizontal rod is positioned at the front end of the third cross beam; an inclined plane is arranged above the rear end of the horizontal rod or below the front end of the third cross beam; the middle position of the third cross beam is hinged with the vertical supporting rod, the lower end of the supporting rod is fixed on the frame body, the upper end of the supporting rod is fixedly connected with a second baffle plate, and the second baffle plate is positioned above the rear end of the second cross beam; the rear section of the third cross beam is provided with a sliding block, the lower side surface of the third cross beam is provided with teeth to form a rack structure, the sliding block is provided with a worm meshed with the rack, the sliding block is of a hollow structure, the worm is positioned in a middle cavity of the sliding block, and the worm is rotatably connected with the sliding block through worm shafts at two ends; the second tray placing frame is positioned below the third cross beam.

Compared with the prior art, the invention has the following outstanding beneficial effects:

1. the invention can realize the automatic weighing and subpackaging of materials;

2. the impact force of the materials on the packing tray is uniform, so that the materials can be accurately weighed;

3. the power-saving energy-saving environment-friendly energy-saving energy-.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 4 is a partially enlarged schematic view of fig. 3 at B.

Fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 6 is a schematic structural diagram of embodiment 4 of the present invention.

Fig. 7 is a schematic structural view of embodiment 5 of the present invention.

Detailed Description

The invention is further described with reference to the drawings and the detailed description. For convenience of description, the opening direction of the lower hopper 2 is set to be rear, and the opposite direction is set to be front.

In embodiment 1, as shown in fig. 1 and 2, the invention comprises a frame body, a lower hopper 2, a bucket conveyor and a weighing assembly. The frame structure has been partially omitted in the drawings for the convenience of showing the internal structure, and only the portions connected with other structures are drawn, i.e., hatched lines (except hatching lines) in the drawings. The frame body structure is used for supporting, connecting and fixing other structures, and the specific structure of the frame body is determined by the positions and the sizes of the other structures and does not influence the working principle of the invention, so the specific structure of the frame body is not described in detail.

2 rear end openings of lower hopper, 2 rear ends of lower hopper or lean on the position of back and support body to articulate mutually, lower hopper 2 high back before, be equipped with supporting spring 1 below 2 front ends of lower hopper, supporting spring 1 upper end pushes up on lower hopper 2, the lower extreme is fixed on the support body. When more materials are in the lower hopper 2, the blanking speed is higher, and the compression amount of the supporting spring 1 is larger, so that the lower hopper 2 tends to be horizontal and the falling speed of the materials can be reduced; when the material in the lower hopper 2 is less, the blanking speed is lower, the compression amount of the supporting spring 1 is smaller, the inclination angle of the lower hopper 2 is larger, the falling speed of the material can be accelerated, and the material blanking speed can be uniform under the action of the supporting spring 1.

The bucket conveyor is positioned below the opening of the lower hopper 2 and comprises a drag chain 7, a small hopper 8, a head wheel 5, a tail wheel 10, a ratchet wheel and a connecting plate 6. The head wheel 5 and the tail wheel 10 are arranged on the connecting plate 6 through wheel shafts, the tail wheel 10 is arranged behind and below the head wheel 5, the traction chain 7 is wound on the head wheel 5 and the tail wheel 10 to realize the linkage in the same direction, and the small hopper 8 is fixed on the periphery of the traction chain 7. When the materials fall onto the small hopper 8, the bucket conveyor is driven to rotate clockwise in the figure under the action of the gravity of the materials. The axial side edges of the head wheel 5 and the tail wheel 10 are respectively fixedly connected with a first ratchet wheel 4 and a second ratchet wheel 9, wherein the lower hopper 2 is fixedly connected with a spring piece 3, one end of the spring piece 3 is pressed on the first ratchet wheel 4, when the first ratchet wheel 4 rotates along with the head wheel 5, the spring piece 3 is stirred by the ratchet of the first ratchet wheel 4, the lower hopper 2 is vibrated through the spring piece 3, and the lower hopper 2 can be assisted to discharge through the vibration. Sometimes the material can take place to pile up and can not initiatively fall in hopper 2 down, can help the material whereabouts through the vibration effect, because hopper 2 can vibrate down for every time a ratchet 4 rotates a check, consequently the unloading speed is directly proportional with the conveyer rotation speed to can guarantee on the conveyer that the material volume in every small hopper 8 can be generally even unanimous.

As shown in fig. 2, the small hopper 8 includes a hopper rod 24, a hopper body 25 and a tail hook 23, the hopper rod 24 is hinged to the drag chain 7 at a middle position, the hopper body 25 is located at one end of the hopper rod 24, and the end is located on the hopper rod 24 and faces the moving direction of the drag chain 7. The tail hook 23 is positioned at the side of the other end of the hopper rod 24, the tail hook 23 faces the connecting plate 6 of the bucket conveyor, and the tail hook 23 is positioned on the plane of the connecting plate 6. The part hinged with the hopper rod 24 on the traction chain 7 is a structure that the part 7 on the traction chain protrudes outwards, the outward direction in the section refers to the direction of the small hopper 8 relative to the traction chain 7, the hinged part of the hopper rod 24 is provided with a torsion spring, and the hopper body end of the hopper rod 24 is tilted outwards under the action of the torsion spring. The upper end of the connecting plate 6 is fixedly provided with a stop block 39, the stop block 39 is positioned on a path through which the tail hook 23 of the small hopper 8 passes, so that the tail hook 23 can be stopped to prevent the traction chain 7 from rotating, and the small hopper 8 stopped by the stop block 39 is positioned below the rear end opening of the lower hopper to receive materials falling out of the lower hopper.

The material from the opening of the lower hopper 2 falls into the hopper body 25, when the material in the hopper body 25 exceeds a certain amount, the acting force generated by the weight of the material is larger than the acting force of the torsion spring of the hopper rod 24, so that the end of the hopper body 25 is pressed down, the end of the tail hook 23 is lifted up (as shown by a two-dot chain line part in fig. 2), under the action of the gravity of the material, the traction chain 7 is driven to rotate, the hopper body 25 filled with the material moves downwards, and the next empty small hopper 8 moves to the opening of the lower hopper 2. So that it is possible to ensure that the weight of the material in each small hopper 8 is substantially equal. Because the materials in each small hopper 8 are equal, when the materials in the small hoppers 8 fall into the sub-tray 22, the impact force of the materials in each small hopper 8 on the sub-tray 22 is equal, so that the impact force of the materials on the sub-tray 22 is uniform. Since the weighing assembly detects that the weight of the racking tray 22 = the weight of the racking tray 22 itself + the weight of the material + the impact force of the material on the racking tray 22, also the actual weight of the material in the racking tray 22 before racking = the weight set by the weighing device-the weight of the racking tray 22 itself-the impact force of the material on the racking tray 22, after the impact force remains stable, the required material can be accurately weighed by performing appropriate weight setting on the weighing device.

The weighing assembly includes a weighing device, i.e. a device with a weighing function, which in this embodiment is a scale 40. When the full-automatic split charging tray is used, a worker observes the display numerical value of the scale, and when the display numerical value of the scale reaches the set weight (namely the weight of the split charging tray 22, the weight of the materials and the impact force of the materials on the split charging tray 22), the full split charging tray 22 is moved away, and a new split charging tray 22 is replaced.

The embodiment is suitable for small-scale subpackaging and is suitable for small and medium-sized enterprises.

In embodiment 2, as shown in fig. 3 and 4, the present embodiment includes a frame body, a lower hopper 2, a bucket conveyor, and a weighing assembly. The structure and connection relationship of the lower hopper 2, the bucket conveyor and the accessories thereof are the same as those of embodiment 1, and the description thereof will not be repeated. The frame structure is adapted in accordance with changes in the structure of the assembly. The difference between this embodiment and embodiment 1 is mainly the change of the assembly.

The weighing assembly is positioned below the bucket conveyor and comprises a first tray placing frame 21, a second tray placing frame 13, a first cross beam 17, a second cross beam 15 and a third cross beam 14. The first tray placing frame 21 and the second tray placing frame 13 are fixed on the frame body (or can be a part of the frame body). The first tray placing frame 21, the second tray placing frame 13 and the first beam 17 are obliquely placed, the front part is high, the rear part is low, the first tray placing frame 21 is used for placing an air separation tray 22, the first beam 17 is positioned at the rear part of the first tray placing frame 21, the front end of the first beam 17 is close to the rear end of the first tray placing frame 21, the middle position of the first beam 17 is hinged with the frame body, the front end of the first beam 17 is provided with a tray blocking device, the tray blocking device comprises two upright posts 19 and a first baffle plate 20, the two upright posts 19 are fixedly arranged on two sides of the front end of the first beam 17, the left end and the right end of the first baffle plate 20 are respectively and fixedly arranged at the upper ends of the two upright posts 19, the lower edge of the first baffle plate 20 is slightly higher than the height of the tray placing frame 22, the tray placing frame 22 can pass through the tray blocking device under normal condition, the tray blocking device can block the tray placing frame 22 on the first tray placing frame 21 when the front, preventing dispensing tray 22 from sliding backwards. The rear end of the first cross beam 17 or the side edge close to the rear end position is fixedly connected with a stop lever 16, and the upper end of the stop lever 16 is close to the second ratchet wheel 9. When the rear end of the first cross beam 17 rises, the second ratchet wheel 9 can be propped against by the action of the stop lever 16, so that the conveyor can be prevented from running, and the material can stop falling. The rear end of the first beam 17 is placed on the second beam 15. The front end of the second beam 15 is hinged to the frame body, a torsion spring (not shown in the figure) is arranged at the hinged position, the rear end of the second beam 15 is lifted up under the action of the torsion spring to keep a horizontal state, the first beam 17 and the second beam 15 are connected through a connecting rod 18, the upper end and the lower end of the connecting rod 18 are respectively hinged to the first beam 17 and the second beam 15, and the hinged position of the connecting rod 18 and the first beam 17 is located in front of the hinged position of the first beam 17 and the frame body. The third cross beam 14 is located behind the second cross beam 15, a horizontal blind hole is formed in the rear end of the second cross beam 15, a horizontal rod 28 and a cross beam spring 29 are arranged in the horizontal blind hole, the cross beam spring 29 is located in front of the horizontal rod 28, and the rear end of the horizontal rod 28 is located at the front end of the third cross beam 14. An inclined surface is arranged above the rear end of the horizontal rod 28 or below the front end of the third crossbeam 14.

As shown in fig. 4, the middle position of the third cross beam 14 is hinged to the vertical support rod 11, the lower end of the support rod 11 is fixed to the frame body, the upper end of the support rod 11 is fixedly connected to the second baffle 27, and the second baffle 27 is located above the rear end of the second cross beam 15, so that the dispensing tray 22 on the second cross beam 15 can be prevented from moving backwards continuously. Be equipped with on No. three crossbeam 14 rear segments and swim the sign indicating number 12, No. three crossbeam 14 downside is equipped with the tooth, forms the rack structure, swim the sign indicating number 12 be equipped with rack engaged with worm 26, swim the sign indicating number 12 be hollow structure, worm 26 be located swim the sign indicating number 12 middle cavity position, worm 26 rotates with swim the sign indicating number 12 through the worm axle at both ends and is connected. The worm 26 is rotated to adjust the front and back positions of the rider 12, and the weight of the split materials can be adjusted through the rider 12.

No. two put the below that plate rail 13 is located No. three crossbeam 14 to when satisfying No. two crossbeam 15 and fall, No. two crossbeam 15 rear ends can fall on No. two put plate rail 13, No. two put plate rail 13 and be used for placing splendid attire partial shipment dish 22.

The operation flow is as follows: during the use, the material that will treat the partial shipment is put in hopper 2 down, help the material to fall from hopper 2 rear opening down through the vibration effect, prevent that the material from piling up on hopper 2 down, the material falls on bucket conveyor's little hopper 8, the gravity action drive bucket conveyor through the material is rotatory, simultaneously play the vibration effect to hopper 2 down through a ratchet 4 and spring leaf 3, because material weight is the same basically in every little hopper 8, make the impact force of material to packing tray 22 keep stable size, thereby can accurately weigh the material weight of going to the partial shipment. The empty tray is placed on the first tray placing frame 21, slides backwards and downwards under the action of gravity, slides onto the first cross beam 17 and then slides onto the second cross beam 15. When the small hopper 8 rotates to the position of the tail wheel 10 along with the traction chain 7, the materials in the small hopper 8 fall into the split charging tray 22 on the second cross beam 15. The third beam 14 plays a role of a weighing device, the rear end of the second beam 15 is supported by the third beam 14, when the subpackaging tray 22 on the second beam 15 is full, the front end of the third beam 14 is pressed down by gravity, the rear end of the second beam 15 falls on the second tray placing frame 13, and meanwhile, the second beam 15 is changed into an inclined state from a horizontal state; meanwhile, the front end of the first cross beam 17 is pulled downwards through the action of the connecting rod 18, the first cross beam 17 is changed from an inclined state to a horizontal state, so that an empty tray on the first cross beam 17 can be prevented from sliding onto the second cross beam 15 (at the moment, if the empty tray slides onto the rear end of the second cross beam 15, the second cross beam 15 can be clamped when returning), meanwhile, a tray stopper at the front end of the first cross beam 17 falls to block the empty tray on the first pallet frame 21 to prevent the empty tray from sliding downwards, meanwhile, the blocking rod 16 rises to block the second ratchet wheel 9 to stop the conveyor from running, so that the material stops falling, the filled pallet 22 is prevented from continuously falling to cause overlarge actual weight in the moving process, the material is prevented from spilling out to cause waste after the pallet 22 is moved, the filled pallet 22 slides onto the second pallet frame 13 from the second cross beam 15 in a smooth manner, and is pressed and lost by gravity, the second cross beam 15 is bounced under the action of a torsion spring at the front end of the second cross beam 15, when the rear end of the horizontal rod 28 is in contact with the front end of the third cross beam 14, the horizontal rod 28 is pushed forwards under the action of the inclined plane, then the second cross beam 15 can smoothly ascend to the upper side of the third cross beam 14, the first cross beam 17 is linked to restore the inclination, the first tray rack 21 and the empty trays on the first cross beam 17 sequentially slide downwards along with the empty trays, and meanwhile, the bucket conveyor starts to run to start a new round of weighing process.

The invention does not need power consumption, can work only by the gravity drive of the material, is energy-saving and environment-friendly, and can work in the power failure or no-power occasions.

In embodiment 3, as shown in fig. 5, the present embodiment includes a frame body, a lower hopper 2, a bucket conveyor, and a weighing assembly. The structure and connection relationship of the lower hopper 2, the bucket conveyor and its accessories are the same as those of embodiment 1, and will not be described in detail in this embodiment. The frame structure is adapted in accordance with changes in the structure of the assembly. The difference between this embodiment and embodiment 1 is mainly the change of the assembly.

The weighing assembly comprises a first tray placing frame 21, a second tray placing frame 13, a third beam 14 and a fourth beam 30, wherein the auxiliary structures and the connection relations of the first tray placing frame 21, the second tray placing frame 13, the third beam 14 and the third beam 14 are the same as those of embodiment 2, and the description of the embodiment is omitted. The middle position of the fourth beam 30 is hinged with the frame body, wherein a torsion spring is arranged at the hinged position, and the torsion spring acts on the upturned rear end of the fourth beam 30. The middle hinged part of the fourth beam 30 is low, the two ends are high, a front section and a rear section are formed, the front section and the rear section of the position where the front section is connected with the rear section on the upper side surface of the fourth beam 30 are high, the rear section is low, and a front-high-rear-low step structure is formed in the middle of the fourth beam 30, so that the sub-tray 22 on the rear section can be blocked, and the forward sliding of the sub-tray is prevented. No. four crossbeam 30's anterior segment is equipped with the strip hole 31 that moves towards from beginning to end, passes T shape pole 42 in the strip hole 31, T shape pole 42 include horizontally long arm 32 and vertical short arm 33, wherein long arm 32 front end and short arm 33's centre looks fixed connection, long arm 32 intermediate position passes strip hole 31 to it is articulated mutually with No. four crossbeam 30. During the natural state, through drooping of action of gravity T shape pole 42 front end, the rear end upwarps, when having the partial shipment dish 22 on No. four crossbeam 30 anterior segments, through partial shipment dish 22's action of gravity with T shape pole 42 rear end down to the front end upwarps, and the place ahead of No. four crossbeam 30 front end is upwards stretched out from short arm 33 upper end, has blocked partial shipment dish 22 on the putting plate rail 21, prevents its whereabouts, and when No. four crossbeam 30 anterior segments do not have partial shipment dish 22, partial shipment dish 22 on the putting plate rail 21 can freely slide down on No. four crossbeam 30. The side of the front end of the fourth beam 30 is fixedly connected with a vertical stop lever 41, when the rear end of the fourth beam 30 deflects upwards, the upper end of the stop lever 41 is inserted into a tooth groove of the second ratchet wheel 9, so that the bucket conveyor can stop running, the rear end of the fourth beam 30 is provided with a horizontal blind hole, a horizontal rod 28 and a beam spring 29 are arranged in the horizontal blind hole, and the specific technical characteristics of the horizontal blind hole, the horizontal rod 28 and the beam spring 29 are the same as those of embodiment 2.

During the use, the material in the small hopper 8 falls in the partial shipment dish 22 on No. four crossbeams 30 back ends, and after reaching the settlement weight, No. four crossbeams 30 rear end overcomes the holding power whereabouts of No. three crossbeam 14 front ends to No. four partial shipment dish 22 on the crossbeam 30 back end slides on No. two puts the plate rail 13, and the partial shipment dish 22 on No. four crossbeams 30 front end slides on the back end simultaneously, then under the effect of torsional spring, No. four crossbeam 30's position resumes, then the empty dish on a putting plate rail 21 slides on No. four crossbeams 30.

In embodiment 4, as shown in fig. 6, the present embodiment includes a frame body, a lower hopper 2, a bucket conveyor, and a weighing assembly. The structure and connection relationship of the lower hopper 2, the bucket conveyor and its accessories are the same as those of embodiment 1, and will not be described in detail in this embodiment. The frame structure is adapted in accordance with changes in the structure of the assembly. The difference between this embodiment and embodiment 1 is mainly the change of the assembly.

The weighing assembly comprises a first tray placing frame 21, a second tray placing frame 13, a third tray placing frame 35, a fifth cross beam 38, a sixth cross beam 36, a second connecting rod 37 and a traveling block 12. The three tray placing frames are high in front and low in back and are arranged from front to back according to the sequence of the first tray placing frame, the second tray placing frame 21 and the second tray placing frame 13, the same as the embodiment 2, are fixed on the frame body, the third tray placing frame 35 is fixed at the back end of the fifth cross beam 38, the fifth cross beam 38 is horizontally placed and located below the first tray placing frame 21, and the front end of the fifth cross beam is hinged with the frame body. The sixth cross beam 36 is located below the fifth cross beam 38, the middle position of the sixth cross beam 36 is hinged to the frame body, teeth are arranged below the front section of the sixth cross beam 36 to form a rack structure, the rider 12 is located on the rack structure, and the structure of the rider 12 is the same as that of embodiment 2, which is not described in detail in this embodiment. Two ends of the second connecting rod 37 are hinged to the fifth cross beam 38 and the sixth cross beam 36 respectively, wherein the hinged position of the second connecting rod 37 and the sixth cross beam 36 is located on the rear half section of the sixth cross beam 36, and the distance between the two hinged ends on the fifth cross beam 38 is larger than the distance between the two hinged points on the sixth cross beam 36. The rear end of the sixth cross beam 36 is fixedly provided with a vertical rod 34, and in a natural state, the upper end of the vertical rod 34 penetrates through a gap between the third tray placing frame 35 and the second tray placing frame 13, is positioned behind the subpackaging tray 22 on the third tray placing frame 35, and can block the subpackaging tray 22 to prevent the subpackaging tray 22 from sliding backwards. The sixth cross beam 36 is provided with a cross beam rod 43, the lower end of the cross beam rod 43 is fixedly connected with the sixth cross beam 36, the upper end of the cross beam rod 43 is positioned on the front side of the second ratchet wheel 9, the upper end of the cross beam rod 43 is provided with a stop hook 44 facing the second ratchet wheel 9, and when the rear end of the sixth cross beam 36 is inclined downwards, the stop hook 44 on the upper end of the cross beam rod 43 can be inserted into a tooth groove of the second ratchet wheel 9, so that the rotation of the second ratchet wheel 9 can be stopped.

After the racking trays 22 on the third tray rack 35 are filled, the rear end of the fifth beam 38 falls, the rear end of the sixth beam 36 is driven to fall through the second connecting rod 37, the distance between two hinged ends on the fifth beam 38 is larger than the distance between two hinged points on the sixth beam 36, the falling distance of the vertical rod 34 is larger than the falling distance of the third tray rack 35, as shown by a double-dot chain line in fig. 6, the upper end of the vertical rod 34 after falling is lower than the position of the third tray rack 35, so that the racking trays 22 on the third tray rack 35 can smoothly slide backwards onto the second tray rack 13, the empty trays on the first tray rack 21 can slide backwards onto the third tray rack 35, and the load of the third tray rack 35 is reduced, and the fifth beam 38 and the sixth beam 36 are reset.

In embodiment 5, as shown in fig. 7, the present embodiment includes a frame body, a lower hopper 2, a bucket conveyor, and a weighing assembly. The structure and connection relationship of the lower hopper 2, the bucket conveyor and its accessories are the same as those of embodiment 1, and will not be described in detail in this embodiment. The frame structure is adapted in accordance with changes in the structure of the assembly. The difference between this embodiment and embodiment 1 is mainly the change of the assembly.

The weighing assembly comprises a hopper frame, a third cross beam 14 and a fourth tray placing frame 49. The hopper frame is characterized in that a central shaft is arranged in the middle of the hopper frame, two ends of the central shaft are connected with the frame body, the hopper frame can rotate around the central shaft, a series of rotary hoppers 45 which are uniformly distributed around the central shaft are arranged on the periphery of the hopper frame, and in the optimization scheme, the number of the rotary hoppers 45 is 3. The hopper frame is provided with a series of supporting rods 46 which are radially and uniformly arranged around the central shaft, and the number of the supporting rods 46 is equal to that of the rotary hoppers 45. The third cross beam 14 is located in front of the hopper frame, and the rear end of the third cross beam 14 is located on a path through which the supporting rod 46 rotates, that is, when the supporting rod 46 rotates along with the hopper frame, the third cross beam 14 can block the supporting rod 46, so that the hopper frame stops rotating. The relationship of the third beam 14, the support rod 46 and the rotary hopper 45 satisfies: when the third beam 14 blocks the support rod 46, one of the rotary hoppers 45 is positioned below the bucket conveyor, the material falling from the small hopper 8 can fall into the rotary hopper 45, the rotary hopper 45 is positioned in front of and above the central shaft, the opening of the previous full rotary hopper 45 faces downward, and the angle of the previous full rotary hopper 45 can enable the material in the rotary hopper 45 to fall out completely.

The middle position of the third beam 14 is hinged to the frame body, teeth are arranged below the front section of the third beam 14 to form a rack structure, the rider 12 is located on the rack structure, and the rider 12 and the auxiliary structures thereof are the same as those in embodiment 2 and will not be described in detail in this embodiment.

The fourth tray holding frame 49 is located below the hopper frame, the fourth tray holding frame 49 is high in front and low in back, a series of sub-packaging trays 22 are placed on the fourth tray holding frame 49 in the front-back direction, and one of the sub-packaging trays 22 is located below the hopper frame and can receive materials falling from the rotary hopper 45. The frame body is provided with a material guide plate 47, the material guide plate 47 is positioned on a path for the materials in the rotary hopper 45 to fall, the lower end of the material guide plate 47 is positioned above the sub-packaging tray 22 below the hopper frame, and the material guide plate is used for blocking the materials which fall around and guiding the materials into the sub-packaging tray 22.

A blocking disc rod 48 is arranged behind the subpackaging disc 22 below the hopper frame, the lower end of the blocking disc rod 48 is hinged to a fourth disc placing frame 49, a cavity capable of containing the blocking disc rod 48 is formed in the position below the blocking disc rod 48 on the fourth disc placing frame 49 and behind the blocking disc rod 48, a torsion spring is arranged at the hinged position of the lower end of the blocking disc rod 48, the blocking disc rod 48 is kept in a vertical state and can block an empty subpackaging disc 22 under the action of the torsion spring, and the full subpackaging disc 22 cannot be blocked by the elasticity of the torsion spring.

The working principle of the embodiment is as follows: in the same manner as in example 1, the material in the lower hopper falls into the small hopper 8 on the bucket conveyor, and the material in the small hopper 8 falls into the rotary hopper 45 below the small hopper. The front end portion of the hopper frame is therefore heavy; keep off branch 46 through the effect of No. three crossbeam 14, after the material in the rotatory hopper 45 reached and set for weight, branch 46 pushed down No. three crossbeam 14 rear end, thereby the hopper frame can be rotatory along anticlockwise in figure 7, the rotatory hopper 45 that fills up rotates to the below, inside material is whole to fall into in the subpackaging dish 22 of its below, subpackaging dish 22 fills up the back, weight increases, simultaneously also increase along with the thrust to keeping off a set pole 48, push down keeping off a set pole 48 backward, thereby this subpackaging dish 22 can slide backward away, the empty dish in its place ahead slides down backward. When the filled dispensing tray 22 slides away, the tray blocking lever 48 is re-erected by the torsion spring, and when the empty tray slides down, the tray blocking lever 48 blocks the path of the empty tray due to the light weight of the empty tray.

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims

1. An automatic weighing and subpackaging device comprises a frame body, a feeding hopper and a weighing and subpackaging assembly; the method is characterized in that: also comprises a bucket conveyor; the rear end of the discharging hopper is provided with an opening, the rear end or the position close to the rear of the discharging hopper is hinged with the frame body, the discharging hopper is high in front and low in rear, a supporting spring is arranged below the front end of the discharging hopper, the upper end of the supporting spring is propped against the discharging hopper, and the lower end of the supporting spring is fixed on the frame body; the bucket conveyor is positioned below the opening of the lower hopper and comprises a traction chain, a small hopper, a head wheel, a tail wheel, a first ratchet wheel, a second ratchet wheel and a connecting plate; the head wheel and the tail wheel are arranged on the connecting plate through wheel shafts, the tail wheel is positioned behind and below the head wheel, the traction chain is wound on the head wheel and the tail wheel, and the small hopper is fixed on the periphery of the traction chain; the axial side edges of the head wheel and the tail wheel are respectively and fixedly connected with a first ratchet wheel and a second ratchet wheel, a spring piece is fixedly connected to the blanking hopper, and one end of the spring piece is pressed on the first ratchet wheel; the small hopper comprises a hopper rod, a hopper body and a tail hook, the middle position of the hopper rod is hinged with the traction chain, the hopper body is positioned at one end of the hopper rod, and the end is positioned on the hopper rod and faces the moving direction of the traction chain; the tail hook is positioned on the side edge of the other end of the hopper rod, faces to a connecting plate of the bucket conveyor and is positioned on the plane of the connecting plate; the part of the traction chain, which is hinged with the hopper rod, is of a structure protruding outwards on the traction chain, and a torsional spring is arranged at the hinged part of the hopper rod; a stop block is fixedly arranged at the upper end of the connecting plate and is positioned on a path through which the tail hook of the small hopper passes; the weighing assembly is positioned below the bucket conveyor and comprises a first tray placing frame, a second tray placing frame, a first cross beam, a second cross beam and a third cross beam; the first tray placing frame and the second tray placing frame are fixed on the frame body; the first tray placing frame, the second tray placing frame and the first cross beam are obliquely placed, the front part is high, the rear part is low, the first cross beam is positioned behind the first tray placing frame, the front end of the first cross beam is close to the rear end of the first tray placing frame, the middle position of the first cross beam is hinged with the frame body, the front end of the first cross beam is provided with a tray blocking device, the tray blocking device comprises two stand columns and a first baffle plate, the two stand columns are fixedly arranged on two sides of the front end of the first cross beam, the left end and the right end of the first baffle plate are respectively fixedly arranged on the upper ends of the two stand columns, and the lower edge of the first baffle plate is slightly higher than the height of the subpackaging tray; the side edge of the rear end or the position close to the rear end of the first cross beam is fixedly connected with a stop lever, and the upper end of the stop lever is close to the second ratchet wheel; the rear end of the first cross beam is placed on the second cross beam; the front end of the second cross beam is hinged with the frame body, a torsional spring is arranged at the hinged position, the first cross beam is connected with the second cross beam through a connecting rod, the upper end and the lower end of the connecting rod are respectively hinged with the first cross beam and the second cross beam, and the hinged position of the connecting rod and the first cross beam is positioned in front of the hinged position of the first cross beam and the frame body; the third cross beam is positioned behind the second cross beam, the rear end of the second cross beam is provided with a horizontal blind hole, a horizontal rod and a cross beam spring are arranged in the horizontal blind hole, the cross beam spring is positioned in front of the horizontal rod, and the rear end of the horizontal rod is positioned at the front end of the third cross beam; an inclined plane is arranged above the rear end of the horizontal rod or below the front end of the third cross beam; the middle position of the third cross beam is hinged with the vertical supporting rod, the lower end of the supporting rod is fixed on the frame body, the upper end of the supporting rod is fixedly connected with a second baffle plate, and the second baffle plate is positioned above the rear end of the second cross beam; the rear section of the third cross beam is provided with a sliding block, the lower side surface of the third cross beam is provided with teeth to form a rack structure, the sliding block is provided with a worm meshed with the rack, the sliding block is of a hollow structure, the worm is positioned in a middle cavity of the sliding block, and the worm is rotatably connected with the sliding block through worm shafts at two ends; the second tray placing frame is positioned below the third cross beam.