CN221317847U - Negative pressure adsorption type conveying and collecting device for tobacco harvesting machine - Google Patents

Abstract

The utility model relates to a negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester, which comprises a transverse conveying mechanism and a vertical conveying mechanism, wherein the transverse conveying mechanism is used for conveying tobacco leaves to one side of the lower part of the vertical conveying mechanism, the vertical conveying mechanism comprises a negative pressure cavity and a negative pressure conveying belt wound around the negative pressure cavity, the adsorption side of the negative pressure cavity is provided with a plurality of first holes, the negative pressure conveying belt is provided with a plurality of second holes, the negative pressure conveying belt is used for adsorbing the tobacco leaves and conveying the tobacco leaves upwards, the negative pressure cavity is connected with a negative pressure exhaust pipe, and the other end of the negative pressure exhaust pipe is connected with an air inlet of a negative pressure fan. The negative pressure conveyer belt is adopted to replace the existing inner and outer conveyer belts for clamping conveying, the hole surface of the negative pressure conveyer belt has negative pressure adsorption force, tobacco leaves can be adsorbed, and the tobacco leaves are conveyed upwards along with the negative pressure conveyer belt, finally, the tobacco leaves are conveyed into the tobacco leaf collecting box, conveying and collecting of the tobacco leaves are completed, the tobacco leaves are adsorbed on the surface of the conveyer belt, and the tobacco leaves are not damaged in the conveying process.

Description

Negative pressure adsorption type conveying and collecting device for tobacco harvesting machine

Technical Field

The utility model relates to the technical field of tobacco leaf harvesting machines, in particular to a negative pressure adsorption type conveying and collecting device for a tobacco leaf harvesting machine.

Background

Common tobacco harvesting machines are semi-automatic and fully automatic. Semi-automatic harvester, need collect tobacco leaf with the help of manual picking, place collection frame or the conveyer belt on the harvester (carry to collection frame by the conveyer belt). The full-automatic harvester can complete full automation of tobacco leaf picking, conveying and collecting, the tobacco leaf picking efficiency is higher, the labor intensity of tobacco farmers is lightened, but the tobacco leaves are damaged to a certain extent in the picking process, and the loss is concentrated in tobacco leaf picking loss and conveying loss. For example, a lifting and conveying system for a tobacco picking machine disclosed in Chinese patent publication No. CN217946451U mainly comprises a horizontal conveying roller mechanism and a vertical conveying mechanism. The picked tobacco leaves are conveyed to the bottom of the vertical conveying mechanism through the horizontal conveying roller mechanism and then are conveyed upwards through the vertical conveying mechanism. The vertical conveying mechanism adopts an outside conveying belt and an inside conveying belt to clamp tobacco leaves for upward conveying. For convenience of description, as shown in fig. 1, when the tobacco leaves 1 pass through the butt joint (denoted as a) of the horizontal conveying roller mechanism 3 and the vertical conveying mechanism 2, the tobacco leaves are clamped by the inner conveying belt 22 and the outer conveying belt 21 in the process of entering the vertical conveying mechanism 2 due to oversized corners, and the main veins of the tobacco leaves may be broken due to bending of the tobacco leaves. After the tobacco leaves enter the vertical conveying mechanism 2, the tobacco leaves are extruded, rubbed and the like by the inner conveying belt and the outer conveying belt, and the surfaces of the tobacco leaves are damaged.

Disclosure of utility model

The utility model aims to provide a negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester, which solves the problem of damage in the tobacco leaf conveying process.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The negative pressure adsorption type conveying and collecting device for the tobacco harvesting machine comprises a transverse conveying mechanism and a vertical conveying mechanism, wherein the transverse conveying mechanism is used for conveying tobacco leaves to one side of the lower part of the vertical conveying mechanism, the vertical conveying mechanism comprises a negative pressure cavity and a negative pressure conveying belt wound around the negative pressure cavity, the adsorption side of the negative pressure cavity is provided with a plurality of first holes, the negative pressure conveying belt is provided with a plurality of second holes, and the negative pressure conveying belt is used for adsorbing the tobacco leaves and conveying the tobacco leaves upwards into a tobacco leaf collecting box; the negative pressure cavity is connected with a negative pressure exhaust pipe, and the other end of the negative pressure exhaust pipe is connected with an air inlet of a negative pressure fan.

Further, the transverse conveying mechanism comprises a conveying smooth rod and at least two belt conveying rollers, a stripe conveying belt is wound on the belt conveying rollers, and the stripe conveying belt is obliquely arranged between the vertical conveying mechanism and the conveying smooth rod.

Further, one side of negative pressure cavity upper portion, the length direction in positive pressure wind channel sets up along the front and back, and positive pressure wind channel is connected with negative pressure fan's gas outlet, is equipped with a plurality of air-out holes on the positive pressure wind channel, and the air-out hole is towards one side of negative pressure cavity's absorption tobacco leaf.

Further, a guide plate is arranged above the negative pressure cavity, so that tobacco leaves are guided and then fall into a tobacco leaf collecting box at the other side of the negative pressure cavity.

Further, a diversion fan is arranged on one side of the upper portion of the negative pressure cavity, and the length direction of the diversion fan is arranged along the front-back direction.

Further, a protection plate is arranged on one side of the negative pressure cavity, which adsorbs tobacco leaves, and the protection plate and the negative pressure conveying belt are arranged at intervals.

Further, the tobacco leaf collecting box comprises a main frame body and a side cover plate, wherein the main frame body is detachably connected with the side cover plate, the main frame body is detachably connected with a frame of the harvester, and the upper part of the main frame body is opened.

Another technical scheme of the negative pressure adsorption type conveying and collecting device for the tobacco harvesting machine is as follows:

The tobacco leaf picking device comprises a negative pressure cavity and a negative pressure conveying belt wound around the negative pressure cavity, wherein the adsorption side of the negative pressure cavity is provided with a plurality of first holes, the negative pressure cavity comprises a transverse conveying part and a vertical conveying part which are integrally formed, the negative pressure conveying belt is provided with a plurality of second holes, the second holes are used for adsorbing tobacco leaves, and the negative pressure conveying belt is used for conveying picked tobacco leaves obliquely upwards firstly and then vertically upwards to a tobacco leaf collecting box; the negative pressure cavity is connected with a negative pressure exhaust pipe, and the other end of the negative pressure exhaust pipe is connected with an air inlet of a negative pressure fan.

Further, a positive pressure air duct is arranged on one side of the upper portion of the negative pressure cavity, the length direction of the positive pressure air duct is arranged along the front and back direction, the positive pressure air duct is connected with an air outlet of the negative pressure fan, a plurality of air outlet holes are formed in the positive pressure air duct, and the air outlet holes face one side of the negative pressure cavity, where tobacco leaves are adsorbed.

Further, a guide plate is arranged above the negative pressure cavity, so that tobacco leaves are guided and then fall into a tobacco leaf collecting box at the other side of the negative pressure cavity.

Further, a diversion fan is arranged on one side of the upper portion of the negative pressure cavity, and the length direction of the diversion fan is arranged along the front-back direction.

Further, a protection plate is arranged on one side of the vertical conveying part, where tobacco leaves are adsorbed, and the protection plate and the negative pressure conveying belt are arranged at intervals.

Further, the negative pressure adsorption type conveying and collecting device further comprises a guide pinch roller and a supporting riding wheel, wherein the guide pinch roller is arranged at the joint of the transverse conveying part and the vertical conveying part and used for pressing the edge of the negative pressure conveying belt, and the supporting riding wheel is arranged on the back side of the negative pressure conveying belt and used for supporting the negative pressure conveying belt.

Further, the tobacco leaf collecting box comprises a main frame body and a side cover plate, wherein the main frame body is detachably connected with the side cover plate, the main frame body is detachably connected with a frame of the harvester, and the upper part of the main frame body is opened.

Further, a side opening is arranged on one side of the main frame body, which faces the side cover plate, and the edge of the side opening is connected with the side cover plate through a hasp structure.

The utility model has the beneficial effects that:

When the tobacco leaf picking device is used, tobacco leaves are picked by the tobacco leaf picking device and fall onto the transverse conveying mechanism, and the transverse conveying mechanism conveys the tobacco leaves to the lower part of the vertical conveying mechanism. When the negative pressure conveyer belt rotates, the non-porous place of the negative pressure conveyer belt is adsorbed on the negative pressure cavity for friction sliding, and when part of the second holes of the negative pressure conveyer belt are communicated with part of the first holes of the negative pressure cavity, the hole surface of the negative pressure conveyer belt has negative pressure adsorption force, so that tobacco leaves can be adsorbed, and then conveyed upwards along with the negative pressure conveyer belt, and tobacco leaf conveying is completed. Solves the problem of damaging tobacco leaves in the prior art that the tobacco leaves are clamped by the inner and outer conveyor belts for conveying, and improves the quality of the tobacco leaves.

When the tobacco leaves are adsorbed and conveyed to the top of the negative pressure conveying belt, the air blowing component generates high-pressure air flow, the tobacco leaves change the moving direction under the action of the high-pressure air flow, and the tobacco leaves are guided into the tobacco leaf collecting box through the guide plate, so that the tobacco leaf collecting work is completed.

Under the negative pressure adsorption of the negative pressure conveying belt, tobacco leaves can be sequentially conveyed upwards, so that the tobacco leaves falling into the tobacco leaf collecting box are also ensured to be stacked in one piece, and the subsequent further arrangement is facilitated.

The protection plates are arranged at one side of the negative pressure cavity, which is used for adsorbing tobacco leaves, so that tobacco leaves which are not picked when passing through the picking channel can be prevented from affecting the tobacco leaves which are adsorbed and conveyed, and the scraping risk is reduced; and the external fine particles can be effectively prevented from entering the negative pressure cavity to influence the negative pressure adsorption force.

Drawings

FIG. 1 is a schematic diagram of a prior art tobacco conveying mechanism;

FIG. 2 is a perspective view of a negative pressure suction type conveying and collecting device for a tobacco leaf harvester (front side view applied to the harvester) according to the present utility model;

FIG. 3 is another angular perspective view of the negative pressure suction conveying and collecting device for a tobacco harvester of the present utility model (a rear side view for use on the harvester);

Fig. 4 is a schematic structural view of the negative pressure suction type conveying apparatus in fig. 2 (showing a pair of structures provided on both left and right sides);

FIG. 5 is a perspective view (partially cut away) of the negative pressure suction type conveying and collecting device on the right side;

FIG. 6 is a perspective view of the negative pressure suction type conveying apparatus of FIG. 5;

FIG. 7 is another angled perspective view of the negative pressure suction conveyor;

FIG. 8 is a schematic diagram of the structure of the positive pressure air duct;

FIG. 9 is a perspective view of the tobacco leaf collecting bin;

FIG. 10 is an exploded view of the tobacco leaf collection bin;

FIG. 11 is a perspective view (partially cut away) of an embodiment 2 of a negative pressure suction type conveying and collecting apparatus;

FIG. 12 is another angular view of embodiment 2 of the negative pressure suction conveying and collecting device;

Fig. 13 is a schematic diagram of an embodiment 2 of a negative pressure adsorption type conveying and collecting device.

Name corresponding to each label in the figure:

1. Tobacco leaves; 2. a vertical conveying mechanism; 21. an outer conveyor belt; 22. an inner conveyor belt; 3. a horizontal conveying roller mechanism;

41. A frame; 42. a tobacco leaf collecting box; 421. a main frame; 422. a side cover plate; 423. a hasp; 424. a hasp ear seat; 425. a connecting seat; 43. a picking device; 44. a travelling crane system; 45. a battery energy storage system; 46. an electrical control system;

5. A vertical conveying mechanism; 50. a negative pressure conveyer belt; 501. a second hole; 51. negative pressure exhaust tube; 52. a negative pressure fan; 53. a positive pressure air duct; 531. an air outlet hole; 532. an air inlet pipe joint; 54. a deflector; 55. a protection plate; 56. positive pressure air outlet pipe; 57. a negative pressure cavity; 571. a first hole; 572. a vertical conveying section; 573. an upper mounting seat; 574. A lower mounting seat; 575. A side wall panel;

6. a lateral conveying mechanism; 60. A striped conveyor belt; 61. Conveying smooth rolls;

71. Tobacco plant opposite-running guide plate; 72. Nylon bars;

81. a blower; 91. a guide pinch roller; 92. and supporting the riding wheels.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

Example 1 of the present utility model:

As shown in fig. 2-3, the tobacco leaf harvester is in different angle views, and mainly comprises a travelling crane system 44, a battery energy storage system 45, a picking device 43, a conveying device, a frame 41 and an electrical control system 46. The utility model mainly improves a tobacco leaf conveying device, namely adopts a negative pressure adsorption type conveying device, is provided with a pair of tobacco leaf conveying devices, and is symmetrically arranged on a frame. The running system 44 employs an electric track drive chassis system, and the battery energy storage system 45 provides power to the power components on the device. In other embodiments, the driving mechanism can be driven by hydraulic driving other than motor driving, internal combustion engine driving and the like, and the frame type can also be three-wheel type or four-wheel type instead of crawler type.

Before defining the advancing direction of the tobacco leaf harvester, the structure of the conveying and collecting devices on the left side and the right side is the same, and the structure and the principle of the negative pressure adsorption type conveying and collecting device on the right side are introduced for convenience of description.

As shown in fig. 2-3, the negative pressure adsorption type conveying and collecting device for the tobacco leaf harvesting machine comprises a transverse conveying mechanism 6 and a vertical conveying mechanism 5, wherein the transverse conveying mechanism 6 and the vertical conveying mechanism 5 are separately arranged and independently work, the transverse conveying mechanism 6 is used for conveying tobacco leaves to one side of the bottom of the vertical conveying mechanism 5, and then the vertical conveying mechanism 5 is used for continuously conveying the tobacco leaves upwards.

The transverse conveying mechanism 6 comprises a conveying smooth rod 61 and two belt conveying rollers, wherein the axial directions of the two belt conveying rollers are along the front-rear direction, and the rollers are arranged in parallel. As shown in fig. 4, the belt conveyor rollers are wound with a striped conveyor belt 60, one of which is a power roller. The stripe conveyor 60 is disposed between the vertical conveyor 5 and the conveyor roller in an inclined manner. The stripe conveyor belt 60 has a certain friction force due to stripe bulges on the belt surface, so that tobacco leaves can be smoothly and efficiently conveyed to the vertical conveying mechanism 5.

As shown in fig. 2-3, the picking device 43 is a prior art structure that includes a rotatable picking plate that rotates to pick off tobacco leaves from a range of heights on the tobacco plants and drop the tobacco leaves onto the lateral transport mechanism 6. As shown in fig. 5, the conveying smooth roller 61 is arranged at one side close to the tobacco plants, so that the tobacco plants can be effectively prevented from being damaged by the broken skin of the tobacco plant stems and the like when passing through the picking channel. The front side of the transverse conveying mechanism 6 is also provided with a tobacco plant opposite guide plate 71, which is similar to a triangular plate, and the tobacco plant opposite guide plates 71 on the left side and the right side are matched for use, so that the tobacco plant can be guided into the harvesting channel, and the tobacco plant and tobacco leaf are prevented from being pushed down or damaged in the walking process of the harvester. The positions of the harvesting channels are also provided with a plurality of nylon shelves 72 which are arranged in a row in the front-rear direction, so that the picked tobacco leaves can be prevented from falling on the tobacco fields (if the nylon shelves 72 are not provided, the tobacco leaves can directly fall from the harvesting channels) without influencing the passage of tobacco plants in the harvesting channels.

As shown in fig. 5 to 7, the vertical conveying mechanism 5 includes a negative pressure chamber 57, and a negative pressure conveying belt 50 wound around the negative pressure chamber 57, and the negative pressure chamber 57 has a rectangular frame structure. Side wall plates 575 are arranged on the front side and the rear side of the negative pressure cavity, and the upper end and the lower end of each side wall plate are respectively connected with an upper mounting seat 573 and a lower mounting seat 574 and are used for being connected with a frame. The right side of the negative pressure cavity 57 is provided with a plurality of first holes 571, the negative pressure conveyer 50 is provided with a plurality of second holes 501, the second holes 501 can generate suction force for adsorbing tobacco leaves when in use, and the negative pressure conveyer 50 is used for conveying the tobacco leaves after adsorption upwards. The upper and lower sides of the negative pressure chamber 57 are provided with rollers, wherein the upper side is a power roller, and the negative pressure conveyer belt 50 is matched with the two rollers. For the negative pressure cavity on the other side, the first hole is formed on the left side surface, namely, only one side for adsorbing tobacco leaves is required to be provided with an adsorption hole.

The front side of the negative pressure cavity 57 is connected with a negative pressure exhaust pipe 51, and the other end of the negative pressure exhaust pipe 51 is connected with an air inlet of the negative pressure fan 52. The negative pressure fan 52 adopts a vortex type high-pressure fan, and when in operation, air in the negative pressure cavity 57 is pumped away, so that negative pressure adsorption force is generated in the cavity, and source power is provided for tobacco adsorption type conveying. The negative pressure fan 52 is fixed to the frame 41 through a fan base. The negative pressure cavities on the left side and the right side can be respectively connected with a negative pressure fan, and can also share a high-power negative pressure fan.

As shown in fig. 5 and 6, the air outlet of the negative pressure fan 52 is connected to a positive pressure air duct 53 through a positive pressure air outlet duct 56. The positive pressure air duct 53 is provided in the longitudinal direction, and the positive pressure air duct 53 is located at one side of the upper portion of the negative pressure chamber 57. The positive pressure air duct 53 has connection plates at both ends and is further installed to the side wall plates 575 by way of L-shaped plates. As shown in fig. 7 and 8, the main body of the positive pressure air duct 53 is rectangular and tubular, a row of air outlet holes 531 are arranged on the positive pressure air duct 53, and the air outlet holes 531 face to one side of the negative pressure cavity 57 where tobacco leaves are adsorbed and are used for blowing the tobacco leaves reaching the top of the vertical conveying mechanism 5, and the moving direction of the tobacco leaves is changed by using air flow. An air inlet pipe joint 532 is provided on the side of the positive pressure air duct 53 facing back from the air outlet hole 531, and is connected to the positive pressure air outlet pipe 56. The utility model utilizes the air outlet pipe of the negative pressure fan 52 to be connected with the positive pressure air duct 53 to provide positive pressure air flow. In other embodiments, other structures that can achieve this function can be used, and the following embodiment 2 provides another way.

As shown in fig. 5, a deflector 54 is disposed above the positive pressure air duct 53, and the main part of the deflector is arc-shaped, so that the tobacco leaves are guided and fall into the tobacco leaf collecting box 42 at the other side of the negative pressure cavity 57, and the tobacco leaf collecting box 42 can be detached after a certain amount of tobacco leaves are collected.

As shown in fig. 9 to 10, the tobacco leaf collecting box 42 is a rectangular frame as a whole, and includes a main frame 421 and a side cover 422, and the main frame 421 and the side cover 422 are both mesh structures made by welding. The main frame 421 has a side opening and an upper opening, the upper opening is used for allowing tobacco leaves to fall into, and the side opening is used for connecting with the side cover 422. The side opening is connected with the side cover 422 through a hasp structure, a hasp 423 is arranged on the main frame 421, and a hasp ear 424 is arranged on the side cover 422. The bottom of the main frame 421 is provided with a connecting seat 425 which is connected to the frame through bolts.

When the tobacco leaf collecting box is used, tobacco leaves are collected in the tobacco leaf collecting box 42, after the tobacco leaf collecting box 42 is full, the whole tobacco leaf collecting box 42 can be detached, and the empty tobacco leaf collecting box can be replaced, so that quick replacement is realized, and the efficiency is improved. When the empty tobacco collecting box is insufficient, the side cover plate on the tobacco collecting box 42 can be opened, tobacco in the tobacco collecting box can be taken out manually, then the side cover plate is reloaded, and the harvesting machine can continue to perform tobacco harvesting work.

Specifically, the working principle of negative pressure adsorption conveying and collecting is as follows:

When the negative pressure conveyer belt 50 rotates, the non-porous place of the negative pressure conveyer belt 50 is adsorbed on the negative pressure cavity 57 to slide in a friction way, when part of the second holes 501 of the negative pressure conveyer belt 50 are communicated with part of the first holes 571 on the negative pressure cavity 57, the hole surface of the negative pressure conveyer belt 50 has negative pressure adsorption force, and when the tobacco leaf surface contacts a certain number of the second holes 501, the tobacco leaf surface can overcome the factors such as self gravity, friction force and the like and is adsorbed on the negative pressure conveyer belt 50 to be conveyed along with the tobacco leaf surface. When the tobacco leaves are adsorbed and conveyed to the top of the negative pressure conveying belt 50, high-pressure air flow is generated in the positive pressure air duct 53, the tobacco leaves change the moving direction under the action of the high-pressure air flow, and the tobacco leaves enter the tobacco leaf collecting box 42 through the guide plate 54, so that the conveying and collecting work of the tobacco leaves is completed.

Under the suction of the negative pressure conveyer belt 50, the tobacco leaves can be sequentially conveyed upwards, so that the tobacco leaves falling into the tobacco leaf collecting box 42 are also ensured to be stacked one by one, and the subsequent further treatment is facilitated.

Further, the protection plate 55 is arranged on one side of the negative pressure cavity 57, where tobacco leaves are adsorbed, and the protection plate 55 and the negative pressure conveying belt 50 are arranged at intervals, so that the protection plate 55 does not affect normal tobacco leaf adsorption and conveying, and in addition, tobacco leaves which are not picked when passing through a picking channel can be prevented from affecting the tobacco leaves which are adsorbed and conveyed, and scraping risks are reduced. And can also effectively prevent external fine particles from entering the negative pressure cavity 57 to influence the negative pressure adsorption force.

Example 2 of the present utility model:

As shown in fig. 11-13, a negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester comprises a negative pressure cavity 57 and a negative pressure conveying belt 50 wound around the negative pressure cavity 57, wherein a plurality of first holes 571 are formed in the adsorption side of the negative pressure cavity 57, and the negative pressure cavity 57 comprises an integrally formed transverse conveying part and a vertical conveying part 572. The main difference from embodiment 1 is that the lower conveying and vertical conveying of embodiment 1 are separately provided, and the negative pressure chamber 57 is integrally provided in embodiment 2, and the negative pressure conveyer belt is also one and no additional stripe conveyer belt 60 (structure in embodiment 1) is provided. The principle of negative pressure adsorption is the same for both embodiments.

The negative pressure conveyer belt 50 is provided with a plurality of second holes 501, the second holes 501 are used for adsorbing tobacco leaves, and the negative pressure conveyer belt 50 is used for conveying picked tobacco leaves obliquely upwards and then vertically upwards. The negative pressure cavity 57 is connected with a negative pressure exhaust pipe 51, and the other end of the negative pressure exhaust pipe 51 is connected with an air inlet of the negative pressure fan 52.

A guiding blower 81 is provided on the top side of the vertical conveying part 572, and the guiding blower 81 is a drum-type centrifugal blower, and is capable of blowing air to tobacco leaves located in the top area, and changing the moving direction of the tobacco leaves. The positive pressure air duct structure in embodiment 1 can also be adopted to provide air flow, the air outlet of the negative pressure fan is connected with a positive pressure air duct, the length direction of the positive pressure air duct is arranged along the front and back direction, the positive pressure air duct is positioned on one side of the upper part of the negative pressure cavity, a plurality of air outlet holes are formed in the positive pressure air duct, and the air outlet holes face one side of the negative pressure cavity where tobacco leaves are adsorbed.

One side of the air guide blower 81 is provided with a guide plate 54 so that the tobacco leaves are guided and then fall into the tobacco leaf collecting box 42 at the other side of the negative pressure chamber 57. The tobacco leaf collecting box 42 in this embodiment has an outwardly extending inclined surface on the top outside thereof so that the upper opening is larger and more tobacco leaves can be accommodated than in embodiment 1.

The vertical conveying part 572 is provided with a protection plate 55 at one side where tobacco leaves are adsorbed, and the protection plate 55 is spaced from the negative pressure conveying belt 50. The functions of the deflector 54 and the protection plate 55 are the same as those of embodiment 1, and will not be described again.

Further, the negative pressure adsorption type conveying and collecting device further comprises a guiding pinch roller 91 and a supporting riding wheel 92, wherein the guiding pinch roller 91 is arranged at the joint of the transverse conveying part and the vertical conveying part 572 and is used for pressing the edge of the negative pressure conveying belt 50, so that the bending angle of the negative pressure conveying belt 50 at the joint is changed. The supporting roller 92 is disposed at the back side of the negative pressure conveyer belt 50, and is used for supporting and lifting the negative pressure conveyer belt 50.

The working principle of the embodiment 2 of the negative pressure adsorption type conveying and collecting device for the tobacco leaf harvester is as follows, and reference is made to fig. 13.

Tobacco leaves picked by the picking device fall to the area of the negative pressure conveyer belt 50, which is positioned at the transverse conveying part, and along with the rotary motion of the negative pressure conveyer belt 50, when the tobacco leaves are conveyed to the vertical surface of the negative pressure conveyer belt 50, the tobacco leaves are adsorbed on the negative pressure conveyer belt 50 and conveyed along with the negative pressure conveyer belt 50 in the vertical direction, and when the tobacco leaves are conveyed to the top of the negative pressure conveyer belt 50, the air guide blower 81 generates high-pressure air flow, the tobacco leaves change the motion direction under the action of the high-pressure air flow, and then the tobacco leaves enter the tobacco leaf collecting box 42 to complete conveying and collecting work in cooperation with the guiding action of the guide plate 54. As the tobacco harvester continues to travel, more and more tobacco is transported and collected into the tobacco collection bin 42.

Claims (10)

1. Negative pressure adsorption type conveying and collecting device for tobacco harvesting machine is characterized in that: the tobacco leaf conveying device comprises a transverse conveying mechanism, a vertical conveying mechanism and a tobacco leaf collecting box, wherein the transverse conveying mechanism is used for conveying tobacco leaves to one side of the lower part of the vertical conveying mechanism, the vertical conveying mechanism comprises a negative pressure cavity and a negative pressure conveying belt wound around the negative pressure cavity, the adsorption side of the negative pressure cavity is provided with a plurality of first holes, the negative pressure conveying belt is provided with a plurality of second holes, and the negative pressure conveying belt is used for adsorbing the tobacco leaves and conveying the tobacco leaves upwards into the tobacco leaf collecting box; the negative pressure cavity is connected with a negative pressure exhaust pipe, and the other end of the negative pressure exhaust pipe is connected with an air inlet of a negative pressure fan.

2. The negative pressure adsorption type conveying and collecting device for a tobacco harvesting machine according to claim 1, wherein: the transverse conveying mechanism comprises a conveying smooth rod and at least two belt conveying rollers, a strip conveying belt is wound on the belt conveying rollers, and the strip conveying belt is obliquely arranged between the vertical conveying mechanism and the conveying smooth rod.

3. Negative pressure adsorption type conveying and collecting device for tobacco harvesting machine is characterized in that: the tobacco leaf picking device comprises a negative pressure cavity and a negative pressure conveying belt wound around the negative pressure cavity, wherein the adsorption side of the negative pressure cavity is provided with a plurality of first holes, the negative pressure cavity comprises a transverse conveying part and a vertical conveying part which are integrally formed, the negative pressure conveying belt is provided with a plurality of second holes, the second holes are used for adsorbing tobacco leaves, and the negative pressure conveying belt is used for conveying picked tobacco leaves obliquely upwards firstly, then adsorbing the tobacco leaves and conveying the tobacco leaves vertically upwards into a tobacco leaf collecting box; the negative pressure cavity is connected with a negative pressure exhaust pipe, and the other end of the negative pressure exhaust pipe is connected with an air inlet of a negative pressure fan.

4. A negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester according to claim 1 or 3, wherein: the tobacco leaf absorbing device is characterized in that a positive pressure air duct is arranged on one side of the upper portion of the negative pressure cavity, the length direction of the positive pressure air duct is arranged along the front-back direction, the positive pressure air duct is connected with an air outlet of the negative pressure fan, a plurality of air outlet holes are formed in the positive pressure air duct, and the air outlet holes face one side of the negative pressure cavity where tobacco leaves are absorbed.

5. The negative pressure adsorption type conveying and collecting device for a tobacco harvesting machine according to claim 4, wherein: a guide plate is arranged above the negative pressure cavity, so that tobacco leaves are guided and then fall into a tobacco leaf collecting box at the other side of the negative pressure cavity.

6. A negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester according to claim 1 or 3, wherein: and a guide fan is arranged at one side of the upper part of the negative pressure cavity, and the length direction of the guide fan is arranged along the front-back direction.

7. A negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester according to claim 1 or 3, wherein: and a protection plate is arranged on one side of the negative pressure cavity, which adsorbs tobacco leaves, and the protection plate and the negative pressure conveyer belt are arranged at intervals.

8. A negative pressure adsorption type conveying and collecting device for a tobacco harvesting machine according to claim 3, wherein: the negative pressure adsorption type conveying and collecting device further comprises a guide pinch roller and a supporting riding wheel, wherein the guide pinch roller is arranged at the joint of the transverse conveying part and the vertical conveying part and used for pressing the edge of the negative pressure conveying belt, and the supporting riding wheel is arranged on the back side of the negative pressure conveying belt and used for supporting the negative pressure conveying belt.

9. A negative pressure adsorption type conveying and collecting device for a tobacco leaf harvester according to claim 1 or 3, wherein: the tobacco leaf collecting box comprises a main frame body and a side cover plate, wherein the main frame body is detachably connected with the side cover plate, the main frame body is detachably connected with a frame of the harvester, and the upper part of the main frame body is provided with an opening.

10. The negative pressure adsorption type conveying and collecting device for a tobacco harvesting machine according to claim 9, wherein: the main frame body is provided with a side opening towards one side of the side cover plate, and the edge of the side opening is connected with the side cover plate through a hasp structure.