CN201345830Y

CN201345830Y - Small cotton picker

Info

Publication number: CN201345830Y
Application number: CNU2009201123889U
Authority: CN
Inventors: 陈勇
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2009-01-09
Filing date: 2009-01-09
Publication date: 2009-11-18
Anticipated expiration: 2019-01-09

Abstract

The utility model discloses a small cotton picking machine, which comprises a centrifugal fan and a motor I driving the centrifugal fan. The air inlet of the centrifugal fan is connected to a picking head through a cotton suction pipe, and a driving motor II is arranged inside the picking head. , the air outlet of the centrifugal fan is connected to the cotton collecting part through the cotton outlet pipe. The picking head includes the casing and the driving roller in the casing, the driven roller and the motor II. The motor II is connected to a gear box to drive the driving roller to rotate, and the gear box is fixed. Connected to one side of the casing, the front end of the casing is provided with a cotton inlet, and the rear end of the casing is provided with a cotton outlet. The cotton inlet corresponds to the driving roller. The driven roller is used for friction transmission, and a guide groove is provided on the casing. Both ends of the driven shaft of the driven roller are connected with an elastic adjustment part, and the driven shaft is embedded in the guide groove to slide through the elastic adjustment part. The utility model adopts a reasonable picking head design to form a set of small cotton picker system with excellent performance.

Description

Small cotton picker

Technical field

The utility model relates to the cotton picker that cotton picking is used in a kind of agricultural production.

Background technology

Small cotton picker is a kind of farm machinery of being badly in need of very much in China's agricultural production, and the economy of each cotton growing area is had very significant meaning.But that is that all right is ripe at present most small cotton pickers, rests on the experimental stage, do not have really can extensive use in agricultural production product.The major technology difficult point that present this class machinery is difficult to large-scale promotion concentrates on the following aspects:

(1) picking efficiency.Adopt cotton by hand according to qualification and working strength difference, its efficient uses its picking efficiency of small cotton picker should reach 120Kg～300Kg/12 hour generally at 60Kg～120Kg/12 hour, just can embody its economic benefit.

(2) percentage of admixture of cotton picking.Its percentage of admixture of cotton that small cotton picker is plucked must reach manual and adopt the cotton level that equates, otherwise can not embody its economic benefit equally.

(3) stream time of cotton picker and reliability.Small cotton picker must be generally three months adopting cotton season, and working time every day is 12 hours, so the minimum failure free time of a small cotton picker 1080 hours (if be 2 years projected life, then minimum failure free time 2160 hours).And its power source must be able to guarantee to provide every day continuous firing 12 hours power.

(4) Cao Zuo convenience.The working time of 12 hours every days for the operator, is a very arduous job.Small cotton picker must can reduce operator's labour intensity when improving picking efficiency.If machine is too heavy, perhaps complicated operation then can lose its use value.

Some cotton pickers adopts blower fan directly to draw the operation principle of cotton in this area, and more typical example is that the patent No. that China national Department of Intellectual Property announces is 200520008820.1,200520017070.5,94208150.1 etc.This class cotton picker must adopt two-stroke or four-stroke gasoline engine, to guarantee enough big power of fan, produces enough big blast at cotton suction duct, can draw cotton smoothly.The problem of its existence has the following aspects:

1, petrolic service life.Can not satisfy one and adopt cotton season minimum failure free time 1080 hour requirement generally at 200～300 hours the no-failure life of two-stroke or four-stroke gasoline engine.

2, too powerful cotton suction duct wind-force can be with boll hull, and impurity such as cotton leaf and other chip suck, and removes impurity mechanism though added in some design, and effect is still not too obvious.

3, the general weight of petrol engine is big, is difficult to bear for a long time, and the Operation and maintenance complexity requires the user must possess the professional knowledge of petrol engine aspect.

4, present domestic put-put is difficult to reach waste gas emission standard, is unfavorable for environmental protection.

In this area also some cotton picker adopted machinery to take off the design that the cotton machine of following the wind send cotton knot to close, more typical example is that the patent No. that China national Department of Intellectual Property announces is 02283899.6,00254844.5,200620075560.4,200520128533.4,200620160278.6 etc.These structures be both economical rationally and can be used for actual, but at present known also really can not solve picking efficiency, the percentage of admixture of cotton picking, the stream time of cotton picker and reliability, and the design of the convenience problem of operation, thereby really energy product practical and that extensively promote does not appear.

The utility model content

The purpose of this utility model is to provide a kind of small cotton picker, and it is low effectively to solve existing cotton picker picking efficiency, the percentage of admixture height, and the cotton picker stream time and the reliability that adopt petrol engine to bring are low, unhandy problem.

In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: small cotton picker, it is characterized in that: comprise centrifugal fan and the motor I that drives centrifugal fan, the air inlet of centrifugal fan connects picking head by cotton suction duct, be provided with the motor II that drives in the picking head, motor I is connected power supply with motor II, and the gas outlet of centrifugal fan connects the cotton parts of collection by cotton-feeding pipe.

Preferably, picking head comprises the drive roll in casing and the casing, driven voller and motor II, casing is connected to form by left casing and right casing, motor II connects a gear-box and drives the drive roll rotation, gear-box is fixedly connected on casing one side, the casing front end is provided with mouth-piece, casing rear end is provided with cotton output port, mouth-piece is corresponding with drive roll, the drive roll outer wall is provided with helical raised, and helical raised props up the driven voller transmission that rubs, and is equipped with a gathering sill on left casing and the right casing, the driven shaft two ends of driven voller all connect flexible adjustment parts, and driven shaft embeds in the gathering sill and slides by the flexible adjustment parts.

Further, gear-box comprises motor gear and driving gear, and motor gear connects motor II, and driving gear connects drive roll by driving shaft, is provided with at least one duplicate gear between motor gear and the driving gear and carries out transmission.

Further, the flexible adjustment parts comprise the spring of a slide block and slide block top, and slide block props up the driven shaft end, and spring one end cross-under is on slide block, and the spring other end props up casing.

Preferably, picking head comprises driving shaft, driven shaft and the motor II in casing and the casing, casing is connected to form by left casing, right casing and cotton suction duct interface, right casing is provided with mouth-piece, motor II connects gear-box drive driving shaft and driven shaft rotates in opposite directions, driving shaft all is connected a cam bawl with driven shaft, and the cam bawl top is corresponding with mouth-piece, and the cam bawl below is corresponding with the cotton suction duct interface.

Further, gear-box comprises motor gear, driving gear and driven gear, motor gear connects motor II, driving gear connects driving shaft, driven gear connects driven shaft, motor gear and driving gear engagement, driving gear and driven gear engagement, thus driving shaft and driven shaft are rotated in opposite directions.

Further, centrifugal fan comprises the centrifugal parts in spiral case and the spiral case, and spiral case is connected to form by left spiral case and right spiral case, and centrifugal parts comprise base plate and are symmetrically distributed at least three centrifugation blades on the base plate.

Preferably, cotton picker also comprises Backpack device, Backpack device comprises becoming the support of bearing of " L " type, bears fixedly connected power supply and centrifugal fan on the support, picking head and collect cotton parts and extend to the place ahead of bearing support by cotton suction duct and cotton-feeding pipe respectively.

Preferably, cotton picker also comprises car-mounted device, and car-mounted device comprises the wheel of vehicle frame, following vehicle frame and following bottom of frame, is provided with support bar between last vehicle frame and the following vehicle frame, the fixedly connected power supply of following vehicle frame, the fixedly connected centrifugal fan of last vehicle frame and the cotton parts of collection.

Further, collect cotton parts and adopt the cotton bag of a collection, the cotton bag of a collection sack place is provided with support, the hook corresponding on the support with last vehicle frame, and the cotton bag of collection hangs on the vehicle frame by hook, and the cotton bag of collection front and back are screen cloth, and both sides are plastic sheet.

The utility model adopts the reasonable picking head design, the blower fan and the power of fan that cooperate optimal design, the long-life motor of high efficiency, the battery of high-energy ratio, and meet bearing and vehicle-mounted structure of ergonomics, form the small cotton picker system of a cover function admirable.It is low that this small cotton picker is plucked loss power, harvesting process cotton breaks away from cotton holder easily, cotton is in the quilt process of plucking, the negative pressure that centrifugal fan produces directly acts on cotton by cotton suction duct, ripe cotton-wool is stretched along the blast direction, avoided in the negative pressure transmittance process because the pressure loss that the parts poor sealing produces has increased the stability of working; Cotton-wool axis phenomenon when two kinds of mechanical picking heads can effectively be avoided collecting cotton, picking head are with cotton-wool interlock and rotation, and cotton separates from the cotton holder thereupon, are inhaled in the cotton parts of collection along flexible pipe, improve picking efficiency; This small cotton picker can adopt backpack, meets the support of bearing of ergonomics, and will collect cotton parts and be located at the operator front, can change the cotton parts of collection easily; This small cotton picker also can adopt vehicular, collect four opening hanging on the vehicle frame are set on the cotton parts, can change the cotton parts of collection equally quickly and easily, collect cotton parts both sides in addition and be provided with plastic sheet, can prevent effectively that dolly from swiping with the cotton branch in moving process, simultaneously dolly is designed to removablely, transports and collect very convenient, can reduce packaging volume in transit; Motor in this small cotton picker preferably adopts the long-life brushless electric machine of high efficiency, can guarantee the stream time and the reliability of cotton picker.This small cotton picker is simple and reliable for structure, and each parts and structure have all been considered the requirement that the working time is long and the life-span is long, are very suitable for the field work of cotton field, cotton growing area, can promote the use of.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing:

Structural representation when Fig. 1 adopts Backpack device for the utility model small cotton picker;

Fig. 2 be among Fig. 1 K to schematic diagram;

Fig. 3 is the structural representation of centrifugal fan in the utility model;

Fig. 4 is the explosive view of picking head mode one in the utility model;

Fig. 5 is the structural representation of picking head mode two in the utility model;

Fig. 6 is the structural representation after casing cooperates among Fig. 5;

Fig. 7 is the explosive view of picking head mode two in the utility model;

Fig. 8 is picking head mode two cam rollers structural representations towards upwards the time;

Fig. 9 is picking head mode two cam rollers structural representations towards in opposite directions the time;

Figure 10 is picking head mode two cam rollers structural representations when downward;

Figure 11 is picking head mode two cam rollers structural representations when opposite;

Figure 12 is the structural representation of car-mounted device in the utility model;

The structural representation of the cotton parts of collection when Figure 13 adopts car-mounted device for the utility model;

Structural representation when Figure 14 adopts car-mounted device for the utility model small cotton picker.

Embodiment

Extremely shown in Figure 14 as Fig. 1, the utility model small cotton picker, comprise centrifugal fan 1, and the motor I 11 that directly drives centrifugal fan 1, centrifugal fan 1 comprises spiral case, and the centrifugal parts in the spiral case, spiral case is connected to form by left spiral case 12 and right spiral case 13, centrifugal parts comprise base plate 14, and be symmetrically distributed at least three centrifugation blades 15 on the base plate 14, centrifugation blade 15 cambers and vertical base plate 14, the air inlet of centrifugal fan 1 connects picking head 2 by cotton suction duct 16, be provided with the motor II 21 that drives in the picking head 2, motor I 11 is connected power supply 6 with motor II 21, motor I 11 and motor II 21 all can adopt DC brush or brushless electric machine, the preferred long brushless electric machine of efficient high life that adopts, can guarantee the stream time and the reliability of cotton picker, the gas outlet of centrifugal fan 1 connects the cotton parts 5 of collection by cotton-feeding pipe 17, cotton suction duct 16 and the cotton-feeding pipe 17 preferred flexible pipes that adopt.The advantage of centrifugal air draught is cotton in the quilt process of plucking, and the blast that centrifugal fan 1 produces directly acts on cotton by cotton suction duct 16, has avoided in the negative pressure transmittance process because the pressure loss that the parts poor sealing produces has increased the stability of working; Owing to centrifugal fan 1 needs cotton through centrifugation blade 15, consider simultaneously, spiral case and centrifugation blade 15 all are optimized design according to the characteristics of cotton, with high efficiency and the rational power consumption that guarantees centrifugal fan 1 for functional reliability; Under the prerequisite that satisfies centrifugal fan 1 efficient, centrifugation blade 15 is designed to both to allow cotton pass through smoothly, can guarantee its working strength and life-span again, so centrifugation blade 15 preferably adopts 3～6.

The structure of picking head 2 modes one is as follows: comprise casing, and the drive roll 24 in the casing, driven voller 25 and motor II 21, casing is connected to form by left casing 22 and right casing 23, motor II 21 connects a gear-box 3 and drives drive roll 24 rotations, gear-box 3 is fixedly connected on casing one side, gear-box 3 comprises motor gear 31 and driving gear 32, motor gear 31 connects motor II 21, driving gear 32 connects drive roll 24 by driving shaft 34, be provided with at least one duplicate gear between motor gear 31 and the driving gear 32 and carry out deceleration transmission, the casing front end is provided with mouth-piece 26, casing rear end is provided with cotton output port 27, mouth-piece 26 is corresponding with drive roll 24, drive roll 24 outer walls are provided with helical raised 241, helical raised 241 props up driven voller 25 transmission that rubs, the helical raised 241 preferred herringbone helical raised 241 that adopt as shown in Figure 4, herringbone helical raised 241 is provided with two at least, also is provided with the equally distributed several cylinders shape small embossment perpendicular to its axis on drive roll 24 outer walls.Be equipped with a gathering sill 28 on left side casing 22 and the right casing 23, driven shaft 35 two ends of driven voller 25 all connect flexible adjustment parts 4, driven shaft 35 embeds in the gathering sill 28 and slides by flexible adjustment parts 4, flexible adjustment parts 4 comprise a slide block 41, and the spring 42 of slide block 41 tops, slide block 41 props up driven shaft 35 ends, spring 42 1 end cross-under are on slide block 41, spring 42 other ends prop up casing, spring 42 is in compressive state all the time, driven shaft 35 can slide in gathering sill 28, further compress spring 42, spring 42 restoring forces promote slide block 41 downwards, and driven voller 25 is against on the herringbone helical raised 241 of drive roll 24 all the time.

Because cotton is not continuous traction in taking off cotton process, adopting under the cotton state, motor I 11 and motor II 21 are connected power supply 6, motor II 21 drives motor gear 31 and rotates, motor gear 31 drives driving gear 32 by duplicate gear and rotates, realize deceleration transmission, driving gear 32 drives drive roll 24 and rotates, herringbone helical raised 241 is along with drive roll 24 rotates together on the drive roll 24, because driven voller 25 is against on the herringbone helical raised 241 of drive roll 24, drive roll 24 drives driven voller 25 by friction and rotates together; Motor I 11 drives centrifugal fan 1 and produces negative pressure at the mouth-piece 26 of casing, when picking head 2 during near the cotton-wool of cotton maturations, cotton-wool is inhaled in the casing, then cotton-wool is clamped by herringbone helical raised 241 on the drive roll 24 and driven voller 25, the rotation of drive roll 24 is slowly pushed from both sides cotton-wool to the centre position, effectively avoided cotton-wool to snap on the axle; In extrusion process, owing to be mingled with cottonseed in the cotton-wool, when driven voller 25 propped up cottonseed, driven shaft 35 upwards moved in gathering sill 28 simultaneously, compression spring 42, and under spring 42 restoring force effects, it promotes slide block 41 makes driven voller 25 prop up cotton-wool all the time.When driven voller 25 is rotated away from wherein a herringbone helical raised 241, cotton-wool promptly is inhaled in the centrifugal fan 1 by cotton suction duct 16, cotton-wool is thrown out of centrifugal fan 1 under the centrifugal action that the centrifugation blade 15 that rotates produces, and arrives the cotton parts 5 of collection by cotton-feeding pipe 17; Be inhaled in the passage that forms between herringbone helical raised 241 and the driven voller 25 with stylish cotton-wool, repeat the cotton step of above-mentioned suction.Adopt the as above characteristics of structure picking head 2 to be that the centre-to-centre spacing between its drive roll 24 and the driven voller 25 can regulate automatically according to the size of cotton, can solve the cotton problem of card well, the while percentage of admixture is low.

The structure of picking head 2 modes two is as follows: comprise casing, and the driving shaft 34 in the casing, driven shaft 35 and motor II 21, casing is by left casing 22, right casing 23 and cotton suction duct 16 interfaces are connected to form, right casing 23 is provided with mouth-piece 26, motor II 21 connects a gear-box 3 drive driving shafts 34 and driven shaft 35 rotates in opposite directions, gear-box 3 comprises motor gear 31, driving gear 32 and driven gear 33, motor gear 31 connects motor II 21, driving gear 32 connects driving shaft 34, driven gear 33 connects driven shaft 35, motor gear 31 and driving gear 32 engagements, driving gear 32 and driven gear 33 engagements, motor gear 31 drives driving gear 32, driving gear 32 drives driven gear 33 rotates driving shaft 34 and driven shaft 35 in opposite directions, driving shaft 34 all is connected a cam bawl 29 with driven shaft 35, the workpiece of cam bawl 29 adopts the material on soft ground to make, can bear elastic deformation to a certain degree, cam bawl 29 rotates symmetrically, cam bawl 29 tops are corresponding with mouth-piece 26, cam bawl 29 belows are corresponding with cotton suction duct interface 18, the workpiece of cam bawl 29 preferably adopts rubber to make, cam bawl 29 produces elastic deformation when the contact cottonseed, cottonseed is passed through smoothly, avoid axis.

Because cotton is not continuous traction in taking off cotton process, adopting under the cotton state, motor I 11 and motor II 21 are connected power supply 6, motor II 21 drives motor gear 31 and rotates, motor gear 31 and driving gear 32 engagements, driving gear 32 connects driving shaft 34, driving gear 32 and driven gear 33 engagements, driven gear 33 connects driven shaft 35, thereby driving gear 32 and driven gear 33 rotate in opposite directions under motor gear 31 drives, and by the transmission of driving shaft 34 and driven shaft 35, promptly realize the rotation of symmetry in opposite directions of two cam bawls 29, cam bawl 29 present positions are maximum gap between two cam bawls 29 as shown in Figure 8.Motor I 11 drives centrifugal fan 1 and produces negative pressure at the mouth-piece 26 of casing, when picking head 2 during near the cotton-wool of cotton maturations, cotton-wool is inhaled in the casing, this moment, cam bawl 29 turned over certain angle position extremely as shown in Figure 9, this moment, cam bawl 29 was lived the cotton-wool interlock, because cam bawl 29 is made for soft ground material, so cotton-wool is the distance that is snapped the unification fixed length in this interlock process, simultaneously because the existence of casing, open boll hull is blocked by casing, cotton-wool is just torn from boll hull by cam like this, and the cotton-wool of this moment also is engaged on the cam bawl 29; When cam bawl 29 turns to as shown in figure 10 the position, cam bawl 29 gets loose to the interlock of cotton, cotton-wool promptly is inhaled in the centrifugal fan 1 by cotton suction duct 16, cotton-wool is thrown out of centrifugal fan 1 under the centrifugal action that the centrifugation blade 15 that rotates produces, and arrives the cotton parts 5 of collection by cotton-feeding pipe 17; To the process shown in Figure 11, new cotton-wool is drawn in the passage between the cam bawl 29 once more, repeats the cotton step of above-mentioned suction from Figure 10.Adopt as above that the characteristics of structure picking head 2 are intermittent exercise mode between the cam bawl 29, can solve the cotton problem of card well equally, percentage of admixture is low simultaneously.

The picking head 2 of above-mentioned dual mode can adopt Backpack device 7 as depicted in figs. 1 and 2 to adopt cotton operation, what Backpack device 7 comprised becoming " L " type bears support 71, bear fixedly connected power supply 6 and centrifugal fan 1 on the support 71, picking head 2 and collect cotton parts 5 and extend to the place ahead of bearing support 71 by cotton suction duct 16 and cotton-feeding pipe 17 respectively.The cotton parts 5 of collection are the cotton bag of a collection when adopting Backpack device 7, and power supply 6 adopts low weight lithium ion battery of weight and centrifugal fan 1 to be incorporated into one to meet the bearing on the support 71 of ergonomics.When realizing that cotton is filled collection cotton bag, can easily change the cotton bag of collection, just must open front to cotton output port 27 at operator's health, taking could be very convenient, this Backpack device 7 can will collect cotton bag by a lanyard and be affiliated in the operator front, dress is got the cotton bag of collection easily, and the size of the cotton bag of collection can freely be chosen according to actual production.

The picking head 2 of above-mentioned dual mode also can adopt as Figure 12 and adopt cotton operation to car-mounted device 8 shown in Figure 14 in addition.Consider from the aspect of economy, power supply 6 can adopt lead-acid battery, but because lead-acid battery volume and quality are all bigger, if it is obviously infeasible to allow the people bear operation, so utilize the car-mounted device 8 that to carry out or to tow just can reduce operator's labour intensity effectively, the line-spacing of the general plantation of cotton is about 40～50cm, and it is wide that car-mounted device 8 can be designed to 30cm～40cm.This car-mounted device 8 comprises vehicle frame 81, following vehicle frame 82, and the wheel 83 of following vehicle frame 82 bottoms, be provided with two support bars 84 between last vehicle frame 81 and the following vehicle frame 82, last vehicle frame 81 and following vehicle frame 82 both sides are equipped with a sleeve pipe 85, support bar 84 two ends embed respectively in the sleeve pipe 85 of vehicle frame 82 up and down, vehicle frame 82 and support bar 84 are fixed together about inciting somebody to action with latch 86 at last, the fixedly connected power supply 6 of following vehicle frame 82 front ends, last vehicle frame 81 fixedly connected centrifugal fans 1 and the cotton parts 5 of collection, collect cotton parts 5 and adopt the cotton bag of a collection, the cotton bag of collection sack place is provided with support 52, support 52 is provided with the hook 51 corresponding with last vehicle frame 81, and the cotton bag of collection hangs on the vehicle frame 81 by linking up with 51.Because the cotton branch can be stretched in two passageways of going between the cottons, plastic sheet 53 is adopted in the cotton bag of the collection left and right sides, and screen cloth 54 is adopted in front and back, can effectively prevent to collect the scraping of cotton bag in the dolly moving process, this car-mounted device is the cotton bag of dismounting collection and pour out cotton apace easily, and is very easy.

Claims

1. A small cotton picker, characterized in that it comprises a centrifugal fan (1) and a motor I (11) that drives the centrifugal fan (1), and the air inlet of the centrifugal fan (1) passes through the The pipe (16) is connected to the picking head (2), and the picking head (2) is provided with a driving motor II (21), the motor I (11) and the motor II (21) are connected to the power supply (6), and the centrifugal The air outlet of formula blower fan (1) is connected cotton collecting part (5) by cotton outlet pipe (17).

2. The small cotton picker according to claim 1, characterized in that: the picking head (2) includes a casing and a driving roller (24), a driven roller (25) and the motor II in the casing (21), the casing is formed by connecting the left casing (22) and the right casing (23), and the motor II (21) is connected to a gear box (3) to drive the driving roller (24) to rotate, so The gear box (3) is fixedly connected to one side of the casing, the front end of the casing is provided with a cotton inlet (26), and the rear end of the casing is provided with a cotton outlet (27). Corresponding to (24), the outer wall of the driving roller (24) is provided with a spiral protrusion (241), and the spiral protrusion (241) resists the driven roller (25) for friction transmission, and the left casing ( 22) and the right casing (23) are provided with a guide groove (28), the two ends of the driven shaft (35) of the driven roller (25) are connected with an elastic adjustment part (4), the driven The shaft (35) is embedded in the guide groove (28) and slides through the elastic adjusting member (4).

3. The small cotton harvester according to claim 2, characterized in that: the gear box (3) includes a motor gear (31) and a driving gear (32), and the motor gear (31) is connected to the motor II (21 ), the driving gear (32) is connected to the driving roller (24) by a driving shaft (34), and at least one double gear is provided between the motor gear (31) and the driving gear (32) for transmission.

4. The small cotton harvester according to claim 2, characterized in that: the elastic adjustment part (4) includes a slider (41) and a spring (42) above the slider (41), the The slide block (41) is against the end of the driven shaft (35), one end of the spring (42) is passed through the slide block (41), and the other end of the spring (42) is against the casing.

5. The small cotton picker according to claim 1, characterized in that: the picking head (2) includes a casing and a driving shaft (34), a driven shaft (35) and the Motor II (21), the casing is formed by connecting the left casing (22), the right casing (23) and the suction pipe (16) interface (18), and the right casing (23) is provided with an inlet Cotton mouth (26), described motor II (21) connects a gear box (3) to drive described driving shaft (34) and driven shaft (35) to rotate oppositely, described driving shaft (34) and driven shaft ( 35) are connected with a cam roller (29), the top of the cam roller (29) corresponds to the cotton inlet (26), and the bottom of the cam roller (29) is connected to the interface (18) of the cotton suction tube (16). correspond.

6. The small cotton harvester according to claim 5, characterized in that: the gear box (3) includes a motor gear (31), a driving gear (32) and a driven gear (33), and the motor gear ( 31) connect motor II (21), described driving gear (32) connects driving shaft (34), described driven gear (33) connects driven shaft (35), described motor gear (31) and driving gear ( 32) meshing, the driving gear (32) meshes with the driven gear (33), so that the driving shaft (34) and the driven shaft (35) rotate oppositely.

7. The small cotton harvester according to claim 1, characterized in that: the centrifugal fan (1) includes a volute and centrifugal components inside the volute, and the volute is formed by the left volute (12) It is connected to the right volute (13), and the centrifugal component includes a bottom plate (14) and at least three centrifugal blades (15) symmetrically distributed on the bottom plate (14).

8. The small cotton picking machine according to any one of claims 1 to 7, characterized in that: the cotton picking machine also includes a carrying device (7), and the carrying device (7) includes an "L" shaped The back support (71), the back support (71) is fixedly connected to the power supply (6) and the centrifugal fan (1), and the picking head (2) and the cotton collection part (5) pass through the cotton suction pipe (16) respectively. ), and the cotton pipe (17) extends to the front of the back support (71).

9. The small cotton picking machine according to any one of claims 1 to 7, characterized in that: the cotton picking machine also includes a vehicle-mounted device (8), and the vehicle-mounted device (8) includes an upper frame (81) , lower frame (82), and the wheel (83) at the bottom of the lower frame (82), a support rod (84) is provided between the upper frame (81) and the lower frame (82), and the lower frame (82) is fixedly connected to the power supply (6), and the upper frame (81) is fixedly connected to the centrifugal fan (1) and the cotton collecting part (5).

10. The small cotton picker according to claim 9, characterized in that: the cotton collecting part (5) adopts a cotton collecting bag, and a bracket (52) is arranged at the opening of the cotton collecting bag, and the bracket (52) is The hook (51) corresponding to the upper frame (81), through which the cotton bag is suspended on the upper frame (81).