CN209736072U - Intelligent cleaning system - Google Patents

Abstract

The utility model relates to an intelligence system of cleaning belongs to agricultural machine technical field. The system comprises a shaking plate, a vibrating screen, a fan, a sensor and an intelligent control circuit; the groove-shaped main body of the vibrating screen is fixedly connected with the front and rear hinged supports respectively; the sieve plate is hinged between the front hinge support and the rear hinge support and is hinged with one end of the electric cylinder, and the other end of the electric cylinder is hinged with one side of the sieve plate; the rotating shaft of the fan is in transmission connection with the adjusting motor through a mechanical speed change mechanism; the signal output end of each sensor is connected with the corresponding detection signal input end of the intelligent control circuit, and the corresponding control signal output end of the intelligent control circuit is respectively connected with the controlled end of the electric cylinder and the controlled end of the regulating motor. The utility model can realize the leveling of the sieve plate when the machine body of the grain harvester inclines left and right; meanwhile, the air quantity adjustment is realized by regulating and controlling the rotating speed of the fan, the material slipping and accumulation trends of the grain harvester during up-slope and down-slope operation are compensated, and the harvesting quality during operation in hilly areas is ensured.

Description

Intelligent cleaning system

Technical Field

the utility model relates to a cleaning system of grain harvester, concretely relates to intelligence cleaning system belongs to agricultural machine technical field.

Background

to the applicant's knowledge, grain harvesters are widely used, and cleaning performance is an important measure of the operating performance of the harvester, since the harvest loss is mainly due to cleaning losses. At present, most of grain harvesters are used with air-screen type cleaning systems, and the mixture of harvested and threshed grains, short stalks, glumes and the like enters a cleaning device, and is separated under the reciprocating motion of screen plates, and light impurities are removed by utilizing the difference of suspension speed.

The cleaning devices are various in types, and Chinese patent documents such as ZL201620406662.3, ZL201310189210.5, ZL201510607324.6, ZL201510720903.1, ZL201210250990.5 and the like respectively disclose cleaning devices with various characteristics such as an air screen cleaning device for a self-propelled longitudinal double-axial flow millet combine harvester.

However, when crop harvesting is carried out in hilly areas, these cleaning plants have a problem that cleaning loss is significantly increased due to poor flatness of cultivated land and a large number of fields with slopes. Because, under the effect of the dead weight of the harvested grains, when the body of the combined harvester inclines left and right, the vibrating screen can incline left and right along with the grain, and therefore materials are accumulated to one side. When the harvester operates in a downhill field, materials are accumulated towards the front part of the sieve sheet, so that the sieve sheet is difficult to play a normal sieving role; when the harvester operates in the field on the upward slope, the materials are easy to slide and the rear parts of the sieve sheets are quickly discharged. The result can lead to cleaning loss increase because normal and sufficient screening can not be ensured.

Disclosure of Invention

The utility model aims to provide a: aiming at the problems in the prior art, the intelligent cleaning system capable of keeping the materials on the sieve sheets to be screened in a basically flat state no matter the grain harvester works on the upward slope or the downward slope or the left slope or the right slope of the machine body is provided, and meanwhile, the corresponding cleaning method is provided, so that the screening loss is reduced as much as possible, and the harvesting quality of the grain harvester when the grain harvester works in hilly areas is ensured.

In order to achieve the above purpose, the utility model discloses a basic technical scheme is: an intelligent cleaning system comprises a shaking plate positioned below a concave plate screen, a vibrating screen connected with the output end of the shaking plate, and a fan positioned at the input end of the vibrating screen; also comprises a sensor and an intelligent control circuit;

The vibrating screen comprises a groove-shaped main body fixedly connected with the rack, and the front part and the middle part of the groove-shaped main body are fixedly connected with a front hinged support and a rear hinged support respectively; a sieve plate is hinged between the front hinged support and the rear hinged support; one of the front hinged support and the rear hinged support is also hinged with one end of an electric cylinder, and the other end of the electric cylinder is hinged with one side of the sieve plate;

the middle part and the lower end of the groove-shaped main body are hinged with the upper end of a swinging crutch of the frame, and the middle part of the swinging crutch drives an eccentric wheel driven by a vibration motor to form a crank rocker mechanism through a connecting arm; the front end of the groove-shaped main body is hinged with the lower end of a linkage crutch, the middle of the linkage crutch is hinged with the lower end of a frame, the upper end of the linkage crutch is hinged with the middle bottom of a shaking plate, and one end of the shaking plate is hinged on the frame through a swinging rod;

The rotating shaft of the fan is in transmission connection with the adjusting motor through a mechanical speed change mechanism;

the sensors comprise front, rear, left and right inclination angle sensors arranged on a harvester body, a telescopic distance sensor arranged on one side of the electric cylinder and a rotating speed sensor arranged at a rotating shaft of the fan, signal output ends of the sensors are connected with detection signal input ends corresponding to the intelligent control circuit, and corresponding control signal output ends of the intelligent control circuit are respectively connected with the electric cylinder and a controlled end of the adjusting motor.

the utility model discloses cleaning method of intelligent cleaning system does, intelligent control circuit's intelligent device moves according to following step:

The first step, starting detection, namely after the vibrating screen is started, receiving detection signals from a front inclination angle sensor, a rear inclination angle sensor, a left inclination angle sensor and a right inclination angle sensor, and respectively carrying out the second step and the second step;

Secondly, judging deflection, namely judging whether the left and right inclination angle detection signals exceed a deflection threshold value, if not, returning to the first step to continuously receive the detection signals from the left and right inclination angle sensors, and if so, carrying out a third step;

Thirdly, adjusting and controlling extension, namely adjusting corresponding adjusting distances in a relation table of pre-stored deflection difference values and extension distances according to difference values of the left and right inclination angle detection signals and the slope angle threshold values, and outputting control signals to drive the electric cylinder to extend or retract the adjusting distances;

step four, after the expansion judgment and the preset time interval, receiving a distance signal of an expansion distance sensor, judging whether the corresponding adjustment distance is reached, if not, returning to the step three, and if so, returning to the step one;

Step two, gradient judgment, namely judging whether the front caster angle detection signals and the caster angle detection signals exceed a gradient threshold value, if not, returning to the first step to continue receiving the detection signals from the front caster angle sensor and the caster angle sensor, and if so, performing the step three;

thirdly, adjusting air volume, namely adjusting the corresponding fan rotating speed in a relation table of the prestored inclination angle difference value and the fan air volume rotating speed according to the difference value between the front inclination angle detection signal and the rear inclination angle detection signal and the gradient threshold value, outputting a control signal to drive the adjusting motor to rotate forwards or backwards, and further driving the mechanical speed change mechanism to change the fan rotating speed so as to indirectly adjust the air volume;

and step four, air volume judgment, namely receiving a rotating speed signal of a rotating speed sensor, indirectly judging the air volume of the fan according to whether the rotating speed signal reaches the rotating speed of the corresponding fan, returning to the step three if not, and returning to the first step if yes.

therefore, the utility model can realize the leveling of the sieve plate when the grain harvester body inclines left and right by means of the vibrating sieve with the sieve plate hinged on the groove-shaped main body and the electric cylinder mechanism thereof; meanwhile, the air volume adjustment is realized by regulating and controlling the rotating speed of the fan, the slipping and accumulation trends of materials during the operation of the grain harvester on and off a slope can be compensated, grains are always screened on the screen plates in a basically flattened state, the screening loss is reduced as far as possible, and the harvesting quality of the grain harvester during the operation in hilly areas is ensured.

The relation table of the inclination angle difference and the telescopic distance can be calculated according to the geometric relation of each component of the vibrating screen leveling mechanism, and can also be obtained according to corresponding tests; and the relation table of the deflection difference value and the fan air quantity rotating speed is obtained by a blowing test of the fan air quantity on sieve plates with different inclination angles. During actual regulation, according to detection signals from the left and right inclination angle sensors, the horizontal state of the vibrating screen is directly regulated and controlled by controlling the stretching of the electric cylinder; and according to the detection signals from the front and rear inclination angle sensors, the rotation speed of the fan is changed through a mechanical speed change mechanism by controlling the steering of the adjusting motor, so that the indirect regulation and control of the air quantity of the fan are realized. The direct leveling mechanism of the vibrating screen has simple and reliable structure and convenient regulation and control; the air quantity of the fan is indirectly regulated and controlled by changing the rotating speed through the mechanical speed change mechanism without a speed regulating motor, the transmission torque is large, and the manufacturing cost is low; the utility model discloses a mechanism has not only been simplified in direct and indirect regulation and control combination, has required desensitization effect moreover, can rationally ignore the local unsmooth interference in ground, and is feasible.

Drawings

The present invention will be further described with reference to the accompanying drawings.

fig. 1 (a), (b) and (c) are schematic structural diagrams of three working states of the grain harvester adopting the utility model respectively.

Fig. 2 is a schematic perspective view of an embodiment of the present invention.

Fig. 3 is a schematic perspective view of the self-balancing vibrating screen of the embodiment of fig. 2.

Fig. 4 is a perspective view of the combination of the upper and lower screens of fig. 3.

Fig. 5 is a schematic perspective view of the upper screen of fig. 3.

fig. 6 is a schematic perspective view of the lower screen of fig. 3.

Fig. 7 is a schematic perspective view of the fan speed change mechanism of the embodiment of fig. 2.

fig. 8 is a schematic view of the fan pulley configuration of fig. 7.

Fig. 9 is a schematic view of the drive pulley structure of fig. 7.

fig. 10 is a schematic perspective view of the fastening pulley plate in fig. 9.

FIG. 11 is a block diagram of the intelligent control of the embodiment of FIG. 2.

Fig. 12 is a block diagram of the intelligent control circuit of the embodiment of fig. 2.

FIG. 13 is a logic block diagram of the intelligent control process of FIG. 11.

Detailed Description

The grain harvester of the utility model is adopted in the states of ascending slope, flat ground and descending slope in the figures 1 (a), (b) and (c), the front part is a header, and the middle part is provided with a self-adaptive cleaning device of the grain harvester.

The specific structure of the cleaning device is shown in figure 2, and comprises a shaking plate 3 positioned below a concave plate screen 4, a self-balancing vibrating screen 2 positioned below the output end of the shaking plate 3 and connected with the shaking plate, and an automatic speed regulating fan 1 positioned at the input end of the self-balancing vibrating screen 2. In addition, as shown in fig. 11, a dual-axis tilt sensor (integrated front-rear and left-right tilt sensors) is provided in the cab of the harvester, and the sensor can output front, rear, left and right tilt detection signals as required; settle in the flexible distance sensor of electronic jar one side, this sensor can export electronic jar flexible distance signal to and settle in the tachometric sensor of fan pivot department. The signal output end of each sensor is connected with the corresponding detection signal input end of the intelligent control circuit, and the corresponding control signal output end of the intelligent control circuit is respectively connected with the controlled end of the electric cylinder and the controlled end of the regulating motor.

as shown in fig. 3 and referring to fig. 4, 5 and 6, the front part and the middle part of the groove-shaped main body 5 fixedly connected with the frame are fixedly connected with a T-shaped front hinged support 26 and a cross-shaped rear hinged support 27 respectively. The upper part between the front hinge bracket 26 and the rear hinge bracket 27 is hinged with the position-changing shaft 601 at the middle part of the two ends of the upper screen 6, and the lower part is hinged with the rotating shaft 801 on the lower screen 8, one end of the rotating shaft extends out of the lower screen 8, and the other end is positioned in the bottom surface of the lower screen 8. The top of the cross-shaped rear hinge bracket 27 of this embodiment is hinged to one end of the electric cylinder 7 as an electric cylinder, and the other end of the electric cylinder 7 is hinged to the upper screen frame 603 of the upper screen 6. The upper screen frame 603 has an upper screen 602 fixed therein. The lower screen sheet 804 is fixed in the lower screen frame 802 of the lower screen 8. One side of the upper screen frame 603 and one side of the lower screen frame 802 are respectively provided with a linkage shaft 604 and a linkage pin 803 which are corresponding in position, and the linkage shaft 604 and the linkage pin 803 are respectively hinged with two ends of the connecting rod 28, so that the frame, the upper screen 6, the lower screen 8 and the connecting rod 28 form a parallel four-bar linkage.

The middle part and the lower end of the groove-shaped main body 5 are hinged with the upper end of a swing crutch 29 of the frame, and an eccentric wheel 31 driven by a power source at the middle part of the swing crutch 29 forms a crank rocker mechanism through a connecting arm 30. The front end ear plate of the groove-shaped main body 5 is hinged with the lower end of a linkage crutch 28 with the middle part hinged on the frame, the upper end of the linkage crutch 28 is hinged with the middle bottom of the shaking plate 3, and one end of the shaking plate 3 is hinged on the frame through a swinging rod 32. Therefore, a linkage driving mechanism of the vibrating screen and the shaking plate is formed, and the same power source can simultaneously drive the self-balancing vibrating screen and the shaking plate to do reciprocating motion to screen materials.

in addition, the front parts of the upper sieve 6 and the lower sieve 8 are overlapped up and down, the upper sieve 6 is grown out of the rear part of the lower sieve 8, so that most of the materials which just fall into the lower sieve after being sieved by the upper sieve to continue sieving, the sieving effect is ensured, and a small amount of the materials which are not sieved by the upper sieve fall into the rear part of the lower sieve to be sieved.

Referring to fig. 7 to 10, the rotating shaft of the automatic speed regulation fan 1 of the embodiment is provided with a fan belt wheel 9, and the fan belt wheel 9 is in transmission connection with a driving belt wheel 13 through a V-belt 10. One side of the driving pulley 13 is a fixed pulley sheet 1303 coupled with the rotary power source, and the other side is a sliding pulley sheet 1302 which is sleeved on a spline shaft sleeve of the petal section in the middle of the fixed pulley sheet 1303, and the two sheets form an axial moving pair. The outer end of the sliding pulley piece 1302 is connected with the middle part of the adjusting crutch 12, and the concrete structure of the embodiment is as follows: the outer end of the sliding pulley piece 1302 is sleeved with a bearing 1301, and the circular ring in the middle of the adjusting crank 12 is correspondingly contacted with the inner ring of the bearing 1301, so that the sliding pulley piece 1302 can be axially pushed. One end of the adjusting crutch 12 is hinged with the fixed bracket 15 through a pin 14, the other end is hinged with one end of a linkage rod 16 through a pin 11, and the other end of the linkage rod 16 is hinged with a thread block 21. The screw block 21 and the rotatable driving threaded rod 20 axially constrained by the bearing seat 22 form a screw pair, the screw block 21 extends out of the sliding support block 19 with a smooth hole, and the smooth hole and a smooth rod at the end part of the driving threaded rod 20 form a moving pair, so that a guiding effect is achieved, and the stable translation of the screw block 21 is ensured when the driving threaded rod 20 rotates. The polished rod end of the driving threaded rod 20 is provided with a retainer ring 17 and a gasket 18 which play a role of limiting. The other end of the driving screw rod 20 is provided with a driven gear 23 engaged with a driving gear 24 driven by an adjusting motor 25 so as to be rotated as required by the adjusting motor.

Referring to fig. 8, one side of the fan pulley 9 is a fixed pulley plate 902 fixedly connected with a rotating shaft of the fan, the other side is a sliding pulley plate 903 movably sleeved on a shaft sleeve of the fixed pulley plate 902, and the sliding pulley plate 903 is provided with a set of springs 904 enabling the sliding pulley plate to approach the fixed pulley plate 902 through a long bolt 905, a spacer 906 and a nut 901. The spring 904 has a function of directly causing the sliding pulley piece 903 to tend to approach the fixed pulley piece 902, and also has a function of indirectly causing the sliding pulley piece 1302 to tend to move away from the sliding pulley piece 1302 through the v-belt 10.

referring to fig. 3, the battery E supplies power to the intelligent control circuit C, and the electric cylinder 7 and the adjustment motor 25 are controlled by the intelligent control circuit C which sends out corresponding control signals according to input signals of corresponding sensors S (including a tilt angle sensor, a distance sensor, a rotation speed sensor, and the like). As shown in fig. 12, the main intelligent control circuit uses a single chip microcomputer as a core, and includes a RAM storing a relationship table of a tilt angle difference value and a telescopic distance, a relationship table of a yaw difference value and a fan air volume and rotating speed, and a plurality of sensor detection signal input ports and control output ports, and can be communicated with an upper computer through an ethernet and a serial communication port, and is connected with a liquid crystal screen with alarm and data real-time display functions. The specific circuit configuration is not difficult to design based on the common sense of the prior art, and refer to chinese patent documents such as application nos. 201110100793.0 and 201720077102.2, and thus the detailed description thereof will not be repeated.

The single chip in the intelligent control circuit operates as follows according to the control logic shown in fig. 13:

The method comprises the following steps of firstly, starting detection, namely receiving front and rear inclination angle detection signals, left and right inclination angle detection signals from a double-shaft sensor on a harvester body after the engine power of the harvester simultaneously drives a self-balancing vibrating screen and a shaking plate to do reciprocating motion through a linkage driving and vibrating mechanism to screen materials, and respectively performing the second step and the second step;

Secondly, judging deflection, namely judging whether the left and right inclination angle detection signals exceed a deflection threshold value, namely whether the harvester runs in a left and right inclined mode, if not, returning to the first step to continuously receive the left and right inclination angle detection signals, and if so, carrying out the third step;

thirdly, regulating and controlling extension, namely, according to the difference value between the left inclination angle detection signal and the slope angle threshold value (the left inclination is positive, and the right inclination is negative), calling a corresponding regulation distance in a relation table of the pre-stored deflection difference value and the extension distance, and outputting a control signal to drive the electric cylinder to extend out or retract the called regulation distance so as to enable the hinged vibrating screen to be reversely inclined to compensate deflection of the harvester body;

Fourthly, after stretching judgment, namely after a preset time interval, receiving a distance signal of a stretching distance sensor, judging whether the distance reaches the corresponding adjusted distance to determine whether the vibrating screen is in a horizontal state after compensation, if not, returning to the third step to drive the electric cylinder to continuously extend or retract, and if so, returning to the first step to continuously receive left and right inclination angle detection signals;

Step two, gradient judgment, namely judging whether the front and back inclination angle detection signals exceed gradient threshold values (forward inclination is positive and back inclination is negative), if not, returning to the first step to continue receiving the front and back inclination angle detection signals, and if so, performing the step three;

Thirdly, adjusting air volume, namely adjusting the corresponding fan rotating speed in a relation table between a prestored inclination angle difference value and the fan air volume rotating speed according to the difference value between the front inclination angle detection signal and the rear inclination angle detection signal and the gradient threshold value, outputting a control signal to drive an adjusting motor to rotate forwards or backwards, driving a linkage rod to drive an adjusting crank to move through a spiral pair formed by a driving threaded rod and a threaded block, realizing the adjustment of the transmission ratio of a driving belt wheel and a fan belt wheel, and achieving the purpose of indirectly adjusting the air volume by changing the fan rotating speed according to needs, specifically: the air quantity is increased when the slope is inclined forwards and downwards, and the accumulation trend of materials is inhibited; when the air is inclined backwards to the upper slope, the air quantity is reduced, and the slipping trend of the materials is reduced;

And step four, judging air volume, namely receiving a rotating speed signal of a rotating speed sensor, indirectly judging whether the air volume of the fan reaches a required state according to whether the rotating speed signal reaches the rotating speed of the corresponding fan, if not, returning to the step three, continuously adjusting the air volume to be larger or smaller by driving the adjusting motor to rotate forwards or reversely, if so, returning to the first step, and continuously receiving front and rear inclination angle detection signals.

Experiments show that the grain harvester adopting the embodiment has the following beneficial effects:

1. The upper screen and the lower screen can realize the front-back reciprocating vibration motion together with the vibrating screen main body, and can be automatically turned and adjusted to be kept horizontal when the harvester inclines left and right, and the upper screen and the lower screen are synchronously turned, so that the structure is simple, the power consumption is low, and the influence on the cleaning effect caused by the left and right inclined accumulation of materials is effectively avoided.

2. When the vibrating screen inclines front and back due to the fact that the harvester goes up a slope and goes down a slope, the rotating speed of the cleaning fan can be automatically adjusted: when the machine goes up a slope, the air speed is automatically reduced, the air quantity is reduced, the retention time of materials on the screen surface is increased, the screening effect is ensured, and the loss caused by the fact that the materials are easily blown out of the machine body at the moment is avoided; when the cleaning sieve goes downhill, the wind speed is automatically increased to increase the wind volume, the material is blown to prevent blockage, the accumulation at the front part of the cleaning sieve is avoided, the high grain impurity rate caused by the penetration of impurities through the sieve is prevented, and the cleaning quality is ensured.

3. the upper screen and the lower screen are vertically separated from the front hinged support and the rear hinged support and are hinged after being arranged in a staggered mode, the front hinged support and the rear hinged support are fixed on the vibrating screen main body, the upper screen and the lower screen can freely rotate along with the reciprocating motion of the vibrating screen main body, the structure is simple, the cleaning effect can be guaranteed, the manufacturing cost can be reduced, the weight is reduced, and the overall stability is improved.

4. The driving belt wheel and the fan belt wheel automatically adjust the effective transmission diameter by means of the relative sliding structure of the driving belt wheel and the fan belt wheel so as to adjust the rotating speed of the fan, and the fan belt wheel has the advantages of simple structure, large transmission torque and low manufacturing cost.

5. The leveling of the left-right or front-back inclined vibrating screen and the adjustment of the air quantity of the fan are both controlled by corresponding sensors through closed loops formed by an intelligent control circuit; therefore, the grains can be guaranteed to be always kept on the sieve sheets to be sieved in a basically flattened state after being adjusted, so that sieving loss is reduced as far as possible, and the harvesting quality of the grain harvester in operation in hilly areas is guaranteed.

in a word, adopt this embodiment properly to solve simultaneously that the grain harvester left and right sides slope and the material that the front and back slope leads to piles up the difficult problem, effectively avoided the cleaning loss that consequently leads to, show the efficiency and the operation effect that have improved grain harvest operation, be suitable for the field piece of different slopes.

Claims (6)

1. an intelligent cleaning system comprises a shaking plate positioned below a concave plate screen, a vibrating screen connected with the output end of the shaking plate, and a fan positioned at the input end of the vibrating screen; also comprises a sensor and an intelligent control circuit; the method is characterized in that:

the vibrating screen comprises a groove-shaped main body fixedly connected with the rack, and the front part and the middle part of the groove-shaped main body are fixedly connected with a front hinged support and a rear hinged support respectively; a sieve plate is hinged between the front hinged support and the rear hinged support; one of the front hinged support and the rear hinged support is also hinged with one end of an electric cylinder, and the other end of the electric cylinder is hinged with one side of the sieve plate;

The middle part and the lower end of the groove-shaped main body are hinged with the upper end of a swinging crutch of the frame, and the middle part of the swinging crutch drives an eccentric wheel driven by a vibration motor to form a crank rocker mechanism through a connecting arm; the front end of the groove-shaped main body is hinged with the lower end of a linkage crutch, the middle of the linkage crutch is hinged with the lower end of a frame, the upper end of the linkage crutch is hinged with the middle bottom of a shaking plate, and one end of the shaking plate is hinged on the frame through a swinging rod;

the rotating shaft of the fan is in transmission connection with the adjusting motor through a mechanical speed change mechanism;

the sensors comprise front, rear, left and right inclination angle sensors arranged on a harvester body, a telescopic distance sensor arranged on one side of the electric cylinder and a rotating speed sensor arranged at a rotating shaft of the fan, signal output ends of the sensors are connected with detection signal input ends corresponding to the intelligent control circuit, and corresponding control signal output ends of the intelligent control circuit are respectively connected with the electric cylinder and a controlled end of the adjusting motor.

2. An intelligent cleaning system according to claim 1, characterized in that: the sieve plate comprises an upper sieve and a lower sieve, and the front part and the middle part of the groove-shaped main body are respectively fixedly connected with a T-shaped front hinged support and a cross-shaped rear hinged support; the upper part between the front hinged support and the rear hinged support is respectively hinged with the transposition shafts in the middle parts of the two ends of the upper screen, and the lower part is respectively hinged with the rotating shaft on the lower screen; the top of the rear hinged support is hinged with one end of an electric cylinder, and the other end of the electric cylinder is hinged with one side of the upper screen; one side of the upper screen frame of the upper screen and one side of the lower screen frame of the lower screen are respectively provided with a linkage shaft and a linkage pin which correspond to each other in position, and the linkage shaft and the linkage pin are respectively hinged with two ends of the connecting rod to form a parallel four-bar linkage mechanism.

3. An intelligent cleaning system according to claim 2, characterized in that: the mechanical speed change mechanism comprises a fan belt wheel, and the fan belt wheel is in transmission connection with the driving belt wheel through a V-belt;

One side of the driving belt wheel is provided with a fixed belt wheel sheet coupled with a rotary power source, and the other side of the driving belt wheel is provided with a sliding belt wheel sheet which is sleeved on a shaft sleeve in the middle of the fixed belt wheel sheet in an empty way, and the fixed belt wheel sheet and the sliding belt wheel sheet form an axial moving pair; the outer end of the sliding pulley piece is connected with the middle part of the adjusting crutch, one end of the adjusting crutch is hinged with the fixed bracket, and the other end of the adjusting crutch is hinged with one end of the linkage rod; the other end of the linkage rod is hinged with a thread block, the thread block and an axially constrained rotatable driving threaded rod form a screw pair, and the other end of the driving threaded rod is in transmission connection with an adjusting motor;

One side of the fan belt wheel is provided with a fixed belt wheel sheet fixedly connected with a fan rotating shaft, and the other side of the fan belt wheel is provided with a sliding belt wheel sheet movably sleeved on a fixed belt wheel sheet shaft sleeve; the pulley plate is provided with an elastic member for urging it close to the pulley plate.

4. an intelligent cleaning system according to claim 3, characterized in that: the outer end of the sliding pulley piece is sleeved with a bearing, and the ring in the middle of the adjusting crank is in corresponding contact with the inner ring of the bearing.

5. an intelligent cleaning system according to claim 4, characterized in that: the threaded block extends out of a sliding supporting block with a unthreaded hole, and the unthreaded hole and a polished rod at the end part of the driving threaded rod form a sliding pair.

6. An intelligent cleaning system according to claim 5, characterized in that: the front parts of the upper sieve and the lower sieve are overlapped up and down, and the rear part of the lower sieve is provided with the upper sieve.