CN213914723U - Combined cleaning sieve with impurity removal and anti-blocking functions - Google Patents

Abstract

The utility model belongs to the technical field of grain cleaning equipment, in particular to a combined cleaning sieve with impurity removal and anti-blocking functions; firstly, grains enter a cylindrical cleaning sieve in a combined cleaning sieve from a feed inlet, a vibrating sieve is arranged right below the cylindrical sieve, and the grains fall onto the sieve surface of the vibrating sieve inclining downwards through the sieving of the cylindrical sieve; the small impurities are screened by the vibrating screen and flow out from a small impurity outlet, and the grains flow out from a grain unloading opening; when the grains pass through the vertical air suction duct, the vertical air suction duct separates light impurities from the grains, the light impurities are sucked into the pulse dust collector, the pulse dust collector separates the light impurities from the gas mixed with the light impurities, and finally the light impurities are discharged from the light impurities outlet through the impurity discharging mechanism; the utility model discloses the form of arranging the material to the auger edgewise provides the second grade and carries, prevents that light and miscellaneous from blockking up in carrying the auger, has improved the conveying capacity and the transport efficiency of auger, and single load of carrying the auger is little, carries intensity height.

Description

Combined cleaning sieve with impurity removal and anti-blocking functions

Technical Field

The utility model belongs to the technical field of grain cleaning equipment, concretely relates to combination clearance sieve with stifled function is prevented to edulcoration.

Background

Grain is reaping, transportation, sunning etc. in-process, can contain many impurity in the grain, these impurity generally include dust, silt, stone, metal slag etc. and root, stem, leaf, shell etc. of some plants in addition, these impurity and grain are stored or are processed together, generally will get rid of these impurity, along with the development of agricultural science and technology, the volume of grain is very big, traditional manual work mode can't satisfy the requirement yet, consequently the current mode of carrying out the edulcoration to grain is generally through the clearance machine of mechanical type.

The existing device for cleaning grains generally utilizes a cleaning sieve for sieving, but the device has a simple structure and a single processing object, can not remove impurities aiming at various impurities in the grains, has a single function, and can not meet the requirements of people, meanwhile, when the existing device is used, the conveying auger is positioned at the bottom of the equipment, because the equipment such as a frame, wheels and the like is arranged at the bottom of the conveying auger, the bottom of the conveying auger can not discharge materials, and the bottom discharging operation space is small, the conveying mode of the existing auger is generally side discharging, but the discharging mode has a free end at the tail end of a rotating shaft of the auger, the auger is a long shaft when the device is used, the motor drives the rotating shaft to rotate, the tail end swings, particularly when the conveying power is large, the swing amplitude is increased, so that the conveying auger can only convey at a slower speed, the blockage is easy to occur, and conveying blades of the auger can collide with side walls in the conveying process, the noise is large, and the abrasion is serious; meanwhile, the unstable rotation of the rotating shaft brings extra torsional force to the driving motor, the driving motor is greatly damaged, the stability is poor, and troubles are brought to people, so that the research on the combined cleaning sieve with the impurity removal and anti-blocking functions is necessary.

Disclosure of Invention

Defect and problem to existing equipment existence, the utility model provides a combination clearance sieve with stifled function is prevented to edulcoration, the effectual transport auger that exists of having solved among the existing equipment takes place easily to block up, the big noise, wearing and tearing seriously and the poor problem of edulcoration screening ability in transportation process.

The utility model provides a scheme that its technical problem adopted is: a combined cleaning sieve with impurity removal and anti-blocking functions comprises a feed inlet, a cylindrical sieve, a vibrating sieve, a pulse dust collector, a vertical air suction channel and an impurity removing mechanism; the grain enters the cylindrical sieve from the feed inlet, large impurities are separated from the grain by the screening, the large impurities flow out through the large impurities outlet, the grain passes through the sieve mesh and falls onto the sieve surface of the vibrating sieve, the vibrating sieve separates small impurities from the grain, the small impurities flow out from the small impurities outlet, the vertical air suction channel is vertically arranged, the bottom of the vertical air suction channel is positioned at the tail end of the grain unloading port, the top of the vertical air suction channel is communicated with the air inlet of the pulse dust collector, when the grain is discharged from the grain unloading port, the light impurities are separated from the grain by the vertical air suction channel, the light impurities are sucked into the pulse dust collector, and the bottom of the pulse dust collector is provided with a light impurities outlet; the impurity removing mechanism comprises a synchronous driving motor, a transmission case, a primary conveying auger, a secondary conveying auger and a material receiving port; the bottom of the light impurity outlet is provided with a primary conveying channel communicated with the impurity discharging hopper; the lower part of the primary conveying channel is provided with a secondary conveying channel communicated with the primary conveying channel, the starting end of the secondary conveying channel is positioned in the middle of the primary conveying channel, so that a Z-shaped conveying channel is formed, and the material receiving port is positioned at the tail end of the secondary conveying channel; synchronous drive motor is connected with the input shaft transmission of transmission case, and the upper portion and the lower part of transmission case set up the same one-level output shaft and the second grade output shaft of direction of rotation respectively, the auger is carried to the one-level and the second grade is carried the auger and is connected with one-level output shaft and second grade output shaft transmission respectively, and the pivot both ends that the auger was carried to the one-level are all installed on one-level transfer passage through the bearing, and the blade that the auger was carried to the one-level extends to second grade transfer passage's top from the one-level delivery shaft, and the middle part of the pivot that the auger was carried to the second grade is installed on second grade transfer passage's lateral wall through the bearing to carry the auger to cut apart into the transmission section of outer hourglass and the transport section that is located second grade transfer passage with the second grade, the end of carrying the section is the free end.

Furthermore, the output quantity per unit time of the first-stage conveying auger is smaller than that of the second-stage conveying auger.

Furthermore, the upper part of the material receiving opening is provided with a plugging plate through a torsion spring.

Further, the synchronous driving motor is arranged at the lower part of the primary conveying channel.

Further, the transmission case is a gear case.

Furthermore, a driving wheel, a first-stage driven wheel and a second-stage driven wheel are arranged in the transmission case; the driving wheel is in transmission connection with the synchronous driving motor, the driving wheel is provided with a composite wheel, and the composite wheel is synchronously connected with the first-stage driven wheel and the second-stage driven wheel through belts.

The utility model has the advantages that: the utility model is mainly applied to screening with grains, firstly, grains enter a cylindrical cleaning sieve in a combined cleaning sieve from a feed port, the grains do centrifugal motion in the inclined cylindrical sieve, and the large impurities are separated from the grains, are retained in the cylindrical sieve and flow out from a large impurity outlet at the bottom of the cylindrical sieve; the vibrating screen is arranged right below the cylindrical screen, and grains pass through screen holes of the cylindrical screen and fall onto the screen surface of the vibrating screen inclining downwards; under the vibration of the vibrating screen, the small impurities flow out of the screen holes of the vibrating screen and the small impurity outlets, and the grains flow out of the grain unloading openings; when the grain flows out from the grain unloading opening, the vertical air draft channel separates light impurities from the grain, the light impurities are sucked into the pulse dust collector, the pulse dust collector separates the light impurities from the air, and finally the light impurities are discharged from the light impurities outlet through the impurity discharging mechanism.

Light impurities are generally light impurities, such as corn leaves, wheat bran and the like; current mode is for utilizing the auger to discharge light miscellaneous, because current structural problem, there is the hindrance auger bottom, like frame, wheel etc. and bottom operation space is little, and the discharge gate of auger can only set up at the end, to this type of demand, the utility model provides a carry out the structure of discharging miscellaneous material to the side of the auger.

The specific impurity removing mechanism is provided with a first-stage conveying auger and a second-stage conveying auger, wherein the first-stage conveying auger is positioned at the upper part, rotating shafts at two ends of the first-stage conveying auger are both arranged on the impurity discharging hopper through bearings, and a conveying blade of the first-stage conveying auger only extends to the middle part from a driving end, namely the front end is a conveying section, and the rear section is a transmission connecting section; the second-stage conveying auger is positioned at the lower part of the first-stage conveying auger, the front end of the second-stage conveying auger is a transmission connecting section and is positioned outside the conveying channel, the rear section of the second-stage conveying auger is a conveying section and is in butt joint with the conveying section of the first-stage conveying auger to form complete conveying transmission, the middle part of the second-stage conveying auger is arranged on the side wall of the conveying channel through a bearing, and the tail end of the second-stage conveying auger is a free end, so that the length of the free section of the auger is greatly shortened, and the conveying stability of the auger is improved.

Simultaneously the utility model discloses divide into two-stage transport with the transport, the one-level is carried the auger and is lasted to the pay-off of second grade transport auger, the light miscellaneous that the one-level was carried the auger and is directly dropped to second grade transport auger is carried simultaneously to second grade transport auger, because the equal semi-axis setting of the transport blade of every auger, thereby the load on every auger has been alleviateed, the transport intensity of auger has been improved, prevent that light miscellaneous winding from forming the jam on the auger, avoid the auger to appear blocking, cause the damage to the motor, and have stronger conveying ability in the face of a large amount of light miscellaneous, can be quick discharge the light miscellaneous in the pulse dust collector, avoid light miscellaneous piling up in the pulse dust collector (light miscellaneous is mostly, easily float, it causes its ability of handling impurity to descend in the pulse dust collector to accumulate in a large number), light miscellaneous treatment effeciency has been improved; novel structure prevents that light miscellaneous from blockking up in carrying the auger, arranges the material for carrying the auger from the side and provides equipment support.

Therefore, the utility model discloses novel structure carries out the form of arranging the material to the auger edgewise and provides the second grade and carries, prevents that the material from blockking up in carrying the auger, has improved the conveying capacity and the conveying efficiency of auger, just the utility model discloses the transport blade to carrying the auger is the semi-axis setting, and single load of carrying the auger is little, only can synchronous drive two carry the auger through a motor, and equipment cost is low, and conveying strength is high, and convenient to use has reduced the shut down number of times of equipment operation, has improved work efficiency, has huge economy and social.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a bottom view of fig. 1.

Fig. 4 is a schematic view of a connection structure of the pulse dust collector and the impurity removing mechanism.

Fig. 5 is a side view of fig. 4.

Fig. 6 is a schematic view of the internal structure of fig. 4.

Fig. 7 is a top view of fig. 4.

Fig. 8 is a schematic structural view of the impurity removing mechanism.

Fig. 9 is a schematic structural diagram of the prior art.

FIG. 10 is a schematic structural view of example 4.

The reference numbers in the figures are: the device comprises a feeding hopper 1, a cylindrical screen 2, a vibrating screen 3, a large impurity outlet 4, a small impurity outlet 5, a vertical air suction duct 6, a light impurity outlet 7, a pulse dust collector 8, a synchronous driving motor 9, a transmission case 10, a first-stage conveying channel 11, a first-stage conveying auger 12, a second-stage conveying channel 13, a second-stage conveying auger 14, a transmission section 15, a conveying section 16, a plugging plate 17, a swinging plate 18, a spring 19, a shifting plate 20 and a fixing rod 21.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1: this embodiment aims at providing a combination clearance sieve with stifled function is prevented in edulcoration, the screening process of mainly used grain, to the multiple impurity that grain includes, if big miscellaneous, great granule etc., little miscellaneous, less silt etc., the light, the stem leaf of plant etc., this embodiment is to above-mentioned impurity, corresponding screening and discharge structure have been set up respectively, the function is various, the edulcoration is effectual, simultaneously to the easy jam that exists when carrying the discharge of auger side, the big scheduling problem of noise, this embodiment provides a arrange miscellaneous mechanism, ensure to carry the auger can be from the stable and efficient row of material of side.

As shown in figure 1, the combined cleaning sieve with the impurity removal and blockage prevention functions comprises a feeding hole 1, a cylindrical sieve 2, a vibrating sieve 3, a pulse dust collector 8, a vertical air suction channel 6 and an impurity removal mechanism; feed inlet 1 sets up the right side upper portion in the frame, feed inlet 1 and the decurrent drum sieve 2 intercommunication of slope, shale shaker 3 slope sets up the lower part at drum sieve 2, and the slope range of shale shaker 3 is greater than the slope range of drum sieve 1, the end of shale shaker 3 is close to the frame bottom basically, the perpendicular wind channel 6 that induced drafts is located the end of shale shaker 3, the perpendicular wind channel 6 is vertical setting basically along, its upper portion and pulse dust collector 8's air intake intercommunication, pulse dust collector 8 sits in the frame, the light miscellaneous export 7 of its bottom is provided with arranges miscellaneous mechanism, arrange miscellaneous mechanism and be located the bottom of frame, be provided with the removal wheel in the frame.

Grains enter the cylindrical screen 2 from the feed inlet 1, large impurities are screened from the grains, the large impurities flow out through a large impurity outlet 7, and the large impurity outlet 7 is arranged at the tail end of the cylindrical screen 2 and is vertically and downwards arranged on the rack; grains pass through the sieve pores of the cylindrical sieve 2 and fall onto the sieve surface of the vibrating sieve 3, the vibrating sieve 3 sieves small impurities out of the grains, and the small impurities flow out from a small impurity outlet 5, wherein the small impurity outlet 5 is arranged at the bottom of the vibrating sieve 3; the vertical air suction duct 6 is vertically arranged, the bottom of the vertical air suction duct is positioned at the tail end of the grain unloading port, the top of the vertical air suction duct is communicated with an air inlet of the pulse dust collector 8, when grains are discharged from the grain unloading port through the vertical air suction duct, light impurities are separated from the grains through the vertical air suction duct, the light impurities are sucked into the pulse dust collector, and the impurity discharging mechanism is arranged at the bottom of the light impurities outlet 6 of the pulse dust collector.

This embodiment has set up big miscellaneous, little miscellaneous and light miscellaneous discharge structure from this, can realize the screening to three kinds of impurity step by step, and it is high to select separately the precision, and the function is various, and sustainable reinforced realizes the quick edulcoration of grain, compact structure, convenient to use.

The trash discharging mechanism is generally a conveying auger, the conveying auger can only discharge trash from the end part due to structural limitation, but in the existing structure, the tail end of the conveying auger is a free end, a support or a support is often added to fix a bearing by adding the bearing in the middle or other internal positions, which will cause the blockage of an internal conveying channel, although the auger is stably conveyed, the blockage of the position where the bearing is added can be caused by impurities, therefore, the conveying auger is generally only provided with the bearing on one side connected with a motor in a transmission way, the end part of the conveying auger is the free end, when the structure is used, the tail end of the conveying auger is free, the conveying auger can only convey the trash at a small rotating speed, the high speed can cause the large swinging amplitude of the tail end, the motor is greatly damaged, the trash is easily accumulated in the conveying channel, and the serious blockage is caused.

Therefore, the embodiment provides two-stage conveying, and as shown in the figure, the impurity removing mechanism comprises a synchronous driving motor 9, a transmission case 10, a first-stage conveying auger 12, a second-stage conveying auger 14 and a material receiving port; the bottom of the light impurity outlet 7 is provided with a primary conveying channel 11 communicated with the light impurity outlet 7; a secondary conveying channel 13 communicated with the primary conveying channel 11 is arranged at the lower part of the primary conveying channel 11, the starting end of the secondary conveying channel 13 is positioned in the middle of the primary conveying channel 11, so that a Z-shaped conveying channel is formed, and the material receiving port is positioned at the tail end of the secondary conveying channel 13; the first-level conveying channel 11 receives the discharge amount of half of the light impurity outlet 7, and the second-level conveying channel receives the discharge amount of the other half and the conveying amount of the first-level conveying auger.

Synchronous driving motor 9 is connected with the input shaft transmission of transmission case 10, and transmission case 10 is the gear box, and the upper portion and the lower part of gear box set up the same one-level output shaft of direction of rotation and second grade output shaft respectively, auger 12 is carried to the one-level and second grade carry auger 14 to be connected with one-level output shaft and second grade output shaft transmission respectively, and the pivot both ends that auger 12 was carried to the one-level are all installed on one-level transfer passage through the bearing, and the blade that auger was carried to the one-level extends to second grade transfer passage's top from one-level delivery shaft, and the middle part of auger 14's pivot is carried to the second grade is installed on second grade transfer passage's lateral wall through the bearing to carry the auger to cut apart into outer transmission section 15 that leaks and be located second grade transfer passage's transport section 16 with the second grade, the end of transport section 16 is the free end.

The tail end of the secondary conveying channel is provided with a material receiving port extending out of the light impurity outlet 7, and meanwhile, a plugging plate 17 is installed on the upper portion of the material receiving port through a torsion spring so as to conveniently receive materials and plug the secondary conveying channel when the secondary conveying channel is not used.

Therefore, in the embodiment, the two ends of the first-stage conveying auger are respectively provided with a bearing, the middle part and the transmission end part of the second-stage conveying auger are respectively provided with a bearing, the tail end of the second-stage conveying auger is a free end, so that the length of the free section of the conveying auger is shortened to be half of the original length, and the two bearings are used for reinforcing, so that the stability of the second-stage conveying auger is ensured, meanwhile, the conveying blade of the first-stage conveying auger is only arranged on a half shaft, namely a right half shaft is an optical shaft, so that only the function of reinforcing transmission is born, the conveying blade which actually bears the load and does work is a left half shaft, the second-stage conveying auger is opposite, so that the left half shaft conveying blade of the first-stage conveying auger is butted with the right half shaft conveying blade of the second-stage conveying auger, the basic length is the same as that of the existing conveying blade, so that the carrying load of the two conveying augers is basically halved and is easier to be driven, therefore, the conveying efficiency can be improved by allowing the two conveying augers to improve the conveying speed, the materials can be discharged out of the pulse dust collector in time, the processing speed of the light impurities in the pulse dust collector is improved, and the light impurities are prevented from being accumulated in the pulse dust collector to cause the reduction of the capability of processing the light impurities.

Meanwhile, the length of the free section of the second-stage conveying auger is greatly shortened and is reinforced by the middle bearing and the bearing at the transmission end, so that the free end is prevented from swinging greatly, and noise and equipment abrasion are reduced.

Example 2: this example is substantially the same as example 1, except that: this embodiment further defines the primary conveying auger 12 and the secondary conveying auger 14.

The output quantity of the primary conveying auger 12 in unit time is less than that of the secondary conveying auger 14 in unit time; the power output proportion of the first-stage conveying auger and the second-stage conveying auger is adjusted according to the load capacity adaptability of the first-stage conveying auger and the second-stage conveying auger, the power output by the motor is reasonably utilized, and the situation that the first-stage conveying auger outputs too fast and the second-stage conveying auger cannot discharge sundries in time to form blockage is avoided; the mode of adjusting the output flow per unit time can be adjusted by changing the size of the output blade or changing the rotating speed of the output auger.

Meanwhile, a driving wheel, a primary driven wheel and a secondary driven wheel are arranged in the transmission case in the embodiment; the driving wheel is in transmission connection with the synchronous driving motor, the driving wheel is provided with a composite wheel, the composite wheel is synchronously in belt connection with the primary driven wheel and the secondary driven wheel through belts, and the primary driven wheel and the secondary driven wheel are in transmission connection with the primary output shaft and the secondary output shaft respectively; the output power ratio of the primary conveying auger and the secondary conveying auger can be adjusted by adjusting the wheel diameter ratio of the composite wheel, the primary driven wheel and the secondary driven wheel.

Meanwhile, the transmission section 15 and the conveying section 16 of the second-stage output auger in the embodiment are two independent shafts respectively, and the two shafts are connected through a pin shaft.

In the embodiment, the distance between the conveying blades can be changed, and when the rotating speeds of the first-stage conveying auger and the second-stage conveying auger are the same, the distance between the conveying blades of the first-stage conveying auger and the second-stage conveying auger can be changed to adjust the output of the first-stage conveying auger and the second-stage conveying auger in unit time.

Example 3: this example is substantially the same as example 1, except that: the present embodiment further defines the mounting manner of the synchronous drive motor.

The synchronous driving motor is arranged at the lower part of the primary conveying channel; in the embodiment, the left side of the secondary conveying channel and the lower part of the primary conveying channel form an equipment installation area, the synchronous driving motor is arranged in the equipment installation area, meanwhile, the equipment installation area provides an installation area for a transmission shaft of the secondary conveying auger, the structure is compact, and the occupied area of equipment is saved.

Example 4: this example is substantially the same as example 1, except that: the structure of the first-level conveying auger of the embodiment is further explained.

As shown in fig. 10, when a large amount of light impurities are discharged from the pulse dust collector, due to the pushing of the conveying blade of the first-stage conveying auger, a certain amount of light impurities are accumulated between the end of the first-stage conveying blade and the side wall of the pulse dust collector, so that light impurities are accumulated at the right half shaft of the first-stage conveying auger, and the materials are overhead at the right half shaft along with the extrusion conveying of the conveying blade, for this purpose, a swing plate 18 is arranged at the rotating shaft of the end of the first-stage conveying auger, a fixed rod 21 is arranged at the upper part of the rotating shaft of the first-stage conveying auger, a material shifting plate 20 is rotatably sleeved at the end of the fixed rod 21, a limiting plate is arranged at the root of the fixed rod 21, a spring 19 is arranged between the limiting plate and the material shifting plate 20, if the accumulation is cleared, the light impurities can extrude the material shifting plate from the side surface, due to the positioning of the limiting plate, the material shifting plate corresponds to the swing plate, and the material shifting plate partially coincide with each other, thereby the rotation of balance weight can drive the flitch swing certainly, breaks up from the root of piling up the material, just can collapsite after the material root loses the impetus, and then reaches the function of preventing blocking up.

Claims (6)

1. The utility model provides a combination clearance sieve with stifled function is prevented in edulcoration which characterized in that: comprises a feed inlet, a cylindrical screen, a vibrating screen, a pulse dust collector, a vertical air suction channel and an impurity removing mechanism; the grain enters the cylindrical sieve from the feed inlet, large impurities are separated from the grain by the screening, the large impurities flow out through the large impurities outlet, the grain passes through the sieve mesh and falls onto the sieve surface of the vibrating sieve, the vibrating sieve separates small impurities from the grain, the small impurities flow out from the small impurities outlet, the vertical air suction channel is vertically arranged, the bottom of the vertical air suction channel is positioned at the tail end of the grain unloading port, the top of the vertical air suction channel is communicated with the air inlet of the pulse dust collector, when the grain is discharged from the grain unloading port, the light impurities are separated from the grain by the vertical air suction channel, the light impurities are sucked into the pulse dust collector, and the bottom of the pulse dust collector is provided with a light impurities outlet; the impurity removing mechanism comprises a synchronous driving motor, a transmission case, a primary conveying auger, a secondary conveying auger and a material receiving port; the bottom of the light impurity outlet is provided with a primary conveying channel communicated with the impurity discharging hopper; the lower part of the primary conveying channel is provided with a secondary conveying channel communicated with the primary conveying channel, the starting end of the secondary conveying channel is positioned in the middle of the primary conveying channel, so that a Z-shaped conveying channel is formed, and the material receiving port is positioned at the tail end of the secondary conveying channel; synchronous drive motor is connected with the input shaft transmission of transmission case, and the upper portion and the lower part of transmission case set up the same one-level output shaft and the second grade output shaft of direction of rotation respectively, the auger is carried to the one-level and the second grade is carried the auger and is connected with one-level output shaft and second grade output shaft transmission respectively, and the pivot both ends that the auger was carried to the one-level are all installed on one-level transfer passage through the bearing, and the blade that the auger was carried to the one-level extends to second grade transfer passage's top from the one-level delivery shaft, and the middle part of the pivot that the auger was carried to the second grade is installed on second grade transfer passage's lateral wall through the bearing to carry the auger to cut apart into the transmission section of outer hourglass and the transport section that is located second grade transfer passage with the second grade, the end of carrying the section is the free end.

2. The combined cleaning sieve with impurity removal and anti-blocking functions as claimed in claim 1, wherein: the unit time output quantity of the first-stage conveying auger is smaller than that of the second-stage conveying auger.

3. The combined cleaning sieve with impurity removal and anti-blocking functions as claimed in claim 1, wherein: and the upper part of the material receiving port is provided with a plugging plate through a torsional spring.

4. The combined cleaning sieve with impurity removal and anti-blocking functions as claimed in claim 1, wherein: the synchronous driving motor is arranged at the lower part of the primary conveying channel.

5. The combined cleaning sieve with impurity removal and anti-blocking functions as claimed in claim 1, wherein: the transmission case is a gear case.

6. The combined cleaning sieve with impurity removal and anti-blocking functions as claimed in claim 1, wherein: a driving wheel, a primary driven wheel and a secondary driven wheel are arranged in the transmission case; the driving wheel is in transmission connection with the synchronous driving motor, the driving wheel is provided with a composite wheel, and the composite wheel is synchronously connected with the first-stage driven wheel and the second-stage driven wheel through belts.

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