CN212049271U - Automatic deviation correcting device of aggregate conveyer belt - Google Patents

Abstract

The utility model provides an automatic deviation correcting device of aggregate conveyer belt belongs to building technical field. Two drive rollers comprising a belt and a traction belt; the roller body is uniformly provided with a plurality of deviation rectifying units in the circumferential direction, each deviation rectifying unit comprises a sliding hole arranged in the roller body, a deviation rectifying shaft is connected in the sliding hole in a sliding mode, the middle of the deviation rectifying shaft is rotatably connected with a deviation rectifying roller, the middle of the deviation rectifying roller can be in contact with a belt pulled on a transmission roller, two ends of the deviation rectifying shaft are respectively and fixedly provided with a trigger ball, and two ends of a return spring respectively abut against the trigger ball and the deviation rectifying roller; the fixed branch that is located the transmission shaft below that is provided with on the mounting bracket, rotate on the branch and be connected with two trigger cylinder, trigger cylinder can support with the limit portion of belt when the belt off tracking and lean on, the last fixed sectorial flywheel that is provided with of trigger cylinder, the flywheel can extrude the trigger ball rather than the homonymy when trigger cylinder is rotatory. The utility model has the advantages of can rectify to the belt.

Description

Automatic deviation correcting device of aggregate conveyer belt

Technical Field

The utility model belongs to the technical field of the building, a automatic deviation correcting device of aggregate conveyer belt is related to.

Background

The concrete is a building material formed by stirring and mixing various aggregates, additives and other materials, and in order to reduce transportation procedures and improve efficiency, various materials are generally required to be conveyed to a specified height or a specified position and then mixed, and because the concrete relates to the conveying of various aggregates with different specifications and types, the cost and the management difficulty are greatly improved if a plurality of conveying lines are adopted; the principle of the zero waiting of mixer, need all carry each aggregate to the assigned position and store, then carry out the weight to it and mix to the mixer in batches, this just needs the transport line endless to carry respectively different aggregates, carry respectively that the tensioning requirement to the conveyer belt is higher, this is because the transportation volume of different aggregates in the unit length on same conveyer belt is different, and its density has great difference, conveyer belt rate of tension has different requirements when leading to transporting different materials, carry respectively that the aggregate keeps in the transfer of material, divide the material, weigh etc. and all have corresponding requirement, though can increase the degree of difficulty like this, but, if the transport distance is far away, adopt many transfer lines again, can improve the cost and the place area occupied of transfer line greatly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an aggregate conveyer belt automatic deviation rectification device to the above-mentioned problem that prior art exists, the utility model aims to solve the technical problem how prevent the conveyer belt off tracking.

The purpose of the utility model can be realized by the following technical proposal: an automatic deviation correcting device for an aggregate conveying belt is characterized by comprising a belt and two driving rollers for pulling the belt; the transmission roller comprises a roller body with the middle diameter smaller than the diameters of two sides, the peripheral surface of the roller body is a curved surface, a transmission shaft is fixedly arranged at the axis of the roller body, the transmission shaft is rotatably connected onto a mounting frame, a plurality of deviation rectifying units are uniformly arranged on the roller body in the circumferential direction, each deviation rectifying unit comprises a sliding hole formed in the roller body, the middle part of each sliding hole penetrates through the peripheral surface of the middle part of the roller body, a deviation rectifying shaft is connected in each sliding hole in a sliding mode, the middle part of each deviation rectifying shaft is rotatably connected with a deviation rectifying roller, the middle part of each deviation rectifying roller can be in contact with a belt pulled on the transmission roller, two ends of each deviation rectifying shaft are respectively and fixedly provided with a trigger ball, two ends of each deviation rectifying roller are respectively provided with a return spring sleeved on the corresponding deviation rectifying shaft, and two; the fixed branch that is located the transmission shaft below that is provided with on the mounting bracket, it is connected with two trigger cylinder to rotate on the branch, trigger cylinder can support with the limit portion of belt when the belt off tracking and lean on, the last fixed sectorial flywheel that is provided with of trigger cylinder, the flywheel can extrude the trigger ball rather than the homonymy when trigger cylinder is rotatory.

In the automatic deviation correcting device for the aggregate conveying belt, the deviation correcting roller is uniformly provided with a plurality of convex ribs which are coaxial with the deviation correcting roller.

Among the prior art, need realize through comparatively complicated electric elements to rectifying of belt, and among the concrete raw materials transportation process, its environment is comparatively abominable, and the structure of rectifying generally sets up in the middle part of belt, is in the high-order, is unfavorable for maintenance and monitoring.

In the scheme, the deviation rectifying and deviation preventing device arranged at the transmission roller is adopted, the structure is simple and reliable, and electronic devices and human interference are not needed; the principle is as follows: when the belt is in the state of being placed in the middle, two edges of the belt do not contact with two trigger rollers, the deviation rectifying roller does not move in the axis direction, the running state of the belt is not interfered, when the belt deviates, the edge of the belt on one side deviates extrudes the trigger roller corresponding to the deviation rectifying roller, so that the trigger roller rotates, namely the flywheel rotates, the flywheel impacts the trigger ball, so that the deviation rectifying roller moves towards the other side, the moving process is performed intermittently, on one hand, a return spring returns the deviation rectifying roller when the deviation rectifying roller rotates to the state of not contacting with the belt, on the other hand, the trigger ball is impacted to be performed intermittently, so that the deviation rectifying roller interferes with the belt, the belt is pushed to be gradually centered, the trigger roller is not extruded by the belt, so that the automatic deviation rectifying of the belt can be realized, and.

The rotation of the deviation rectifying roller in the rotating process and the trigger roller when contacting with the belt can not cause larger resistance to the running of the belt, so that the normal running of the belt can not be influenced, and when the deviation rectifying roller moves in the axis direction to rectify the belt, the convex ribs on the surface of the deviation rectifying roller can increase the friction force with the belt, so that the belt is in point motion to be centered.

Drawings

Fig. 1 is a schematic layout of the units in a concrete production system.

Fig. 2 is a schematic structural view of a two-stage conveyor belt.

Fig. 3 is a cross-sectional view in the direction of intelligence a-a of fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 3.

Fig. 5 is a schematic view of the structure of the belt tensioner.

Fig. 6 is a schematic view of the structure of the belt cleaning apparatus.

Fig. 7 is a sectional view in the direction C-C in fig. 6.

Fig. 8 is a sectional view in the direction D-D in fig. 7.

Fig. 9 is a schematic structural view of an aggregate distribution system.

Fig. 10 is a schematic view of the structure of a suspended weighing device.

Fig. 11 is an exploded view of a suspended weighing apparatus.

Fig. 12 is a top view of the dispensing can.

In the figure, 1, a section of the conveying belt; 2. a second section of conveyor belt; 21. a belt; 22. a driving roller; 23. a support bracket; 24. a cleaning device; 241. cleaning the box; 242. a cleaning chamber; 243. a separation chamber; 244. a first driven wheel; 245. a second driven wheel; 246. cleaning the roller; 247. a separation roller; 2471. a soft traction belt; 2472. a squeegee; 2473. a pulley; 248. a transmission belt; 249. a spray head; 25. a tensioning device; 251. a support frame; 252. a pressure roller; 253. a control shaft; 254. a tensioning arm; 255. a tension roller; 3. a material receiving and distributing device; 31. a material receiving barrel; 32. subpackaging into cans; 33. a distributing hopper; 34. a first stepper motor; 35. a temporary storage cavity; 4. a weighing and blanking mechanism; 41. a support; 42. feeding a hopper; 43. a shutter; 44. a suspension cylinder; 441. a control valve; 45. a guide post; 46. a through groove; 471. a slide bar; 472. a first connecting plate; 473. a second connecting plate; 474. a third connecting plate; 475. a fourth connecting plate; 48. a return spring; 49. an electromagnetic valve; 51. a roller body; 52. a drive shaft; 53. a mounting frame; 54. an axis of rectification; 55. a deviation rectifying roller; 551. a rib is protruded; 56. a trigger ball; 57. a return spring; 58. triggering the roller; 59. a flywheel; 6. a blender.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and fig. 9, the system comprises a first-stage conveyer belt 1, a second-stage conveyer belt 2, a material receiving and distributing device 3, a weighing and blanking mechanism 4 and a stirrer 6, wherein the first end of the first-stage conveyer belt 1 is used for feeding, the first end of the second-stage conveyer belt 2 is used for receiving the tail end of the first-stage conveyer belt, the material receiving and distributing device 3 comprises a material receiving barrel 31, a sub-packaging tank 32, a material distributing hopper 33 and a first stepping motor 34, the tail end of the second-stage conveyer belt 2 is arranged above the material receiving barrel 31, the material distributing hopper 33 is rotatably connected to the lower end of the material receiving barrel 31, a casing of the first stepping motor 34 is fixed on the material receiving barrel 31, the discharge end of the material distributing hopper 33 inclines to one side deviating from the axis of the material receiving barrel 31, a transmission gear ring is arranged on the material distributing hopper 33, a driving gear meshed with the transmission gear ring is fixedly arranged on an output shaft, the unloading mechanism 4 of weighing includes the suspension type weighing device of a plurality of and the chamber 35 one-to-one that keeps in, and the suspension type weighing device can be according to the volume will correspond and keep in the material in the chamber 35 and send into in the mixer 6.

As shown in fig. 1, 9, 10, 11 and 12, the suspension type weighing apparatus includes a support 41 fixed on the ground, a tapered lower hopper 42 connected to an outlet below the temporary storage chamber 35, a door 43 capable of closing the lower hopper 42, and a suspension cylinder 44 located between the support 41 and the lower hopper 42, wherein a plurality of guide posts 45 are fixedly disposed on a lower surface of the door 43, guide holes corresponding to the guide posts 45 are formed on the lower hopper 42, the guide posts 45 are inserted into the guide holes, a through groove 46 is transversely formed in the door 43, a slide rod 471 is inserted into the through groove 46, two ends of the slide rod 471 are respectively connected to the suspension cylinder 44, the rod assembly includes a first connecting rod assembly 472 fixedly connected to an end of the slide rod 471 and perpendicular to the slide rod 471, a second connecting plate 473 parallel to the slide rod 471 is fixedly connected to the first connecting plate 472, the second connecting plate 473 is in a cylindrical shape, the second connecting plate 473 is rotatably connected to the side wall of the lower hopper 42, the second connecting plate 473 is fixedly connected with a third connecting plate 474 which is perpendicular to the second connecting plate 473 and forms an inclination angle of 50-70 degrees with the first connecting plate 472, a fourth connecting plate 475 is rotatably connected to the third connecting plate 474, and the fourth connecting plate 475 is rotatably connected to the outer wall of the hanging cylinder 44; a return spring 48 is connected between the lower end of the suspension cylinder 44 and the support 41 in a stretched state.

The temporary storage chamber 35 is formed by a plurality of partition plates uniformly distributed in the dispensing container 32, preferably four or six partition plates, so that other structures matched with the temporary storage chamber have larger spacing distance to avoid mutual interference, and the rotation axes of the third connecting plate 474 and the fourth connecting plate 475 are parallel to the rotation axis of the fourth connecting plate 475.

Between the support 41 and the suspension cylinder 44, a solenoid valve 49 is provided, the solenoid valve 49 being capable of fixing the suspension cylinder 44 to the support 41 against the restoring force of the return spring 48. A control valve 441 is disposed within the hanging cartridge 44.

The first section of the conveying belt 1 is a feeding filler conveying belt and is vertical to the second section of the conveying belt 2, the second section of the conveying belt 2 is a conveying belt for lifting and changing the material feeding position, the first section of the conveying belt 1 is short and wide, the second section of the conveying belt 2 is longer, and the longitudinal fall is larger. Aggregate such as stones and sand for preparing concrete has higher density, the scheme needs to aim at different aggregates, so that the opening and closing of the temporary storage cavity 35 matched with weighing are difficult to realize, the electromagnetic valve 49 is a magnetic control structure for realizing connection and separation by strong electromagnetic adsorption force, and the electromagnetic valve is wound on the armature through the electrified coil, so that the iron block matched with the electrified coil can be adsorbed by electrifying the electrified coil; because the longitudinal moving space of the suspension cylinder 44 is small, a guide structure can be arranged between the suspension cylinder 44 and the support 41 or not; the control valve 441 is a manual or passive switch structure capable of closing and opening the outlet of the suspension cylinder 44.

In this scheme, connect a hanging section of thick bamboo 44 and lower hopper 42 through two link assembly, its working process is as follows: when the aggregate in the corresponding temporary storage cavity 35 needs to be fed into the mixer 6, the control valve 441 of the corresponding suspension cylinder 44 is closed, the electromagnetic valve 49 corresponding to the temporary storage cavity 35 is disconnected, the support 41 and the suspension cylinder 44 are only connected by the return spring 48, the return force of the return spring 48 drives the suspension cylinder 44 to move upwards, the third connecting plate 474 and the fourth connecting plate 475 are pushed to swing, the second connecting plate 473 which can only rotate rotates is rotated, the sliding rod 471 is longitudinally displaced relative to the second connecting plate 473, the sliding rod 471 pushes the baffle door 43 to move upwards in the through groove 46, the baffle door 43 is longitudinally guided by the guide column 45 to move upwards, a channel which allows the aggregate to fall off the lower hopper 42 is formed between the side wall of the lower hopper 42 and the outer edge of the baffle door 43, the material coming out of the lower hopper 42 enters the suspension cylinder 44, at the moment, the aggregate gradually enters the suspension cylinder 44 until the weight bearing of the return spring 48 is pressed down until the baffle door 43 closes the lower hopper, the electromagnetic valve 49 is opened to enable the suspension cylinder 44 to be connected with the support 41 in an adsorption mode, the control valve 441 is opened when the aggregate needs to be added to the stirring machine 6, the pretightening force of the return spring 48 is controlled, namely the control of the symmetrical weight can be realized by adjusting the longitudinal position in the support 41, the weighing, the waiting, the discharging and the like of different aggregates can be realized repeatedly, the structure is simple, the discharging channel can be continuously changed in the longitudinal moving process of the baffle 43, the actions of coarse discharging, fine discharging, closing, opening and the like of the aggregate are realized, and the blocking of the baffle 43 cannot be caused.

As shown in fig. 1, 2, 3 and 4, the two-stage conveyor belt 2 includes a belt 21, two driving rollers 22 for pulling the belt 21, and a plurality of supporting brackets 23 for supporting the belt 21, the supporting brackets 23 are located between the two driving rollers 22, the supporting brackets 23 are connected to the ground through upright posts, at least one cleaning device 24 for cleaning the belt 21 is arranged between the two driving rollers, at least one tensioning device 25 for tensioning the belt 21 is arranged between the two driving rollers 22, and one of the driving rollers 22 is driven by a driving motor; the transmission roller 22 comprises a roller body 51 with the diameter of the middle part smaller than the diameters of the two sides, the peripheral surface of the roller body 51 is a curved surface, a transmission shaft 52 is fixedly arranged at the axis of the roller body 51, the transmission shaft 52 is rotatably connected to a mounting frame 53, a plurality of deviation rectifying units are uniformly arranged on the roller body 51 in the circumferential direction, each deviation rectifying unit comprises a sliding hole arranged in the roller body 51, the middle part of each sliding hole penetrates through the peripheral surface of the middle part of the roller body 51, a deviation rectifying shaft 54 is slidably connected in each sliding hole, the middle part of each deviation rectifying shaft 54 is rotatably connected with a deviation rectifying roller 55, the middle part of each deviation rectifying roller 55 can be contacted with a belt 21 pulled on the transmission roller 22, two ends of each deviation rectifying shaft 54 are respectively and fixedly provided with a trigger ball 56, two ends of each deviation rectifying roller 55 are respectively provided with a return spring 57; a supporting rod positioned below the transmission shaft 52 is fixedly arranged on the mounting rack 53, two trigger rollers 58 are rotatably connected to the supporting rod, the trigger rollers 58 can abut against the edge of the belt 21 when the belt 21 deviates, a fan-shaped flywheel 59 is fixedly arranged on the trigger rollers 58, and the flywheel 59 can extrude the trigger ball 56 on the same side of the trigger rollers 58 when the trigger rollers 58 rotate.

The deviation rectifying roller 55 is uniformly provided with a plurality of convex ribs 551 which are coaxial with the deviation rectifying roller 55.

Among the prior art, need realize through comparatively complicated electric elements belt 21's the structure of rectifying, and among the concrete raw materials transportation process, its environment is comparatively abominable, and the structure of rectifying generally sets up in belt 21's middle part, is in the high level, is unfavorable for maintenance and monitoring.

In the scheme, the deviation rectifying and deviation preventing device arranged at the transmission roller 22 is adopted, the structure is simple and reliable, and electronic devices and artificial interference are not needed; the principle is as follows: when the belt 21 is in the center state, the two edges of the belt 21 are not contacted with the two triggering rollers 58, the deviation correcting roller 55 does not move in the axial direction, the running state of the belt 21 is not interfered, when the belt 21 is deviated, the edge of the belt 21 on the deviated side presses the trigger roller 58 corresponding thereto, the trigger roller 58 is rotated, namely, the flywheel 59 rotates, the flywheel 59 impacts the trigger ball 56 to make the deviation rectifying shaft 54 move to the other side, the moving process is carried out intermittently, on one hand, the return spring 57 returns the deviation rectifying roller 55 when the deviation rectifying roller 55 rotates to the state that the deviation rectifying roller is not contacted with the belt 21, on the other hand, the trigger ball 56 is impacted intermittently to make the deviation rectifying roller 55 interfere with the belt 21, the belt 21 is pushed to be centered step by step, and the trigger roller 58 is not extruded by the belt 21, so that the automatic deviation rectifying of the belt 21 can be realized without considering active adjustment and interference.

The rotation of the deviation rectifying roller 55 in the rotation process and the trigger roller 58 when contacting the belt 21 will not cause large resistance to the operation of the belt 21, so that the normal operation of the belt 21 will not be affected, and when the deviation rectifying roller 55 moves in the axial direction to rectify the deviation of the belt 21, the convex rib 551 on the surface can increase the friction force with the belt 21, so that the belt 21 is moved to the right.

As shown in fig. 1 and 5, the tensioning device 25 includes a support frame 251, a second stepping motor, two pressing rollers 252 and a control shaft 253 rotatably connected to the support frame 251, the two pressing rollers 252 are both rotatably connected to the support frame 251, the control shaft 253 is located between the two pressing rollers 252, one end of the control shaft 253 is connected to an output shaft of the second stepping motor, a plurality of tensioning arms 254 are fixedly arranged on the control shaft 253, an included angle is formed between adjacent tensioning arms 254, the outer end of each tensioning arm 254 is rotatably connected to one tensioning roller 255, and the distances between each tensioning roller 255 and the control shaft 253 are different; the unloaded leg of the belt 21 passes over two pinch rollers 252 and under one of the tension rollers 255.

Because the second conveyer belt in this scheme need carry different materials, under the same circumstances of carrying the volume, the aggregate of different density is different to supporting the pressure that the position that is in unsettled belt 21 between the support 23 caused, cause the lax degree of belt 21 different, the transport of different aggregates needs different tensile forces in order to ensure that belt 21 rate of tension is moderate, tensioning structure under the effect of current spring, though have simple structure's characteristics, but can influence the pretightning force of spring under the different circumstances of belt 21's bearing, thereby make belt 21's tensile degree change, be unfavorable for multiple material to switch the belt 21 of carrying.

The tensioning device 25 can make the tensioning roller 255 at the outer end of the tensioning arm 254 with proper length press on the lower side surface of the belt 21 by the rotation of the control shaft 253 driven by the second stepping motor when the belt 21 conveys different aggregates, the tensioning arm 254 forms an acute angle with the horizontal plane and inclines towards the conveying direction of the belt 21, the output shaft of the second stepping motor is provided with a torque sensor which detects the torque of the output shaft, when the torque is smaller than a set value, the second stepping motor acts until the second stepping motor stops and locks when the torque reaches the set torque, wherein, it needs to be explained that the stepping motor has a locking function, the torque sensor is the existing means, the detected data of the torque sensor is used as the basis for starting and stopping the second stepping motor, the related unit relating to the torque sensor and the second stepping motor is a controller which compares the data of the torque sensor with the set data, the comparison result is converted into a control signal to control the second stepper motor power circuit, which is well known to those skilled in the art. By the adaptive action of the stepper motor, it is possible to ensure that the belt 21 is under a relatively constant degree of tension.

As shown in fig. 1, 6, 7 and 8, the cleaning device 24 includes a cleaning box 241, a cleaning chamber 242 and a separation chamber 243 are provided in the cleaning box 241, a first driven wheel 244 and a second driven wheel 245 provided above the cleaning chamber 242 are rotatably connected to the cleaning box 241, the first driven wheel 244 and the second driven wheel 245 are respectively provided at the upper and lower sides of the idle section of the belt 21, a cleaning roller 246 is further rotatably connected to the cleaning chamber 242, two separation rollers 247 provided in the separation chamber 243 are rotatably connected to the cleaning box 241, a soft traction belt 2471 is drawn between the two separation rollers 247, a plurality of scraping plates 2472 are uniformly distributed on the outer side surface of the soft traction belt 2471, the scraping plates 2472 are in a mesh structure, the separation chamber 243 is provided at one side of the cleaning chamber 242, the bottom of the cleaning chamber 242 is communicated with the bottom of the separation chamber 243, an inclination angle smaller than 30 ° is provided between the straight section of the soft traction belt 2471 and the horizontal plane, one end, two ends, one end of the first driven wheel 244 and one end of one of the separation rollers 247 are fixedly provided with a belt wheel 2473, the three belt wheels 2473 are positioned on the same side wall of the cleaning box 241, and the three belt wheels 2473 are connected through a transmission belt 248; a plurality of nozzles 249 are arranged in the cleaning cavity 242, each nozzle 249 is connected in parallel and then connected with a water receiving pipe, and the belt 21 is cleaned by water from each nozzle 249 and then contacted with the cleaning roller 246.

The cleaning roller 246 has bristles thereon, and a synchronizing gear is fixedly disposed on each of the first driven wheel 244 and the second driven wheel 245, and the two synchronizing gears are engaged with each other.

The arrangement of the first driven wheel 244 and the second driven wheel 245 ensures that the first driven wheel 244 or the second driven wheel 245 can be driven to rotate by the operation of the belt 21, the diameters of the two synchronous gears are the same, so that the driving belt 248 can be driven to operate no matter the first driven wheel 244 is driven to rotate by the belt 21 or the second driven wheel 245 is driven to rotate by the belt 21, just the cleaning roller 246 can rotate reversely relative to the belt 21, the scraper 2472 below the axis between the two separation rollers 247 moves in a high position, the bottom of the cleaning cavity 242 is communicated with the bottom of the separation cavity 243, the mixture in the cleaning cavity 242 can only flow into the lower part of the soft traction belt 2471 close to the bottom of the separation cavity 243, the scraper 2472 drives the solid material to the outlet at the high position of the cleaning box 241, the water flow to the outlet at the high position of the cleaning box 241, the two outlets are respectively provided with material receiving containers for respectively containing water and the solid material, the device can be reused, and potential safety hazards caused by high-altitude particle dropping and disorder caused to an operation area are eliminated; each nozzle 249 is connected in parallel and then connected with a water receiving pipe, and the water saving pipe is connected with a water pump. The cleaning device 24 is arranged for replacing the aggregates to improve the weighing precision, and is key to prevent the aggregates from being blocked and jammed in the transmission part and reduce the abrasion to each part.

Each support bracket 23 is connected with the ground through a column, and the cleaning box 241, the support bracket 251, the material receiving barrel 31 and the split charging tank 32 are fixedly connected with the column.

Other parts connected with the ground can also be indirectly connected with the ground through the upright posts, and the aggregate entering the stirrer 6 is mixed with a water reducing agent, a reinforcing agent and the like to prepare a concrete pouring mixture.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (2)

1. The utility model provides an automatic deviation correcting device of aggregate conveyer belt, its characterized in that, two driving roller (22) including belt (21) and traction belt (21), driving roller (22) are including middle part diameter less than roll body (51) of both sides diameter, the global curved surface that is of roll body (51), the fixed transmission shaft (52) that is provided with of axis department of roll body (51), transmission shaft (52) rotate to be connected on a mounting bracket (53), circumference evenly is provided with a plurality of units of rectifying on roll body (51), the unit of rectifying is including seting up the slide opening in roll body (51), the global at roll body (51) middle part is run through at the middle part of slide opening, sliding connection has one to rectify axle (54) in the slide opening, the middle part of rectifying axle (54) rotates and is connected with one and rectifies cylinder (55), the middle part of rectifying cylinder (55) can contact with belt (21) of traction on driving roller (22), two ends of the deviation rectifying shaft (54) are respectively and fixedly provided with a trigger ball (56), two ends of the deviation rectifying roller (55) are respectively provided with a return spring (57) sleeved on the deviation rectifying shaft (54), and two ends of the return spring (57) are respectively abutted against the trigger ball (56) and the deviation rectifying roller (55); the fixed branch that is provided with one and is located transmission shaft (52) below on mounting bracket (53), it is connected with two trigger cylinder (58) to rotate on the branch, trigger cylinder (58) can support with the limit portion of belt (21) when belt (21) off tracking and lean on, the fixed sectorial flywheel (59) that is provided with on trigger cylinder (58), flywheel (59) can extrude trigger ball (56) with it homonymy when trigger cylinder (58) are rotatory.

2. The automatic deviation rectifying device of claim 1, wherein a plurality of ribs (551) coaxial with the deviation rectifying roller (55) are uniformly distributed on the deviation rectifying roller (55).

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