Material conveying and tensioning adjusting mechanism for compound machine

Abstract

The invention relates to a material conveying and tensioning adjusting mechanism for a compound machine, which comprises a rack, the adjusting driving mechanism is used for driving the tensioning shaft to be close to / away from the conveying belt; the middle area tensioning roller is fixedly connected to the middle of the tensioning shaft; the two edge area tensioning rollers are fixedly connected to the two ends of the tensioning shaft respectively, and each edge area tensioning roller comprises a fixed cylinder and a plurality of movable blocks hinged to the fixed cylinder; the border area adjusting mechanism is used for driving the multiple movable blocks to synchronously expand outwards or retract inwards; a middle area detection roller and two edge area detection rollers; a middle area load sensor and two border area load sensors; and the adjusting controller is configured to control the adjusting driving mechanism and the border area adjusting mechanism to work according to the detection numerical values of the middle area load sensor and the border area load sensors, so that the detection numerical values of the middle area load sensor and the two border area load sensors tend to be consistent. According to the tensioning device, the middle area part and the edge area part of the conveying belt can be independently tensioned and adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of conveying machinery, and in particular to a material conveying tensioning and adjusting mechanism for a compound machine. Background Art

[0002] The hot stamping laminating machine is a mechanical device that combines hot stamping and laminating functions. It is mainly used for decorative hot stamping and laminating of paper, plastic film, leather and other materials. When working, it needs to continuously convey the materials through the conveyor belt, and the conveying process must ensure the conveying accuracy to avoid laminating dislocation affecting product quality.

[0003] The Chinese patent with application number CN202210684449.9 in the related technology proposes a material conveying tensioning adjustment mechanism for a composite machine, including a vertically movable bracket, a driving motor, a roller, a frame, a conveyor belt, a tensioning device and a conveyor belt motor. The conveyor belt is installed on the tensioning device, the conveyor belt motor is connected to the conveyor belt, the frame is fixed on both sides of the conveyor belt, the vertically movable bracket is installed on the frame and is located above the conveyor belt, the driving motor is installed above the vertically movable bracket, the vertically movable bracket moves up and down relative to the frame under the drive of the driving motor, the roller is installed below the vertically movable bracket and is located above the conveyor belt, and also includes a horizontally movable telescopic rod, the horizontally movable telescopic rod is fixed on the frame and is parallel to the conveyor belt, the vertically movable bracket is movably installed on the horizontally movable telescopic rod, and the conveyor belt is tensioned by adjusting the downward pressure of the roller and adjusting the downward pressure of the roller. By moving the roller horizontally, the downward pressure effect of the roller is better and the tensioning force is greater.

[0004] The above-mentioned related technologies have the following defects: during the operation of the conveyor belt, the middle area of ​​the conveyor belt usually bears greater tension and load, which makes the stretching and wear of the middle area of ​​the conveyor belt more serious, and the contact area between the middle area and the roller or driving wheel is larger, and the friction is stronger. Long-term friction will also cause the material aging or deformation of the middle area to accelerate, which makes the middle area of ​​the conveyor belt more prone to relaxation than the side areas. Therefore, when adjusting the tension of the conveyor belt, if the conveyor belt is tensioned as a whole, it is easy to cause the edge areas of the conveyor belt to be over-tightened and aggravated. Damage. Summary of the invention

[0005] In order to improve the problem that when the tension of the entire conveyor belt is adjusted, the edge area of ​​the conveyor belt is easily over-tightened and aggravated by damage, the present application provides a material conveying tensioning adjustment mechanism for a compound machine.

[0006] The material conveying tensioning adjustment mechanism for a composite machine provided in the present application adopts the following technical solution: A material conveying tensioning adjustment mechanism for a composite machine comprises a frame, a conveyor belt is installed on the frame, and the frame is provided with: A tensioning shaft is rotatably mounted on the frame and arranged parallel to the driving roller of the conveyor belt, and is located outside the downward section of the conveyor belt; An adjusting driving mechanism is used to drive the tensioning shaft to approach or move away from the downward section of the conveyor belt; A middle tensioning roller, fixedly connected to the middle of the tensioning shaft; There are two side tensioning rollers, which are fixedly connected to both ends of the tensioning shaft, and include a fixed cylinder fixedly sleeved on the tensioning shaft and a plurality of movable blocks hinged on the fixed cylinder, wherein the movable blocks are located on the side of the fixed cylinder away from the middle tensioning roller, and the plurality of movable blocks are distributed in an evenly spaced circular array around the tensioning shaft and enclose a side tensioning cylinder; A side zone regulating mechanism, used to drive the plurality of movable blocks to expand outwards or retract inwards synchronously; A central detection roller and two side detection rollers, wherein the side detection roller and the central detection roller are both pressed against the outer side of the conveyor belt's downstream section, and the two side detection rollers are arranged at both ends of the central detection roller; A middle area load sensor and two side area load sensors, respectively used to detect the pressing force between the middle area detection roller and the two side area detection rollers and the conveyor belt; and The adjustment controller is configured to control the operation of the adjustment drive mechanism and the operation of the side area adjustment mechanism according to the detection values ​​of the middle area load sensor and the side area load sensors so that the detection values ​​of the middle area load sensor and the two side area load sensors tend to be consistent.

[0007] Furthermore, the border area adjustment mechanism includes: An adjusting cylinder is sleeved on the outer circumference of the tensioning shaft and arranged at intervals; A side area driving member, used for driving the adjusting cylinder to move axially along the tensioning shaft, the side area driving member being control-connected to the adjusting controller; a permanent magnet fixedly connected to a side of the movable block close to the tensioning shaft; and The electromagnet is installed on the peripheral side of one end of the adjusting cylinder extending into the inner side of the edge tensioning cylinder, and the electromagnet repels the permanent magnet by magnetic force after being energized and magnetized; When the outer side surface of the movable block is parallel to the tensioning shaft, the distance between the inner side surface thereof and the tensioning shaft tends to gradually decrease along the direction from the middle to the end of the tensioning shaft.

[0008] Furthermore, the movable block is provided with a limiting groove through the side wall along the circumference of the tensioning shaft, the limiting groove extends axially along the tensioning shaft, and a limiting ring is commonly provided in a plurality of the limiting grooves; When the outer peripheral side of the limiting ring arc surface contacts the outer groove wall of the limiting groove, a gap is formed between the permanent magnet and the outer peripheral wall of the electromagnet.

[0009] Furthermore, a plurality of connecting rods hingedly connected to the outer peripheral wall of the adjusting cylinder are hingedly connected to the limiting ring.

[0010] Furthermore, the edge load sensor control is connected to an auxiliary controller, and the auxiliary controller is connected to the electromagnet control. The auxiliary controller is configured to control the electromagnet to increase the magnetizing current so as to increase the magnetic repulsion of the electromagnet on the permanent magnet when the value detected by the edge load sensor is in a fluctuating form.

[0011] Furthermore, the cross-sectional radius of the middle-zone tensioning roller decreases from its middle to its end.

[0012] Furthermore, the outer diameter of the fixed tube is not greater than the outer diameter of the end of the middle zone tensioning roller, and the minimum outer diameter of the edge zone tensioning tube is smaller than the outer diameter of the fixed tube.

[0013] Furthermore, the outer side surface of the movable block away from one end of the fixed cylinder is a smooth curved surface.

[0014] Furthermore, the regulation controller is configured to: First, the adjustment drive mechanism is controlled to work according to the detection value of the middle zone load sensor, so that the detection value of the middle zone load sensor meets the required conveyor belt tension requirement; Then, the corresponding side area driving member is controlled according to the detection value of the side area load sensor to drive the adjustment cylinder to move, so that the detection value of the side area load sensor is corrected to be consistent with the detection value of the middle area load sensor.

[0015] Furthermore, the tensioning shaft is arranged upstream of the middle area detection roller along the conveying direction of the conveyor belt, and a guide roller located between the tensioning shaft and the middle area detection roller is rotatably arranged on the frame, and the guide roller is pressed against the inner side of the downward section of the conveyor belt.

[0016] In summary, the beneficial technical effects of this application are: 1. During the process of conveying materials with the conveyor belt, the central detection roller and two side detection rollers are pressed against the conveyor belt, and the tension of the conveyor belt is monitored with the help of the central load sensor and two side load sensors. When the conveyor belt is loose, the value detected by the central load sensor is lower than the set value, and the adjustment controller controls the first linear drive member to drive the tensioning axis to move in the direction close to the conveyor belt, so that the central tensioning roller and the conveyor belt are pressed more tightly, until the value detected by the central load sensor meets the set requirements, and the first linear drive member stops working, so that the tension of the central part of the conveyor belt can be automatically adjusted; 2. The tension of the two side areas of the conveyor belt is independently monitored by two side area load sensors. When the detection value of any side area load sensor is greater than the set requirement, the adjustment controller controls the side area adjustment mechanism on the corresponding side to drive the multiple movable blocks at that end to retract synchronously inward to reduce the maximum outer diameter of the side area tensioning tube, thereby reducing the tension of the corresponding side area of ​​the conveyor belt, thereby realizing automatic follow-up adjustment of the side area of ​​the conveyor belt. In this way, by independently adjusting the middle area and side area of ​​the conveyor belt, the tension of each part of the conveyor belt cross section can be kept consistent as much as possible, which can not only ensure the effective and accurate transportation of materials, but also avoid damage to the conveyor belt caused by overall adjustment of the tension; 3. When the value detected by the edge load sensor fluctuates, it means that the magnetic repulsion between the electromagnet and the permanent magnet is insufficient for the movable block to stably support the edge of the conveyor belt. If the position of the adjustment cylinder is adjusted directly, it may lead to over-adjustment. At this time, with the help of the auxiliary controller, the magnetization current of the electromagnet can be increased to increase the magnetic repulsion of the electromagnet on the permanent magnet, ensuring that the movable block can steadily push against the edge of the conveyor belt, and realizing high-precision adjustment of the maximum outer diameter of the tension cylinder in the edge area; 4. By setting the magnetic repulsion between the electromagnet and multiple permanent magnets, the movable block and the adjusting cylinder are not in contact, which can greatly reduce the wear on the adjusting cylinder and the movable block, and avoid the phenomenon of reduced stability when the edge tensioning cylinder rotates; and this magnetic repulsion can also achieve non-rigid tensioning effect of the edge tensioning cylinder surrounded by multiple movable blocks on the edge of the conveyor belt, which can avoid the jamming phenomenon caused by over-tightening of the edge of the conveyor belt and promote stable tensioning of the edge of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a side view of the overall structure of an embodiment of the present application; Figure 3 is along Figure 2 Schematic diagram of the cross-sectional structure along the AA line; Figure 4It is an exploded schematic diagram mainly used to show the edge tension roller of the embodiment of the present application; Figure 5 It is an exploded schematic diagram mainly used to show the central area detection roller and the edge area detection roller of the embodiment of the present application.

[0018] Description of reference numerals: 1. Frame; 11. Conveyor belt; 21. tensioning shaft; 22. shaft frame; 23. first linear drive member; 3. Middle zone tension roller; 4. Edge tensioning roller; 41. Fixed cylinder; 42. Edge tensioning cylinder; 43. Movable block; 431. Limiting groove; 51. Middle area detection roller; 52. Side area detection roller; 53. Roller stand; 61. Middle area load sensor; 62. Side area load sensor; 71. Adjusting cylinder; 72. Side zone driving member; 73. Permanent magnet; 74. Electromagnet; 75. Limiting ring; 8. Guide roller. DETAILED DESCRIPTION

[0019] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0020] The present application embodiment discloses a material conveying tension adjustment mechanism for a compound machine. Figure 1 , Figure 2 and Figure 3 , which comprises a frame 1, on which a conveyor belt 11 is installed, and on which: The tensioning shaft 21 is rotatably mounted on the frame 1 and is arranged parallel to the driving roller of the conveyor belt 11, and is located outside the downward section of the conveyor belt 11; The adjusting driving mechanism is used to drive the tensioning shaft 21 to approach / move away from the downward section of the conveyor belt 11. Specifically, it can be an axis frame 22 for installing the tensioning shaft 21 and a first linear driving member 23 for driving the axis frame 22 to move. The first linear driving member 23 can be a linear motor, an electric push rod, etc.

[0021] The middle tensioning roller 3 is sleeved and fixedly connected to the middle part of the tensioning shaft 21, and is tightly pressed against the outer wall of the middle part of the downward section of the conveyor belt 11; There are two side tensioning rollers 4, which are fixed to both ends of the tensioning shaft 21, respectively, and include a fixed cylinder 41 fixedly sleeved on the tensioning shaft 21 and a plurality of movable blocks 43 hinged on the end surface of the fixed cylinder 41, the movable block 43 is located on the side of the fixed cylinder 41 away from the middle tensioning roller 3, and the plurality of movable blocks 43 are distributed in an evenly spaced circular array around the tensioning shaft 21 and enclose a side tensioning cylinder 42, which is pressed against the outer side wall of the side area of ​​the downward section of the conveyor belt 11; The side zone regulating mechanism is provided with two and is used to drive a plurality of movable blocks 43 at the same end to expand outwards or retract inwards synchronously.

[0022] The middle detection roller 51 and two coaxially arranged side detection rollers 52, the side detection rollers 52 and the middle detection roller 51 are both pressed against the outer side of the downstream section of the conveyor belt 11, and the two side detection rollers 52 are arranged at both ends of the middle detection roller 51, specifically, the middle detection roller 51 is pressed against the outer side wall of the middle section of the downstream section of the conveyor belt 11, and the side detection rollers 52 are pressed against the outer side wall of the side section of the downstream section of the conveyor belt 11; The middle area load sensor 61 and the two side area load sensors 62 are used to detect the pressing force between the middle area detection roller 51 and the two side area detection rollers 52 and the conveyor belt 11, respectively. The middle area load sensor 61 and the side area load sensor 62 can be pressure sensors; and The regulating controller is configured to control the operation of the regulating driving mechanism and the operation of the side regulating mechanism according to the detection values ​​of the middle area load sensor 61 and the side area load sensors 62 so that the detection values ​​of the middle area load sensor 61 and the two side area load sensors 62 tend to be consistent.

[0023] Specifically, the regulation controller is configured as follows: First, the driving mechanism is controlled and adjusted according to the detection value of the middle area load sensor 61, so that the detection value of the middle area load sensor 61 meets the required tension requirement of the conveyor belt 11; for example, the first linear drive member 23 is controlled to drive the tensioning shaft 21 toward the direction close to the conveyor belt 11, so that the middle area tensioning roller 3 on the tensioning shaft 21 is more tightly pressed against the middle area of ​​the conveyor belt 11, thereby increasing the detection value of the middle area load sensor 61.

[0024] Then, according to the detection value of the edge area load sensor 62, the corresponding edge area driving member 72 is controlled to drive the adjusting cylinder 71 to move, so that the detection value of the edge area load sensor 62 is corrected to be consistent with the detection value of the middle area load sensor 61; for example, the edge area adjustment mechanism is controlled to drive multiple movable blocks 43 to retract inward synchronously, so that the degree of tightness between the edge area tensioning cylinder 42 and the edge area of ​​the conveyor belt 11 is reduced, thereby reducing the detection value of the edge area load sensor 62.

[0025] Therefore, in the process of conveying materials by the conveyor belt 11, the middle area detection roller 51 and the two side area detection rollers 52 can be pressed against the conveyor belt 11, and the tension of the conveyor belt 11 can be monitored with the help of the middle area load sensor 61 and the two side area load sensors 62, wherein the detection value of the middle area load sensor 61 is used as the main judgment basis for the tension of the conveyor belt 11. When the conveyor belt 11 is loose, the value detected by the middle area load sensor 61 is lower than the set value, and the adjustment controller controls the first linear drive member 23 to drive the tensioning shaft 21 to move toward the direction close to the conveyor belt 11, so that the middle area tensioning roller 3 and the conveyor belt 11 are pressed closer, until the value detected by the middle area load sensor 61 meets the set requirements, and the first linear drive member 23 stops working, thereby realizing automatic adjustment of the tension of the middle area of ​​the conveyor belt 11.

[0026] Since the slackness of the middle area of ​​the conveyor belt 11 is generally much greater than that of the side areas of the conveyor belt 11, the side areas of the conveyor belt 11 may be over-tightened after the above adjustment, which will aggravate the wear of the conveyor belt 11. To this end, the tension of the two side areas of the conveyor belt 11 is independently monitored by two side area load sensors 62. When the detection value of any side area load sensor 62 is greater than the set requirement, the adjustment controller controls the side area adjustment mechanism on the corresponding side to drive the multiple movable blocks 43 at the end to synchronously retract inward to reduce the maximum outer diameter of the side area tensioning cylinder 42, thereby reducing the tension of the corresponding side area of ​​the conveyor belt 11, thereby realizing automatic follow-up adjustment of the side area of ​​the conveyor belt 11.

[0027] By independently adjusting the middle and side areas of the conveyor belt 11, the tension of each part of the cross section of the conveyor belt 11 can be kept as consistent as possible, which can not only ensure the effective and accurate transportation of materials, but also avoid damage to the conveyor belt 11 when adjusting the tension as a whole.

[0028] In order to achieve stable control of the maximum outer diameter of the rotating side zone tensioning cylinder 42, refer to Figure 3 and Figure 4 The above-mentioned border area regulation agencies include: The adjusting cylinder 71 is sleeved on the outer circumference of the tensioning shaft 21 and is located on the inner circumference of the tensioning cylinder 42 in the side area. The inner wall of the adjusting cylinder 71 is spaced apart from the outer wall of the tensioning shaft 21. Specifically, the portion of the tensioning shaft 21 corresponding to the adjusting cylinder 71 is set as a small diameter portion, and the portion corresponding to the tensioning roller 3 in the middle area is set as a large diameter portion, so as to facilitate the setting of the adjusting cylinder 71 in the tensioning cylinder 42 in the side area. The side area driving member 72 is used to drive the adjusting cylinder 71 to move axially along the tensioning shaft 21. The side area driving member 72 is connected to the adjusting controller. Specifically, the side area driving member 72 can be a high-precision linear driving member such as a linear motor and an electric push rod. The driving end of the side area driving member 72 is fixedly connected to the adjusting cylinder 71. The permanent magnet 73 is fixedly connected to one side of the movable block 43 close to the tensioning shaft 21 and is disposed on the movable block 43 along the axial direction of the tensioning shaft 21; and The electromagnet 74 is installed on the peripheral side of one end of the adjusting cylinder 71 extending into the inner side of the edge tensioning cylinder 42. When it is energized and magnetized, the magnetic field generated by the electromagnet toward the outer side repels the magnetic force of the permanent magnet 73. When the outer side surface of the movable block 43 is parallel to the tensioning shaft 21 , the distance between the inner side surface thereof and the tensioning shaft 21 gradually decreases from the middle to the end of the tensioning shaft 21 .

[0029] Therefore, when the adjustment mechanism of the present application is working, the electromagnet 74 is first energized, and the electromagnet 74 is magnetized and generates the same magnetic repulsion force to the permanent magnets 73 on the multiple movable blocks 43, so that the multiple movable blocks 43 successively generate the same pressing force on the edge area of ​​the conveyor belt 11 when rotating with the tensioning shaft 21, so as to ensure the stable tensioning and adjusting effect on the edge area of ​​the conveyor belt 11. In addition, by means of the setting of this magnetic repulsion force, the movable block 43 and the adjustment cylinder 71 are not in contact, which can greatly reduce the wear of the adjustment cylinder 71 and the movable block 43, and avoid the phenomenon of reduced stability when the edge tensioning cylinder 42 rotates; and this magnetic repulsion force can also realize that the tensioning effect of the edge tensioning cylinder 42 surrounded by the multiple movable blocks 43 on the edge area of ​​the conveyor belt 11 is non-rigid tensioning, which can avoid the jamming phenomenon caused by over-tightening of the edge area of ​​the conveyor belt 11, and promote the stable tensioning of the edge area of ​​the conveyor belt 11.

[0030] When it is necessary to adjust the maximum outer diameter of the edge area tensioning cylinder 42, for example, when the detection value of the edge area load sensor 62 is greater than the set requirement, the adjustment controller controls the corresponding edge area driving member 72 to work, so as to drive the adjustment cylinder 71 to move toward the middle of the tensioning shaft 21. At this time, the distance between the electromagnet 74 and the permanent magnet 73 on the movable block 43 is reduced. While keeping the magnitude of the magnetic current of the electromagnet 74 unchanged, the movable block 43 is pushed toward the tensioning shaft 21 during the transportation of the conveyor belt 11, thereby reducing the maximum outer diameter of the edge area tensioning cylinder 42, thereby reducing the degree of tightness of the edge area tensioning cylinder 42 on the edge area of ​​the conveyor belt 11, so as to achieve the effect of reducing the tension of the edge area of ​​the conveyor belt 11.

[0031] Further, in order to improve the instability of the plurality of movable blocks 43 when rotating under the influence of the magnetic repulsion force, refer to Figure 3 and Figure 4 A limiting groove 431 is formed through the side wall of the movable block 43 along the circumferential direction of the tensioning shaft 21. The limiting groove 431 extends axially along the tensioning shaft 21. A limiting ring 75 is formed in the plurality of limiting grooves 431. The groove width of the limiting groove 431 is greater than the outer diameter of the limiting ring 75. When the arc-surface outer peripheral side of the limiting ring 75 contacts the outer groove wall of the limiting groove 431 , a gap exists between the permanent magnet 73 and the outer peripheral wall of the electromagnet 74 .

[0032] In another feasible embodiment, a plurality of connecting rods (not shown in the figure) hinged to the outer peripheral wall of the adjustment tube 71 are also hinged on the limit ring 75 to improve the coaxiality of the limit ring 75 with the adjustment tube 71 when sliding in the plurality of limit grooves 431 .

[0033] Therefore, when the edge area driving member 72 drives the adjusting cylinder 71 to move axially along the tensioning shaft 21, the limiting ring 75 slides in the multiple limiting grooves 431 of the multiple movable blocks 43, and the limiting ring 75 can limit the outward turning angle of the movable block 43, so that the permanent magnet 73 on the movable block 43 will not be excessively turned outward under the action of the magnetic repulsion force between the electromagnets 74 to affect the pushing effect on the conveyor belt 11, so that the edge area tensioning cylinder 42 surrounded by the multiple movable blocks 43 always maintains a complete cylindrical shape; at the same time, because the groove width of the limiting groove 431 is larger than the outer diameter of the limiting ring 75, the limiting ring 75 will not cause a large restriction on the movable block 43 when it moves following the movement of the adjusting cylinder 71, so as to ensure that the magnetic repulsion force between the permanent magnet 73 and the electromagnet 74 effectively controls the turning angle of the movable block 43.

[0034] Moreover, when the arc-shaped outer peripheral side of the limiting ring 75 contacts the outer groove wall of the limiting groove 431, there is a gap between the outer peripheral wall of the permanent magnet 73 and the electromagnet 74, so that when the movable block 43 pushes the edge area of ​​the conveyor belt 11 to form a tensioning effect on the edge area of ​​the conveyor belt 11, the movable block 43 will not turn inward to the point where the permanent magnet 73 contacts the electromagnet 74, thereby avoiding damage caused by contact and sliding between the permanent magnet 73 and the electromagnet 74 that rotate with the tensioning shaft 21.

[0035] Further, see Figure 3 and Figure 5 The edge load sensor 62 is also controlled and connected to an auxiliary controller, which is controlled and connected to the electromagnet 74. The auxiliary controller is configured to control the electromagnet 74 to increase the magnetizing current so as to increase the magnetic repulsion of the electromagnet 74 on the permanent magnet 73 when the value detected by the edge load sensor 62 is in a fluctuating form.

[0036] In this way, when the value detected by the edge load sensor 62 is in a fluctuating form, it means that the magnetic repulsion between the electromagnet 74 and the permanent magnet 73 is not enough for the movable block 43 to stably support the edge of the conveyor belt 11. If the position of the adjustment cylinder 71 is directly adjusted, over-adjustment may result. At this time, with the help of the auxiliary controller, the magnetized current of the electromagnet 74 can be increased to increase the magnetic repulsion of the electromagnet 74 on the permanent magnet 73, thereby ensuring that the movable block 43 steadily pushes against the edge of the conveyor belt 11, and achieving high-precision adjustment of the maximum outer diameter of the edge tensioning cylinder 42.

[0037] In addition, refer to Figure 3 and Figure 4 The cross-sectional radius of the middle tension roller 3 decreases from the middle to the end thereof, the outer diameter of the fixed cylinder 41 is not larger than the outer diameter of the end of the middle tension roller 3, and the minimum outer diameter of the side tension cylinder 42 is smaller than the outer diameter of the fixed cylinder 41, so that the middle tension roller 3 and the side tension cylinders 42 at both ends are generally in a cone-like shape with a thick middle and thin ends, so as to fully adapt to the zoning tensioning effect of the middle and side areas. The outer side surface of the movable block 43 away from the end of the fixed cylinder 41 is a smooth curved surface, so as to increase the contact area between the interactive block and the side area of ​​the conveyor belt 11 when the flip angle is adjusted, so as to ensure the tension adjustment effect of the side area of ​​the conveyor belt 11.

[0038] At the same time, in order to ensure the tensioning and adjusting effect of the middle tensioning roller 3 and the side tensioning cylinders 42 at both ends on the conveyor belt 11, the tensioning shaft 21 is arranged upstream of the middle detection roller 51 along the conveying direction of the conveyor belt 11, and the guide roller 8 located between the tensioning shaft 21 and the middle detection roller 51 is rotatably arranged on the frame 1, and the guide roller 8 is pressed against the inner side of the downward section of the conveyor belt 11, and the guide roller 8 is arranged close to the tensioning shaft 21. In this way, the conveyor belt 11 can be more wrapped around the outer circumference of the middle tensioning roller 3 and the side tensioning cylinder 42, so that the contact area between the conveyor belt 11 and the middle tensioning roller 3 and the side tensioning cylinder 42 is larger, thereby ensuring the adjustment quality of the tension of the conveyor belt 11.

[0039] In addition, refer to Figure 1 and Figure 5 The above-mentioned middle area detection roller 51 and edge area detection roller 52 are elastically installed on the frame 1 through the roller frame 53. A middle area load sensor 61 and an edge area load sensor 62 are arranged between the roller frame 53 and the frame 1. The specific structure is conventional technology and will not be repeated here.

[0040] The implementation principle of a material conveying tension adjustment mechanism for a compound machine in an embodiment of the present application is as follows: During the process of conveying materials by the conveyor belt 11, the middle area detection roller 51 and the two side area detection rollers 52 are pressed against the conveyor belt 11, and the tension of the conveyor belt 11 is monitored with the help of the middle area load sensor 61 and the two side area load sensors 62. When the conveyor belt 11 is loose, the value detected by the middle area load sensor 61 is lower than the set value, and the adjustment controller controls the first linear drive member 23 to drive the tensioning shaft 21 to move toward the conveyor belt 11, so that the middle area tensioning roller 3 and the conveyor belt 11 are pressed more tightly, until the value detected by the middle area load sensor 61 meets the set requirements, and the first linear drive member 23 stops working, so that the tension of the middle area of ​​the conveyor belt 11 can be automatically adjusted.

[0041] Then, the tension of the two side areas of the conveyor belt 11 is independently monitored by two side area load sensors 62. When the detection value of any side area load sensor 62 is greater than the set requirement, the adjustment controller controls the side area adjustment mechanism on the corresponding side to drive the multiple movable blocks 43 at the end to be synchronously retracted inward to reduce the maximum outer diameter of the side area tensioning cylinder 42, thereby reducing the tension of the corresponding side area of ​​the conveyor belt 11, thereby also realizing automatic follow-up adjustment of the side area of ​​the conveyor belt 11. Thus, by independently adjusting the middle area and the side area of ​​the conveyor belt 11, the tension of each part of the cross section of the conveyor belt 11 can be kept consistent as much as possible, which can not only ensure the effective and accurate transportation of materials, but also avoid damage to the conveyor belt 11 caused by the overall adjustment of the tension.

[0042] And when the value detected by the edge load sensor 62 is in a fluctuating form, it means that the magnetic repulsion between the electromagnet 74 and the permanent magnet 73 is not enough for the movable block 43 to stably support the edge of the conveyor belt 11. If the position of the adjustment cylinder 71 is directly adjusted, over-adjustment may result. At this time, with the help of the auxiliary controller, the magnetized current of the electromagnet 74 can be increased to increase the magnetic repulsion of the electromagnet 74 on the permanent magnet 73, ensuring that the movable block 43 steadily pushes against the edge of the conveyor belt 11, thereby achieving high-precision adjustment of the maximum outer diameter of the edge tensioning cylinder 42.

[0043] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A material conveying tensioning adjustment mechanism for a composite machine, comprising a frame (1), a conveyor belt (11) being mounted on the frame (1), characterized in that: The frame (1) is provided with: A tensioning shaft (21) is rotatably mounted on the frame (1) and is arranged parallel to the driving roller of the conveyor belt (11), and is located outside the downward section of the conveyor belt (11); An adjusting driving mechanism is used to drive the tensioning shaft (21) to move closer to / away from the downward section of the conveyor belt (11); A middle tensioning roller (3) fixedly connected to the middle portion of the tensioning shaft (21); Two side tensioning rollers (4) are provided and are respectively fixed to the two ends of the tensioning shaft (21), and include a fixed cylinder (41) fixedly sleeved on the tensioning shaft (21) and a plurality of movable blocks (43) hinged on the fixed cylinder (41), the movable blocks (43) being located on a side of the fixed cylinder (41) away from the middle tensioning roller (3), and the plurality of movable blocks (43) are distributed in an evenly spaced circular array around the tensioning shaft (21) and enclose a side tensioning cylinder (42); A side zone regulating mechanism, used for driving the plurality of movable blocks (43) to expand outwards or retract inwards synchronously; a central detection roller (51) and two side detection rollers (52), wherein the side detection roller (52) and the central detection roller (51) are both tightly pressed against the outer side of the downward section of the conveyor belt (11), and the two side detection rollers (52) are arranged at both ends of the central detection roller (51); A central area load sensor (61) and two side area load sensors (62), respectively used to detect the pressing force between the central area detection roller (51) and the two side area detection rollers (52) and the conveyor belt (11); as well as The regulating controller is configured to control the operation of the regulating drive mechanism and the operation of the side regulating mechanism according to the detection values ​​of the middle area load sensor (61) and the side area load sensors (62) so that the detection values ​​of the middle area load sensor (61) and the two side area load sensors (62) tend to be consistent.

2. The material conveying tensioning adjustment mechanism for a composite machine according to claim 1, characterized in that: The border area regulation mechanism includes: An adjustment cylinder (71) is sleeved on the outer circumference of the tensioning shaft (21) and is arranged at intervals; A side area driving member (72) is used to drive the adjusting cylinder (71) to move axially along the tensioning shaft (21), and the side area driving member (72) is controllably connected to the adjusting controller; a permanent magnet (73) fixedly connected to a side of the movable block (43) close to the tensioning shaft (21); and An electromagnet (74) is mounted on the peripheral side of one end of the adjusting cylinder (71) extending into the inner side of the edge tensioning cylinder (42), and is magnetically repelled from the permanent magnet (73) when energized and magnetized; When the outer side surface of the movable block (43) is parallel to the tensioning shaft (21), the distance between its inner side surface and the tensioning shaft (21) tends to gradually decrease along the direction from the middle to the end of the tensioning shaft (21).

3. The material conveying tensioning adjustment mechanism for a composite machine according to claim 2, characterized in that: The movable block (43) is provided with a limiting groove (431) extending through a circumferential side wall of the tensioning shaft (21); the limiting groove (431) extends axially along the tensioning shaft (21); and a limiting ring (75) is provided in a plurality of the limiting grooves (431); When the arc-surface outer peripheral side of the limiting ring (75) contacts the outer groove wall of the limiting groove (431), a gap exists between the permanent magnet (73) and the outer peripheral wall of the electromagnet (74).

4. The material conveying tensioning adjustment mechanism for a composite machine according to claim 3, characterized in that: A plurality of connecting rods are hingedly connected to the limiting ring (75) and are hingedly connected to the outer peripheral wall of the adjusting cylinder (71).

5. The material conveying tensioning adjustment mechanism for a compound machine according to claim 2, characterized in that: The edge load sensor (62) is control-connected to an auxiliary controller, and the auxiliary controller is control-connected to the electromagnet (74). The auxiliary controller is configured to control the electromagnet (74) to increase the magnetizing current when the value detected by the edge load sensor (62) is in a fluctuating form so as to increase the magnetic repulsion force of the electromagnet (74) on the permanent magnet (73).

6. The material conveying tensioning adjustment mechanism for a compound machine according to any one of claims 1 to 5, characterized in that: The cross-sectional radius of the middle zone tensioning roller (3) decreases from its middle to its end.

7. The material conveying tensioning adjustment mechanism for a compound machine according to claim 6, characterized in that: The outer diameter of the fixed cylinder (41) is not greater than the outer diameter of the end of the middle zone tensioning roller (3), and the minimum outer diameter of the edge zone tensioning cylinder (42) is smaller than the outer diameter of the fixed cylinder (41).

8. The material conveying tensioning adjustment mechanism for a compound machine according to claim 6, characterized in that: The outer side surface of the movable block (43) at one end away from the fixed cylinder (41) is a smooth curved surface.

9. The material conveying tensioning adjustment mechanism for a compound machine according to claim 2, characterized in that: The regulation controller is configured to: First, the adjustment drive mechanism is controlled to operate according to the detection value of the middle area load sensor (61), so that the detection value of the middle area load sensor (61) meets the required tension requirement of the conveyor belt (11); Then, according to the detection value of the side area load sensor (62), the corresponding side area driving member (72) is controlled to drive the adjustment cylinder (71) to move, so that the detection value of the side area load sensor (62) is corrected to be consistent with the detection value of the middle area load sensor (61).

10. The material conveying tensioning adjustment mechanism for a compound machine according to claim 1, characterized in that: The tensioning shaft (21) is arranged upstream of the middle zone detection roller (51) along the conveying direction of the conveyor belt (11), and a guide roller (8) is rotatably arranged on the frame (1) and is located between the tensioning shaft (21) and the middle zone detection roller (51), and the guide roller (8) is pressed against the inner side of the downward section of the conveyor belt (11).

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