A roller rotating retractable conveyor belt

Abstract

The present invention discloses a roller-wound, rotary, retractable conveyor belt, comprising a frame with two telescopic cylinders rotatably mounted at each end of the frame. A driving roller is mounted between the two telescopic cylinders on the same end. A belt is disposed between the two driving rollers to form a conveying surface, and multiple guide rollers and turntables are disposed below the conveying surface. Two turntables are disposed on either side of the belt, and two guide rollers are mounted therebetween to form a roller group. The belt is sequentially mounted on two guide rollers within each roller group. The synchronous movement of the driving rollers and the roller group enables adjustment of the belt height and conveying path length between the two driving rollers. The present invention utilizes multiple linearly arranged guide rollers on the roller group to rotate and retract the belt, thereby increasing the belt's capacity and adjusting the adjustment range. Furthermore, the guide rollers on either side of the belt are rotated to reel or release the belt, adaptively adjusting the position of the driving rollers, and achieving belt size adjustment based on the position of the driving rollers.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyor belts, in particular to a roller rotating retractable conveyor belt, and mainly to the aspect of belt retraction during the conveying path adjustment process of the conveyor belt. Background Art

[0002] Adjustable conveying systems are usually composed of multiple adjustable conveyor belts. The conveying length of the adjustable conveyor belts can be adjusted according to demand, so that when the production line needs to be adjusted to increase efficiency and output, it can be more convenient to reorganize the production line, or based on the requirements of different material handling, the conveying height can be adjusted to switch the material conveying destination equipment, such as low-temperature furnace area, high-temperature furnace area, etc.

[0003] At present, adjustable conveyor belts usually adopt sleeve telescopic conveyor belts, that is, multiple conveyor belts of different specifications are combined in a sleeve manner, so as to form a combined stepped structure conveyor belt after extension, so as to adjust the conveying length and size. The largest-sized conveyor belt is supported by a base and can adjust the tilt angle to adjust the conveying angle. Although this sleeve telescopic conveyor belt can adjust the conveying length and angle, the sleeve telescopic structure usually performs multiple sections of telescopic on the same side. During the telescopic process, the longer the extension length, the more unstable its end is due to the leverage effect. Therefore, for stable use, the sleeve telescopic conveyor belt is usually two or three sections, and its length adjustment range is limited, making it difficult to achieve a wide range of length adjustment. In addition, due to unilateral adjustment, it is difficult to form a two-way adjustment docking in the line, making it difficult to form an adjustable conveying system.

[0004] Therefore, the existing single-side adjustable telescopic conveyor belt is difficult to achieve a wide range of length adjustment due to the limited stability of the single-side adjustment, and it is difficult to adjust in both directions, making it difficult to achieve multi-conveyor belt joint adjustment in the production line to change the route of the conveying system. Summary of the Invention

[0005] The purpose of the present invention is to provide a roller-rotating retractable conveyor belt, specifically to provide a conveyor belt that can realize belt retraction and adaptive conveying path adjustment through a roller belt, so as to solve the technical problems in the prior art that it is difficult to achieve large-scale length adjustment due to limited stability of unilateral adjustment, and it is difficult to adjust in both directions, making it difficult to achieve multi-conveyor belt joint adjustment in the production line to change the route of the conveying system.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A roller-rotating retractable conveyor belt, comprising:

[0008] frame;

[0009] Active rollers, one of which is provided at each end of the frame, and a belt is provided between the two active rollers to form a conveying surface;

[0010] A telescopic cylinder is provided at each shaft end of the active roller, and the other end of the telescopic cylinder is rotatably mounted on the end of the frame. The telescopic cylinders at both ends of the frame adjust the relative position between the two active rollers by telescoping and rotating;

[0011] Guide rollers, wherein a plurality of guide rollers are arranged on the frame along the conveying direction, and the length direction of the guide rollers is consistent with the width direction of the belt. The return section of the belt passes through the gap between each two guide rollers in sequence, and the belt abuts against the surface of each guide roller to increase the total length of the belt;

[0012] A turntable is rotatably arranged on the frame, and a plurality of the turntables are arranged in the conveying direction of the belt, with each two turntables forming a group and being arranged opposite to each other on both sides of the belt width direction, and each two guide rollers are arranged parallel to each other between each group of turntables to form a roller group, and the guide rollers can freely rotate relative to the turntable, and the turntable rotates so that the two guide rollers wind around the belt to increase the total length of the belt;

[0013] The synchronous movement of the driving roller and the roller group can adjust the height of the belt and the length of the conveying path between the two driving rollers.

[0014] As a preferred solution of the present invention, an axis column is provided in the middle of the outer side of each turntable, the turntable is rotatably mounted on the frame through the axis column, and the end of the axis column extends to the outside of the frame, and the turntable can rotate the two guide rollers to release or retract the belt.

[0015] As a preferred solution of the present invention, a worm is provided on the frame, and a plurality of worm wheels are connected to the worm, and the worm drives the plurality of worm wheels to rotate synchronously, and the plurality of worm wheels are respectively mounted on the ends of the plurality of shafts to drive the plurality of roller groups to rotate synchronously;

[0016] An axial pressure sensor is provided at the end of the worm, and is used to detect the axial force of the worm wheel acting on the worm. The tensioning force of the belt acting on the two guide rollers is converted into the rotational force of the roller group and transmitted to the worm wheel;

[0017] The worm is connected to the shaft of the worm's driving motor through the axial pressure sensor, and the driving motor controls the worm according to a comparison result between the detection value of the axial pressure sensor and a preset threshold value.

[0018] As a preferred embodiment of the present invention, two first diameter-expanding rollers are provided on the turntable, and the two first diameter-expanding rollers are respectively arranged on one side of the guide roller facing the opposite direction of rotation of the turntable, and the distance between the first diameter-expanding roller and the axis of the turntable is greater than or equal to the distance between the guide roller and the axis of the turntable, so that when the guide roller is rotated by the turntable to reel in the belt, the first diameter-expanding rollers expand the belt outward to expand the rotatable angle of the turntable;

[0019] Two second diameter-expanding rollers are provided on the turntable, and the two second diameter-expanding rollers are respectively arranged on one side of the guide roller facing the rotation direction of the turntable, and the distance between the second diameter-expanding roller and the axis of the turntable is greater than or equal to the distance between the guide roller and the axis of the turntable, so that when the guide roller is rotated by the turntable to rewind the belt, the second diameter-expanding rollers expand the belt outward for a second time to expand the rotatable angle of the turntable;

[0020] The winding length of the belt is positively correlated with the rotatable angle of the turntable.

[0021] As a preferred solution of the present invention, the cylinder ends of the two telescopic cylinders are rotatably mounted on both sides of the frame, and the shaft end of the active roller is mounted on the cylinder rod ends of the two telescopic cylinders on the same side so as to be rotated and / or telescopically adjusted in position by the telescopic cylinders.

[0022] As a preferred solution of the present invention, two double-headed cylinders are symmetrically arranged on the frame, and the ends of the two cylinder rods of the double-headed cylinders are respectively rotatably mounted on the two telescopic cylinders at different ends on the same side of the frame. The double-headed cylinders are used to extend and push the two telescopic cylinders away from each other, or shorten and pull the two telescopic cylinders towards each other, so as to synchronously adjust the angles of the two telescopic cylinders.

[0023] Wherein, the middle part of the cylinder body of the double-headed cylinder is arranged on the frame to limit the horizontal movement of the cylinder body of the double-headed cylinder.

[0024] As a preferred solution of the present invention, a connecting rod is provided at the end of the cylinder body of the telescopic cylinder. The connecting rod is installed at a fixed angle to the telescopic cylinder and extends downward. The two cylinder rod ends of the double-headed cylinder are movably installed on the two connecting rods on the same side.

[0025] As a preferred solution of the present invention, a groove is provided through the connecting rod, two sliders are symmetrically slidably installed on the inner wall of the groove, and the cylinder rod end of the double-headed cylinder is rotatably installed between the two sliders.

[0026] As a preferred solution of the present invention, the double-headed cylinder includes two cylinder barrels, the two cylinder barrels are fixed to each other, a piston rod is installed in each cylinder barrel, and the two piston rods are oriented in opposite directions;

[0027] An eccentric plate is provided on the end of the piston cylinder rod located outside the cylinder barrel, and an assembly plate is mounted on the eccentric plate. The assembly plate is rotatably mounted between the two sliders, and the two cylinder barrels are symmetrically distributed on the upper and lower sides of the assembly plate so that the assembly plate is located on the symmetrical midline of the two cylinder barrels;

[0028] Wherein, the two piston cylinder rods work independently.

[0029] As a preferred solution of the present invention, a connecting frame is provided at both ends of each active roller, the connecting frame is concave in shape and faces the inner side of the active roller, and a scissor-type telescopic frame is provided between the two connecting frames;

[0030] Wherein, a plurality of auxiliary rollers are provided on the scissor-type telescopic frame, and the plurality of auxiliary rollers are used to support the belt between the two active rollers;

[0031] A support rod is provided on each pin shaft of the scissor-type telescopic frame, a roller bracket is provided on each support rod, and the auxiliary roller is rotatably mounted on the roller bracket, and the auxiliary roller abuts against the bottom surface of the belt located between the two active rollers.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention forms a storage area for storing the belt by rotating the guide rollers on a plurality of linearly arranged roller groups to reel in the belt, thereby increasing the belt's capacity and increasing the adjustment range. The guide rollers on both sides of the belt are reeled in or released by rotating the roller group, thereby adaptively adjusting the position of the active roller and achieving the belt size being adjustable based on the position of the active roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0035] Figure 1 A schematic structural diagram of a roller-rotating retractable conveyor belt provided in an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the structure of a roller assembly of a roller-rotating retractable conveyor belt provided in an embodiment of the present invention;

[0037] Figure 3A schematic structural diagram of the guide roller portion of a roller-rotating retractable conveyor belt provided in an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the structure of a scissor-type telescopic frame of a roller-rotating retractable conveyor belt provided in an embodiment of the present invention;

[0039] Figure 5 This is a schematic structural diagram of the double-head cylinder portion of the roller rotating retractable conveyor belt provided in an embodiment of the present invention.

[0040] The numbers in the figure represent the following:

[0041] 1-frame; 2-driving roller; 3-roller group; 4-worm;

[0042] 11-Telescopic cylinder; 12-Double-head cylinder; 13-Connecting rod; 21-Belt; 22-Connecting frame; 23-Scissor-type telescopic frame; 24-Auxiliary roller; 31-Guide roller; 32-Turntable; 33-Axis column; 34-First expansion roller; 35-Second expansion roller; 41-Worm gear; 42-Axial pressure sensor;

[0043] 121 - cylinder barrel; 122 - piston rod; 123 - eccentric plate; 124 - assembly plate; 131 - groove; 132 - slider; 231 - support rod; 232 - roller bracket. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] like Figure 1 As shown, the present invention provides a roller-rolled rotating retractable conveyor belt, comprising:

[0046] Rack 1;

[0047] Active roller 2: an active roller 2 is provided at each end of the frame 1, and a belt 21 is provided between the two active rollers 2 to form a conveying surface;

[0048] A telescopic cylinder 11 is provided at each axial end of the active roller 2, and the other end of the telescopic cylinder 11 is rotatably mounted on the end of the frame 1. The telescopic cylinders 11 at both ends of the frame 1 adjust the relative position between the two active rollers 2 by telescoping and rotating.

[0049] Specifically:

[0050] When the two telescopic cylinders 11 rotate upward, the two driving rollers 2 rise, raising the conveying path (i.e., the conveying surface) of the belt 21. The distance between the two driving rollers 2 decreases, shortening the conveying path. During this process, if the telescopic cylinders 11 extend, the distance between the two driving rollers 2 remains constant or increases, raising the conveying path while maintaining or increasing its length. Alternatively, if the telescopic cylinders 11 contract, the distance between the two driving rollers 2 decreases, raising the conveying path while further shortening it.

[0051] When the two telescopic cylinders 11 rotate downward, the two driving rollers 2 descend, lowering the conveying path of the belt 21. The distance between the two driving rollers 2 increases, lengthening the conveying path. During this process, if the telescopic cylinders 11 are shortened, the distance between the two driving rollers 2 remains constant or decreases, lowering the conveying path while maintaining or shortening its length. Alternatively, if the telescopic cylinders 11 are extended, the distance between the two driving rollers 2 increases, lowering the conveying path while further lengthening it.

[0052] Also includes:

[0053] Guide rollers 31: Multiple guide rollers 31 are provided on the frame 1 along the conveying direction, and their length direction is consistent with the width direction of the belt 21. The return section of the belt 21 passes through the gap between every two guide rollers 31 in sequence, and the belt 21 abuts against the surface of each guide roller 31 to increase the total length of the belt 21.

[0054] A turntable 32 is rotatably mounted on the frame 1. A plurality of turntables 32 are arranged in the conveying direction of the belt 21. Two turntables 32 are arranged in a group, and are respectively arranged opposite to each other on both sides of the width direction of the belt 21. Two guide rollers 31 are arranged parallel to each other between each group of turntables 32 to form a roller group 3. The guide rollers 31 can freely rotate relative to the turntable 32. The turntable 32 rotates so that the two guide rollers 31 wind around the belt 21 to increase the total length of the belt 21.

[0055] The synchronous movement of the driving roller 2 and the roller group 3 can adjust the height and the conveying path length of the belt 21 between the two driving rollers 2.

[0056] Specifically, the belt 21 passes through one of the guide rollers 31 of the first roller group 3 and passes out in the opposite direction from the other guide roller 31, passes through one of the guide rollers 31 of the second roller group 3 and passes out in the opposite direction from the other guide roller 31, and is sequentially inserted into the guide rollers 31 of all the roller groups 3, so that the belt 21 is bent multiple times in the roller group 3 to increase its length.

[0057] When the two guide rollers 31 of each roller set 3 are rotated by the turntable 32 until the belt 21 between them is horizontal, the conveying path can be adjusted to its maximum length. Furthermore, when the two guide rollers 31 of each roller set 3 are rotated by the turntable 32 so that the belt 21 is wound around them from a horizontal position, the angle of rotation of the turntable 32 does not exceed 150 degrees, and preferably does not exceed 90 degrees. This prevents the belts 21 on the guide rollers 31 of adjacent roller sets 3 from contacting or interfering with each other.

[0058] By adjusting the multiple roller groups 3, the length of the conveying surface can be changed to the maximum extent, and the multiple roller groups 3 can be independently controlled or synchronously controlled.

[0059] The turntable 32 can be manually controlled to rotate and then manually fixed or locked for adjustment, or it can be controlled to rotate by a driving device.

[0060] Specifically, when adjusting the length and height of the conveying path, each turntable 32 is unlocked first. Then, when the driven roller 2 is adjusted in position by the telescopic cylinder 11, the two guide rollers 31 located in the roller group 3 are pulled by the belt 21, so that the two guide rollers 31 release the belt. When the adjustment is completed, the telescopic cylinder 11 is locked, and then the turntable 32 is rotated to make the two guide rollers 31 wind up the belt 21 therein to maintain tension.

[0061] The present invention aims to form a storage area for storing the belt 21 by rotating the guide rollers 31 on a plurality of linearly arranged roller groups 3 to reel in the belt 21, so as to increase the capacity of the belt 21 and realize an increase in the adjustment range, and by rotating the roller group 3 to make the guide rollers 31 on both sides of the belt 21 reel in or release the belt 21, so as to adaptively adjust the position of the active roller 2, so as to realize that the size of the belt 21 can be adjusted and retracted based on the position of the active roller 2.

[0062] Specifically:

[0063] The conveyor belt of the present invention mainly has multiple roller groups 3 arranged in a straight line below the two active rollers 2. Each roller group 3 can rotate and work synchronously. There are two rotatable guide rollers 31 on the roller group 3. The two guide rollers 31 are respectively located on both sides of the belt 21, that is, the belt 21 passes between the two guide rollers 31. When the roller group 3 rotates forward, the two guide rollers 31 can wind up the belt 21 to complete storage, and when the roller group 3 rotates reversely, the two guide rollers 31 can release the wound belt 21 to complete release. Therefore, when the active roller 2 is adjusted in position by the telescopic cylinder 11, the roller group 3 rotates to adjust the retraction and extension of the belt 21, so that the belt 21 can adapt to the position adjustment of the active roller 2 and be retracted and extended.

[0064] Compared with the existing telescopic conveyor belt with sleeves, the conveyor belt of the present invention can store a longer belt 21 in a winding manner in a smaller space under the two active rollers 2, thereby improving the adjustable range of the belt 21 to adapt to a larger adjustment of the active roller 2, so that the conveyor belt can achieve a wider range of adjustment in length and height.

[0065] The turntable 32 is unlocked and locked, as Figure 1 、 Figure 2 As shown, a shaft column 33 is provided in the middle of the outer side of each turntable 32. The turntable 32 is rotatably mounted on the frame 1 through the shaft column 33, and the end of the shaft column 33 extends to the outside of the frame 1. The turntable 32 can rotate the two guide rollers 31 to release or retract the belt 21.

[0066] In this embodiment, the locking and unlocking of the rotary disk 32 and the roller set 3 can be achieved by locking and unlocking the shaft column 33, which can be achieved by a shaft locker or other corresponding locking parts.

[0067] The active roller 2 is driven by a motor and a transmission box assembly mounted on a telescopic cylinder 11. Since this is a conventional structural part of the conveyor belt, it is not shown in the figure and will not be described in detail. Of course, the two active rollers 2 can also be configured as one active roller and one driven roller, depending on the load requirements.

[0068] Since the multiple roller groups 3 adopt a synchronous adjustment method to control the effective length of the belt 21, and the adjustment of the roller group 3 is a dynamic adjustment based on the position of the active roller 2 adjusted by the telescopic cylinder 11, the following preferred embodiments are provided.

[0069] like Figure 1 、 Figure 2 As shown, a worm 4 is provided on the frame 1, and a plurality of worm gears 41 are connected to the worm 4. The worm 4 drives the plurality of worm gears 41 to rotate synchronously, and the plurality of worm gears 41 are respectively installed at the rotating shaft ends of the plurality of roller groups 3 to drive the plurality of roller groups 3 to rotate synchronously;

[0070] An axial pressure sensor 42 is provided at the end of the worm 4. The axial pressure sensor 42 is used to detect the axial force exerted by the worm wheel 41 on the worm 4. The tensioning force exerted by the belt 21 on the two guide rollers 31 is converted into the rotational force of the roller set 3 and transmitted to the worm wheel 41.

[0071] The worm 4 is connected to the shaft of the drive motor of the worm 4 through the axial pressure sensor 42 , and the drive motor controls the worm 4 according to the comparison result between the detection value of the axial pressure sensor 42 and the preset threshold value.

[0072] In this embodiment, by setting a worm gear 41 at the axial end of the roller group 3, multiple worm gears 41 cooperate with the worm 4 to achieve synchronous drive, and the worm 4 cooperates with the worm gear 41 to form self-locking, preventing the roller group 3 from reversing after adjustment or after being subjected to rotational force, thereby improving the adjustment accuracy.

[0073] An axial pressure sensor 42 is provided at the connection between the worm 4 and the shaft end of the drive motor, so that after the rotational force of the worm wheel 41 is applied to the worm 41, the worm 4 can exert axial pressure on the axial pressure sensor 42, thereby detecting the stored internal force of the belt 21. By setting the high and low thresholds of the stored internal force, the drive motor is adjusted according to the comparison result between the detection value and the high and low thresholds. Specifically:

[0074] When the telescopic cylinder 11 drives the distance between the two active rollers 2 to increase, the belt 21 becomes tight and generates a rotational force on the two guide rollers 31. At this time, the roller group 3 has a tendency to rotate, causing the worm wheel 41 to apply an axial force to the worm 4. At this time, the axial pressure sensor 42 detects that the pressure increases by more than the maximum threshold, and the driving motor rotates the worm 4 to drive the worm wheel 41 to rotate, releasing the belt 21 wound on the guide rollers 31, thereby reducing the rotational force of the belt 21 acting on the two guide rollers 31, so that the detection value is maintained between the maximum threshold and the minimum threshold.

[0075] Or when the telescopic cylinder 11 drives the distance between the two active rollers 2 to decrease, the belt 21 loosens and reduces the rotational force on the two guide rollers 31. At this time, the rotation tendency of the roller group 3 weakens, so that the axial force exerted by the worm wheel 41 on the worm 4 decreases. At this time, the axial pressure sensor 42 detects that the pressure decreases beyond the minimum threshold, and the driving motor rotates the worm 4 to drive the worm wheel 41 to rotate, winding the belt 21 on the guide roller 31, thereby increasing the rotational force exerted by the belt 21 on the two guide rollers 31, so that the detection value is maintained between the maximum threshold and the minimum threshold.

[0076] It can be seen that the drive motor is adjusted according to the comparison result between the detection value of the axial pressure sensor 42 and the threshold value, which can release or store the belt 21 and ensure that the tension of the belt 21 is maintained within a certain range.

[0077] Based on the above embodiment, the roller group 3 is rotatably mounted on the frame 1 , and the roller group 3 can drive the two guide rollers 31 to rotate synchronously along their axes. Based on this, the following preferred embodiments are provided.

[0078] like Figure 2 As shown, the roller set 3 includes two turntables 32, and the two guide rollers 31 on the roller set 3 are rotatably installed between the two turntables 32, and the two guide rollers 31 are arranged away from the axis of the turntable 32;

[0079] A shaft column 33 is centrally provided on a side of the turntable 32 away from the guide roller 31 . The turntable 32 is rotatably mounted on the frame 1 via the shaft column 33 , and one end of the shaft column 33 passes through the frame 1 and is assembled with the worm gear 41 .

[0080] In this embodiment, each roller set 3 is rotatably mounted on the frame 1 by two turntables 32 through a shaft 33 in the middle thereof, and a worm gear 41 is mounted on the shaft 33 of one of the turntables 32 to drive the turntable 32 to rotate. The two turntables 32 are connected by two guide rollers 31. The rotation of the worm gear 41 can drive the two turntables 32 to rotate synchronously, that is, drive the roller set 3 to rotate.

[0081] During the rotation of the roller assembly 3, the two guide rollers 31 can wind up the belt 21. However, due to the limited diameter of the guide rollers 31, the amount of belt 21 that can be wound up is limited, resulting in a small amount of belt 21 that can be accommodated by each roller assembly 3. Therefore, in order to further increase the amount of belt 21 that can be accommodated, the following preferred embodiments are provided.

[0082] like Figure 3 As shown, two first diameter-expanding rollers 34 are provided on the turntable 32. The two first diameter-expanding rollers 34 are respectively provided on the side of the guide roller 31 in the opposite direction of rotation of the turntable 32. The distance between the first diameter-expanding rollers 34 and the axis of the turntable 32 is greater than or equal to the distance between the axis of the guide roller 31 and the axis of the turntable 32. When the guide roller 31 is rotated by the turntable 32 to rewind the belt 21, the first diameter-expanding rollers 34 expand the belt 21 outward to increase the rotatable angle of the turntable 32.

[0083] Two second expanding rollers 35 are provided on the turntable 32. The two second expanding rollers 35 are respectively provided on one side of the guide roller 31 in the direction of rotation of the turntable 32. The distance between the second expanding rollers 35 and the axis of the turntable 32 is greater than or equal to the distance between the guide roller 31 and the axis of the turntable 32. When the guide roller 31 is rotated by the turntable 32 to rewind the belt 21, the second expanding rollers 35 expand the belt 21 outward for a second time, thereby increasing the rotatable angle of the turntable 32.

[0084] The winding length of the belt 21 is positively correlated with the rotatable angle of the turntable 32 .

[0085] In this embodiment, a first diameter expansion roller 34 is added to the side of the guide roller 31 in the opposite direction of rotation of the turntable 32, so that when the turntable 32 rotates to rewind the belt 21, the belt 21 can cover the first diameter expansion roller 34, thereby extending the rewinding path of the belt 21 and effectively increasing the capacity of the belt 21.

[0086] By adding a second expanding roller 35 on the side of the guide roller 31 facing the rotation direction of the turntable 32, when the turntable 32 rotates to rewind the belt 21, the belt 21 can be wound around the second expanding roller 35 again to form a second layer of winding, further increasing the capacity of the belt 21.

[0087] Based on the above embodiment, when adjusting the height and / or spacing between the two active rollers 2, the telescopic cylinder 11 needs to be extended and / or rotated. Based on this, a preferred embodiment of the telescopic cylinder 11 is provided below.

[0088] like Figure 1 As shown, the telescopic cylinder 11 includes two telescopic cylinders 11, the cylinder ends of the two telescopic cylinders 11 are rotatably mounted on both sides of the frame 1, and the shaft end of the active roller 2 is mounted on the cylinder rod ends of the two telescopic cylinders 11 on the same side so as to be rotated and / or telescopically adjusted in position by the telescopic cylinders 11.

[0089] In this embodiment, the telescopic cylinder 11 is composed of two telescopic cylinders 11, and the cylinder ends of the telescopic cylinders 11 are rotatably mounted on the frame 1. When the two telescopic cylinders 11 rotate and extend, the active roller 2 can be raised and lowered and / or translated, thereby achieving height adjustment and spacing adjustment of the two active rollers 2, that is, adjusting the height and length dimensions of the belt 21.

[0090] Of course, the rotation adjustment of the telescopic cylinder 11 requires a driving source. Based on this, the following preferred embodiments are provided.

[0091] like Figure 1 As shown, a double-headed cylinder 12 is provided on each of the two telescopic cylinders 11 on the same side of the two telescopic cylinders 11. The two cylinder rod ends of the double-headed cylinder 12 are rotatably mounted on the two telescopic cylinders 11 respectively. The double-headed cylinder 12 is used to extend and push the two telescopic cylinders 11 away from each other, or shorten and pull the two telescopic cylinders 11 towards each other, so as to synchronously adjust the angles of the two telescopic cylinders 11.

[0092] The middle portion of the cylinder body of the double-headed cylinder 12 is arranged on the frame 1 to limit the horizontal movement of the cylinder body of the double-headed cylinder 12 .

[0093] In this embodiment, a double-headed cylinder 12 is used to synchronously drive the two telescopic cylinders 11. That is, when the cylinder rod of the double-headed cylinder 12 is extended and retracted, the telescopic cylinders 11 on both sides are pushed and pulled, thereby adjusting the angle of the telescopic cylinder 11, that is, rotating the telescopic cylinder 11 to change the height of the active drum 2.

[0094] The end of the cylinder rod of the double-headed cylinder 12 is rotatably mounted on the telescopic cylinder 11. At this time, the double-headed cylinder 12 is mounted on the frame 1 and is restricted by the frame 1 so that it can only slide up and down. When the telescopic cylinder 11 rotates, the double-headed cylinder 12 can move up and down with the rotation of the telescopic cylinder 11.

[0095] Alternatively, the cylinder rod end of the double-headed cylinder 12 is rotatably installed on the telescopic cylinder 11, and the cylinder rod end of the double-headed cylinder 12 is slidably set on the telescopic cylinder 11. At this time, the double-headed cylinder 12 is fixed on the frame 1 so that it cannot move. When the telescopic cylinder 11 rotates, the cylinder rod end of the double-headed cylinder 12 can rotate and slide on the telescopic cylinder 11.

[0096] Based on the above embodiment, the connection method of the double-headed cylinder 12 and the telescopic cylinder 11 is as follows: Figure 4 As shown, a connecting rod 13 is provided at the end of the cylinder body of the telescopic cylinder 11. The connecting rod 13 is installed at a fixed angle to the telescopic cylinder 11 and extends downward. The two cylinder rod ends of the double-headed cylinder 12 are movably installed on the two connecting rods 13 on the same side.

[0097] In this embodiment, the connecting rod 13 is fixed to the cylinder end of the telescopic cylinder 11, and the cylinder end of the telescopic cylinder 11 is rotatably mounted on the frame 1. When the double-headed cylinder 12 pushes and pulls the connecting rod 13, the connecting rod 13 can rotate the telescopic cylinder 11, thereby reducing the required stroke of the double-headed cylinder 12 and reducing the volume of the double-headed cylinder 12.

[0098] In addition, if Figure 5 As shown, a groove 131 is provided through the connecting rod 13 , and two sliders 132 are symmetrically slidably installed on the inner wall of the groove 131 , and the cylinder rod end of the double-headed cylinder 12 is rotatably installed between the two sliders 132 .

[0099] In this embodiment, by providing a groove 131 on the connecting rod 13, the cylinder rod end of the double-headed cylinder 12 can be slidably installed in the groove 131 through the slider 132, so that the double-headed cylinder 12 can be fixed for use, so that the pressure pipeline of the double-headed cylinder 12 can be stably arranged.

[0100] In the above embodiment, the double-headed cylinder 12 is a conventional coaxial double-headed cylinder 12, which can realize synchronous driving and rotate the telescopic cylinder 11. However, since the conventional double-headed cylinder 12 is usually synchronously driven, it is impossible to independently drive the telescopic cylinder 11 on one side to rotate. In addition, due to the fixed length, the cylinder rod stroke of the double-headed cylinder 12 is short, and it is difficult to realize a larger angle rotation of the telescopic cylinder 11, that is, the adjustment range is small. Based on this, the following preferred embodiments are provided.

[0101] like Figure 5 As shown, the double-headed cylinder 12 includes two cylinder barrels 121, which are fixed to each other. A piston rod 122 is installed in each cylinder barrel 121, and the two piston rods 122 face opposite directions.

[0102] An eccentric plate 123 is provided on the end of the piston rod 122 outside the cylinder barrel 121. An assembly plate 124 is mounted on the eccentric plate 123. The assembly plate 124 is rotatably mounted between the two sliders 132. The two cylinder barrels 121 are symmetrically distributed on the upper and lower sides of the assembly plate 124 so that the assembly plate 124 is located on the symmetrical midline of the two cylinder barrels 121.

[0103] The two piston cylinder rods 122 work independently.

[0104] In this embodiment, the double-headed cylinder 12 uses two cylinder barrels 121 arranged side by side, and their piston cylinder rods 122 face opposite directions, thereby obtaining a larger stroke distance. In addition, the two cylinder barrels 121 can be independently connected to the pressure pipeline to achieve independent drive. In other words, the two telescopic cylinders 11 can rotate at different angles to achieve height adjustment of the active roller 2, thereby achieving climbing or descending adjustment of the belt 21.

[0105] The eccentric plate 123 and the assembly plate 124 are used to connect the piston cylinder rod 122 and the slider 132 .

[0106] Based on the above embodiment, when the distance between the two active rollers 2 is increased, that is, when the conveying section of the belt 21 is lengthened, the middle part of the conveyor belt 21 is more easily compressed and collapsed. Therefore, in order to ensure that the belt 21 has sufficient supporting force after the length is adjusted, the following preferred embodiment is provided.

[0107] like Figure 1 、 Figure 4 As shown, a connecting frame 22 is provided at both ends of each active roller 2. The connecting frame 22 is concave in shape and faces the inner side of the active roller 2. A scissor-type telescopic frame 23 is provided between the two connecting frames 22.

[0108] A plurality of auxiliary rollers 24 are provided on the scissor-type telescopic frame 23 , and the plurality of auxiliary rollers 24 are used to support the belt 21 between the two active rollers 2 ;

[0109] A support rod 231 is provided on each pin shaft of the scissor-type telescopic frame 23, and a roller bracket 232 is provided on each support rod 231. The auxiliary roller 24 is rotatably mounted on the roller bracket 232, and the auxiliary roller 24 abuts against the bottom surface of the belt 21 located between the two active rollers 2.

[0110] In this embodiment, a retractable scissor-type telescopic frame 23 is provided between the two active rollers 2 so that the two active rollers 2 can be extended and retracted in response to changes in the distance between the two active rollers 2. A support rod 231 is provided on each pin of the scissor-type telescopic frame 23, and a roller bracket 232 is provided on the support rod 231. The auxiliary roller 24 can be installed through the support rod 231 and the roller bracket 232, thereby supporting the belt 21.

[0111] And because the auxiliary roller 24 is arranged on the structure composed of the support rod 231 and the roller bracket 232, and the support rod 231 is installed on the middle pin shaft of the scissor-type telescopic frame 23, when the scissor-type telescopic frame 23 is extended or retracted, the auxiliary roller 24 follows the movement, that is, when the scissor-type telescopic frame 23 is stretched, the spacing between the auxiliary rollers 24 increases, and when the scissor-type telescopic frame 23 is compressed, the spacing between the auxiliary rollers 24 decreases, so as to evenly support the belt 21.

[0112] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A roller-rotating retractable conveyor belt, characterized in that: include: Rack (1); Active rollers (2), one active roller (2) is provided at each end of the frame (1), and a belt (21) is provided between the two active rollers (2) to form a conveying surface; A telescopic cylinder (11), one telescopic cylinder (11) is provided at each axial end of the active roller (2), and the other end of the telescopic cylinder (11) is rotatably mounted on the end of the frame (1). The telescopic cylinders (11) at both ends of the frame (1) adjust the relative position between the two active rollers (2) by telescoping and rotating; Guide rollers (31), a plurality of guide rollers (31) are arranged on the frame (1) along the conveying direction, the length direction of which is consistent with the width direction of the belt (21), the return section of the belt (21) sequentially passes through the gap between each two of the guide rollers (31), and the belt (21) abuts against the surface of each guide roller (31) to increase the total length of the belt (21); A turntable (32) is rotatably arranged on the frame (1), and a plurality of the turntables (32) are arranged in the conveying direction of the belt (21), with each two turntables (32) forming a group and being arranged opposite to each other on both sides of the width direction of the belt (21), and each two guide rollers (31) are arranged parallel to each other between each group of turntables (32) to form a roller group (3), and the guide rollers (31) can freely rotate relative to the turntable (32), and the turntable (32) rotates so that the two guide rollers (31) are wound around the belt (21) to increase the total length of the belt (21); The synchronous movement of the active roller (2) and the roller group (3) can adjust the height and conveying path length of the belt (21) between the two active rollers (2); A shaft column (33) is provided at the middle of the outer side of each turntable (32), the turntable (32) is rotatably mounted on the frame (1) via the shaft column (33), and the end of the shaft column (33) extends to the outside of the frame (1), and the turntable (32) is capable of rotating the two guide rollers (31) to release or retract the belt (21); A worm (4) is provided on the frame (1), and a plurality of worm wheels (41) are connected to the worm (4). The worm (4) drives the plurality of worm wheels (41) to rotate synchronously, and the plurality of worm wheels (41) are respectively mounted on the ends of the plurality of shaft columns (33) to drive the plurality of roller groups (3) to rotate synchronously. An axial pressure sensor (42) is provided at the end of the worm (4), and the axial pressure sensor (42) is used to detect the axial force of the worm wheel (41) acting on the worm (4), and the tensioning force of the belt (21) acting on the two guide rollers (31) is converted into a rotational force of the roller group (3) and transmitted to the worm wheel (41); The worm (4) is connected to the shaft of the drive motor of the worm (4) via the axial pressure sensor (42), and the drive motor controls the worm (4) according to a comparison result between the detection value of the axial pressure sensor (42) and a preset threshold value; Two first diameter-expanding rollers (34) are provided on the turntable (32), and the two first diameter-expanding rollers (34) are respectively provided on one side of the guide roller (31) in the opposite direction of rotation toward the turntable (32), and the distance between the first diameter-expanding roller (34) and the axis of the turntable (32) is greater than or equal to the distance between the guide roller (31) and the axis of the turntable (32), so that when the guide roller (31) is rotated by the turntable (32) to rewind the belt (21), the first diameter-expanding roller (34) expands the belt (21) outward to expand the rotatable angle of the turntable (32); Two second diameter-expanding rollers (35) are provided on the turntable (32), and the two second diameter-expanding rollers (35) are respectively provided on one side of the guide roller (31) facing the rotation direction of the turntable (32), and the distance between the second diameter-expanding roller (35) and the axis of the turntable (32) is greater than or equal to the distance between the guide roller (31) and the axis of the turntable (32), so that when the guide roller (31) is rotated by the turntable (32) to rewind the belt (21), the second diameter-expanding roller (35) expands the belt (21) outward for a second time to expand the rotatable angle of the turntable (32); The winding length of the belt (21) is positively correlated with the rotatable angle of the turntable (32).

2. The roller rotating retractable conveyor belt according to claim 1, characterized in that: The cylinder ends of the two telescopic cylinders (11) are rotatably mounted on both sides of the frame (1), and the shaft end of the active roller (2) is mounted on the cylinder rod ends of the two telescopic cylinders (11) on the same side so as to be rotated and / or telescopically adjusted in position by the telescopic cylinders (11).

3. The roller-rotating retractable conveyor belt according to claim 2, characterized in that: Two double-headed cylinders (12) are symmetrically arranged on the frame (1), and the two cylinder rod ends of the double-headed cylinders (12) are respectively rotatably mounted on the two telescopic cylinders (11) at the opposite ends of the same side of the frame (1). The double-headed cylinders (12) are used to extend and push the two telescopic cylinders (11) away from each other, or shorten and pull the two telescopic cylinders (11) toward each other, so as to synchronously adjust the angles of the two telescopic cylinders (11); The middle portion of the cylinder body of the double-headed cylinder (12) is arranged on the frame (1) to limit the horizontal movement of the cylinder body of the double-headed cylinder (12).

4. The roller-rotating retractable conveyor belt according to claim 3, characterized in that: A connecting rod (13) is provided at the cylinder end of the telescopic cylinder (11), the connecting rod (13) is installed at a fixed angle with the telescopic cylinder (11) and extends downward, and the two cylinder rod ends of the double-headed cylinder (12) are movably installed on the two connecting rods (13) on the same side.

5. The roller-rotating retractable conveyor belt according to claim 4, characterized in that: A groove (131) is provided through the connecting rod (13), two sliders (132) are symmetrically and slidably mounted on the inner wall of the groove (131), and the cylinder rod end of the double-headed cylinder (12) is rotatably mounted between the two sliders (132).

6. The roller rotating retractable conveyor belt according to claim 5, characterized in that: The double-headed cylinder (12) comprises two cylinder barrels (121), the two cylinder barrels (121) are fixed to each other, a piston cylinder rod (122) is installed in each cylinder barrel (121), and the two piston cylinder rods (122) face in opposite directions; An eccentric plate (123) is provided on the end of the piston cylinder rod (122) located outside the cylinder barrel (121), and an assembly plate (124) is installed on the eccentric plate (123). The assembly plate (124) is rotatably installed between the two sliders (132), and the two cylinder barrels (121) are symmetrically distributed on the upper and lower sides of the assembly plate (124), so that the assembly plate (124) is located on the symmetrical midline of the two cylinder barrels (121); The two piston cylinder rods (122) operate independently.

7. The roller-rotating retractable conveyor belt according to claim 1, characterized in that: A connecting frame (22) is provided at both ends of each active roller (2), the connecting frame (22) being concave in structure and facing the inner side of the active roller (2), and a scissor-type telescopic frame (23) is provided between the two connecting frames (22); Wherein, a plurality of auxiliary rollers (24) are provided on the scissor-type telescopic frame (23), and the plurality of auxiliary rollers (24) are used to support the belt (21) between the two active rollers (2); A support rod (231) is provided on each pin shaft of the scissor-type telescopic frame (23), a roller bracket (232) is provided on each support rod (231), and the auxiliary roller (24) is rotatably mounted on the roller bracket (232), and the auxiliary roller (24) abuts against the bottom surface of the belt (21) located between the two active rollers (2).

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