Telescopic belt conveyor

Abstract

The utility model discloses a telescopic belt conveyor which comprises a conveying rack, a conveying belt, a plurality of upper carrier rollers, a plurality of lower carrier rollers, a steering roller and a driving roller, the conveying rack is composed of a fixed portion rack and a movable portion rack which are connected in an inserted mode, and the driving roller is rotationally supported at the extending end of the movable portion rack. The steering roller is rotationally supported at the outer end of the fixed part rack, a lower steering roller and a middle roller are further rotationally supported on the fixed part rack, a driven roller is further movably and rotationally supported on the fixed part rack, and the two ends of the conveying belt are tightly arranged on the driving roller and the driven roller in a sleeving mode respectively; the movable part rack is connected with the driven roller through a reverse synchronous telescopic mechanism; part of the upper carrier rollers and part of the lower carrier rollers are movably installed on the movable part rack at intervals in the length direction of the movable part rack. By the adoption of the telescopic belt conveyor, the length of the conveyor can be adjusted, and the conveying distance of materials can be changed.

Description

Technical Field

[0001] The utility model relates to a conveying device, in particular to an improvement of a belt conveyor. Background Art

[0002] A belt conveyor conveys materials through a conveyor belt tightly sleeved on a driving roller and a turning roller at both ends. The driving roller and the turning roller are rotationally supported on a conveying rack. The conveyor belt is driven to operate by the driving roller. The conveying rack of a conventional belt conveyor is a frame-type steel structure body, which can be fixedly installed or movable. It can be moved to the loading and unloading place of goods for conveying operations as required. The length of its conveying rack and the distance between the driving roller and the turning roller are both fixed and unchangeable. Therefore, the distance between the material input place and the material output place is also unchangeable. This is beneficial for a belt conveyor fixed at a certain position, which can ensure the structural stability and long service life. However, for a movable belt conveyor, the feeding place and the discharging place of the materials to be conveyed each time are not the same, and the required conveying distance is also uncertain. In order to meet this use requirement, belt conveyors of different lengths often need to be equipped, which will undoubtedly increase the equipment configuration cost. Content of the Utility Model

[0003] Aiming at the above-mentioned deficiencies existing in the prior art, the technical problem to be solved by the utility model is to provide a telescopic belt conveyor, which can adjust the length of the conveyor and change the conveying distance of materials.

[0004] In order to solve the above technical problem, a telescopic belt conveyor of the utility model comprises a conveying rack, a conveyor belt, a plurality of upper supporting rollers and lower supporting rollers, a turning roller and a driving roller drivingly connected with a conveyor belt driving device. The conveying rack is composed of a fixed part rack and a movable part rack. The movable part rack is inserted and connected with the fixed part rack along the length direction. The driving roller is rotationally supported at the outer extending end of the movable part rack. The turning roller is rotationally supported at the outer end of the fixed part rack. A lower turning roller and an intermediate roller are also rotationally supported on the fixed part rack below the turning roller. A driven roller is rotationally supported on the fixed part rack movably along the length direction of the conveying rack. Both ends of the conveyor belt are respectively tightly sleeved on the driving roller and the driven roller. The conveyor belt on the upper side of the driving roller bypasses the turning roller and the intermediate roller, and the conveyor belt on the lower side of the driving roller bypasses the lower turning roller. The movable part rack and the driven roller are connected by a reverse synchronous telescopic mechanism. Some of the upper supporting rollers and the lower supporting rollers are installed at intervals on the fixed part rack, and some of the upper supporting rollers and the lower supporting rollers are installed at intervals on the movable part rack movably along the length direction of the movable part rack.

[0005] In the above structure, since the conveying rack is composed of a fixed part rack and a movable part rack, and the movable part rack is inserted and connected to the fixed part rack along the length direction, the total length of the entire conveying rack can be changed by changing the length of the movable part rack inserted into the fixed part rack, so that the length of the conveyor can be adjusted to meet the material conveying requirements for different conveying distance requirements.

[0006] Also, since the driving roller is rotatably supported at the outer extending end of the movable part rack, the turning roller is rotatably supported at the outer end of the fixed part rack, a lower turning roller and an intermediate roller are also rotatably supported on the fixed part rack below the turning roller, and a driven roller is rotatably supported on the fixed part rack movably along the length direction of the conveying rack. The two ends of the conveyor belt are respectively tightly sleeved on the driving roller and the driven roller. The conveyor belt on the upper side of the driving roller bypasses the turning roller and the intermediate roller, and the conveyor belt on the lower side of the driving roller bypasses the lower turning roller. Then, the conveyor belt changes from the conventional direct socket connection between the driving roller with a fixed position and the turning roller to bypassing the lower turning roller, the turning roller and the intermediate roller from the driving roller and then socketing on the driven roller. When the length of the movable part rack inserted into the fixed part rack changes, the distance between the driving roller and the turning roller changes accordingly. At this time, by changing the position of the driven roller on the fixed part rack along the length direction of the conveying rack, the problem that the length of the conveyor belt caused by the change in the distance between the driving roller and the turning roller does not match the distance between the driving roller and the turning roller can be solved, so that the conveyor belt between the driving roller and the driven roller can maintain the same tension regardless of how the distance between the driving roller and the turning roller changes, and thus the conveyor belt can still operate normally after the length of the conveying rack changes.

[0007] Also, since the movable part rack and the driven roller are connected by a reverse synchronous telescopic mechanism, the position of the movable part rack can be associated with the position of the driven roller through the reverse synchronous telescopic mechanism. No matter how much the distance between the driving roller and the turning roller changes after the position of the movable part rack changes, the distance between the driven roller and the turning roller synchronously changes in the opposite direction by the same distance, ensuring that the conveyor belt between the driving roller and the driven roller can maintain the same tension regardless of how the distance between the driving roller and the turning roller changes.

[0008] Furthermore, since some of the upper idlers and lower idlers are installed at intervals on the fixed part rack, and some of the upper idlers and lower idlers are installed at intervals on the movable part rack movably along the length direction of the movable part rack, then as the length of the movable part rack inserted into the fixed part rack changes, the upper idlers and lower idlers on the movable part rack can move and change their positions, without hindering the change in the position of the movable part rack, ensuring the smooth progress of the change in the length of the conveying rack.

[0009] In a preferred embodiment of the present utility model, the fixed part of the frame is fixedly supported on the foundation through feet, and the outer extending end of the movable part of the frame is movably supported on the foundation through feet and casters. The other end of the movable part of the frame is inserted into the frame guide groove on the fixed part of the frame. By adopting this embodiment, it is convenient for the installation, connection and length adjustment of the conveying frame.

[0010] In another preferred embodiment of the present utility model, the driven roller is rotatably supported on the driven roller core shaft, and the driven roller core shaft is movably supported on the fixed part of the frame through a guide rail pair. By adopting this embodiment, changing the position of the driven roller core shaft on the fixed part of the frame can conveniently realize the movable and rotatable support of the driven roller on the fixed part of the frame.

[0011] In still another preferred embodiment of the present utility model, the conveyor belt between the lower turning roller and the driven roller is parallel to the conveyor belt between the middle roller and the driven roller and parallel to the conveyor belt between the turning roller and the driving roller. By adopting this embodiment, when the driven roller changes its position along the length direction of the conveying frame, the length change of the conveyor belt between the lower turning roller and the driven roller is equal to the length change of the conveyor belt between the middle roller and the driven roller and equal to the displacement distance of the driven roller. In this way, it is convenient to ensure that the conveyor belt between the driving roller and the driven roller can maintain the same tension regardless of how the distance between the driving roller and the turning roller changes.

[0012] In a further preferred embodiment of the present utility model, the reverse synchronous telescoping mechanism is a chain transmission pair installed on the fixed part of the frame. The two sprockets of the chain transmission pair are rotatably supported at both ends of the fixed part of the frame at intervals along the length direction of the fixed part of the frame. The movable part of the frame is fixedly connected to one side of the chain of the chain transmission pair, and the driven roller is fixedly connected to the other side of the chain through the driven roller core shaft. By adopting this embodiment, the running directions of the upper and lower sides of the chain between the two sprockets in the chain transmission pair are opposite and the running distances are equal, which can well meet the working requirements of the reverse synchronous telescoping mechanism, so that when the length of the movable part of the frame inserted into the fixed part of the frame changes, the driven roller moves in the reverse direction by the same length, ensuring that the tension degree of the conveyor belt between the driving roller and the driven roller remains unchanged.

[0013] In another further preferred embodiment of the present utility model, chain transmission pairs are respectively arranged on the left and right sides of the fixed part of the frame. One side of the chains in the chain transmission pairs on both sides is respectively fixedly connected to the left and right sides of the movable part of the frame, and the other side of the chains in the chain transmission pairs on both sides is respectively fixedly connected to the driven roller core shafts at both ends of the driven roller. By adopting this embodiment, both the left and right sides of the movable part of the frame and both ends of the driven roller can be simultaneously restricted by the reverse synchronous telescoping mechanism to ensure the stability during the length adjustment of the conveying frame.

[0014] A further preferred embodiment of the present utility model is that a chain position locking mechanism is provided between the fixed part frame and the chain transmission pair. With this embodiment, the chain position locking mechanism can ensure that the position between the chain and the fixed part frame will no longer change, so that the positions of the movable part frame and the driven roller relative to the fixed part frame will no longer change after adjustment and locking. This ensures the stable operation of the conveyor after the length of the conveyor frame is changed.

[0015] A further preferred embodiment of the present utility model is that one upper idler and one lower idler adjacent to the outer extension end of the movable part frame are fixedly installed on the movable part frame, and the remaining upper idlers and lower idlers on the movable part frame are movably connected to the movable part frame. With this embodiment, except for one upper idler and one lower idler adjacent to the outer extension end of the movable part frame, the relative positions of the remaining upper idlers and lower idlers on the movable part frame can be changed, maximizing the adjustment range of the movable part frame.

[0016] Another further preferred embodiment of the present utility model is that the two ends of the upper idler and the lower idler movably connected to the movable part frame are respectively connected to the movable part frame through sliding grooves. With this embodiment, the upper idler and the lower idler movably connected to the movable part frame can be movably connected to the movable part frame by using the guiding function of the sliding grooves, with a simple structure and a reliable displacement process.

[0017] A further further preferred embodiment of the present utility model is that the adjacent two upper idlers installed on the movable part frame are connected by a flexible cable, and the adjacent two lower idlers installed on the movable part frame are connected by a flexible cable. With this embodiment, the flexible cable can limit the maximum distance between adjacent two upper idlers or lower idlers, ensuring the reliable support of the upper idlers and lower idlers movably supported on the movable part frame for the conveyor belt. Description of the Drawings

[0018] The following further details the retractable belt conveyor of the present utility model in conjunction with the drawings and specific embodiments.

[0019] Figure 1 is a schematic structural diagram of a specific embodiment of the retractable belt conveyor of the present utility model;

[0020] Figure 2 is Figure 1 a cross-sectional view of the A-A part in the shown structure;

[0021] Figure 3 is Figure 1 a cross-sectional view of the B-B part in the shown structure.

[0022] In the figure: 1 - steering roller, 2 - conveyor belt, 3 - lower steering roller, 4 - intermediate roller, 5 - driven roller, 6 - reverse synchronous telescoping mechanism, 7 - lower idler, 8 - upper idler, 9 - fixed part of the frame, 10 - support leg, 11 - flexible cable, 12 - movable part of the frame, 13 - caster, 14 - drive roller, 15 - chute, 16 - frame guide groove, 17 - driven roller spindle, 18 - guide rail pair. Detailed implementation

[0023] In Figure 1 In the retractable belt conveyor shown, the conveyor frame is a supporting component for the installation, tensioning, and operation of the conveyor belt 2. The conveyor frame consists of two parts: the fixed part of the frame 9 and the movable part of the frame 12. The fixed part of the frame 9 is fixedly supported on the foundation through the support legs 10, and the outer extending end of the movable part of the frame 12 is movably supported on the foundation through the support legs 10 and the casters 13. Refer to Figure 3 , the other end of the movable part of the frame 12 is inserted into the frame guide groove 16 on the fixed part of the frame 9, that is, the movable part of the frame 12 is inserted and connected to the fixed part of the frame 9 along the length direction.

[0024] On the conveyor frame composed of the fixed part of the frame 9 and the movable part of the frame 12, the drive roller 14 is rotatably supported at the outer extending end of the movable part of the frame 12 through the roller support, or can also be rotatably supported at the outer extending end of the movable part of the frame 12 through the roller support and the tensioning device of the conveyor belt 2. The drive roller 14 is in transmission connection with the conveyor belt drive device (also fixedly connected to the outer extending end of the movable part of the frame 12, not shown in the figure). The steering roller 1 is rotatably supported at the outer end of the fixed part of the frame 9. The lower steering roller 3 and the intermediate roller 4 are also rotatably supported on the fixed part of the frame 9 below the steering roller 1. The driven roller 5 is rotatably supported on the fixed part of the frame 9 along the length direction of the conveyor frame in a movable manner. The driven roller 5 is rotatably supported on the driven roller spindle 17, and the driven roller spindle 17 is movably supported on the fixed part of the frame 9 through the guide rail pair 18. The guide rail pair 18 can adopt a general linear guide rail pair, or can also be like Figure 3 shown, an ordinary guide groove and slider are used. The two ends of the conveyor belt 2 are respectively tightly sleeved on the drive roller 14 and the driven roller 1. The conveyor belt 2 on the upper side of the drive roller 14 bypasses the steering roller 1 and the intermediate roller 4, and the conveyor belt 2 on the lower side of the drive roller 14 bypasses the lower steering roller 3. And through the correct setting of the positions of the lower turning roller 3 and the intermediate roller 4, the conveyor belt 2 between the lower steering roller 3 and the driven roller 5 is preferably parallel to the conveyor belt 2 between the intermediate roller 4 and the driven roller 5 and parallel to the conveyor belt 2 between the steering roller 1 and the drive roller 14.

[0025] The movable part of the frame 12 inserted into the frame guide groove 16 on the fixed part of the frame 9 and the driven roller 5 movably supported on the fixed part of the frame 9 through the driven roller spindle 17 and the guide rail pair 18 are connected by the reverse synchronous telescoping mechanism 6, such asFigure 1 As shown, the reverse synchronous telescopic mechanism 6 is a chain drive pair installed on the fixed part frame 9. The two sprockets of this chain drive pair are rotatably supported at both ends of the fixed part frame 9 at intervals along the length direction of the fixed part frame 9. Refer to Figure 3 , one side of the chain of the chain drive pair is fixedly connected to the movable part frame 12 through a fixed clamp. The driven roller 5 is fixedly connected to the other side of the chain through the driven roller core shaft 17 and the corresponding fixed clamp. And chain drive pairs are respectively arranged on the left and right sides of the fixed part frame 9. One side of the chain in the chain drive pairs on both sides is respectively fixedly connected to the left and right sides of the movable part frame 12, and the other side of the chain in the chain drive pairs on both sides is respectively fixedly connected to the driven roller core shafts 17 at both ends of the driven roller 5. A chain position locking mechanism is arranged between the fixed part frame 9 and the chain drive pair. The chain position locking mechanism is not shown in the figure and any common position locking device can be adopted. For example, a ratchet installed on the two sprockets and a pawl correspondingly installed on the fixed part frame 9 are adopted. When the pawl is opened, the chain drive pair can operate. When the pawl is engaged, the chain drive pair cannot operate. The chain position locking mechanism is used to lock the relative position between the chain and the fixed part frame 9 after the positions of the movable part frame 12 and the driven roller 5 are adjusted, so that the chain drive pair cannot operate any more, and it is difficult for the movable part frame 12 and the driven roller 5 to change their positions. In order to ensure the stability of the position of the movable part frame 12, a device such as a set screw can also be arranged between the fixed part frame 9 and the movable part frame 12 to keep the relative position between the two unchanged. The reverse synchronous telescopic mechanism 6 can also not be a chain drive pair installed on the fixed part frame 9, but can be a toothed belt drive pair installed on the fixed part frame 9; of course, the reverse synchronous telescopic mechanism 6 can also be a driving device composed of two sets of servo motors or stepper motors. The two sets of servo motors or stepper motors respectively drive the movable part frame 12 and the driven roller 5 to move in the reverse direction by the same distance.

[0026] A number of upper supporting rollers 8 and lower supporting rollers 7 for supporting the conveyor belt are installed on the corresponding fixed part frame 9 and movable part frame 12. Refer to Figure 2 and Figure 3, wherein the upper idler rollers 8 and the lower idler rollers 7 that are spaced and installed on the fixed part frame 9 are fixedly connected to the fixed part frame, an upper idler roller 8 and a lower idler roller 7 adjacent to the outer extension end of the movable part frame 12 are fixedly installed on the movable part frame 12, and the remaining upper idler rollers 8 and lower idler rollers 7 installed on the movable part frame 12 are spaced and installed on the movable part frame 12 movably along the length direction of the movable part frame 12. The two ends of the upper idler rollers 8 and the lower idler rollers 7 that are movably connected to the movable part frame 12 are respectively connected to the movable part frame 12 through sliding grooves 15; for the upper idler rollers 8 and the lower idler rollers 7 installed on the movable part frame 12, adjacent upper idler rollers 8 are connected by a flexible cable 11, and adjacent lower idler rollers 7 are also connected by a flexible cable 11. When the movable part frame 12 adjusts its position towards the fixed part frame 9 to reduce the length of the conveyor frame, the distance between the upper idler rollers 8 and the lower idler rollers 7 will be reduced. When the movable part frame 12 adjusts its position towards the outer extension end to increase the length of the conveyor frame, the upper idler roller 8 and the lower idler roller 7 fixedly installed at the outer extension end of the movable part frame 12 will pull the remaining upper idler rollers 8 and lower idler rollers 7 one by one through the flexible cable 11, so that the distance between each upper idler roller 8 and each lower idler roller 7 is kept within the length range of the flexible cable 11, ensuring the supporting effect on the conveyor belt 2.

[0027] Only some preferred embodiments of the present invention are listed above, but the present invention is not limited thereto, and many improvements and transformations can also be made. As long as the improvements and transformations are made based on the basic principle of the present invention, they shall be regarded as falling within the protection scope of the present invention.

Claims

1. A retractable belt conveyor, comprising a conveyor frame, a conveyor belt (2), a plurality of upper idlers (8) and lower idlers (7), a turning drum (1) and a driving drum (14) drivingly connected to a conveyor belt driving device, characterized in that: The conveying frame is composed of two parts, namely a fixed part frame (9) and a movable part frame (12). The movable part frame (12) is inserted and connected to the fixed part frame (9) along the length direction. The driving roller (14) is rotatably supported at the outer extending end of the movable part frame (12), and the turning roller (1) is rotatably supported at the outer end of the fixed part frame (9). A lower turning roller (3) and an intermediate roller (4) are also rotatably supported on the fixed part frame (9) below the turning roller (1). A driven roller (5) is rotatably supported on the fixed part frame (9) movably along the length direction of the conveying frame. The two ends of the conveyor belt (2) are respectively tightly sleeved on the driving roller (14) and the driven roller (1). The conveyor belt (2) on the upper side of the driving roller (14) bypasses the turning roller (1) and the intermediate roller (4), and the conveyor belt (2) on the lower side of the driving roller (14) bypasses the lower turning roller (3); the movable part frame (12) and the driven roller (5) are connected by a reverse synchronous telescopic mechanism (6); some of the upper idlers (8) and lower idlers (7) are installed at intervals on the fixed part frame (9), and some of the upper idlers (8) and lower idlers (7) are installed at intervals on the movable part frame (12) movably along the length direction of the movable part frame (12).

2. The retractable belt conveyor according to claim 1, wherein: The fixed part frame (9) is fixedly supported on the foundation through feet (10). The outer extending end of the movable part frame (12) is movably supported on the foundation through feet (10) and casters (13). The other end of the movable part frame (12) is inserted into the frame guide groove (16) on the fixed part frame (9).

3. The retractable belt conveyor according to claim 1, characterized in that: The driven roller (5) is rotatably supported on a driven roller core shaft (17), and the driven roller core shaft (17) is movably supported on the fixed part frame (9) through a guide rail pair (18).

4. The retractable belt conveyor according to claim 1 or 3, characterized in that: The conveyor belt (2) between the lower turning roller (3) and the driven roller (5) is parallel to the conveyor belt (2) between the intermediate roller (4) and the driven roller (5) and parallel to the conveyor belt (2) between the turning roller (1) and the driving roller (14).

5. The retractable belt conveyor according to claim 1, characterized in that: The reverse synchronous telescopic mechanism (6) is a chain transmission pair installed on the fixed part frame (9). The two sprockets of the chain transmission pair are rotatably supported at both ends of the fixed part frame (9) at intervals along the length direction of the fixed part frame (9). The movable part frame (12) is fixedly connected to one side of the chain in the chain transmission pair, and the driven roller (5) is fixedly connected to the other side of the chain through a driven roller core shaft (17).

6. The retractable belt conveyor according to claim 5, wherein: Chain transmission pairs are respectively arranged on the left and right sides of the fixed part frame (9). One side of the chains in the chain transmission pairs on both sides is fixedly connected to the left and right sides of the movable part frame (12) respectively, and the other side of the chains in the chain transmission pairs on both sides is fixedly connected to the driven roller core shafts (17) at both ends of the driven roller (5) respectively.

7. The retractable belt conveyor according to claim 5, wherein: A chain position locking mechanism is arranged between the fixed part frame (9) and the chain transmission pair.

8. The retractable belt conveyor according to claim 1, wherein: One of the upper idler rollers (8) and one of the lower idler rollers (7) adjacent to the outer extension end of the movable frame (12) are fixedly installed on the movable frame (12), and the remaining upper idler rollers (8) and lower idler rollers (7) on the movable frame (12) are movably connected to the movable frame (12).

9. The retractable belt conveyor according to claim 8, characterized in that: Both ends of the upper idler roller (8) and the lower idler roller (7) movably connected to the movable frame (12) are respectively connected to the movable frame (12) through sliding grooves (15).

10. The retractable belt conveyor according to claim 1, 8 or 9, characterized in that: Adjacent upper idler rollers (8) installed on the movable frame (12) are connected by a flexible cable (11), and adjacent lower idler rollers (7) installed on the movable frame (12) are connected by a flexible cable (11).

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