Tension-adjustable belt conveyor
By introducing an adjustable screw and chute structure into the belt conveyor, the problem of belt aging and elongation leading to slackness is solved, and automatic adjustment of belt tension is achieved, ensuring the accuracy of conveying speed and the continuity of production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG RENHETANG PHARM CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-21
Smart Images
Figure CN224529738U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pharmaceutical packaging technology, and in particular to a belt conveyor device with adjustable tension. Background Technology
[0002] Medicine box plastic film heat shrink machine is a specialized automated equipment in the pharmaceutical packaging field. It mainly uses the principle of heat shrink to tightly wrap the plastic film on the surface of the medicine box, forming a sealed, moisture-proof, dustproof and neat packaging effect. Some plastic films also have certain anti-counterfeiting functions.
[0003] The heat shrink machine for medicine boxes includes a belt conveyor system for transporting medicine boxes between different workstations. In existing belt conveyor systems, the driven roller shaft is fixed in position. As the belt ages and stretches during use, it becomes loose, causing slippage at the contact points with the drive and driven rollers, affecting the accuracy of the belt conveyor speed. Utility Model Content
[0004] The purpose of this invention is to provide an adjustable belt conveyor device to solve the problems existing in the above-mentioned related technologies, adjust the belt tension, and accurately control the belt conveying speed.
[0005] To achieve the above objectives, this utility model provides the following solution:
[0006] This utility model discloses a belt conveyor device with adjustable tension, comprising:
[0007] A frame includes two plates facing each other. Each plate has a mounting through hole and a mounting groove, which pass through the plate along its thickness direction. One end of the mounting groove has an adjustment through hole perpendicular to the thickness direction of the plate, which is parallel to the mounting groove and extends to the surface of the plate.
[0008] The driven roller shaft has its end slidably mounted in the mounting groove; the end of the driven roller shaft is provided with an adjusting screw hole perpendicular to its own axis, and the adjusting screw hole is directly opposite the adjusting through hole;
[0009] A screw, which passes through the adjusting through hole and is threadedly connected to the adjusting screw hole;
[0010] A driven roller is sleeved on the outside of the driven roller shaft and rotatably connected to the driven roller shaft, and the driven roller is located between the two plates;
[0011] The active roller, the end of which is rotatably mounted in the mounting through hole;
[0012] A belt, which is tensioned by the driven roller and the driving roller.
[0013] Preferably, the mounting through hole is located on the extension line of the mounting groove.
[0014] Preferably, the driven roller shaft and the driven roller are rotatably connected by a bearing, the inner ring of the bearing engaging with the driven roller shaft, and the outer ring of the bearing engaging with the driven roller.
[0015] Preferably, the drive roller and the mounting through hole are rotatably connected by a second bearing, the inner ring of the second bearing mates with the drive roller, and the outer ring of the second bearing mates with the mounting through hole.
[0016] Preferably, both bearing one and bearing two are deep groove ball bearings.
[0017] Preferably, the plate has a first limiting blocking surface and a second limiting blocking surface, and a limiting shoulder is fixed on the screw; the limiting shoulder is located between the first limiting blocking surface and the second limiting blocking surface to limit the axial displacement of the screw.
[0018] Preferably, a handwheel is fixed to one end of the screw that extends out of the plate.
[0019] Preferably, the screw is connected to the motor via a transmission.
[0020] Preferably, the two screws threaded at both ends of the driven roller shaft are connected by a synchronous chain drive to rotate synchronously.
[0021] Preferably, the drive roller is connected to the motor for transmission.
[0022] This utility model achieves the following technical advantages compared to related technologies:
[0023] When the screw is rotated, as long as the axial position of the screw remains unchanged, the driven roller shaft can be driven to slide within the mounting groove, adjusting the distance between the driven roller and the driving roller. As the belt ages and stretches over time, rotating the screw increases the distance between the driven roller and the driving roller, thereby improving belt tension.
[0024] Because the driven roller shaft and the driven roller are rotatably connected, only the driven roller rotates with the belt while the driven roller shaft does not rotate. The screw can always maintain a threaded connection with the driven roller shaft. Therefore, the belt tension can be adjusted at any time without stopping the machine, which is convenient to operate and does not affect the production progress.
[0025] In a preferred embodiment of this invention, the frame has a first limiting blocking surface and a second limiting blocking surface, and a limiting shoulder is fixed on the screw. The limiting shoulder is located between the first and second limiting blocking surfaces to limit the axial displacement of the screw. The first limiting blocking surface is located on the side of the limiting shoulder closer to the driven roller shaft, and the second limiting blocking surface is located on the side of the limiting shoulder away from the driven roller shaft. When the screw rotates in the direction of screwing into the adjusting screw hole, the first limiting blocking surface prevents the screw from moving towards the driven roller shaft. At this time, the axial force provided by the threaded engagement pulls the driven roller axially towards the screw. When the screw rotates in the direction of screwing out of the adjusting screw hole, the second limiting blocking surface prevents the screw from moving towards the side away from the driven roller shaft. At this time, the axial force provided by the threaded engagement pushes the driven roller axially towards the side away from the screw. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of an adjustable belt conveyor device in some examples of this utility model.
[0028] In the diagram: 1-Frame; 2-Driven roller shaft; 3-Screw; 4-Driven roller; 5-Driven roller; 6-Belt; 7-Mounting through hole; 8-Mounting groove; 9-Bearing 1; 10-Bearing 2; 11-Limiting stop surface 1; 12-Limiting stop surface 2; 13-Limiting shoulder; 14-Stop block; 15-Sprocket; 16-Handwheel; 17-Plate body; 18-Adjusting through hole; 19-Adjusting screw hole. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] The purpose of this invention is to provide an adjustable belt conveyor device to solve the problems existing in the above-mentioned related technologies, adjust the belt tension, and accurately control the belt conveying speed.
[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] Reference Figure 1 This embodiment provides a belt conveyor with adjustable tension, including a frame 1, a driven roller shaft 2, a screw 3, a driven roller 4, a drive roller 5, and a belt 6.
[0033] The frame 1 includes two facing plates 17, which are typically vertically arranged. Each plate 17 has a mounting through hole 7 and a mounting groove 8, which pass through the plate 17 along its thickness direction. The mounting groove 8 is linear, preferably horizontal. One end of the mounting groove 8 has an adjustment through hole 18 perpendicular to the thickness direction of the plate 17, parallel to the mounting groove 8 and extending to the surface of the plate 17. The end of the driven roller shaft 2 is slidably mounted within the mounting groove 8. The end of the driven roller shaft 2 has an adjustment screw hole 19 perpendicular to its own axis, opposite the adjustment through hole 18. A screw 3 passes through the adjustment through hole 18 and is threadedly connected to the adjustment screw hole 19. A driven roller 4 is sleeved on the outside of the driven roller shaft 2 and rotatably connected to it, located between the two plates 17. The end of the driving roller 5 is rotatably mounted within the mounting through hole 7. The belt 6 is tensioned by the driven roller 4 and the driving roller 5.
[0034] The working principle of the adjustable belt conveyor in this embodiment is as follows:
[0035] When rotating screw 3, as long as the axial position of screw 3 remains unchanged, the driven roller shaft 2 can be driven to slide within the mounting groove 8, adjusting the distance between the driven roller 4 and the driving roller 5. As the belt 6 ages and elongates with prolonged use, rotating screw 3 increases the distance between the driven roller 4 and the driving roller 5, thereby improving the tension of belt 6.
[0036] Since the driven roller shaft 2 and the driven roller 4 are rotatably connected, only the driven roller 4 rotates with the belt 6 while the driven roller shaft 2 does not rotate. The screw 3 can always maintain a threaded connection with the driven roller shaft 2. Therefore, the tension of the belt 6 can be adjusted at any time without stopping the machine, which is convenient to operate and does not affect the production progress.
[0037] In some examples, the mounting through hole 7 is located on the extension line of the mounting groove 8. In actual use, the mounting through hole 7 can also be slightly offset from the extension line of the mounting groove 8.
[0038] In some examples, the driven roller shaft 2 and the driven roller 4 are rotatably connected by a bearing 9, the inner ring of the bearing 9 engaging with the driven roller shaft 2, and the outer ring of the bearing 9 engaging with the driven roller 4.
[0039] There are multiple bearings 9, and the multiple bearings 9 are symmetrically arranged about the center cross-section of the driven roller 4.
[0040] In some examples, the drive roller 5 is rotatably connected to the mounting through hole 7 via a bearing 10, the inner ring of the bearing 10 engaging with the drive roller 5, and the outer ring of the bearing 10 engaging with the mounting through hole 7.
[0041] There are multiple bearings 10, and the multiple bearings 10 are symmetrically arranged about the center cross-section of the drive roller 5.
[0042] In some examples, bearing 9 and bearing 10 are both deep groove ball bearings.
[0043] Bearing 9 and bearing 10 bear almost no axial force, so there is no need to use tapered roller bearings.
[0044] In some examples, the frame 1 has a first limiting stop surface 11 and a second limiting stop surface 12, and a limiting shoulder 13 is fixed on the screw 3. The limiting shoulder 13 is located between the first limiting stop surface 11 and the second limiting stop surface 12 to limit the axial displacement of the screw 3.
[0045] Limiting and blocking surface 11 is located on the side of the limiting shoulder 13 close to the driven roller shaft 2, and limiting and blocking surface 12 is located on the side of the limiting shoulder 13 away from the driven roller shaft 2.
[0046] When the screw 3 rotates in the direction of screwing into the adjusting screw hole 19, the screw 3 is prevented from moving towards the driven roller shaft 2 due to the obstruction of the limiting blocking surface 11. At this time, the axial force provided by the threaded engagement pulls the driven roller shaft 2 towards the screw 3.
[0047] When the screw 3 rotates in the direction of the adjusting screw hole 19, the screw 3 is prevented from moving away from the driven roller shaft 2 due to the obstruction of the limiting blocking surface 12. At this time, the axial force provided by the threaded engagement pushes the driven roller shaft 2 away from the screw 3.
[0048] However, the actual implementation is not limited to this. For example, only the first limiting blocking surface 11 can be provided, without the second limiting blocking surface 12. In this case, the adjusting through hole 18 is located at the end of the mounting groove 8 opposite to the mounting through hole 7. Simply rotate the screw 3 in the direction of screwing into the adjusting screw hole 19. Due to the obstruction of the first limiting blocking surface 11, the screw 3 is prevented from moving towards the driven roller shaft 2. At this time, the axial force provided by the threaded engagement pulls the driven roller shaft 2 towards the screw 3, increasing the distance between the driven roller shaft 2 and the driving roller 5, thus tensioning the belt 6.
[0049] In some examples, the first limiting blocking surface 11 is the side of the plate 17 with the adjustment through hole 18, the second limiting blocking surface 12 is the side of the stop block 14, the stop block 14 is fixed relative to the plate 17, and the screw 3 (its smooth rod section) passes through the stop block 14.
[0050] The screw 3 can be rotated manually or electrically.
[0051] In some examples, a handwheel 16 is fixed to one end of the screw 3 extending out of the plate 17. The operator can grasp and rotate the handwheel 16 to drive the screw 3 to rotate.
[0052] In some examples, screw 3 is driven by motor 1. The output shaft of motor 1 can be directly fixed to screw 3 via a coupling, or a transmission mechanism such as a gearbox can be installed between motor 1 and screw 3.
[0053] To improve the tensioning efficiency of belt 6, the two ends of driven roller 2 can be moved synchronously.
[0054] In some examples, the two screws 3 threaded at both ends of the driven roller shaft 2 are connected by a synchronous chain drive to rotate synchronously.
[0055] That is, both screws 3 are keyed to sprockets 15, and the synchronizing chain meshes with both sprockets 15 respectively. Since the two screws 3 are identical and the two sprockets 15 are identical, one screw 3 only needs to be driven manually or electrically to rotate, and the other screw 3 will maintain synchronous rotation.
[0056] In some examples, the drive roller 5 is connected to the second motor via a drive mechanism. The output shaft of the second motor can be directly fixed to the drive roller 5 via a coupling, or a gearbox or other transmission mechanism can be installed between the second motor and the drive roller 5.
[0057] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A belt conveyor device with adjustable tension, characterized in that, include: A frame includes two plates facing each other. Each plate has a mounting through hole and a mounting groove, which pass through the plate along its thickness direction. One end of the mounting groove has an adjustment through hole perpendicular to the thickness direction of the plate, which is parallel to the mounting groove and extends to the surface of the plate. The driven roller shaft has its end slidably mounted in the mounting groove; the end of the driven roller shaft is provided with an adjusting screw hole perpendicular to its own axis, and the adjusting screw hole is directly opposite the adjusting through hole; A screw, which passes through the adjusting through hole and is threadedly connected to the adjusting screw hole; A driven roller is sleeved on the outside of the driven roller shaft and rotatably connected to the driven roller shaft, and the driven roller is located between the two plates; The active roller, the end of which is rotatably mounted in the mounting through hole; A belt, which is tensioned by the driven roller and the driving roller.
2. The adjustable belt conveyor according to claim 1, characterized in that: The mounting through hole is located on the extension line of the mounting groove.
3. The adjustable belt conveyor according to claim 1, characterized in that: The driven roller shaft and the driven roller are rotatably connected by a bearing. The inner ring of the bearing engages with the driven roller shaft, and the outer ring of the bearing engages with the driven roller.
4. The adjustable belt conveyor according to claim 3, characterized in that: The drive roller and the mounting through hole are rotatably connected by a second bearing. The inner ring of the second bearing mates with the drive roller, and the outer ring of the second bearing mates with the mounting through hole.
5. The adjustable belt conveyor according to claim 4, characterized in that: Both bearing one and bearing two are deep groove ball bearings.
6. The adjustable belt conveyor according to claim 1, characterized in that: The frame has a first limiting blocking surface and a second limiting blocking surface, and a limiting shoulder is fixed on the screw; the limiting shoulder is located between the first limiting blocking surface and the second limiting blocking surface to limit the axial displacement of the screw.
7. The adjustable belt conveyor according to claim 1, characterized in that: A handwheel is fixed to one end of the screw that extends out of the plate.
8. The adjustable belt conveyor according to claim 1, characterized in that: The screw is connected to the motor via a transmission.
9. The adjustable belt conveyor according to claim 1, characterized in that: The two screws threaded to both ends of the driven roller shaft are connected by a synchronous chain drive to rotate synchronously.
10. The adjustable belt conveyor according to claim 1, characterized in that: The drive roller is connected to the motor for transmission.