Cigarette packet conveying drive belt tensioner

Abstract

The utility model belongs to tobacco equipment technical field discloses a cigarette package conveying drive belt tensioner, this cigarette package conveying drive belt tensioner includes fixed frame and tensioning mechanism, tensioning mechanism includes drive belt and a plurality of roller, a plurality of roller all are located on fixed frame, drive belt is wound in a plurality of roller in proper order, and the roller includes screw rod, two bearings, spacer and roller body, and screw rod rotation setting fixed frame, and bearing and spacer all are fixedly covered in screw rod, along the axial direction of screw rod, and spacer sets up between two bearings, effectively alleviates the oblique pressure that roller suffered, avoids the excessive extrusion wear and tear of roller and bearing, and roller body covers in screw rod, and the inner periphery of roller body and the outer ring of bearing are fixedly connected, and the outer periphery of the roller body of at least two rollers is drum -shaped structure, makes drive belt can realize automatic centering, effectively avoids the drive belt deviation phenomenon that roller caused because of the accumulation of glue, greatly reduces the work load of device maintenance, guarantees the stable conveyance of cigarette package, increases the service life of drive belt.

Description

Technical Field

[0001] This utility model relates to the field of tobacco equipment technology, and in particular to a tensioning device for a conveyor belt for tobacco packages. Background Technology

[0002] In the field of tobacco machinery and equipment, the elevated conveyor system for cigarette packs is designed to facilitate quick belt replacement due to the limited space of its conveying channel. The belt tensioning device is designed to be relatively small, and the belt roller shaft is fixed and supported on one side while the other side is suspended.

[0003] In practical applications, glue buildup on the rollers causes belt misalignment, leading to belt wear and breakage, and unstable cigarette pack conveying. Furthermore, the roller bearings are designed to be installed in the middle of the roller, occupying only about one-third of the roller's width. This causes the stress point on the roller to be biased towards the ends when the cigarette pack conveyor belt misaligns, resulting in oblique stress between the roller's inner cavity and the bearing's outer ring. This mutual compression and wear ultimately leads to roller failure.

[0004] Therefore, there is an urgent need for a tensioning device for the conveyor belt of cigarette packs to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a tensioning device for the conveyor belt of cigarette packs, which effectively reduces the oblique pressure on the rollers, avoids excessive squeezing and wear of the rollers and bearings, and enables the conveyor belt to automatically center, ensuring stable conveying of cigarette packs.

[0006] To address the aforementioned problems in the existing technology, this utility model adopts the following technical solution:

[0007] The cigarette pack conveyor belt tensioning device includes:

[0008] Fixture;

[0009] The tensioning mechanism includes a transmission belt and multiple rollers, all of which are located on the fixed frame. The transmission belt is wound around the multiple rollers in sequence. Each roller includes a screw, two bearings, a spacer, and a roller body. The fixed frame is rotatably mounted on the screw. The bearings and the spacers are fixedly sleeved on the screw. Along the axial direction of the screw, the spacer is disposed between the two bearings. The outer periphery of the roller body of at least two of the rollers has a drum-shaped structure. The roller body is sleeved on the screw, and the inner periphery of the roller body is fixedly connected to the outer ring of the bearing.

[0010] Preferably, the tensioning mechanism further includes a stop member located at the end of the screw away from the fixed frame, and the stop member is fixedly sleeved on the outer periphery of the screw. The stop member is used to prevent the inner ring of the bearing from moving axially.

[0011] Preferably, the cigarette pack conveyor belt tensioning device further includes a shim, and an adjustment gap is formed between the stop and the screw head along the axial direction of the screw, with the shim disposed within the adjustment gap.

[0012] Preferably, the inner circumference of the roller body is provided with a protrusion, the protrusion is located between the two bearings, and along the axial direction of the screw, the two end faces of the protrusion abut against the two bearings respectively.

[0013] Preferably, the protrusion has a ring-shaped structure along the circumferential direction of the roller body.

[0014] Preferably, the cigarette pack conveyor belt tensioning device further includes a snap-fit ​​component, and the inner circumference of the roller body is provided with a snap-fit ​​groove. The snap-fit ​​component is snapped into the snap-fit ​​groove, and the snap-fit ​​component is used to prevent the outer ring of the bearing from moving axially.

[0015] Preferably, the slot and the snap-fit ​​element are in a ring shape along the circumferential direction of the roller body.

[0016] Preferably, there are two of each of the snap-fit ​​components and the snap-fit ​​slots. The two snap-fit ​​components are located on one side of the corresponding two bearings, and the two snap-fit ​​components are arranged in a one-to-one correspondence with the two snap-fit ​​slots.

[0017] Preferably, along the axial direction of the screw, the outer periphery of the roller has a first arc surface, a drum surface, and a second arc surface connected in sequence. The first arc surface and the second arc surface are symmetrical about the drum surface, and the drum surface is in contact with the transmission belt.

[0018] Preferably, along the axial direction of the screw, the sum of the lengths of the two bearings and the length of the spacer accounts for two-thirds of the length of the roller body.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model provides a cigarette pack conveyor belt tensioning device. The tensioning mechanism includes a conveyor belt and multiple rollers, all located on a fixed frame. The conveyor belt is wound sequentially around the rollers. Each roller includes a screw, two bearings, a spacer, and a roller body. The screw is rotatably mounted on the fixed frame. The bearings and spacers are fixedly fitted onto the screw. Along the axial direction of the screw, the spacer is positioned between the two bearings, such that the sum of the lengths of the two bearings and the spacer is two-thirds of the length of the roller body. This effectively reduces the oblique pressure on the rollers and prevents excessive squeezing and wear of the rollers and bearings. The roller body is fitted onto the screw, and the inner circumference of the roller body is fixedly connected to the outer ring of the bearing. The outer circumference of at least two roller bodies has a drum-shaped structure, enabling the conveyor belt to automatically align. This effectively prevents the conveyor belt from running off-center due to glue buildup on the rollers, greatly reduces the workload of device maintenance, ensures stable cigarette pack conveying, and increases the service life of the conveyor belt. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the cigarette pack conveyor belt tensioning device provided in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the roller provided in an embodiment of the present utility model;

[0023] Figure 3 This is a cross-sectional view of the roller provided in an embodiment of the present invention.

[0024] Figure label:

[0025] 1. Fixture;

[0026] 2. Transmission belt;

[0027] 3. Roller; 31. Screw; 32. Bearing; 33. Spacer; 34. Roller body; 341. First arc surface; 342. Drum surface; 343. Second arc surface; 35. Stop; 36. Protrusion; 37. Slot;

[0028] 4. Gaskets;

[0029] 5. Snap-fit ​​connectors. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] like Figures 1-3 As shown, in this embodiment, the cigarette pack conveyor belt tensioning device includes a fixed frame 1 and a tensioning mechanism. The tensioning mechanism includes a conveyor belt 2 and multiple rollers 3, all located on the fixed frame 1. The conveyor belt 2 is sequentially wound around the multiple rollers 3. Each roller 3 includes a screw 31, two bearings 32, a spacer 33, and a roller body 34. The fixed frame 1 is rotatably mounted on the screw 31. The bearings 32 and spacers 33 are fixedly fitted onto the screw 31. Along the axial direction of the screw 31, the spacer 33 is positioned between the two bearings 32. The outer periphery of the roller body 34 of at least two rollers 3 has a drum-shaped structure. The roller body 34 is fitted onto the screw 31, and the inner periphery of the roller body 34 is fixedly connected to the outer ring of the bearing 32.

[0035] The rollers 3 include tension rollers and fixed rollers. The transmission belt 2 is wound around multiple fixed rollers 3 and multiple tension rollers 3. The fixed rollers 3 play a role in transmission, while the tension rollers 3 not only play a role in transmission but also play a role in tensioning the transmission belt 2.

[0036] The bearing 32 is designed to be longer, with a single bearing 32 measuring 14mm in length. The screw 31 is rotatably connected to the fixed frame 1. Along its own axis, the screw 31 sequentially houses the bearing 32, the spacer 33, and the bearing 32, effectively separating the two bearings 32 by the spacer 33. This ensures that the sum of the lengths of the two bearings 32 and the spacer 33 accounts for two-thirds of the length of the roller body 34, thus reducing the oblique pressure on the roller 3 and preventing excessive wear and tear on the roller 3 and bearing 32. Along the circumference of the roller body 34, the inner circumference of the roller body 34 is fixedly connected to the outer ring of the bearing 32 and spaced apart from the spacer 33. A transmission belt 2 is wound around the roller body 34. The outer surface of the roller body 34 has a drum-shaped structure, enabling the transmission belt 2 to automatically align. This effectively prevents the transmission belt 2 from running off-center due to glue buildup on the roller 3, significantly reducing maintenance workload, ensuring stable cigarette pack delivery, and increasing the service life of the transmission belt 2.

[0037] Furthermore, referring to Figures 1-3 The tensioning mechanism also includes a stop 35, which is located at the end of the screw 31 away from the fixed frame 1 and is fixedly sleeved on the outer periphery of the screw 31. The stop 35 is used to prevent the inner ring of the bearing 32 from moving axially.

[0038] The stop 35 is set as a retaining ring. Along the axial direction of the screw 31, the stop 35 and the spacer 33 are respectively provided on both sides of one of the bearings 32. The stop 35 and the spacer 33 abut against the two end faces of the inner ring of the bearing 32, which plays a limiting role and can prevent the bearing 32 from moving axially relative to the screw 31.

[0039] Furthermore, referring to Figures 1-3 The cigarette pack conveyor belt tensioning device also includes a shim 4. Along the axial direction of the screw 31, there is an adjustment gap between the stop 35 and the screw head of the screw 31, and the shim 4 is set in the adjustment gap.

[0040] The number of shims 4 is set to be multiple. The size of the adjustment gap is affected by the length of the screw 31, bearing 32 and spacer 33. A certain number of shims 4 are set in the adjustment gap to ensure that the screw head of the screw 31, several shims 4, bearing 32, spacer 33 and bearing 33 abut against each other in sequence along the axial direction of the screw 31, thereby ensuring that the above parts can not move axially relative to the screw 31, and the structure has good stability.

[0041] Furthermore, referring to Figures 1-3 The inner circumference of the roller body 34 is provided with a protrusion 36, which is located between two bearings 32. Along the axial direction of the screw 31, the two end faces of the protrusion 36 abut against the two bearings 32 respectively.

[0042] Along the circumferential direction of the roller body 34, the protrusion 36 has a ring-shaped structure, and the position of the protrusion 36 corresponds to the position of the spacer 33. Along the axial direction of the screw 31, the outer rings of the two bearings 32 are separated by the protrusion 36. Thus, the two bearings 32 are separated by the spacer 33 and the protrusion 36, so that the sum of the length of the two bearings 32 and the length of the spacer 33 accounts for two-thirds of the length of the roller body 34. This effectively reduces the oblique pressure on the roller 3 and avoids excessive extrusion and wear between the roller 3 and the bearings 32.

[0043] Furthermore, referring to Figures 1-3 The cigarette pack conveyor belt tensioning device also includes a snap-fit ​​component 5. The inner circumference of the roller body 34 is also provided with a snap-fit ​​groove 37. The snap-fit ​​component 5 is snapped into the snap-fit ​​groove 37. The snap-fit ​​component 5 is used to prevent the outer ring of the bearing 32 from moving axially.

[0044] Along the circumferential direction of the roller body 34, the slot 37 and the locking element 5 form a ring structure. There are two locking elements 5 and two slots 37, with each locking element 5 located on one side of a corresponding bearing 32, and the two locking elements 5 and the two slots 37 are arranged in a one-to-one correspondence. Along the axial direction of the screw 31, both sides of the bearing 32 abut against the protrusion 36 and the locking element 5, respectively. The protrusion 36 and the locking element provide bidirectional limiting for the bearing 32, further ensuring that the two bearings 32 do not move axially, and the limiting effect is good.

[0045] Furthermore, referring to Figures 1-3 Along the axial direction of the screw 31, the outer periphery of the roller body 34 has a first arc surface 341, a drum surface 342, and a second arc surface 343 connected in sequence. The first arc surface 341 and the second arc surface 343 are symmetrical about the drum surface 342. The drum surface 342 is in contact with the transmission belt 2. The outer surface of the roller body 34 has a drum-shaped structure, which enables the transmission belt 2 to achieve automatic alignment, effectively preventing the transmission belt 2 from running off-center due to glue buildup on the roller 3, greatly reducing the workload of device maintenance, ensuring stable delivery of cigarette packs, and increasing the service life of the transmission belt 2.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tensioning device for a conveyor belt for tobacco packages, characterized in that, include: Fixture (1); The tensioning mechanism includes a transmission belt (2) and multiple rollers (3). The multiple rollers (3) are all located on the fixed frame (1). The transmission belt (2) is wound around the multiple rollers (3) in sequence. Each roller (3) includes a screw (31), two bearings (32), a spacer (33), and a roller body (34). The screw (31) is rotatably mounted on the fixed frame (1). The bearings (32) and the spacer (33) are both fixedly mounted on the screw (31). Along the axial direction of the screw (31), the spacer (33) is located between the two bearings (32). The outer periphery of the roller body (34) of at least two rollers (3) has a drum-shaped structure. The roller body (34) is mounted on the screw (31), and the inner periphery of the roller body (34) is fixedly connected to the outer ring of the bearing (32).

2. The cigarette pack conveyor belt tensioning device according to claim 1, characterized in that, The tensioning mechanism also includes a stop (35), which is located at the end of the screw (31) away from the fixed frame (1) and is fixedly sleeved on the outer periphery of the screw (31). The stop (35) is used to prevent the inner ring of the bearing (32) from axially moving.

3. The cigarette pack conveyor belt tensioning device according to claim 2, characterized in that, The cigarette pack conveyor belt tensioning device also includes a shim (4). Along the axial direction of the screw (31), there is an adjustment gap between the stop (35) and the screw head of the screw (31), and the shim (4) is disposed within the adjustment gap.

4. The cigarette pack conveyor belt tensioning device according to claim 1, characterized in that, The inner circumference of the roller body (34) is provided with a protrusion (36), which is located between the two bearings (32). Along the axial direction of the screw (31), the two end faces of the protrusion (36) abut against the two bearings (32) respectively.

5. The cigarette pack conveyor belt tensioning device according to claim 4, characterized in that, Along the circumferential direction of the roller body (34), the protrusion (36) has an annular structure.

6. The cigarette pack conveyor belt tensioning device according to claim 1, characterized in that, The cigarette pack conveyor belt tensioning device also includes a snap-fit ​​component (5), and the inner circumference of the roller body (34) is also provided with a snap-fit ​​groove (37). The snap-fit ​​component (5) is snapped into the snap-fit ​​groove (37), and the snap-fit ​​component (5) is used to prevent the outer ring of the bearing (32) from moving axially.

7. The cigarette pack conveyor belt tensioning device according to claim 6, characterized in that, Along the circumferential direction of the roller body (34), the slot (37) and the snap-fit ​​member (5) are in a ring structure.

8. The cigarette pack conveyor belt tensioning device according to claim 6, characterized in that, There are two of each of the snap-fit ​​pieces (5) and the snap-fit ​​slots (37). The two snap-fit ​​pieces (5) are located on one side of the corresponding two bearings (32), and the two snap-fit ​​pieces (5) and the two snap-fit ​​slots (37) are arranged in a one-to-one correspondence.

9. The cigarette pack conveyor belt tensioning device according to claim 1, characterized in that, Along the axial direction of the screw (31), the outer periphery of the roller (34) has a first arc surface (341), a drum surface (342) and a second arc surface (343) connected in sequence. The first arc surface (341) and the second arc surface (343) are symmetrical about the drum surface (342) from left to right. The drum surface (342) is in contact with the transmission belt (2).

10. The cigarette pack conveyor belt tensioning device according to claim 1, characterized in that, Along the axial direction of the screw (31), the sum of the lengths of the two bearings (32) and the length of the spacer (33) accounts for two-thirds of the length of the roller (34).

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