Belt tensioning adjusting device

Abstract

The utility model provides a belt tensioning adjusting device which comprises a power shaft, a power wheel, a mounting shaft sleeve, two adjusting pieces, a mounting shaft and a tensioning wheel. The mounting shaft sleeve is movably connected with the power shaft so that the power shaft can rotate relative to the mounting shaft sleeve, the adjusting part comprises a matching part and an extension arm, a sleeving hole allowing the mounting shaft sleeve to penetrate through is formed in the middle of the matching part, and the extension arm is connected with the side edge of the matching part and extends in the radial direction relative to the mounting shaft sleeve. The mounting shaft is parallel to the power shaft and is fixedly connected with the extension arm; and the adjusting piece is provided with a locking mechanism capable of relatively fixing the adjusting piece and the mounting shaft sleeve. The power wheel and the tensioning wheel are arranged in a concentrated mode, so that the belt conveying mechanism is more compact in structure, the tensioning adjusting effect is more visual, the occupied space is small, an extra electric device does not need to be added, and the belt conveying mechanism can be flexibly arranged at different positions of the outer side of a conveying belt and can adapt to different space conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco packaging machinery, in particular to a belt tensioning and adjusting device. Background Art

[0002] In tobacco packaging machinery, cigarette packs are mainly transported by belt conveyor mechanisms, which include a horizontally arranged bottom conveyor belt and two vertically arranged side conveyor belts located on both sides of the bottom conveyor belt. A conveying channel is formed between the two side conveyor belts. When the cigarette packs pass through the conveying channel, the side conveyor belts clamp the cigarette packs laterally and generate friction to assist in the transportation of the cigarette packs. The magnitude of the friction is affected by the tightness of the side conveyor belt. Therefore, a tensioning device is generally required to ensure that the side conveyor belts are in the best conveying state.

[0003] The most widely used tensioning device at present is the spiral tensioner, which is usually set in groups of two at both ends of the conveyor belt. The tightness of the belt is adjusted by changing the position of the end roller of the conveyor belt by a screw. The device has a simple structure, but when used, it is necessary to reserve adjustment space at both ends of the conveyor belt. The two ends of the belt conveyor mechanism of the tobacco packaging machinery need to be connected with the upstream and downstream channels, which on the one hand leads to limited adjustment space, and on the other hand leads to the docking accuracy between the channels before adjustment will be affected. The patent document with the publication number CN208377697U discloses a pneumatic tensioning device for a Zb48 cigarette pack conveyor belt, which includes a tensioning mechanism located on the side plate of the Zb48 packaging machine, the tensioning mechanism includes a cylinder with a cylinder seat and a cylinder rod, a swing rod, a pressure regulating valve and a pressure gauge; the cylinder is arranged on the side plate of the Zb48 packaging machine, the output end of the cylinder rod extends to the left and is hinged with one end of the swing rod, and the other end of the swing rod is provided with a belt-pressing wheel; a positioning hole is provided on the swing rod, and the swing rod is fixed to the side plate of the Zb48 packaging machine through a first positioning shaft passing through the positioning hole; the pressure regulating valve and the pressure gauge are electrically connected to the cylinder in sequence through a line. The tensioning mechanism applies pressure from the outside of the conveyor belt through the belt-pressing wheel controlled by the cylinder and the swing rod, so that the conveyor belt is in a tensioned state, which solves some problems existing when the spiral tensioner is applied to tobacco packaging machinery, but the device occupies a large space, and the cylinder needs to be electrically controlled, which reduces the compactness of the device and increases the space requirement of the equipment. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a belt tensioning adjustment device, which integrates the power wheel and the tensioning mechanism into an integrated design, improves the compactness of the device, reduces space requirements, and when the tensioning mechanism adjusts the belt tightness, it will not affect the docking of the upstream and downstream channels of the conveying mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A belt tensioning and adjusting device comprises a power shaft, a power wheel fixedly connected to the power shaft, a mounting sleeve sleeved on the outer circumference of the power shaft, two adjusting members movably connected to the mounting sleeve and rotatable relative to each other, a mounting shaft fixedly connected to the adjusting member, and a tensioning wheel connected to the mounting shaft and rotatable around the mounting shaft; the mounting sleeve is movably connected to the power shaft so that the power shaft can rotate relative to the mounting sleeve, the adjusting member comprises a matching portion and an extension arm, the middle portion of the matching portion forms a socket hole for the mounting sleeve to pass through, the extension arm is connected to the side of the matching portion and extends radially relative to the mounting sleeve, the mounting shaft is arranged parallel to the power shaft and fixedly connected to the extension arm; the adjusting member is provided with a locking mechanism that can fix the adjusting member and the mounting sleeve relatively.

[0007] When the utility model is used, it is installed on the outer side of the conveying side belt of the conveying mechanism, the power shaft sleeve is fixedly connected to the frame of the conveying mechanism, and the power shaft is connected to the motor, and then the conveying side belt is inserted between the first tensioning wheel and the power wheel and is wound around the outer periphery of the power wheel, and then it is inserted between the second tensioning wheel and the power wheel, that is, the connection between the tensioning adjustment device and the conveying mechanism is completed. After the connection is completed, the locking structure is released, and the two adjustment parts can rotate relative to each other and change the angle between each other. In the process of changing the angle, on the one hand, the covering area of ​​the conveying belt and the power wheel can be changed, and on the other hand, the tension of the conveying belt can be changed to achieve the purpose of tension adjustment. The utility model is installed on the outer side of the conveying side belt, which is convenient for the staff to perform the adjustment operation. Before and after the adjustment, it is only necessary to change the tightness of the locking mechanism. The process is simple and does not rely on complex electric equipment. In addition, the two tensioning wheels and one power wheel in the utility model are integrated, so that the adjustment mechanism occupies less space, and the space required for the activity process of the adjustment part is also small, which is not easy to affect the layout of other mechanisms.

[0008] Furthermore, the mounting sleeve includes a mounting cylinder and a stopper block, a cylinder hole for the power shaft to pass through is formed in the middle of the mounting cylinder, a cylinder surface that can cooperate with the sleeve hole is formed on the outside of the mounting cylinder, and the stopper block radially protrudes relative to the cylinder surface and forms a stopper support surface perpendicular to the cylinder surface. The stopper block is usually arranged at the lower end of the mounting cylinder to support the adjustment block and limit the adjustment block from escaping from the lower end, and two adjustment blocks are stacked above the stopper block.

[0009] Furthermore, the locking mechanism includes a locking ring and a locking screw, the locking ring is fixed to the inner side of the sleeve hole and can rotate relative to the mounting sleeve, and the side of the adjusting member is provided with a through adjustment hole with a thread, and the locking screw can apply pressure to the locking ring through the adjustment hole to make the locking ring elastically abut against the mounting cylinder. When the locking screw does not apply pressure to the locking ring, the locking ring is in a first shape and is loosened from the outer wall of the mounting cylinder, so that the adjusting member can rotate relative to the mounting cylinder and adjust the tension of the conveyor belt, and when the locking screw applies pressure to the locking ring, the locking ring changes to a second shape and abuts against the outer wall of the mounting cylinder, so that the adjusting member is fixed to the mounting cylinder.

[0010] Furthermore, the locking ring has a fracture, and the two ends corresponding to the fracture are respectively connected with a first end and a second end extending outward, the first end and the second end are arranged in parallel and a spacing area is formed therebetween, the inner wall of the sleeve hole is provided with a radially recessed clearance groove, the first end and the second end extend into the clearance groove, and the adjustment hole is connected to the clearance groove.

[0011] Furthermore, the clearance groove has a first abutting wall and a second abutting wall which are parallel to each other, and both the first abutting wall and the second abutting wall abut against the locking ring.

[0012] Furthermore, the first end head extends beyond the first end head and the exceeding portion forms an extension portion, the extension portion has an abutment protrusion protruding toward the second abutment wall, and two sides of the first end head abut against the first abutment wall and the second abutment wall respectively.

[0013] Furthermore, a second spacing area is formed between the second end head and the second abutting wall.

[0014] Furthermore, the locking ring has a positioning protruding tooth radially protruding outward, and the inner wall of the sleeve hole is provided with a positioning groove matching with the positioning protruding tooth.

[0015] Furthermore, the fracture and the positioning protruding teeth are arranged on opposite sides of the locking ring.

[0016] Furthermore, an end block protruding inward is provided at one end of the inner wall of the sleeve hole, and the end block can abut against one end of the locking ring.

[0017] The application of the utility model can achieve the following beneficial effects:

[0018] 1. The utility model centrally arranges the power wheel and the tension wheel, so that the structure of the belt conveyor mechanism is more compact, the tension adjustment effect is more intuitive, and the space occupancy is small. There is no need to add additional electric devices. It can be flexibly arranged at different positions outside the conveyor belt and can adapt to different space conditions.

[0019] 2. The utility model is provided with two adjusting parts which can rotate relative to each other, and the adjusting parts are fixed by a locking mechanism. When in use, it is only necessary to loosen the locking mechanism to rotate the adjusting parts relative to the mounting sleeve, and the tightness of the conveying belt can be changed by changing the angle between the two adjusting parts. Then, the locking mechanism can be fixed to complete the tightness adjustment. The utility model has a simple structure and is easy to use. In addition, the setting position of the utility model relative to the belt conveying mechanism is also convenient for the staff to operate.

[0020] 3. The utility model can adjust the wrap angle between the conveyor belt and the power wheel, thereby changing the matching stability of the conveyor belt and the power wheel, reducing the probability of slipping and improving the conveying stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the belt tensioning and adjusting device in the embodiment;

[0022] Figure 2 for Figure 1 The schematic diagram of the working state of the belt tensioning and adjusting device shown;

[0023] Figure 3 for Figure 1 Schematic diagram of the split structure of the middle adjustment member and the mounting sleeve;

[0024] Figure 4 A schematic diagram of the structure of a locking mechanism in one embodiment;

[0025] Figure 5 for Figure 4 A schematic diagram of a top view structure;

[0026] Figure 6 for Figure 5 Enlarged view of area a in the middle;

[0027] Figure 7 is a structural schematic diagram of a locking mechanism in another embodiment;

[0028] Figure 8 for Figure 7 Enlarged view of area b;

[0029] In the figure, 1-power shaft, 11-lower shaft body, 111-power wheel support surface, 12-upper shaft body, 13-fixing bolt, 2-power wheel, 3-installing sleeve, 31-installing cylinder, 311-cylinder surface, 32-limiting block, 321-limiting support surface, 4-adjusting member, 41-matching part, 411-adjusting hole, 42-extension arm, 43-sleeve hole, 431-displacement groove, 4311-first abutment Wall, 4312-second abutment wall, 432-positioning groove, 433-end block, 44-mounting hole, 5-mounting shaft, 6-tensioning wheel, 7-locking ring, 71-break, 711-first end, 7111-extension, 7112-abutment convex portion, 712-second end, 713-spacer, 714-second spacer, 72-positioning convex tooth, 8-locking screw, L-conveyor belt. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0031] Reference Figures 1 to 3 The utility model provides a belt tensioning adjustment device, which is used to adjust the tightness of a vertically arranged conveying belt so that the conveying belt is in an optimal conveying state. For example, the device can be used in cigarette pack conveying equipment. Some conveying mechanisms of the cigarette pack conveying equipment include two vertical side belts arranged in parallel, a logistics channel is formed between the side belts, a bottom belt is arranged at the bottom of the logistics channel, and the cigarette packs placed in the logistics channel are driven forward by the two side belts and one bottom belt. The belt tensioning and adjusting device includes a power wheel 2 and two tensioning wheels 6. The two tensioning wheels are respectively arranged on both sides of the power wheel. The power wheel is fixedly installed on the upper end of the power shaft 1. The power shaft can rotate the power wheel under the drive of the motor. A mounting sleeve 3 is arranged on the outer side of the power shaft. The mounting sleeve is fixed on the frame when in use. Each tensioning wheel is connected to an adjusting member 4 through a mounting shaft 5. The mounting shaft is arranged parallel to the power shaft. The mounting shaft and the tensioning wheel are movably connected through a bearing shaft so that the tensioning wheel can rotate relative to the mounting shaft. The adjusting member is sleeved on the outer side of the mounting sleeve and can rotate around the mounting sleeve, so that the spatial positions of the two tensioning wheels can be adjusted around the power wheel. After adjusting to the appropriate position, the adjusting member and the mounting sleeve can be relatively fixed by a locking mechanism. Reference Figure 3In the working state, the conveyor belt L passes through the gap between the first tensioning wheel and the power wheel along a first direction and wraps around the power wheel, and then passes through the gap between the second tensioning wheel and the power wheel along a second direction. By changing the spatial positions of the two tensioning wheels, the wrapping length of the conveyor belt on the power wheel can be controlled, thereby changing the tension of the conveyor belt and making the conveyor belt in the best working state. In addition, by changing the wrapping length, the driving stability between the conveyor belt and the power wheel can be changed to avoid slipping.

[0032] The specific structure of each component of the belt tensioning and adjusting device is further described below:

[0033] The power shaft 1 is divided into a lower shaft body 11 with a relatively large outer diameter and an upper shaft body 12 with a relatively small outer diameter. The upper end of the upper shaft body forms a power wheel support surface 111, and the upper shaft body is vertically connected to the middle of the power wheel support surface. The size of the axial hole in the middle of the power wheel corresponds to the outer diameter of the upper shaft body 12, so that when the power wheel is sleeved on the outer periphery of the upper shaft body, the lower side can abut against the power wheel support surface, thereby limiting the installation position of the power wheel on the power shaft. A detachable fixing bolt 13 is connected to the upper end of the upper shaft body, and the fixing bolt applies downward pressure to the power wheel to relatively fix the power wheel and the power shaft.

[0034] The mounting sleeve 3 includes a mounting cylinder 31 with a cylindrical structure, a cylinder hole for the power shaft to pass through is formed in the middle of the mounting cylinder, and a cylinder surface 311 for the adjusting member 4 to be installed in cooperation is formed on the outer side of the mounting cylinder. More specifically, the mounting cylinder is arranged corresponding to the lower shaft body 11 of the power shaft, and the upper end of the lower shaft body 11 extends upward relative to the mounting cylinder, so that when the lower side of the power wheel abuts against the power wheel support surface, the power wheel will not contact the mounting cylinder; the lower end of the mounting cylinder is connected to a limiting block 32, which extends radially outward relative to the cylinder surface, and the limiting block forms a limiting support surface 321 vertically connected to the cylinder surface, and when the adjusting member is sleeved on the outer side of the mounting cylinder, the lower side of the adjusting member will overlap the limiting support surface.

[0035] The adjusting member 4 includes a matching portion 41 which can be matched with the mounting sleeve 3 and an extension arm 42 which is integrally connected with the matching portion 41 and extends radially outward. A sleeve hole 43 corresponding to the mounting sleeve is provided in the middle of the matching portion, and a mounting hole 44 is provided on the extension arm. The inner diameter of the sleeve hole is not less than the outer diameter of the cylinder surface, so that the matching portion can rotate relative to the mounting sleeve. The mounting hole can be fixedly connected with the mounting shaft 5 and make the mounting shaft parallel to the power shaft; a through adjustment hole 411 with threads is provided on the side of the matching portion 41.

[0036] The locking mechanism at least includes a locking screw 8 that can be threadedly connected to the adjusting hole. The locking screw can apply pressure to the mounting sleeve by screwing in, so that the mating part and the mounting sleeve are locked due to the pressure. Specifically, the pressure can be applied in the following ways:

[0037] In the first embodiment, the adjustment hole is arranged toward the axis of the sleeve hole, and the locking screw can directly abut against the mounting sleeve during the screwing process, and relatively fix itself with the mounting sleeve, thereby relatively fixing the adjustment member connected to the locking screw with the mounting sleeve;

[0038] In the second embodiment, a locking ring made of elastic material is installed on the inner wall of the adjustment hole. When there is no pressure from the locking screw, the inner wall of the locking ring is movably connected to the cylinder surface of the mounting sleeve, so that the adjustment part can rotate relative to the mounting sleeve. When the locking screw is screwed in, the locking screw applies pressure to the locking ring, causing the locking ring to elastically deform and then abut against the cylinder surface, so that the adjustment part and the mounting sleeve are relatively fixed. Through the setting of the locking ring, the force between the locking screw and the mounting sleeve can be more uniform, and it is not easy to cause local structural deformation and damage due to direct abutment.

[0039] Reference Figures 4 to 6The utility model also provides another implementation method of the locking mechanism. In this embodiment, the locking ring 7 has a break 71, and the opposite ends of the break are respectively connected to a first end 711 and a second end 712 extending in the outward direction. The first end is arranged in parallel with the second end, and a spacing area 713 for deformation is left between the first end and the second end. A radially recessed paving groove 431 is arranged on the inner wall of the sleeve hole. The setting position of the paving groove corresponds to the first end and the second end and can accommodate the first end at the same time. The first abutment wall 4311 and the second abutment wall 4312 are parallel to each other, and the first abutment wall is relatively close to the first end and abuts against the first end, and the second abutment wall is close to the second end and abuts against the second end. The abutment structure formed by the give way groove and the first end and the second end can fix the locking ring in the circumferential direction to prevent the locking ring from sliding relative to the inner wall of the sleeve hole; the adjustment hole 411 extends vertically toward the first abutment wall and the second abutment wall and is connected to the give way groove. The locking screw 8 can apply pressure to the first end or the second end through the adjustment hole, and cause the first end or the second end to deform in the direction of the spacing area. During the deformation process, the inner diameter of the annular body area of ​​the locking ring may be reduced, thereby causing the locking ring to apply pressure to the cylinder surface and lock it; compared with the solution of directly applying pressure to the annular body area of ​​the locking ring through the locking screw, this embodiment can further distribute the pressure, avoid structural deformation, and the locking ring is easier to rebound, which is convenient for later adjustment of the adjustment member; in a further embodiment, A positioning convex tooth 72 protruding outward is formed on the other side of the locking ring opposite to the fracture, and a positioning groove 432 corresponding to the positioning convex tooth is provided on the inner wall of the sleeve hole, and the positioning convex tooth can be snapped into the positioning groove so that the locking ring can be installed in the sleeve hole with the correct orientation; in a further embodiment, an end block 433 protruding inward is provided at one end of the inner wall of the sleeve hole, and the end block can abut against the end of the locking ring to prevent the locking ring from slipping out of the end of the sleeve hole, thereby improving the fixing effect of the locking ring.

[0040] Reference Figure 7-8The second end portion 714 is formed between the second end portion 714 and the second abutment wall 4412, that is, the first end portion 711 is connected to the first abutment wall 4412 at the same time and the locking ring is fixed relative to the sleeve hole, and the second end portion is in a free state relative to the clearance groove, and contacts with the second end portion when the locking screw is screwed in. This embodiment allows the second end portion to be deformed in the direction of the spacing area 713 and the second spacing area 714, thereby increasing the deformation range of the locking ring, which not only ensures that the locking ring can be locked with the mounting sleeve under the action of the locking screw, but also ensures that the locking ring can be flexibly rotated between the mounting sleeve when the locking screw is not acted upon.

[0041] Similarly, a second locking mechanism may be provided at the mounting hole to facilitate adjustment and fixation of the mounting shaft. The structure of the second locking mechanism may refer to the locking mechanism at the sleeve hole in the above embodiment.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A belt tensioning and adjusting device, characterized in that: The invention comprises a power shaft (1), a power wheel (2) fixedly connected to the power shaft, a mounting sleeve (3) sleeved on the outer circumference of the power shaft, two adjusting members (4) movably connected to the mounting sleeve and capable of relatively rotating, a mounting shaft (5) fixedly connected to the adjusting member, and a tensioning wheel (6) connected to the mounting shaft and capable of rotating around the mounting shaft; the mounting sleeve movably cooperates with the power shaft so that the power shaft can rotate relative to the mounting sleeve; the adjusting member comprises a matching portion (41) and an extension arm (42); a sleeve hole (43) is formed in the middle of the matching portion for the mounting sleeve to pass through; the extension arm is connected to the side of the matching portion and extends radially relative to the mounting sleeve; the mounting shaft is arranged parallel to the power shaft and fixedly connected to the extension arm; the adjusting member is provided with a locking mechanism capable of fixing the adjusting member and the mounting sleeve relatively.

2. A belt tensioning and adjusting device according to claim 1, characterized in that: The mounting sleeve comprises a mounting cylinder (31) and a stop block (32); a cylinder hole for the power shaft to pass through is formed in the middle of the mounting cylinder; a cylinder surface (311) that can cooperate with the sleeve hole is formed on the outside of the mounting cylinder; and the stop block protrudes radially relative to the cylinder surface and forms a stop support surface (321) perpendicular to the cylinder surface.

3. A belt tensioning and adjusting device according to claim 1, characterized in that: The locking mechanism comprises a locking ring (7) and a locking screw (8); the locking ring is fixed to the inner side of the sleeve hole and can rotate relative to the mounting sleeve; a through adjusting hole (411) with a thread is provided on the side of the adjusting member; the locking screw can apply pressure to the locking ring through the adjusting hole so that the locking ring elastically contacts the mounting cylinder.

4. A belt tensioning and adjusting device according to claim 3, characterized in that: The locking ring has a fracture (71), and the two ends corresponding to the fracture are respectively connected to a first end (711) and a second end (712) extending outward, the first end and the second end are arranged in parallel and a spacing area (713) is formed therebetween, the inner wall of the sleeve hole is provided with a radially recessed clearance groove (431), the first end and the second end extend into the clearance groove, and the adjustment hole is communicated with the clearance groove.

5. A belt tensioning and adjusting device according to claim 4, characterized in that: The clearance groove comprises a first abutting wall (4311) and a second abutting wall (4312) which are parallel to each other, and the first abutting wall and the second abutting wall are both in abutment with the locking ring.

6. A belt tensioning and adjusting device according to claim 5, characterized in that: The first end head extends beyond the first end head and the exceeding portion forms an extension portion (7111), and the extension portion has an abutment protrusion (7112) protruding toward the second abutment wall, and the two sides of the first end head abut against the first abutment wall and the second abutment wall respectively.

7. A belt tensioning and adjusting device according to claim 6, characterized in that: A second spacing area (714) is formed between the second end head and the second abutting wall.

8. The belt tensioning and adjusting device according to claim 4, characterized in that: The locking ring has a positioning protruding tooth (72) protruding radially outward, and the inner wall of the sleeve hole is provided with a positioning groove (432) matching the positioning protruding tooth.

9. A belt tensioning and adjusting device according to claim 8, characterized in that: The fracture and the positioning protruding teeth are arranged on two opposite sides of the locking ring.

10. The belt tensioning and adjusting device according to claim 3, characterized in that: One end of the inner wall of the sleeve hole is provided with an end clamping block (433) protruding inwards, and the end clamping block can abut against one end of the locking ring.

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