A tensioning device for a feed belt

Abstract

This invention provides a belt tensioning device. The belt feed drive wheel is connected to a first connecting seat, and the tensioning drive wheel is connected to a second connecting seat. The first and second connecting seats are fitted together. The second connecting seat has an actuating part, and the first connecting seat has a mating part. Through the engagement of the actuating and mating parts, when the belt is tensioned, the first connecting seat is forced to move the belt feed drive wheel away from the belt feed drive wheel, thus actively separating the belt feed drive wheel and the belt feed drive wheel. This invention can actively separate the belt feed drive wheel and the belt feed drive wheel when the belt is tensioned, preventing the belt feed drive wheel from approaching the belt feed drive wheel during operation, thus avoiding misfitting and unnecessary wear on the belt feed drive wheel and the strapping.

Description

Technical Field

[0001] This utility model relates to the field of packaging machines, and in particular to a feeding and unloading tensioning device. Background Technology

[0002] A strapping machine is a device that uses strapping tape to bundle items. The entire strapping process involves steps such as tape feeding, tape retraction, tape tensioning, and heat sealing. Tape feeding and retraction are achieved through the same pair of drive and driven wheels, while tape tensioning is achieved through another pair of drive and driven wheels. Most systems use two independent motors to drive the tape feeding / retraction drive wheels and the tensioning drive wheels, while the tape feeding / retraction driven wheels and the tensioning driven wheels are controlled by cams, each with its own set of connecting rods that engage with the drive wheels. There is also a type of tape feeding / retraction device where the tape feeding / retraction drive wheels and the tensioning drive wheels are driven by the same motor. In this case, when the tensioning drive wheel rotates, the tape feeding / retraction drive wheel also rotates. Because the tape feeding / retraction driven wheel is very close to the drive wheel, it may generate additional excessive friction, causing unnecessary wear on the tensioning drive wheel and the strapping tape. Utility Model Content

[0003] The purpose of this invention is to provide a feeding / retarding belt tensioning device that, in a configuration where both the feeding / retarding belt drive wheel and the tensioning belt drive wheel are driven by the same motor, avoids unnecessary wear on the tensioning belt driven wheel and the packing strap. To this end, this invention adopts the following technical solution:

[0004] A belt tensioning device includes a belt feed / retardation drive wheel and a belt feed / retardation driven wheel, a tensioning drive wheel and a tensioning driven wheel, wherein the belt feed / retardation driven wheel is connected to a rotatable first connecting seat, and the tensioning driven wheel is connected to a rotatable second connecting seat; characterized in that the first and second connecting seats are configured to cooperate, and the second connecting seat is provided with an action part, and the first connecting seat is provided with a cooperation part. Through the cooperation of the action part and the cooperation part, during belt tensioning, the second connecting seat drives the tensioning driven wheel to move closer to the tensioning drive wheel, thereby forcing the first connecting seat to drive the belt feed / retardation driven wheel to move away from the belt feed / retardation drive wheel, thus actively separating the belt feed / retardation driven wheel and the belt feed / retardation drive wheel. After the belt tensioning is completed, the second connecting seat rotates back, removing the action of the first connecting seat driving the belt feed / retardation driven wheel to move away from the belt feed / retardation drive wheel.

[0005] Based on the above technical solutions, this utility model may also employ the following further technical solutions, or a combination of these further technical solutions:

[0006] The feed-and-retreat belt drive pulley is located above the tension belt drive pulley, and the feed-and-retreat belt driven pulley is located above the tension belt driven pulley. The rotation center of the second connecting seat is higher than the top of the tension belt drive pulley and the tension belt driven pulley. The rotation center of the first connecting seat is located below the feed-and-retreat belt driven pulley and lower than the rotation center of the feed-and-retreat belt drive pulley. The center of the feed-and-retreat belt driven pulley is higher than the rotation center of the feed-and-retreat belt drive pulley. The actuating part is located on the top of the second connecting seat on the side closest to the tension belt drive pulley.

[0007] The active part rises and pushes against the mating part during the movement of the driven pulley of the tension belt near the driving pulley of the tension belt driven pulley, and the upper part of the driving pulley of the feed belt engages with the lower part of the driven pulley of the feed belt driven pulley.

[0008] The mating part is located at the lower part of the first connecting seat on the side near the feed and unfeed belt drive wheel, offset from the rotation fulcrum of the first connecting seat. Under the action of the upper push, the first connecting seat rotates, causing the feed and unfeed belt driven wheel to leave the feed and unfeed belt drive wheel.

[0009] The first connecting seat is rotatably connected to the support seat. The first connecting seat is driven to rotate in cooperation with the first linkage assembly, so that the feed and unload driven wheel enters the feed and unload state. The second connecting seat is rotatably connected to the support seat. The second connecting seat is driven to rotate in connection with the second linkage assembly, so that the tension belt driven wheel moves closer to or away from the tension belt driving wheel.

[0010] The first linkage assembly includes an upper push assembly and an elastic reset assembly. The first connecting seat is pushed up by the upper push assembly to bring the belt feed / retractor pulley close to the belt feed / retractor drive pulley and enter the belt retraction state. After belt retraction, the first connecting seat is separated from the upper push assembly, and the elastic reset assembly maintains the first connecting seat in the position where the belt feed / retractor pulley is in the belt feeding state.

[0011] The upper assembly includes a vertically lifting vertical linkage assembly, and the elastic reset assembly includes a rod connected to the first connecting seat and a reset elastic element.

[0012] The circumferential surface of the feed / retract belt drive wheel and / or tension belt drive wheel is provided with a groove that matches the width of the packing strap. Correspondingly, the width of the feed / retract belt driven wheel and / or tension belt driven wheel corresponds to the width of the groove and can be embedded in the groove.

[0013] The feed belt drive pulley and the tension belt drive pulley are driven by the same motor. The motor drives the feed belt drive pulley to rotate through a belt transmission mechanism and drives the tension belt drive pulley to rotate through a gear reduction mechanism.

[0014] The second connector connects to the reset elastic element.

[0015] By adopting the technical solution of this utility model, when the belt is tensioned, the second connecting seat drives the driven wheel of the tensioning belt to move closer to the driving wheel of the tensioning belt, thereby forcing the first connecting seat to move in the direction of driving the driven wheel of the feed belt away from the driving wheel of the feed belt. This actively separates the driven wheel of the feed belt and the driving wheel of the feed belt, avoiding misfitting when the belt is working, which would cause unnecessary wear to the driven wheel of the tensioning belt and the packing strap. Attached Figure Description

[0016] Figure 1 This is a front view of an embodiment of the present invention in the tensioned state.

[0017] Figure 2 This is a rear view of an embodiment of the present invention in the conveyor belt feeding / retracting state.

[0018] Figure 3 This is a three-dimensional schematic diagram of an embodiment of the present invention viewed from the front.

[0019] Figure 4 This is a three-dimensional schematic diagram of an embodiment of the present invention, viewed from the rear.

[0020] Figure 5 This is a rear view of an embodiment of the present utility model.

[0021] Figure 6 This is a front view showing the mating of the second connecting seat and the first connecting seat in an embodiment of this utility model.

[0022] Figure 7 This is a perspective view of the cooperation between the second connecting seat and the first connecting seat in an embodiment of this utility model.

[0023] Figure 8 This is a schematic diagram showing the cooperation between the drive pulley and the driven pulley of the feed and retraction belt in an embodiment of this utility model.

[0024] Figure 9 This is a schematic diagram showing the cooperation between the driving wheel and the driven wheel of the tension belt in an embodiment of this utility model.

[0025] Figure 10 This is a schematic diagram of the connection structure between the motor and the tension belt drive pulley and the feed belt drive pulley of this utility model. Detailed Implementation

[0026] Referring to the accompanying drawings, this utility model provides a belt feeding / retarding tensioning device, including a belt feeding / retarding drive wheel 11 and a belt feeding / retarding driven wheel 12, a tensioning drive wheel 21 and a tensioning driven wheel 22. The belt feeding / retarding driven wheel 12 is connected to a first connecting seat 100, and the tensioning driven wheel 22 is connected to a second connecting seat 200. The first connecting seat 100 is rotatably connected to the core seat of the packaging machine, i.e., the support seat 500. The first connecting seat 100 is also driven to rotate in cooperation with a first connecting rod assembly 3, causing the belt feeding / retarding driven wheel to enter the belt feeding state and the belt retraction state. The second connecting seat 200 is rotatably connected to the support seat 500, and the second connecting seat 200 is also driven to rotate in connection with a second connecting rod assembly 4, causing the tensioning driven wheel 22 to move towards or away from the tensioning drive wheel 21. The first connecting seat 100 and the second connecting seat 200 are configured to cooperate. The second connecting seat 200 is provided with an action part 201, and the first connecting seat 100 is provided with a mating part 101. Through the cooperation of the action part 201 and the mating part 101 (which can be a direct cooperation or a cooperation through an intermediate component), the second connecting seat 200 can directly or indirectly act on the first connecting seat 100. When the belt is tightened, the second connecting seat 200 drives the driven wheel 22 of the belt to move closer to the driving wheel 21 of the belt (in this embodiment, it is...). Figure 1 , Figure 2 The second connecting seat 200 rotates clockwise, forcing the first connecting seat 100 to drive the feed / retract belt driven pulley 12 away from the feed / retract belt driving pulley 11, thus actively separating the feed / retract belt driven pulley 12 and the feed / retract belt driving pulley 11 to avoid engagement during belt tensioning. After belt tensioning is completed, the second connecting seat 200 rotates counterclockwise, removing its effect on the first connecting seat 100 to drive the feed / retract belt driven pulley 12 away from the feed / retract belt driving pulley 11. The first connecting seat 100 can then perform movements for both feeding and retracting the belt. The second connecting seat 200 is connected to a reset elastic element 203 and is driven to rotate by the reset elastic element 203.

[0027] To improve the effect of this separate movement and to avoid affecting the tensioning and feeding / retracting of the strapping, a preferred arrangement is as follows: the feeding / retracting drive wheel 11 is positioned above the tensioning drive wheel 21, the feeding / retracting driven wheel 12 is positioned above the tensioning driven wheel 22, the rotation center 202 of the second connecting seat is positioned higher than the tops of the tensioning drive wheel 21 and the tensioning driven wheel 22, the rotation center 102 of the first connecting seat is positioned below the feeding / retracting driven wheel 12 and lower than the rotation center of the feeding / retracting drive wheel, the center of the feeding / retracting driven wheel 12 is higher than the rotation center of the feeding / retracting drive wheel, and the action part 201 is located on the top of the second connecting seat 200 on the side closest to the tensioning drive wheel 21.

[0028] The actuating part 201, during the movement of the second connecting seat 200 driving the tension belt driven pulley 22 to press against the tension belt driving pulley 21, rises and pushes against the mating part 101. The mating part 110 of the feed-and-retreat belt driving pulley 11 and the feed-and-retreat belt driven pulley 12 is located on the upper part of the side near the feed-and-retreat belt driving pulley 11. The mating part 101 is located on the lower part of the first connecting seat 100 on the side near the feed-and-retreat belt driving pulley 11, offset from the rotation fulcrum 102 of the first connecting seat. Under the action of the upward push, the first connecting seat 100 rotates (in... Figure 1 , Figure 2 (The rotation is clockwise), causing the driven pulley 12 of the feed belt to disengage from the driving pulley 11 of the feed belt.

[0029] The first linkage assembly 3 includes an upper push assembly 31 and an elastic reset assembly 32. The first connecting seat 100 is pushed up by the upper push assembly 31 to bring the belt feed / retract drive wheel 12 close to the belt feed / retract drive wheel 11 and enter the belt retraction state. After belt retraction, it separates from the upper push assembly 31, and the elastic reset assembly 32 maintains the first connecting seat in the position that puts the belt feed / retract drive wheel in the belt feeding state.

[0030] The upper assembly 31 includes a vertically lifting vertical linkage assembly 311, and the elastic reset assembly 32 includes a rod 321 connected to the first connecting seat and a reset elastic element 322.

[0031] As shown in the figure, the cam 600 has two cam surfaces 601 and 602. Cam surface 601 is the circumferential surface of the cam 600 and controls the upper push assembly 31. Cam surface 602 is the end face of the cam 600 and controls the second link assembly 4. This allows the cam surfaces 601 and 602 to be set on the same cam 600 and driven by the same motor 702 without interfering with each other.

[0032] The circumferential surfaces of the feed / retractor drive wheel 11 and / or tensioner drive wheel 21 are provided with grooves 110 and 210 that match the width of the packing strap. Correspondingly, the widths of the feed / retractor driven wheel 12 and / or tensioner driven wheel 22 correspond to the widths of the grooves 110 and 210, allowing them to be inserted into the grooves. This ensures accurate packing strapping and facilitates the accurate forward and backward movement of the feed / retractor driven wheel 12 using the grooves 110.

[0033] The feed belt drive wheel 11 and the tension belt drive wheel 21 are driven by the same motor 701. The motor 701 drives the feed belt drive wheel 11 to rotate through the belt transmission mechanism 801 and drives the tension belt drive wheel 21 to rotate through the gear reduction mechanism 802.

[0034] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, 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. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

[0035] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the protection scope of the present utility model.

Claims

1. A tape feeding and withdrawing tensioner comprising a tape feeding and withdrawing driving wheel and a tape feeding and withdrawing driven wheel, a tape tensioning driving wheel and a tape tensioning driven wheel, the tape feeding and withdrawing driven wheel being connected to a first rotatable connecting seat, and the tape tensioning driven wheel being connected to a second rotatable connecting seat; characterized in that, The first connecting seat and the second connecting seat are configured to cooperate. The second connecting seat is provided with an action part, and the first connecting seat is provided with a cooperation part. Through the cooperation of the action part and the cooperation part, when the belt is tightened, the second connecting seat drives the driven wheel of the tensioning belt to move closer to the driving wheel of the tensioning belt, thereby forcing the first connecting seat to drive the driven wheel of the feed belt to move away from the driving wheel of the feed belt, thus actively separating the driven wheel of the feed belt and the driving wheel of the feed belt. After the belt is tightened, the second connecting seat rotates, removing the action of the first connecting seat driving the driven wheel of the feed belt to move away from the driving wheel of the feed belt.

2. A belt feeding and tensioning device as claimed in claim 1, characterized in that The feed-and-retreat belt drive pulley is located above the tension belt drive pulley, and the feed-and-retreat belt driven pulley is located above the tension belt driven pulley. The rotation center of the second connecting seat is higher than the top of the tension belt drive pulley and the tension belt driven pulley. The rotation center of the first connecting seat is located below the feed-and-retreat belt driven pulley and lower than the rotation center of the feed-and-retreat belt drive pulley. The center of the feed-and-retreat belt driven pulley is higher than the rotation center of the feed-and-retreat belt drive pulley. The actuating part is located on the top of the second connecting seat on the side closest to the tension belt drive pulley.

3. A tape feeding and take-up device as claimed in claim 1 or 2, characterized in that The active part rises and pushes against the mating part during the movement of the driven pulley of the tension belt near the driving pulley of the tension belt driven pulley, and the upper part of the driving pulley of the feed belt engages with the lower part of the driven pulley of the feed belt driven pulley.

4. A belt feeding and tensioning device as claimed in claim 3, characterized in that The mating part is located at the lower part of the first connecting seat on the side near the feed and unfeed belt drive wheel, offset from the rotation fulcrum of the first connecting seat. Under the action of the upper push, the first connecting seat rotates, causing the feed and unfeed belt driven wheel to leave the feed and unfeed belt drive wheel.

5. A belt feeding and tensioning device as claimed in claim 1, characterized in that The first connecting seat is rotatably connected to the support seat. The first connecting seat is driven to rotate in cooperation with the first linkage assembly, so that the feed and unload driven wheel enters the feed and unload state. The second connecting seat is rotatably connected to the support seat. The second connecting seat is driven to rotate in connection with the second linkage assembly, so that the tension belt driven wheel moves closer to or away from the tension belt driving wheel.

6. The belt tensioning device as described in claim 1, characterized in that, The first linkage assembly includes an upper push assembly and an elastic reset assembly. The first connecting seat is pushed up by the upper push assembly to bring the belt feed / retractor pulley close to the belt feed / retractor drive pulley and enter the belt retraction state. After belt retraction, the first connecting seat is separated from the upper push assembly, and the elastic reset assembly maintains the first connecting seat in the position where the belt feed / retractor pulley is in the belt feeding state.

7. The belt tensioning device as described in claim 1, characterized in that, The circumferential surface of the feed / retract belt drive wheel and / or tension belt drive wheel is provided with a groove that matches the width of the packing strap. Correspondingly, the width of the feed / retract belt driven wheel and / or tension belt driven wheel corresponds to the width of the groove and can be embedded in the groove.

8. The feeding and unloading tensioning device as described in claim 1, characterized in that, The feed belt drive pulley and the tension belt drive pulley are driven by the same motor. The motor drives the feed belt drive pulley to rotate through a belt transmission mechanism and drives the tension belt drive pulley to rotate through a gear reduction mechanism.

9. A belt tensioning device as described in claim 6, characterized in that, The upper assembly includes a vertically lifting vertical linkage assembly, and the elastic reset assembly includes a rod connected to the first connecting seat and a reset elastic element.

10. The belt tensioning device as described in claim 1, characterized in that, The second connector connects to the reset elastic element.

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