Belt feeding, withdrawing and tensioning device of packing machine

Abstract

The utility model provides a belt feeding and withdrawing and tensioning device of a packing machine, which is provided with a swing structure, the swing structure comprises a swing mounting frame, a speed reducing mechanism and a second motor are mounted on the swing mounting frame, and a tensioning wheel is connected with the speed reducing mechanism and is connected with the second motor through the speed reducing mechanism. And the swinging mounting frame, the second motor, the speed reducing mechanism and the tensioning wheel swing to a tensioning working position together, so that the driving tensioning wheel driven by the second motor through the speed reducing mechanism is matched with the belt feeding and withdrawing driving wheel to perform tensioning work and reset. The belt feeding device can guarantee high belt feeding speed, when the belt is tensioned, the swing mounting frame, the second motor, the speed reducing mechanism and the tensioning wheel swing to a tensioning working position together, the belt feeding and withdrawing driving wheel is matched with the driving tensioning wheel, the wrap angle is large, the large reduction ratio and the large tensioning force can be achieved, different working modes can be provided, and the belt feeding and withdrawing device is suitable for large-scale popularization and application. And the requirements of tensioning belts in different occasions are met.

Description

Technical Field

[0001] The utility model relates to a baling machine, in particular to a feeding and retracting belt and a tensioning belt device of the baling machine. Background Art

[0002] The strapping machine is a device that uses strapping tape to tie items. The entire strapping process involves the steps of feeding, unwinding, tightening, and hot gluing. The feeding and tensioning belt device, which consists of three wheels that form the feeding and tensioning belt actuator, includes a driving wheel, a feeding and tensioning belt pressure wheel, and a tensioning wheel. The feeding and tensioning belt pressure wheel and the tensioning wheel passively lean against the driving wheel when feeding and tensioning the belt, respectively, and can tighten the belt to the driving wheel. For feeding, a fast speed is required, so the motor reduction ratio requirement is smaller, but for tensioning, a large reduction ratio is required to have a greater tensioning force, which cannot guarantee a fast feeding speed. When tightening the belt, a large angle and a large tensioning force are required. Utility Model Content

[0003] The purpose of the utility model is to provide a feeding and retracting belt and tensioning belt device for a baler, so as to solve the problems mentioned in the background technology. To this end, the utility model adopts the following technical solutions:

[0004] The cam is an electrically-operated, dual-clutch transmission mechanism, wherein the cam is adapted to rotate the tension wheel to move the first and second motors, and the cam is adapted to rotate the second motor in a direction opposite to the first motor.

[0005] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions, or use these further technical solutions in combination:

[0006] The swing structure is provided with a swing driving mechanism connected with the swing mounting frame.

[0007] The swing driving structure includes a driving cam, and a first rotating connecting rod matched with the driving cam, a first elastic element, and a second connecting rod movably connected to the first rotating connecting rod and capable of being driven by the first rotating connecting rod. The swing mounting frame is provided with a connecting structure, which is connected to the second connecting rod through the connecting structure, and can be driven by the second connecting rod to swing and form a lever structure. The connecting structure forms a power arm with the swing fulcrum of the swing mounting frame as the fulcrum, and the resistance arm is between the center of gravity of the swing structure and the swing fulcrum, and the power arm is longer than the resistance arm; the first elastic element enables the structure or component on the first rotating connecting rod that matches with the cam to match with the driving cam.

[0008] The first rotating link is provided with a hole, the second link is inserted into the hole and engaged with the first rotating link to be driven to rise and fall, the connecting structure is sleeved on the second link and is driven by the second link, and in the direction of entering the tensioning working position, the second lifting link acts on the connecting structure through the second elastic element.

[0009] The swing mounting frame is provided with a main annular structure, a speed reducing mechanism is provided inside the main annular structure, the second motor is provided outside one end of the main annular structure, the tensioning wheel is provided outside the other end of the main annular structure, the feeding and retracting belt and the tensioning belt device are provided with a tensioning wheel end cover, the tensioning wheel end cover is located at the outer end of the tensioning wheel and swings synchronously with the tensioning wheel, the tensioning wheel end cover is also provided with a guide belt structure, and the guide belt structure is combined with the guide belt track of the baling machine.

[0010] The tension wheel is located below the side of the feeding and retracting belt driving wheel; the guide belt track is the guide belt track below the feeding and retracting belt driving wheel, and the guide belt structure constitutes a side track wall at the upper end of the guide belt track.

[0011] The speed reduction mechanism adopts a planetary gear reducer, and the planetary gear reducer is provided with multi-stage planetary gears, and the inner ring of the tension wheel is provided as a gear ring meshing with the last stage of planetary gears.

[0012] The deceleration mechanism adopts a planetary gear reducer, the main annular structure is a variable diameter structure with a circumferential diameter change, and the base of the baler is provided with a hole for the smaller diameter section of the main annular structure to pass through and swing.

[0013] The base of the baler is provided with a hole for the speed reduction mechanism to pass through and swing; the main annular structure and the tension wheel are respectively located on both sides of the base.

[0014] The delivery and retraction belt and tensioning belt devices are provided with swing mounting frame limiting structures corresponding to the tensioning working positions.

[0015] The limiting distance of the limiting structure of the swing mounting frame is that the gap between the tension wheel and the driving wheel of the feeding and retracting belt is smaller than the thickness of the packing belt, but the tension wheel will not touch the driving wheel of the feeding and retracting belt.

[0016] The feeding and retracting belt driving wheel is a large feeding and retracting belt driving wheel, and its diameter is larger than that of the tensioning wheel.

[0017] The outer surface of the active tension wheel is arranged as a first row of convex tooth surfaces.

[0018] The outer surface of the driving wheel of the feeding and retracting belt is arranged as a second row of convex tooth surfaces.

[0019] The outer surface of the active tension wheel is set as a first row of convex teeth surface, and the outer surface of the retracting belt active wheel is set as a second row of convex teeth surface, and the second row of convex teeth and the second row of convex teeth intersect and cooperate with each other.

[0020] The first row of convex teeth is a row of convex teeth that is oblique to the axial direction.

[0021] The second row of convex teeth is a row of convex teeth parallel to the axial direction.

[0022] The technical solution provided by the utility model can ensure a fast belt feeding speed. When tightening the belt, the swing mounting frame, the second motor, the speed reduction mechanism and the tensioning wheel swing together to the tensioning working position, the belt feeding and retracting active wheel cooperates with the active tensioning wheel, the wrap angle is large, and a large speed reduction ratio can be achieved. The tensioning force is large, and different working modes can be provided to meet the tensioning belt needs in different occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of one side of the embodiment provided by the utility model.

[0024] Figure 2 This is a front view of another side of the embodiment provided by the utility model.

[0025] Figure 3 This is a schematic diagram of an embodiment provided by the utility model.

[0026] Figure 4 This is a structural explosion diagram of an embodiment provided by the utility model.

[0027] Figure 5 This is the structural explosion diagram of the planetary reduction mechanism.

[0028] Figure 6 and Figure 7 They are schematic diagrams of the large driving wheel and the tensioning wheel respectively. DETAILED DESCRIPTION

[0029] Refer to the accompanying drawings. The feeding and retracting belt and tensioning belt device of the baling machine provided by the utility model comprises a tensioning wheel 1, a feeding and retracting belt pressure wheel 2 and a feeding and retracting belt driving wheel 3. The feeding and retracting belt driving wheel 3 is connected to a first bidirectional driving motor 31 and can actively rotate in both directions to feed and retract the belt. The figure numeral 100 is the baling belt. The tensioning wheel 1 and the feeding and retracting belt pressure wheel 2 are arranged along the circumference of the feeding and retracting belt driving wheel 3. In the direction of retracting and tensioning the belt, the tensioning wheel 1 is located downstream of the feeding and retracting belt pressure wheel 2. The feeding and retracting belt driving wheel 3 is a large feeding and retracting belt wheel, and its diameter is larger than that of the tensioning wheel 1.

[0030] The feed and retract belt and tensioning belt device is also provided with a swinging structure, which includes a swinging mounting frame 4, which is rotatably connected to the base 300 of the feed and retract belt and tensioning belt device with an axis 40 as a swinging fulcrum, and a reduction mechanism 6 and a second motor 7 are installed on the swinging mounting frame 4, and the tensioning wheel 1 is connected to the reduction mechanism 6, and is connected to the second motor 7 through the reduction mechanism 6. When the tensioning belt is working, the swinging mounting frame 4, the second motor 7, the reduction mechanism 6 and the tensioning wheel 1 swing together to the tensioning working position so that the active tensioning wheel 1 driven by the second motor 7 through the reduction mechanism 6 cooperates with the feed and retract belt active wheel 3 to perform the tensioning work, so that when not working in tensioning, the swinging mounting frame 4, the second motor 7, the reduction mechanism 6 and the tensioning wheel 1 swing in the opposite direction and reset.

[0031] The swing structure is provided with a swing driving mechanism connected to the swing mounting frame. In this embodiment, the swing driving structure adopts a set of swing driving mechanisms suitable for a relatively heavy swing object, including a driving cam 200, and a first rotating link 201 matched with the driving cam 200, a first elastic element 202, and a second link 203 connected with the first rotating link 201 and driven by the first rotating link 201, the first rotating link 201 is rotatably mounted on the base 300, the swing mounting frame 4 is provided with a connecting structure 41, which is connected with the second link 203 through the connecting structure 41, and can be driven by the second link 203 to swing and form a lever structure, the connecting structure 41 forms a power arm with the swing fulcrum of the swing mounting frame 4, i.e., the shaft 40, as the fulcrum, and the resistance arm is between the center of gravity of the swing structure and the swing fulcrum, i.e., the shaft 40, and the power arm is longer than the resistance arm; the first elastic element 202 enables the component (the roller 204 in this embodiment) on the first rotating link 201 that matches the cam to match with the driving cam 200. The rotation of the driving cam 200 can be driven by a cam driving motor in the movement of the baling machine.

[0032] The connection between the first rotating link 201 and the second connecting rod 203 can be driven to rise and fall by means of a snap connection. In this embodiment, the first rotating link 201 is provided with a hole, and after the second connecting rod is inserted into the hole, it is snap-connected with the hole of the first rotating link 201 through the lower nut 2031 and the upper step 2032. The connecting structure 41 is sleeved on the second connecting rod 203, and in the direction of entering the tightening working position, the second connecting rod 203 acts on the connecting structure 41 through the second elastic element 205. In this embodiment, when the second connecting rod 203 descends (that is, the first rotating link is located below the driving cam 200, and when the first rotating link 201 rotates downward, the swing mounting frame 4, the second motor 7, the speed reduction mechanism 6 and the tensioning wheel 1 are driven to swing to the tightening working position together), the second elastic element 205 is sleeved on the second connecting rod 2 on the connecting structure.

[0033] The swing mounting frame 4 is provided with a main annular structure 42, the connecting structure 41 is connected to the main annular structure 42, and a speed reduction mechanism 6 is provided in the main annular structure 42. The speed reduction mechanism 6 preferably adopts a planetary gear speed reduction mechanism. In this embodiment, the planetary gear speed reduction mechanism adopts a three-stage planetary gear speed reduction, which are respectively labeled 61, 62, and 63. The inner ring of the tension wheel 1 is set as a gear ring 11 engaged with the last stage planetary gear, which can be a multi-stage planetary gear speed reduction mechanism, which can greatly reduce the volume and obtain a high reduction ratio. The second motor 7 is arranged outside one end of the main annular structure 42, and the tension wheel 1 is arranged outside the other end of the main annular structure 42 and is sleeved outside the last stage planetary gear 63. The main annular structure 42 is a variable diameter structure with a circumferential diameter change. The base of the baler is provided with a hole 300 for the smaller diameter section of the main annular structure 42 to pass through and swing, which can further make the structure compact.

[0034] The feeding and retracting belt and the tensioning belt device are provided with a tensioning wheel end cover 43, and the tensioning wheel end cover 43 is located at the outer end of the tensioning wheel 1 and swings synchronously with the tensioning wheel 1. During implementation, the tensioning wheel end cover 43 can be connected to the mounting component in the deceleration mechanism. The tensioning wheel end cover 43 is also provided with a guide belt structure 44, and the guide belt structure 44 is combined with the guide belt track 400 of the baling machine.

[0035] The tension wheel 1 is located below the side of the feeding and retracting belt driving wheel 3 ; the belt guide track 400 is the belt guide track below the feeding and retracting belt driving wheel 3 , and the belt guide structure 43 constitutes a side track wall at the upper end of the belt guide track 400 .

[0036] The feed-return belt and tensioning belt device is provided with a swing mounting frame limiting structure 5 corresponding to the tensioning working position. When the tensioning wheel 1 approaches the feed-return belt driving wheel 3, the tensioning wheel 1 is restricted from hitting the feed-return belt driving wheel 3, thereby playing a role in structural safety protection. The optimal limiting distance is that the gap between the tensioning wheel and the feed-return belt driving wheel is smaller than the thickness of the packing belt 100, but the tensioning wheel 1 does not hit the feed-return belt driving wheel 3. It can be a stop pin installed on the base 300.

[0037] The outer surface of the active tension wheel can be set as a first row of convex tooth surfaces 12, which can better grip the belt when tightening it, prevent it from slipping, and ensure the tensioning force.

[0038] The outer surface of the belt feeding and retracting driving wheel can also be set as a second row of convex tooth surface 32 to improve the friction force when feeding and retracting the belt.

[0039] In this embodiment, the outer surface of the active tensioning wheel is set as a first row of convex tooth surface 12, and the outer surface of the retracting belt active wheel is set as a second row of convex tooth surface 32. The arrangement of the first row of convex teeth and the arrangement of the second row of convex teeth 32 are non-parallel. More preferably, the second row of convex teeth is a row of convex teeth parallel to the axial direction.

[0040] For the belt-feeding and retracting pressure wheel 2, an eccentric wheel may be used, which is rotatably connected to the connecting rod 21, one end of which is connected to the tension spring 22, and the other end is connected to the push rod 23, and the push rod 23 is driven by the second rotating connecting rod 25 controlled by the second cam 24. The second cam 24 and the driving cam may be coaxially arranged and driven by the cam driving motor in the movement of the baler.

[0041] When the tape is being fed, the second cam 24 controls the second rotating link 25 through the arc surface, and the feed-retract belt pressure wheel 2 is located at its initial position by the action of the tension spring 22. When the tape is being unloaded, the cam 1 rotates to the convex portion to control the second rotating link 25, and the push rod 23 pushes against the link 21, so that the feed-retract belt pressure wheel 2, under the action of the eccentric shaft, moves closer to the feed-retract belt driving wheel 3, completing the tape unloading action.

[0042] During the tensioning action, the driving cam 200 drives the swing mounting frame 4 to swing around the swing fulcrum, the tensioning wheel 1 approaches the feeding and retracting belt driving wheel 3, and the second motor 7 drives the tensioning wheel to rotate through the speed reduction mechanism 6 to complete the tensioning action.

[0043] Unless otherwise specified, in the present invention, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial" and the like indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0044] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "clamped" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the protection scope of the present invention.

Claims

1. The feeding and retracting belt and tensioning belt device of the baling machine comprises a tensioning wheel, a feeding and retracting belt pressure wheel and a feeding and retracting belt driving wheel, wherein the feeding and retracting belt driving wheel is connected to a first bidirectional driving motor and can actively rotate in both directions, and the tensioning wheel and the feeding and retracting belt pressure wheel are arranged along the circumference of the feeding and retracting belt driving wheel, and in the direction of retracting and tensioning the belt, the tensioning wheel is located downstream of the feeding and retracting belt pressure wheel; characterized in that: The delivery and retraction belt device is also provided with a swinging structure, and the swinging structure includes a swinging mounting frame, on which a reduction mechanism and a second motor are mounted, and the tensioning wheel is connected to the reduction mechanism, and is connected to the second motor through the reduction mechanism, and the swinging mounting frame, the second motor, the reduction mechanism and the tensioning wheel swing together to the tensioning working position so that the active tensioning wheel driven by the second motor through the reduction mechanism cooperates with the delivery and retraction belt active wheel to perform tensioning and resetting.

2. The delivery and tensioning belt device according to claim 1, characterized in that The swing structure is provided with a swing driving mechanism connected with the swing mounting frame.

3. The delivery and tensioning belt device according to claim 2, characterized in that The swing driving mechanism includes a driving cam, and a first rotating connecting rod matched with the driving cam, a first elastic element, and a second connecting rod movably connected to the first rotating connecting rod and capable of being driven by the first rotating connecting rod. The swing mounting frame is provided with a connecting structure, which is connected to the second connecting rod through the connecting structure, and can be driven by the second connecting rod to swing and form a lever structure. The connecting structure forms a power arm with the swing fulcrum of the swing mounting frame as the fulcrum, and the resistance arm is between the center of gravity of the swing structure and the swing fulcrum, and the power arm is longer than the resistance arm; the first elastic element enables the structure or component on the first rotating connecting rod that matches with the cam to match with the driving cam.

4. The delivery and tensioning belt device according to claim 3, characterized in that The first rotating link is provided with a hole, the second link is inserted into the hole and engaged with the first rotating link to be driven to rise and fall, the connecting structure is sleeved on the second link and is driven by the second link, and in the direction of entering the tensioning working position, the second link acts on the connecting structure through the second elastic element.

5. The delivery and tensioning belt device according to claim 1, characterized in that The swing mounting frame is provided with a main annular structure, a speed reducing mechanism is provided inside the main annular structure, the second motor is provided outside one end of the main annular structure, the tensioning wheel is provided outside the other end of the main annular structure, the feeding and retracting belt and the tensioning belt device are provided with a tensioning wheel end cover, the tensioning wheel end cover is located at the outer end of the tensioning wheel and swings synchronously with the tensioning wheel, the tensioning wheel end cover is also provided with a guide belt structure, and the guide belt structure is combined with the guide belt track of the baling machine.

6. The delivery and tensioning belt device according to claim 5, characterized in that The tension wheel is located below the side of the feeding and retracting belt driving wheel; the guide belt track is the guide belt track below the feeding and retracting belt driving wheel, and the guide belt structure constitutes a side track wall at the upper end of the guide belt track.

7. The delivery and tensioning belt device according to claim 1, characterized in that The speed reduction mechanism adopts a planetary gear reducer, and the planetary gear reducer is provided with multi-stage planetary gears, and the inner ring of the tension wheel is provided as a gear ring meshing with the last stage of planetary gears.

8. The delivery and tensioning belt device according to claim 5, characterized in that The deceleration mechanism adopts a planetary gear reducer, the main annular structure is a variable diameter structure with a circumferential diameter change, and the base of the baler is provided with a hole for the smaller diameter section of the main annular structure to pass through and swing.

9. The delivery and tensioning belt device according to claim 5, characterized in that The base of the baler is provided with a hole for the speed reduction mechanism to pass through and swing; the main annular structure and the tension wheel are respectively located on both sides of the base.

10. The delivery and tensioning belt device according to claim 1, characterized in that The delivery and retraction belt and tensioning belt devices are provided with swing mounting frame limiting structures corresponding to the tensioning working positions.

11. The delivery and tensioning belt device according to claim 8, characterized in that The limiting distance of the limiting structure of the swing mounting frame is that the gap between the tension wheel and the driving wheel of the feeding and retracting belt is smaller than the thickness of the packing belt, but the tension wheel will not touch the driving wheel of the feeding and retracting belt.

12. The feeding and retracting belt and tensioning belt device according to claim 1, characterized in that: The feeding and retracting belt driving wheel is a large feeding and retracting belt driving wheel, and its diameter is larger than that of the tensioning wheel.

13. The delivery and tensioning belt device according to claim 1, characterized in that The outer surface of the active tension wheel is arranged as a first row of convex tooth surfaces.

14. The delivery and tensioning belt device according to claim 1, characterized in that The outer surface of the driving wheel of the feeding and retracting belt is arranged as a second row of convex tooth surfaces.

15. The delivery and tensioning belt device according to claim 13, characterized in that The first row of convex teeth is a row of convex teeth that is oblique to the axial direction.

16. The delivery and tensioning belt device according to claim 14, characterized in that The second row of convex teeth is a row of convex teeth parallel to the axial direction.

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