Unwinding mechanism for circular knife machine

Abstract

The utility model discloses an unreeling mechanism for a circular knife machine, which comprises an unreeling mechanism and at least one expansion shaft component, the unreeling mechanism comprises a driving piece and a rotating shaft, one end of the rotating shaft is connected with the output end of the driving piece, the at least one expansion shaft component is sleeved on the rotating shaft, the expansion shaft component comprises at least two core plates and at least one locking piece, the two core plates are each provided with at least one groove, the two opposite sides of each core plate are provided with a first magnet and a second magnet respectively, the magnetic poles of the first magnets and the magnetic poles of the second magnets attract each other, and the first magnets and the second magnets on one sides of the two core plates are close to each other and can be spliced to define a cylindrical shaft sleeve with a circular channel. The two grooves are formed in the outer wall of the cylindrical shaft sleeve in a surrounding mode to form an annular avoiding groove, and when the rotating shaft is arranged in the circular channel in a penetrating mode, the locking piece is arranged in the annular avoiding groove in a sleeved mode so that the cylindrical shaft sleeve and the rotating shaft can be fixed. The problem that the expansion shaft assembly is inconvenient to fix on the rotating shaft by a single operator is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of unwinding machines, and particularly relates to an unwinding mechanism for a circular knife machine. Background Art

[0002] An unwinding mechanism generally refers to a device used to unwind or release coils (such as paper, film, metal foil, etc.) during various processing operations. Such mechanisms are widely used in industries such as printing, packaging, and metal processing. The design of the unwinding mechanism needs to consider factors such as the characteristics of the material (such as thickness, width, material, etc.), the unwinding speed, and whether tension control is required.

[0003] Since the inner diameter of the rotating cylinder is larger than the inner diameter of the rotating shaft of the unwinding mechanism, it is difficult to fix the rotating cylinder on the rotating shaft. Therefore, a swelling shaft assembly needs to be customized. By first fixing the swelling shaft assembly on the rotating shaft, the outer diameter of the swelling shaft assembly is adapted to the inner diameter of the rotating cylinder. In actual work, it is difficult for a single operator to fix the swelling shaft assembly on the rotating shaft. Usually, one operator needs to splice multiple core plates to form a cylindrical bushing with a circular channel, and the rotating shaft passes through the circular channel. At the same time, both hands hold the cylindrical bushing to prevent it from falling off the rotating shaft, and another operator sleeves the annular locking piece on the cylindrical bushing to fix the cylindrical bushing on the rotating shaft. Therefore, it is necessary to design an unwinding mechanism for a circular knife machine to solve the problem that it is inconvenient for a single operator to install the swelling shaft assembly. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide an unwinding mechanism for a circular knife machine to solve the problem that it is inconvenient for a single operator to fix the swelling shaft assembly on the rotating shaft in the prior art.

[0005] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an unwinding mechanism for a circular knife machine. The unwinding mechanism includes a driving member and a rotating shaft. One end of the rotating shaft is connected to the output end of the driving member. The unwinding mechanism further includes at least one swelling shaft assembly sleeved on the rotating shaft. The swelling shaft assembly includes at least two core plates and at least one locking member. At least one groove is provided on each of the two core plates. A first magnet and a second magnet are respectively provided on the opposite sides of the core plate, and the magnetic poles of the first magnet and the second magnet attract each other. The first magnets and the second magnets on one side of the two core plates are close to each other to be spliced and enclosed to form a cylindrical bushing with a circular channel. And an annular avoidance groove is formed by enclosing the two grooves on the outer wall of the cylindrical bushing. When the rotating shaft passes through the circular channel, the locking member is sleeved in the annular avoidance groove to fix the cylindrical bushing to the rotating shaft.

[0007] In some embodiments, the driving member includes a base and a reduction motor fixed on the base, and the output end of the reduction motor is fixedly connected to one end of the rotating shaft.

[0008] In some embodiments, wear-resistant layers are provided on the outer walls of both of the core plates.

[0009] In some embodiments, a support assembly is further included. The support assembly includes a telescopic member and a top block. The telescopic member is fixedly connected to the base and is located below the rotating shaft, and the movable end of the telescopic member is fixedly connected to the top block. The telescopic member is used to drive the top block to support the other end of the rotating shaft.

[0010] In some embodiments, a roller is rotatably provided at the other end of the rotating shaft, and a semi-circular arc-shaped card slot having the same diameter as the roller is formed on the top block. When the top block supports the other end of the rotating shaft, the roller is located in the semi-circular arc-shaped card slot.

[0011] In some embodiments, the telescopic member is an electric push rod, a pneumatic cylinder or a hydraulic cylinder.

[0012] In some embodiments, the number of the annular avoidance grooves is 1 - 3.

[0013] In some embodiments, both the first magnet and the second magnet are strong magnetic blocks.

[0014] In some embodiments, both of the core plates are made of nylon plates.

[0015] In some embodiments, the locking member is an annular spiral spring or an elastic rubber ring.

[0016] Compared with the prior art, for a unwind mechanism for a circular knife machine provided by the present utility model, one end of the rotating shaft is connected to the output end of the driving member. At least one groove is provided on each of the two core plates. A first magnet and a second magnet are respectively provided on the opposite sides of the core plates, and the magnetic poles of the first magnet and the second magnet attract each other. The first magnet and the second magnet on one side of the two core plates are close to each other to be spliced and enclosed to form a cylindrical shaft sleeve having a circular channel, and an annular avoidance groove is formed by enclosing the two grooves on the outer wall of the cylindrical shaft sleeve. When the cylindrical shaft sleeve is sleeved on the rotating shaft, the two core plates will not fall off under the action of magnetic force. An operator only needs to sleeved the locking member on the annular avoidance groove to fix the cylindrical shaft sleeve to the rotating shaft. Only a single operator is required to install the expanding shaft assembly on the rotating shaft. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an unwind mechanism for a circular knife machine provided by an embodiment of the present utility model;

[0018] Figure 2It is a schematic structural diagram of the expanding shaft assembly provided by an embodiment of the present utility model;

[0019] Figure 3 It is a partial cross-sectional view of the expanding shaft assembly provided by an embodiment of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the support assembly provided by an embodiment of the present utility model. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] In order to solve the technical problem in the prior art that it is inconvenient for a single operator to fix the expanding shaft assembly on the rotating shaft, the present utility model provides a unwinding mechanism for a circular knife machine, which only requires a single operator to fix the expanding shaft assembly on the rotating shaft, with a simple structure and convenient operation.

[0023] Please refer to Figures 1 - 4 , Figures 1 - 4 As shown in, it is an unwinding mechanism for a circular knife machine in an embodiment of the present utility model. The unwinding mechanism 1 includes a driving member 11 and a rotating shaft 12. One end of the rotating shaft 12 is connected to the output end of the driving member 11. The unwinding mechanism further includes at least one expanding shaft assembly 13 sleeved on the rotating shaft 12. The expanding shaft assembly 13 includes at least two core plates 131 and at least one locking member 132. At least one groove 1311 is provided on each of the two core plates 131. A first magnet 1312 and a second magnet 1313 are respectively provided on opposite sides of the core plate 131, and the magnetic poles of the first magnet 1312 and the second magnet 1313 attract each other. The first magnets 1312 and the second magnets 1313 on one side of the two core plates 131 are close to each other to form a cylindrical shaft sleeve with a circular channel by splicing. And the two grooves 1311 enclose an annular avoidance groove on the outer wall of the cylindrical shaft sleeve. When the rotating shaft 12 passes through the circular channel, the locking member 132 is sleeved in the annular avoidance groove to fix the cylindrical shaft sleeve to the rotating shaft 12.

[0024] In this specific embodiment, the driving member 11 includes a base 111 and a reduction motor 112 fixed on the base 111. The output end of the reduction motor 112 is fixedly connected to one end of the rotating shaft 12. Among them, the base 111 includes a bottom plate and a vertical plate fixedly connected to the bottom plate. The reduction motor 112 is fixed on the vertical plate, and the axis of the rotating shaft 12 is parallel to the horizontal ground.

[0025] In this specific embodiment, the number of the core plates 131 is three. The three core plates 131 enclose to form a cylindrical bushing with a circular channel. Among them, the core plates 131 are made of nylon plates.

[0026] In addition, 1-3 annular relief grooves are provided on each core plate 131. In this specific embodiment, two annular relief grooves are provided on each core plate 131, that is, the outer wall of the cylindrical bushing has two annular relief grooves, and the two annular relief grooves are respectively located at opposite ends of the cylindrical bushing.

[0027] In this specific embodiment, both the first magnet 1312 and the second magnet 1313 are strong magnetic blocks. When one side of two core plates 131 approaches, the first magnet 1312 and the second magnet 1313 attract each other, and one side of the two core plates 131 can be connected.

[0028] In this specific embodiment, the locking member 132 is an annular spiral spring. Of course, in other embodiments, the locking member 132 can also be an elastic rubber ring.

[0029] On the basis of the above solution, in order to increase the friction between the cylindrical bushing and the rotating cylinder, specifically, wear-resistant layers 1314 are provided on the outer walls of the two core plates 131. The wear-resistant layers 1314 are in contact with the inner wall of the rotating cylinder A to ensure that the rotating cylinder can rotate around its own axis along with the rotating shaft 12.

[0030] On the basis of the above solution, in order to increase the support strength of the rotating shaft 12, specifically, a support assembly 2 is further included. The support assembly 2 includes a telescopic member 21 and a top block 22. The telescopic member 21 is fixedly connected to the base 111 and is located below the rotating shaft 12, and the movable end of the telescopic member 21 is fixedly connected to the top block 22. The telescopic member 21 is used to drive the top block 22 to support the other end of the rotating shaft 12.

[0031] In addition, a roller 14 is rotatably provided at the other end of the rotating shaft 12, and a semi-circular arc-shaped card slot having the same diameter as the roller 14 is formed on the top block 22. When the top block 22 supports the other end of the rotating shaft 12, the roller 14 is located in the semi-circular arc-shaped card slot.

[0032] It should be noted that the telescopic member 21 is an electric push rod. Of course, in other embodiments, the telescopic member 21 can also be a pneumatic cylinder or a hydraulic cylinder.

[0033] For a better understanding of the present invention, the following Figures 1 to 4 will detail the technical solution of the present invention:

[0034] The operator arranges the three core plates axially around the rotating shaft 12. When one side of two adjacent core plates 131 approaches each other, one side of the two adjacent core plates 131 can be fixed together under the action of the magnetic forces of the first magnet 1312 and the second magnet 1313. After the three core plates enclose to form a cylindrical bushing, the locking piece can be sleeved in the two annular avoidance grooves.

[0035] The specific implementation manners of the present utility model described above do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A unwind mechanism for a circular knife machine, the unwind mechanism comprising a driving member and a rotating shaft, one end of the rotating shaft being connected to the output end of the driving member, characterized in that, It further includes at least one expanding shaft assembly, the expanding shaft assembly is sleeved on the rotating shaft, the expanding shaft assembly includes at least two core plates and at least one locking member, at least one groove is provided on each of the two core plates, a first magnet and a second magnet are respectively provided on opposite sides of the core plate, and the magnetic poles of the first magnet and the second magnet attract each other. The first magnets and the second magnets on one side of the two core plates are close to each other and can be spliced and enclosed to form a cylindrical shaft sleeve with a circular channel, and the two grooves enclose an annular avoidance groove on the outer wall of the cylindrical shaft sleeve. When the rotating shaft is inserted into the circular channel, the locking member is sleeved in the annular avoidance groove for fixing the cylindrical shaft sleeve and the rotating shaft.

2. The unwind mechanism for a circular knife machine according to claim 1, wherein, The driving member includes a base and a reduction motor fixed on the base, and the output end of the reduction motor is fixedly connected to one end of the rotating shaft.

3. A unwind mechanism for a circular knife machine according to claim 1, characterized in that, Wear-resistant layers are provided on the outer walls of the two core plates.

4. The unwinding mechanism for a circular knife machine according to claim 2, characterized in that: It further includes a support assembly, the support assembly includes a telescopic member and a top block, the telescopic member is fixedly connected to the base and is located below the rotating shaft, and the movable end of the telescopic member is fixedly connected to the top block, and the telescopic member is used to drive the top block to support the other end of the rotating shaft.

5. The unwind mechanism for a circular knife machine according to claim 4, characterized in that, A roller is rotatably provided at the other end of the rotating shaft, and a semi-circular arc-shaped card slot with the same diameter as the roller is provided on the top block. When the top block supports the other end of the rotating shaft, the roller is located in the semi-circular arc-shaped card slot.

6. The unwinding mechanism for a circular knife machine according to claim 4, characterized in that: The telescopic member is an electric push rod, a pneumatic cylinder or a hydraulic cylinder.

7. The unwinding mechanism for a circular knife machine according to claim 1, characterized in that: The number of the annular avoidance grooves is 1-3.

8. The unwind mechanism for a circular knife machine according to claim 1, characterized in that, Both the first magnet and the second magnet are strong magnetic blocks.

9. The unwind mechanism for a circular knife machine according to claim 1, characterized in that, Both of the two core plates are made of nylon plates.

10. A unwind mechanism for a circular knife machine according to claim 1, characterized in that, The locking member is an annular spiral spring or an elastic rubber ring.

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