Film cutter rest

Abstract

The utility model discloses a film cutter rest which comprises a support, a cutter shaft and a cutter, a first end of the cutter shaft is rotatably installed on the support, an expansion shaft sleeve is arranged on the periphery of a second end of the cutter shaft, an expansion cavity is arranged between the expansion shaft sleeve and the cutter shaft, and the second end of the cutter shaft is provided with a first piston channel communicated with the expansion cavity. Hydraulic oil is arranged in the expansion cavity and the first piston channel, a first piston assembly is arranged in the first piston channel, and the cutter is installed on the periphery of the expansion shaft sleeve. The first piston assembly feeds along the first piston channel, hydraulic oil in the expansion cavity can be compressed, then the expansion shaft sleeve deforms and expands, a tiny gap between the expansion shaft sleeve and an inner hole of the cutter is eliminated, and the cutter is kept stable in the rotating process. When the cutter needs to be replaced, the first piston assembly retreats along the first piston channel, the hydraulic oil in the expansion cavity is decompressed, the expansion shaft sleeve recovers to the initial state, a tiny gap is formed between the expansion shaft sleeve and the inner hole of the cutter, the cutter can be rapidly pushed out of the expansion shaft sleeve, and the structure is reasonable and effective.

Description

TECHNICAL FIELD

[0001] The utility model relates to food, medicine packing machinery technical field especially, relate to a film cutting knife frame. BACKGROUND

[0002] The cantilever type die cutting knife frame can realize quick replacement of the cutting knife, and in order to facilitate manual quick replacement of the cutting knife, the cutting knife inner hole tolerance and the cantilever shaft diameter tolerance need to be controlled, so that there is a certain gap between the cantilever shaft diameter and the cutting knife inner hole, thereby manual pushing and pulling replacement can be realized. Since the gap between the cutting knife inner hole and the cantilever shaft diameter cannot be eliminated, this will lead to the existence of slight misalignment between the cutting knife and the cantilever shaft axis during rotation (i.e. the movement between the axes of the two parts), which affects the cutting knife effect. SUMMARY

[0003] The utility model wants to overcome the insufficient of prior art, provide a film cutting knife frame that is convenient for cutting knife quick replacement and is beneficial to the stable rotation of the cutting knife.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A film cutting knife frame, comprising a support, a knife shaft and a cutting knife, the first end of the knife shaft is rotatably mounted on the support, the second end of the knife shaft is provided with an expansion sleeve, the expansion sleeve and the knife shaft are provided with an expansion cavity, the second end of the knife shaft is provided with a first piston passage communicated with the expansion cavity, the expansion cavity and the first piston passage are provided with hydraulic oil, the first piston passage is provided with a first piston assembly, and the cutting knife is installed on the outer periphery of the expansion sleeve.

[0006] As a further improvement of the above technical scheme: the inner wall of the expansion sleeve is provided with a plurality of annular grooves, and the annular grooves are distributed along the axial direction.

[0007] As a further improvement of the above technical scheme: the second end of the knife shaft is provided with a plurality of radial shunt passages, the first end of the radial shunt passage is communicated with the first piston passage, and the second end of the radial shunt passage is communicated with the expansion cavity.

[0008] As a further improvement of the above technical scheme: the first piston assembly comprises a first piston and a first adjusting member for driving the first piston to move, the first end of the first adjusting member is movably connected with the first piston, and the second end of the first adjusting member is screw connected with the side wall of the first piston passage.

[0009] As a further improvement of the above technical solution: the first piston is provided with a first connecting hole, the first end of the first adjusting piece is arranged in the first connecting hole and is provided with a first limiting flange, the side wall of the first connecting hole is provided with a second limiting flange for preventing the first limiting flange from falling out, and one side of the first connecting hole is provided with a notch portion for taking out the first limiting flange.

[0010] As a further improvement of the above technical solution: the outer periphery of the first piston is provided with at least one sealing piece.

[0011] As a further improvement of the above technical solution: the two ends of the expansion sleeve are welded to the cutter shaft.

[0012] As a further improvement of the above technical solution: the first end of the cutter shaft is provided with a second piston channel communicated with the expansion cavity, the second piston channel is provided with hydraulic oil, and the second piston channel is provided with a second piston assembly.

[0013] As a further improvement of the above technical solution: the cutter shaft is further provided with an exhaust channel communicated with the second piston channel, the exhaust channel is provided with a detachable plug, and the exhaust channel is arranged at one end of the second piston channel close to the expansion cavity.

[0014] As a further improvement of the above technical solution: the first piston channel and the second piston channel are arranged in the axial direction.

[0015] Compared with the prior art, the film cutter frame has the advantages that:

[0016] The film cutter frame disclosed by the utility model, the first piston assembly feeds along the first piston channel, can compress the hydraulic oil in the expansion cavity, and further makes the expansion sleeve generate deformation and expansion, eliminates the tiny gap between the expansion sleeve and the inner hole of the cutter, and makes the cutter keep stable during rotation; when the cutter needs to be replaced, the first piston assembly retreats along the first piston channel, the hydraulic oil in the expansion cavity is depressurized, the expansion sleeve returns to the initial state, a tiny gap is formed between the expansion sleeve and the inner hole of the cutter, the cutter can be quickly pushed out of the expansion sleeve, and the structure is reasonable and effective.

[0017] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. ACCURATE DRAWINGS

[0018] Figure 1 It is the three-dimensional structure schematic view of the film cutter frame of the utility model.

[0019] Figure 2 It is the structure schematic view of the expansion sleeve in the utility model in the unexpanded state.

[0020] Figure 3This is a schematic diagram of the expansion bushing in this utility model after being compressed and expanding.

[0021] Figure 4 This is a schematic diagram of the radial flow distribution channel in this utility model.

[0022] Figure 5 This is an enlarged structural schematic diagram of the first piston assembly in this utility model.

[0023] Figure 6 This is a three-dimensional structural diagram of the first piston in this utility model.

[0024] The labels in the diagram represent: 1. Bracket; 2. Cutter shaft; 21. First piston channel; 22. Radial flow channel; 23. Second piston channel; 24. Exhaust channel; 25. Plug; 3. Cutter; 4. Expansion sleeve; 41. Expansion chamber; 42. Annular groove; 5. First piston assembly; 51. First piston; 511. First connecting hole; 512. Second limiting flange; 513. Notch; 514. Seal; 52. First adjusting component; 521. First limiting flange; 6. Second piston assembly. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figures 1 to 6 This invention illustrates an embodiment of the film cutter holder, which includes a support 1, a cutter shaft 2, and a cutter 3. The first end of the cutter shaft 2 ( Figures 1 to 3 The right end of the cutter shaft 2 is rotatably mounted on the bracket 1, and the second end of the cutter shaft 2 is... Figures 1 to 3 An expansion sleeve 4 is provided on the outer periphery of the left end of the blade shaft 2. An expansion cavity 41 is provided between the expansion sleeve 4 and the blade shaft 2. A first piston channel 21 communicating with the expansion cavity 41 is provided at the second end of the blade shaft 2. Hydraulic oil is provided in the expansion cavity 41 and the first piston channel 21. A first piston assembly 5 is provided in the first piston channel 21. The cutter 3 is installed on the outer periphery of the expansion sleeve 4.

[0030] In this embodiment, the first piston assembly 5 feeds along the first piston channel 21, which can compress the hydraulic oil in the expansion chamber 41, thereby causing the expansion sleeve 4 to deform and expand, eliminating the tiny gap between the expansion sleeve 4 and the inner hole of the cutter 3, and keeping the cutter 3 stable during rotation. When the cutter 3 needs to be replaced, the first piston assembly 5 retracts along the first piston channel 21, the hydraulic oil in the expansion chamber 41 is depressurized, and the expansion sleeve 4 returns to its initial state, forming a tiny gap between it and the inner hole of the cutter 3, which can quickly push the cutter 3 out of the expansion sleeve 4. The structure is reasonable and effective.

[0031] See details Figure 2 and Figure 3 In this embodiment, the inner wall of the expansion sleeve 4 is provided with multiple annular grooves 42, which are spaced apart along the axial direction. Providing multiple annular grooves 42 on the inner wall of the expansion sleeve 4 facilitates better deformation and expansion of the expansion sleeve 4 under pressure. Preferably, the cross-section of the annular grooves 42 is U-shaped, which facilitates deformation and expansion of the expansion sleeve 4 under pressure and is also easy to process.

[0032] See details Figure 5In this embodiment, the second end of the cutter shaft 2 is provided with multiple radial flow channels 22 (e.g., 3 to 5). The first end of the radial flow channel 22 is connected to the first piston channel 21, and the second end of the radial flow channel 22 is connected to the expansion chamber 41. When the first piston assembly 5 feeds along the first piston channel 21, the hydraulic oil in the first piston channel 21 enters the expansion chamber 41 through the radial flow channels 22, which helps to make the hydraulic oil flow evenly into the expansion chamber 41.

[0033] See details Figure 4 In this embodiment, the first piston assembly 5 includes a first piston 51 and a first adjusting member 52 for moving the first piston 51. The first end of the first adjusting member 52 is movably connected to the first piston 51, and the second end of the first adjusting member 52 is threadedly connected to the side wall of the first piston channel 21. The movable connection between the first adjusting member 52 and the first piston 51 can prevent the first piston 51 from obstructing the rotation of the first adjusting member 52. At the same time, when the first adjusting member 52 is rotated, the first piston 51 can be pushed and pulled, so that the first piston 51 can reciprocate within the first piston channel 21. Furthermore, the threaded connection between the first adjusting member 52 and the side wall of the first piston channel 21 allows for continuous adjustment of the feed amount of the first piston 51, thereby adjusting the expansion degree of the expansion sleeve 4. The structure is simple and reliable.

[0034] See details Figure 4 and Figure 6 In this embodiment, the first piston 51 is provided with a first connecting hole 511, and the first end of the first adjusting member 52 is provided in the first connecting hole 511 and is provided with a first limiting flange 521. The side wall of the first connecting hole 511 is provided with a second limiting flange 512 for preventing the first limiting flange 521 from falling out. A notch 513 for removing the first limiting flange 521 is provided on one side of the first connecting hole 511. By cooperating with the first limiting flange 521, the first adjusting member 52 can pull the first piston 51 back, preventing the two from separating. After the first adjusting member 52 and the first piston 51 are completely withdrawn from the first piston channel 21, the notch 513 can be used to separate the first adjusting member 52 from the first piston 51, which facilitates maintenance, replacement and other operations of the first piston 51.

[0035] In a preferred embodiment, the outer periphery of the first piston 51 is provided with at least one sealing element 514 (e.g., O-ring, sealing packing, etc.), which helps to ensure the sealing between the first piston 51 and the cutter shaft 2 and prevent hydraulic oil leakage in the first piston channel 21.

[0036] As a preferred embodiment, the expansion sleeve 4 is welded to the cutter shaft 2 at both ends, which helps to ensure a reliable connection between the expansion sleeve 4 and the cutter shaft 2, withstand the pressure of hydraulic oil, and has good sealing performance and is easy to process and manufacture.

[0037] See detailsFigure 2 and Figure 3 In this embodiment, the first end of the cutter shaft 2 is provided with a second piston channel 23 communicating with the expansion chamber 41. Hydraulic oil is provided in the second piston channel 23, and a second piston assembly 6 is provided in the second piston channel 23. During the first oil injection, oil can be injected through the first piston channel 21 and air can be discharged through the second piston channel 23. The structure is simple and the venting effect is good. At the same time, it is also convenient to preset the hydraulic pressure, or to pre-expand the expansion sleeve 4 by a certain amount, further improving the expansion efficiency of the quick-change cutter 3. The structure of the second piston assembly 6 can be the same as that of the first piston assembly 5, and will not be described again.

[0038] Furthermore, in this embodiment, the cutter shaft 2 is also provided with an exhaust channel 24 communicating with the second piston channel 23. The exhaust channel 24 is provided with a detachable plug 25, and the exhaust channel 24 is located at one end of the second piston channel 23 near the expansion chamber 41. During the first oil filling, the plug 25 is removed, and the air in the oil chamber and oil passage can also be discharged from the exhaust channel 24, achieving a more complete purpose of air removal. The structure is simple and effective. Preferably, the plug 25 and the cutter shaft 2 are also connected by threads, which has good reliability and is convenient for disassembly and assembly.

[0039] In some embodiments, the first piston channel 21 and the second piston channel 23 are both arranged axially, so that the first piston assembly 5 and the second piston assembly 6 can have a large stroke, which facilitates the adjustment of the expansion degree of the expansion sleeve 4, and the structure is simple and easy to process.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A membrane cutting blade holder, characterized in that: The device includes a bracket (1), a cutter shaft (2), and a cutter (3). The first end of the cutter shaft (2) is rotatably mounted on the bracket (1). An expansion sleeve (4) is provided on the outer periphery of the second end of the cutter shaft (2). An expansion cavity (41) is provided between the expansion sleeve (4) and the cutter shaft (2). The second end of the cutter shaft (2) is provided with a first piston channel (21) communicating with the expansion cavity (41). Hydraulic oil is provided in the expansion cavity (41) and the first piston channel (21). A first piston assembly (5) is provided in the first piston channel (21). The cutter (3) is mounted on the outer periphery of the expansion sleeve (4).

2. The membrane cutting blade holder according to claim 1, characterized in that: The inner wall of the expansion bushing (4) is provided with a plurality of annular grooves (42), and the plurality of annular grooves (42) are distributed at intervals along the axial direction.

3. The membrane cutting blade holder according to claim 1, characterized in that: The second end of the cutter shaft (2) is provided with a plurality of radial flow channels (22). The first end of the radial flow channel (22) is connected to the first piston channel (21), and the second end of the radial flow channel (22) is connected to the expansion chamber (41).

4. The film cutter holder according to any one of claims 1 to 3, characterized in that: The first piston assembly (5) includes a first piston (51) and a first adjusting member (52) for moving the first piston (51). The first end of the first adjusting member (52) is movably connected to the first piston (51), and the second end of the first adjusting member (52) is threadedly connected to the side wall of the first piston channel (21).

5. The membrane cutter holder according to claim 4, characterized in that: The first piston (51) is provided with a first connecting hole (511), the first end of the first adjusting member (52) is provided in the first connecting hole (511) and is provided with a first limiting flange (521), the side wall of the first connecting hole (511) is provided with a second limiting flange (512) for preventing the first limiting flange (521) from falling out, and a notch (513) for taking out the first limiting flange (521) is provided on one side of the first connecting hole (511).

6. The membrane cutting blade holder according to claim 4, characterized in that: The first piston (51) has at least one seal (514) on its outer periphery.

7. The membrane cutter holder according to any one of claims 1 to 3, characterized in that: The expansion bushing (4) is welded to the cutter shaft (2) at both ends.

8. The film cutter holder according to any one of claims 1 to 3, characterized in that: The first end of the cutter shaft (2) is provided with a second piston channel (23) that communicates with the expansion chamber (41). Hydraulic oil is provided in the second piston channel (23), and a second piston assembly (6) is provided in the second piston channel (23).

9. The membrane cutting blade holder according to claim 8, characterized in that: The cutter shaft (2) is also provided with an exhaust channel (24) communicating with the second piston channel (23). The exhaust channel (24) is provided with a removable plug (25). The exhaust channel (24) is located at one end of the second piston channel (23) near the expansion chamber (41).

10. The membrane cutting blade holder according to claim 8, characterized in that: Both the first piston passage (21) and the second piston passage (23) are arranged axially.

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