Shaft sleeve with inflatable shaft convenient to maintain and replace

Abstract

The utility model relates to the technical field of film production, in particular to a shaft sleeve with an air expansion shaft convenient to maintain and replace, which comprises an air expansion shaft main body, a shaft head is arranged at the end of the air expansion shaft main body, two flat keys are symmetrically arranged on the side edge of the shaft head, a taper sleeve is coaxially sleeved on the shaft head, and the taper sleeve is fixedly connected with the shaft head through a fixing bolt. According to the utility model, the taper sleeve can be replaced after being abraded, the operation is simple and easy to learn, the working efficiency is improved, the maintenance cost is effectively reduced, and the maintenance downtime is reduced.

Description

Technical Field

[0001] This utility model relates to the field of thin film production technology, and in particular to a bushing with an air expansion shaft that can be easily repaired and replaced. Background Technology

[0002] Air shafts are commonly used in various production operations that require winding, unwinding, and slitting. Therefore, air shafts are widely used in film production and can be used for tension control during film processing.

[0003] In daily film production, with prolonged use, the cones of various air shafts on the production line will gradually wear down, causing vibration and affecting production. Therefore, every once in a while, the entire air shaft and airbag need to be disassembled and sent out for maintenance. The maintenance cycle is long, which wastes manpower and is extremely inefficient.

[0004] To address this issue, we propose a bushing with a design that allows for easy maintenance and replacement of the air shaft. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bushing with a convenient air shaft for maintenance and replacement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bushing with an air shaft that allows for easy maintenance and replacement includes an air shaft body, an air shaft head at one end of the air shaft body, two flat keys symmetrically arranged on the side of the air shaft head, and a tapered sleeve provided on the air shaft head and the bushing, the tapered sleeve being fixedly connected to the air shaft head by fixing bolts.

[0008] Preferably, the tapered sleeve has an inner cavity that matches the shaft head sleeve, and the side wall of the inner cavity has a groove that matches the two flat keys.

[0009] Preferably, the end face of the tapered sleeve away from the inner cavity is provided with a coaxial through hole, and the fixing bolt is inserted into the through hole to match. The shaft head is provided with a threaded hole coaxially matching the thread of the fixing bolt, and the fixing bolt can pass through the through hole and be screwed into the threaded hole.

[0010] Preferably, the end face of the conical sleeve facing away from the inner cavity is provided with two slots, which are symmetrically arranged on both sides of the through hole.

[0011] Preferably, the slot may be provided with internal threads.

[0012] Preferably, the end face of the conical sleeve facing away from the inner cavity is also provided with a rubber band, the rubber band has a round hole in the middle, and a cylindrical sleeve coaxially fixed on the rubber band and aligned with the round hole, one end of the fixing bolt is provided with a screw, and the other end is provided with a socket for matching a hexagonal wrench, and the cylindrical sleeve can be inserted into the socket.

[0013] Preferably, both ends of the rubber strip are fixed with plugs, and the two plugs are inserted into and engaged with the two slots respectively.

[0014] Preferably, two support arms are symmetrically fixedly installed at the ends of the air shaft body, and a shifting block is provided between the two support arms. Both support arms are rotatably connected to the middle of the shifting block through a rotating shaft. Both ends of the shifting block are matched with a shaft head and a tapered sleeve. A fixing pin mechanism is provided between the shifting block and the two support arms.

[0015] Preferably, the fixing pin mechanism includes a rectangular pin that slides through two support arms and a shifting block. Both support arms and the shifting block are provided with rectangular holes that match the insertion of the rectangular pin. One end of the rectangular pin is provided with a first positioning block, which is snap-fitted to the rectangular pin. The other end of the rectangular pin is fixedly provided with a second positioning block. The two support arms are provided with positioning grooves that match the first and second positioning blocks, and both ends of the first positioning block can be fixedly connected to the corresponding support arm by two fastening screws.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model, by setting a detachable and replaceable tapered sleeve that matches the shaft head, allows for direct replacement after wear. The overall operation is simple and easy to learn, convenient and efficient, effectively avoiding the problem of long maintenance cycles, effectively improving work efficiency, and effectively reducing maintenance costs and downtime. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a partial isometric view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the tapered sleeve and the shaft head after separation according to this utility model;

[0021] Figure 3 This is a schematic diagram of the internal cavity structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the existing cone head structure;

[0023] Figure 5 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0028] Figure 10 This is a schematic diagram of the structure of one embodiment of the present utility model.

[0029] In the diagram: 1. Air shaft body; 2. Shaft head; 3. Flat key; 4. Tapered sleeve; 5. Fixing bolt; 6. Inner cavity; 7. Groove; 8. Through hole; 9. Threaded hole; 10. Slotted hole; 11. Rubber belt; 12. Round hole; 13. Cylindrical sleeve; 14. Plug; 15. Tapered head; 16. Support arm; 17. Shifting block; 18. Rectangular pin; 19. First positioning block; 20. Second positioning block; 21. Fastening screw. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Example 1

[0033] Reference Figure 1-4A bushing with a convenient maintenance and replacement function for an air shaft includes an air shaft body 1, with a shaft head 2 at each end of the air shaft body 1. Two flat keys 3 are symmetrically arranged on the sides of the shaft head 2. A tapered sleeve 4 is fitted onto the shaft head 2, and the tapered sleeve 4 is fixedly connected to the shaft head 2 by fixing bolts 5. The tapered sleeve 4 corresponds to the existing tapered head 15 of an air shaft, as detailed in [reference needed]. Figure 4 .

[0034] For the above example, those skilled in the art should know that when implementing the above technical solution, the air shaft body 1 of this device is the existing air shaft, which is often used in various production operations that require winding, unwinding and slitting. Therefore, in film production, air shafts are widely used and can be used for tension control during film processing.

[0035] For the above example, those skilled in the art should know that when implementing the above technical solution, the flat key 3 is embedded and connected to the shaft head 2, that is, the flat key 3 can be disassembled and replaced.

[0036] The tapered sleeve 4 has an inner cavity 6 that matches the shaft head 2, and the side wall of the inner cavity 6 has a groove 7 that matches the two flat keys 3.

[0037] The tapered sleeve 4 has a coaxial through hole 8 on its end face away from the inner cavity 6. The fixing bolt 5 passes through and matches the through hole 8. The shaft head 2 has a threaded hole 9 coaxially matched with the thread of the fixing bolt 5. The fixing bolt 5 can pass through the through hole 8 and be screwed into the threaded hole 9. That is, after the tapered sleeve 4 is fitted onto the shaft head 2, the two flat keys 3 are inserted into the two corresponding grooves 7. Then, by passing the fixing bolt 5 through the through hole 8 and screwing it into the threaded hole 9 and locking it, the tapered sleeve 4 can be fixed onto the shaft head 2.

[0038] The tapered sleeve 4 has two slots 10 through its end face away from the inner cavity 6, and the two slots 10 are symmetrically arranged on both sides of the through hole 8.

[0039] The slot 10 may have an internal thread. The tapered sleeve 4 can be pushed out through the two slots 10 using existing tools, or the tapered sleeve 4 can be removed by clamping the two slots 10 with relevant tools.

[0040] The working principle is as follows:

[0041] In daily film production, with prolonged use, the tapered sleeve 4 on the corresponding shaft head 2 wears down, causing vibration and affecting production. Disassembly and repair can then be performed, involving removing the tapered sleeve 4 and replacing it with a new one. The tapered sleeve 4 corresponds to the existing cone head 15 of the air shaft. Specifically, by removing the fixing bolt 5, the tapered sleeve 4 can be pushed out through the two slots 10 using existing tools, or by using relevant tools to clamp the two slots 10 and remove the tapered sleeve 4. Then, a new tapered sleeve 4 and flat key 3 are replaced, and the fixing bolt 5 is reinstalled and tightened, completing the repair operation. The overall operation is simple and easy to learn, convenient and efficient, effectively avoiding the problem of long maintenance cycles, significantly improving work efficiency, reducing maintenance costs, and minimizing downtime.

[0042] Example 2

[0043] Reference Figure 5-6 The difference between this embodiment and Embodiment 1 is that:

[0044] The end face of the tapered sleeve 4 facing away from the inner cavity 6 is also matched with a rubber band 11. The rubber band 11 has a round hole 12 in the middle. A cylindrical sleeve 13 coaxially aligned with the round hole 12 is fixed on the rubber band 11. One end of the fixing bolt 5 is provided with a screw, and the other end is provided with a socket that matches a hexagonal wrench. The cylindrical sleeve 13 can be inserted into the socket.

[0045] For the above example, those skilled in the art should know that when implementing the above technical solution, the hex wrench is an existing tool used to tighten the fixing bolt 5.

[0046] For the above example, those skilled in the art should know that when implementing the above technical solution, both the rubber belt 11 and the cylindrical sleeve 13 are made of rubber.

[0047] Both ends of the rubber band 11 are fixed with plugs 14, and the two plugs 14 are inserted into and locked into the two slots 10 respectively.

[0048] The working principle is as follows:

[0049] After fixing the tapered sleeve 4 to the shaft head 2 using the fixing bolt 5, two plugs 14 can be inserted into and engaged with the two slots 10 respectively. The cylindrical sleeve 13 in the middle of the rubber band 11 is then inserted into the socket of the fixing bolt 5 that matches the hex wrench. The inserted cylindrical sleeve 13 presses against one end of the fixing bolt 5. Combined with the restraining and positioning by the two plugs 14 and the rubber band 11, this effectively ensures that the fixing bolt 5 is not prone to loosening or detachment. When disassembling the tapered sleeve 4, the hex wrench can be directly inserted into the cylindrical sleeve 13 to unscrew the fixing bolt 5. The hex wrench presses against the cylindrical sleeve 13, causing it to contract and increasing friction, making it easier to unscrew the fixing bolt 5. During the unscrewing process, the rubber band 11 coils, allowing the tapered sleeve 4 to move and be pulled out along with the fixing bolt 5, achieving a convenient disassembly.

[0050] Example 3

[0051] Reference Figure 7-10 The difference between this embodiment and Embodiment 1 is that:

[0052] Two support arms 16 are symmetrically fixedly installed at the ends of the air shaft body 1. A shifting block 17 is provided between the two support arms 16. Both support arms 16 are rotatably connected to the middle of the shifting block 17 via a rotating shaft. Both ends of the shifting block 17 are equipped with a shaft head 2 and a tapered sleeve 4. A fixing pin mechanism is provided between the shifting block 17 and the two support arms 16. The positions of the two ends of the shifting block 17 can be adjusted, and the fixing pin mechanism can position and fix the shifting block 17 after adjustment.

[0053] For the above examples, those skilled in the art should know that when implementing the above technical solutions, the shaft head 2 and tapered sleeve 4 matched at both ends of the transposition block 17, i.e. the connection structure of shaft head 2 and tapered sleeve 4 in Embodiment 1, can also be the connection structure of shaft head 2 and tapered sleeve 4 in Embodiment 2.

[0054] The fixing pin mechanism includes a rectangular pin 18, which slides through two support arms 16 and a shifting block 17. Both support arms 16 and shifting block 17 are provided with rectangular holes that match the insertion of the rectangular pin 18. One end of the rectangular pin 18 is provided with a first positioning block 19, which is snap-fitted to the rectangular pin 18. The other end of the rectangular pin 18 is fixedly provided with a second positioning block 20. The two support arms 16 are respectively provided with positioning grooves that match the first positioning block 19 and the second positioning block 20. Both ends of the first positioning block 19 can be fixedly connected to the corresponding support arm 16 by two fastening screws 21. After the positions of the two ends of the transposition block 17 are swapped, a rectangular pin 18 is inserted into the side of one of the support arms 16 so that the second positioning block 20 fits into the positioning groove of the support arm 16. Then, the first positioning block 19 is snapped onto the other end of the rectangular pin 18 and fits into the corresponding positioning groove. Then, two fastening screws 21 are used to fix it to the corresponding support arm 16. Finally, the rectangular pin 18 effectively positions and fixes the adjusted transposition block 17.

[0055] The working principle is as follows:

[0056] In daily film production, with prolonged use, the tapered sleeve 4 on the corresponding shaft head 2 wears down, causing vibration and affecting production. In this case, the two ends of the shift block 17 can be swapped. Specifically, the unused, unworn tapered sleeve 4 at the other end is rotated out for connection. The operation involves first disassembling the first positioning block 19, then pulling out the rectangular pin 18, and rotating the shift block 17 to swap its ends. Then, the rectangular pin 18 is reinserted, ensuring the corresponding second positioning block 20 matches the positioning groove of the support arm 16. The first positioning block 19 is then snapped onto the other end of the rectangular pin 18 and fitted into the corresponding positioning groove. Two fastening screws 21 are then used to fix the first positioning block 19 to the corresponding support arm 16, thus positioning the rectangular pin 18. Finally, the rectangular pin 18 effectively positions and fixes the adjusted shift block 17.

[0057] When both cone sleeves 4 are worn, disassembly and maintenance can be performed. Then, the cone sleeves 4 at both ends of the transposition block 17 are disassembled and replaced, as in the specific operation of Embodiment 1 or Embodiment 2 above.

[0058] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bushing with a conveniently replaceable air shaft, comprising an air shaft body (1), characterized in that, The air shaft body (1) has a shaft head (2) at one end. Two flat keys (3) are symmetrically arranged on the side of the shaft head (2). A tapered sleeve (4) is coaxially fitted on the shaft head (2). The tapered sleeve (4) is fixedly connected to the shaft head (2) by a fixing bolt (5).

2. A bushing with a conveniently repairable and replaceable air shaft according to claim 1, characterized in that, The tapered sleeve (4) is provided with an inner cavity (6) that matches the shaft head (2), and the side wall of the inner cavity (6) is provided with a groove (7) that matches the two flat keys (3).

3. A bushing with a conveniently repairable and replaceable air shaft according to claim 2, characterized in that, The tapered sleeve (4) has a coaxial through hole (8) on the end face away from the inner cavity (6). The fixing bolt (5) is inserted into the through hole (8) and matched. The shaft head (2) is coaxially provided with a threaded hole (9) that matches the thread of the fixing bolt (5). The fixing bolt (5) can pass through the through hole (8) and be screwed into the threaded hole (9).

4. A bushing with a conveniently repairable and replaceable air shaft according to claim 3, characterized in that, The tapered sleeve (4) has two slots (10) through its end face away from the inner cavity (6), and the two slots (10) are symmetrically arranged on both sides of the through hole (8).

5. A bushing with a conveniently replaceable air shaft according to claim 4, characterized in that, The slot (10) may be provided with an internal thread.

6. A bushing with a conveniently repairable and replaceable air shaft according to claim 5, characterized in that, The end face of the conical sleeve (4) facing away from the inner cavity (6) is also provided with a rubber band (11). The rubber band (11) has a round hole (12) in the middle. A cylindrical sleeve (13) coaxially aligned with the round hole (12) is fixed on the rubber band (11). One end of the fixing bolt (5) is provided with a screw, and the other end is provided with a socket for matching a hexagonal wrench. The cylindrical sleeve (13) can be inserted into the socket.

7. A bushing with a conveniently replaceable air shaft according to claim 6, characterized in that, Both ends of the rubber strip (11) are fixed with plugs (14), and the two plugs (14) are inserted into and locked into the two slots (10) respectively.

8. A bushing with a conveniently repairable and replaceable air shaft according to claim 1, characterized in that, Two support arms (16) are symmetrically fixedly installed at the end of the air shaft body (1). A shift block (17) is provided between the two support arms (16). Both support arms (16) are rotatably connected to the middle of the shift block (17) through a rotating shaft. Both ends of the shift block (17) are matched with a shaft head (2) and a tapered sleeve (4). A fixing pin mechanism is provided between the shift block (17) and the two support arms (16).

9. A bushing with a conveniently repairable and replaceable air shaft according to claim 8, characterized in that, The fixing pin mechanism includes a rectangular pin (18), which slides through two support arms (16) and a shift block (17). Both support arms (16) and the shift block (17) are provided with rectangular holes that match the insertion of the rectangular pin (18). One end of the rectangular pin (18) is provided with a first positioning block (19), which is snap-fitted to the rectangular pin (18). The other end of the rectangular pin (18) is fixedly provided with a second positioning block (20). The two support arms (16) are respectively provided with positioning grooves that match the first positioning block (19) and the second positioning block (20). The two ends of the first positioning block (19) can be fixedly connected to the corresponding support arm (16) by two fastening screws (21).

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