Mechanical expansion shaft
By designing a mechanical expansion shaft, the driving components drive the support plate to move, so that the outer diameter of the outer jacket is changed, the problem that the roll film can only be unrolled from the outer ring, and the convenience and cost saving of unrolling the inner ring is realized.
Patent Information
- Application Number
- CN202422038024.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-21
AI Technical Summary
In the production of existing films, the rolled film can only be unrolled from the outer ring, and it is difficult to unroll from the inner ring, which affects subsequent processing efficiency and cost.
A mechanical expansion shaft is designed, including an end cover, an inner shaft, an outer jacket, a swing rod and a driving member. The driving member drives the support plate to move relative to the inner shaft, thereby increasing or decreasing the outer diameter of the outer jacket, realizing the separation of the roll film and making it easier to unwind from the inner ring.
It realizes the easy separation of the roll film and coat, eliminates the inner core, saves costs, and facilitates unwinding from the inner ring, and is suitable for film products with high viscosity.
Smart Images
Figure CN223060401U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of film production, in particular to a mechanical expansion shaft. Background Art
[0002] The edge trimmer of a film slitter uses a paper core winding method. Since the inner circle of the film is tightly wound around the central shaft, the central shaft and the wound film are relatively fixed. When it is necessary to unwind the wound film, it can only be unwound from the outer circle, while unwinding from the inner circle is more convenient for subsequent processing and production. How to make the wound film unwind from the inner circle is a difficult problem in this industry. Summary of the Utility Model
[0003] The utility model aims to at least solve one of the technical problems in the related technologies to some extent. For this purpose, the utility model provides a mechanical expansion shaft, which has the advantages of smooth unwinding and convenient use, and is particularly suitable for unwinding film products with relatively high viscosity, such as non-adhesive films containing a hot melt adhesive layer.
[0004] An embodiment of the utility model provides a mechanical expansion shaft, which comprises:
[0005] End caps;
[0006] An inner shaft, which is inserted through and rotatably connected to the end caps;
[0007] An outer sleeve, which is sleeved on the inner shaft, and the outer sleeve comprises a plurality of support plates distributed circumferentially along the inner shaft;
[0008] Swing rods, which are located between the inner shaft and the outer sleeve, and the plurality of swing rods correspond to the plurality of support plates one by one. One end of the swing rod is rotatably connected to the support plate, and the other end of the swing rod is rotatably connected to the inner shaft;
[0009] A driving component, which can drive the plurality of support plates to move along the axis relative to the inner shaft and drive the swing rods to rotate relative to the inner shaft so as to increase or decrease the outer diameter of the outer sleeve.
[0010] According to the mechanical expansion shaft of the embodiment of the utility model, it has at least the following technical effects: when it is necessary to wind the film, the driving component drives the support plates to swing away from the inner shaft, so that the outer diameter of the outer sleeve increases. After the film is wound on the outer sleeve with an increased outer diameter, the driving component drives the support plates to swing close to the inner shaft, so that the outer diameter of the outer sleeve decreases, so as to facilitate the separation of the wound film from the outer sleeve, and facilitate the wound film to unwind from the inner circle in the next process. After using this mechanical expansion shaft to wind the film, it can be easily separated from the wound film. At the same time, the inner core required for the wound film finished product is cancelled, the cost is saved, and it is convenient for the wound film to unwind from the inner circle in subsequent production and processing to meet different usage environments of the wound film.
[0011] According to some embodiments of the present utility model, on a projection plane perpendicular to the axis of the inner shaft, the projection of the support plate is arc-shaped, and the projections of multiple support plates are located on the same circle.
[0012] According to some embodiments of the present utility model, a plurality of convex strips are provided on the outer peripheral wall of the inner shaft, and the plurality of convex strips correspond to the plurality of support plates one by one. One end of the swing rod is hinged to the convex strip.
[0013] According to some embodiments of the present utility model, the inner shaft includes a circular shaft and a square shaft. The circular shaft passes through and is fixedly connected to the square shaft, and a plurality of the convex strips are provided on the outer side wall of the square shaft.
[0014] According to some embodiments of the present utility model, the inner shaft further includes a fixing cylinder. An annular groove is provided at one end of the square shaft, and the fixing cylinder is inserted into the annular groove. The fixing cylinder is fixedly connected to the circular shaft by bolts.
[0015] According to some embodiments of the present utility model, the driving component includes a cylinder and a return spring. The outer sleeve is located on the front side of the end cover, the cylinder is located on the front side of the outer sleeve, the front end of the return spring is connected to the outer sleeve, and the rear end of the return spring is connected to the end cover. The cylinder can push the outer sleeve backward, cause the support plate to swing away from the inner shaft, and compress the return spring by the outer sleeve. When the return spring is compressed, it has a biasing force that causes the support plate to swing close to the inner shaft.
[0016] According to some embodiments of the present utility model, the outer sleeve further includes a plurality of connecting rods, and the plurality of connecting rods correspond to the plurality of support plates one by one. The connecting rods are located between the support plate and the inner shaft. The side of the connecting rod away from the inner shaft is attached to and fixedly connected to the support plate. One end of the swing rod is hinged to the connecting rod.
[0017] According to some embodiments of the present utility model, the mechanical expansion shaft further includes a top ring, and the top ring is slidably connected to the end cover. The front end of the top ring abuts against the outer sleeve, the front end of the return spring is connected to the top ring, and the rear end of the return spring is connected to the end cover.
[0018] According to some embodiments of the present utility model, a convex column extends forward from the front end of the end cover, and the top ring is sleeved on the convex column.
[0019] According to some embodiments of the present utility model, a stop block is provided at the front end of the support plate, and the stop block is used to abut against the driving end of the cylinder.
[0020] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings
[0021] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:
[0022] Figure 1 is a schematic structural diagram of a mechanical expansion shaft according to some embodiments of the present utility model;
[0023] Figure 2 is a cross-sectional view of a mechanical expansion shaft according to some embodiments of the present utility model;
[0024] Figure 3 is an exploded view of a mechanical expansion shaft according to some embodiments of the present utility model.
[0025] Reference numerals in the drawings:
[0026] End cap 100, convex column 110;
[0027] Inner shaft 200, convex strip 201, circular shaft 210, square shaft 220, fixed cylinder 230, annular groove 240;
[0028] Outer sleeve 300, support plate 310, connecting rod 320, stop block 330;
[0029] Rocking bar 400, driving component 410, cylinder 411, return spring 412, top ring 420. Detailed Description of the Embodiments
[0030] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.
[0031] In the description of the present utility model, it should be understood that for the orientation description, such as the front, back, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
[0032] In the description of the present utility model, the meaning of "a plurality of" is more than two. Understanding "greater than", "less than", "exceeding", etc. does not include the number itself, and understanding "above", "below", "within", etc. includes the number itself. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0033] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.
[0034] The following further elaborates on the embodiments of the present utility model with reference to the accompanying drawings.
[0035] According to some embodiments of the present utility model, referring to Figures 1 to 3 , the mechanical expansion shaft includes an end cover 100, an inner shaft 200, an outer sleeve 300, swing rods 400, and a driving component 410. The inner shaft 200 and the outer sleeve 300 are coaxially arranged with the axial direction being the front-back direction, and the inner shaft 200 passes through and is rotatably connected to the end cover 100. The outer sleeve 300 is sleeved on the inner shaft 200, and the outer sleeve 300 includes a plurality of support plates 310 distributed circumferentially along the inner shaft 200. The swing rods 400 are located between the inner shaft 200 and the outer sleeve 300, and the plurality of swing rods 400 correspond one-to-one to the plurality of support plates 310. One end of the swing rod 400 is rotatably connected to the support plate 310, and the other end of the swing rod 400 is rotatably connected to the inner shaft 200. The driving component 410 can drive the outer sleeve 300 to move in the front-back direction, so that the plurality of support plates 310 move in the front-back direction relative to the inner shaft 200, and drive the swing rods 400 to rotate relative to the inner shaft 200, thereby increasing or decreasing the outer diameter of the outer sleeve 300.
[0036] It can be understood that on the projection plane perpendicular to the axis of the inner shaft 200, the projection of the support plate 310 is arc-shaped, and the projections of the plurality of support plates 310 are located on the same circle, and the diameter of this circle is the outer diameter of the outer sleeve 300. When the plurality of support plates 310 swing back and forth relative to the inner shaft 200, the outer diameter of the outer sleeve 300 increases or decreases.
[0037] When it is necessary to wind the film, the driving component 410 drives the support plate 310 to swing relative to the inner shaft 200 to move away from the inner shaft 200, so that the outer diameter of the outer sleeve 300 increases. After the film is wound on the outer sleeve 300 with an increased outer diameter, the driving component 410 drives the support plate 310 to swing relative to the inner shaft 200 to move closer to the inner shaft 200, so that the outer diameter of the outer sleeve 300 decreases. At this time, the inner side of the wound film is separated from the outer side of the outer sleeve 300, and the outer sleeve 300 can move away from the wound film in the front-back direction, so that the wound film can be unwound from the inner circle in the next process.
[0038] After using this mechanical expansion shaft to wind the film, it can be easily separated from the wound film. At the same time, the inner core required for the wound film finished product is eliminated, which saves costs, and it is convenient for the wound film to be unwound from the inner circle in subsequent production and processing to meet different wound film usage environments.
[0039] Preferably, referring to Figure 3, a plurality of ridges 201 are provided on the outer peripheral wall of the inner shaft 200. The ridges 201 extend in the front-rear direction. The plurality of ridges 201 correspond to the plurality of support plates 310 one by one. One end of the swing rod 400 is hinged to the ridge 201, and the other end of the swing rod 400 is connected to the support plate 310. The swing rod 400 includes a plurality of swing arms. The plurality of swing arms are arranged at intervals in the front-rear direction. Both ends of the swing arm are respectively hinged to the ridge 201 and the support plate 310. The plurality of swing arms can enhance the connection stability between the inner shaft 200 and the support plate 310.
[0040] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the inner shaft 200 includes a circular shaft 210 and a square shaft 220. The circular shaft 210 passes through and is fixedly connected to the square shaft 220. A plurality of ridges 201 are provided on the outer side wall of the square shaft 220. The inner shaft 200 further includes a fixed cylinder 230. The opening of the fixed cylinder 230 faces backward. An annular groove 240 is provided at the front end of the square shaft 220. The fixed cylinder 230 is inserted into the annular groove 240 and is in interference fit with the square shaft 220. The fixed cylinder 230 and the circular shaft 210 are fixedly connected by bolts, so that the square shaft 220 and the circular shaft 210 are relatively fixed, and the assembly method of the square shaft 220 and the circular shaft 210 is simple and fast.
[0041] According to some embodiments of the present invention, referring to Figure 2 , the driving component 410 includes a cylinder 411 and a return spring 412. The outer sleeve 300 is located on the front side of the end cover 100. The cylinder 411 is located on the front side of the outer sleeve 300. The front end of the return spring 412 is connected to the outer sleeve 300, and the rear end of the return spring 412 is connected to the end cover 100.
[0042] When the cylinder 411 abuts against and pushes the outer sleeve 300 backward, so that the support plate 310 swings away from the inner shaft 200, the outer diameter of the outer sleeve 300 increases, and the outer sleeve 300 moves backward to compress the return spring 412.
[0043] When the cylinder 411 moves away from the outer sleeve 300, the return spring 412 pushes the outer sleeve 300 forward, so that the support plate 310 swings close to the inner shaft 200, and the outer diameter of the outer sleeve 300 decreases.
[0044] According to some embodiments of the present invention, referring to Figure 3, the outer sleeve 300 further includes a plurality of connecting rods 320. The plurality of connecting rods 320 correspond to the plurality of support plates 310 one by one. The connecting rods 320 extend in the front-rear direction. The connecting rods 320 are located between the support plates 310 and the inner shaft 200. The side of the connecting rod 320 away from the inner shaft 200 is attached to and fixedly connected to the support plate 310. One end of the swing rod 400 is hinged to the connecting rod 320, and the other end of the swing rod 400 is hinged to the rib 201. The connecting rod 320 can enhance the strength of the support plate 310, preventing the support plate 310 from being bent due to excessive force during the rolling process and affecting the final rolling quality.
[0045] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the mechanical expansion shaft further includes a top ring 420. The top ring 420 is slidably connected to the end cover 100 in the front-rear direction. The front end of the top ring 420 abuts against the outer sleeve 300. The front end of the return spring 412 is connected to the top ring 420, and the rear end of the return spring 412 is connected to the end cover 100. The return spring 412 acts on the top ring 420, and through the top ring 420, it acts on the plurality of support plates 310 of the outer sleeve 300, preventing the return spring 412 from being damaged under the swing of the support plate 310 when directly connected to the support plate 310.
[0046] Preferably, referring to Figure 2 and Figure 3 , the front end of the end cover 100 extends forward to form a convex column 110. The top ring 420 is sleeved on the convex column 110 such that the top ring 420 is slidably connected to the end cover 100.
[0047] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the front end of the support plate 310 is provided with a stop block 330. The stop block 330 is used to abut against the driving end of the cylinder 411. The stop block 330 can increase the force-bearing area between the driving end of the cylinder 411 and the support plate 310.
[0048] In the description of this specification, the description referring to the term "some embodiments" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above term does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. A mechanical expansion shaft, characterized in that, Comprising: An end cap (100); An inner shaft (200) which is inserted through and rotatably connected to the end cap (100); An outer sleeve (300) sleeved on the inner shaft (200), the outer sleeve (300) comprising a plurality of support plates (310) circumferentially distributed along the inner shaft (200); A swing rod (400) located between the inner shaft (200) and the outer sleeve (300), a plurality of the swing rods (400) corresponding one-to-one to the plurality of support plates (310), one end of the swing rod (400) being rotatably connected to the support plate (310), and the other end of the swing rod (400) being rotatably connected to the inner shaft (200); A driving component (410) capable of driving the plurality of support plates (310) to move along the axis relative to the inner shaft (200) and driving the swing rod (400) to rotate relative to the inner shaft (200) to increase or decrease the outer diameter of the outer sleeve (300).
2. The mechanical expansion shaft according to claim 1, wherein On a projection plane perpendicular to the axis of the inner shaft (200), the projection of the support plate (310) is arc-shaped, and the projections of the plurality of support plates (310) are located on the same circle.
3. The mechanical expansion shaft according to claim 1, characterized in that, A plurality of ridges (201) are provided on the outer peripheral wall of the inner shaft (200), the plurality of ridges (201) corresponding one-to-one to the plurality of support plates (310), and one end of the swing rod (400) being hinged to the ridge (201).
4. The mechanical expansion shaft according to claim 3, characterized in that, The inner shaft (200) comprises a circular shaft (210) and a square shaft (220), the circular shaft (210) being inserted through and fixedly connected to the square shaft (220), and a plurality of the ridges (201) being provided on the outer side wall of the square shaft (220).
5. The mechanical expansion shaft according to claim 4, wherein, The inner shaft (200) further comprises a fixing cylinder (230), an annular groove (240) being provided at one end of the square shaft (220), the fixing cylinder (230) being inserted into the annular groove (240), and the fixing cylinder (230) being fixedly connected to the circular shaft (210) by bolts.
6. The mechanical expansion shaft according to claim 1, wherein The driving component (410) comprises a cylinder (411) and a return spring (412), the outer sleeve (300) being located on the front side of the end cap (100), the cylinder (411) being located on the front side of the outer sleeve (300), the front end of the return spring (412) being connected to the outer sleeve (300), the rear end of the return spring (412) being connected to the end cap (100), the cylinder (411) being capable of pushing the outer sleeve (300) backward and causing the support plate (310) to swing away from the inner shaft (200) and causing the outer sleeve (300) to compress the return spring (412), and the return spring (412) having a biasing force that causes the support plate (310) to swing close to the inner shaft (200) when compressed.
7. The mechanical expansion shaft according to claim 1, wherein, The outer sleeve (300) further includes a plurality of connecting rods (320), and the plurality of connecting rods (320) correspond to the plurality of support plates (310) one by one. The connecting rods (320) are located between the support plates (310) and the inner shaft (200). One side of the connecting rod (320) away from the inner shaft (200) is attached to and fixedly connected with the support plate (310). One end of the swing rod (400) is hinged to the connecting rod (320).
8. The mechanical expansion shaft according to claim 6, wherein The mechanical expansion shaft further includes a top ring (420), the top ring (420) is slidably connected to the end cover (100), the front end of the top ring (420) abuts against the outer sleeve (300), and the front end of the return spring (412) is connected to the top ring (420).
9. The mechanical expansion shaft according to claim 8, wherein A convex column (110) extends forward from the front end of the end cover (100), and the top ring (420) is sleeved on the convex column (110).
10. The mechanical expansion shaft according to claim 6, characterized in that, A stop block (330) is provided at the front end of the support plate (310), and the stop block (330) is used to abut against the driving end of the air cylinder (411).