A graphite film calendering air expansion shaft

Abstract

The utility model discloses a kind of graphite film calendering air expansion shaft, including main shaft stem, expansion ear component, driving assembly and the roller sleeve set in the outside of main shaft stem. The expansion ear component includes setting in the static wedge block of main shaft stem outer periphery, slide wedge foot, expansion ear, linkage strip rod and top foot block, static wedge block is fixed along axial arrangement, slide wedge foot is slidably connected in the surface of static wedge block and with top foot block form sliding force transmission, expansion ear is set in the outside of top foot block for the radial tensioning of roller sleeve. The driving assembly includes air sleeve cylinder, linkage disc and air slide ring, air sleeve cylinder is connected in the surface of main shaft stem and moves along axial direction by filling and discharging driving linkage disc, and the outer periphery of linkage disc is equipped with several connecting feet. The gas pipe end of air sleeve cylinder is communicated with air slide ring, so that it keeps stable in rotating state Supply gas. The utility model compact structure, gas leakage risk is low, and tensioning stability is high, with self-locking ability, suitable for high-stable support and traction of graphite film calendering equipment.

Description

Technical Field

[0001] This utility model relates to the field of air shaft technology, specifically a graphite film calendered air shaft. Background Technology

[0002] Graphite film calendering equipment is widely used in the fields of electronic materials and new energy. One of its key components is the air shaft, which is used to fix and transmit the calendering traction force. In existing technologies, the air shaft usually completes the expansion action through air pipes, air bladders, or air expansion guides set inside the main shaft, so that the outer sleeve and the graphite film surface can form effective friction. However, traditional air expansion structures generally suffer from problems such as long air paths, many sealing points, and a high probability of leakage. In calendering equipment with high rotation speed or high cycle frequency, a drop in gas pressure may lead to insufficient expansion, affecting traction stability and film thickness uniformity.

[0003] In existing technologies, typical structures often employ a single-path air supply method with end-inlet air. These typically involve long air pipes and multiple sealing interfaces, making them prone to minor leaks during high-speed spindle rotation. Over time, the seals wear out more rapidly, gradually reducing system reliability. Furthermore, when gas leaks, the traditional expansion mechanism relies heavily on air pressure and lacks mechanical self-locking capability. Even short-term air pressure fluctuations can cause the expansion block to retract, leading to loosening of the roller sleeve, equipment downtime, or product quality fluctuations.

[0004] On the other hand, common tensioning mechanisms mostly adopt direct-push or sheet-like expansion block structures, which can form a certain tensioning effect under air pressure, but lack the force amplification and self-locking characteristics brought by wedge transmission. Once the pressure is lost, this type of structure cannot maintain a stable outward tension state, which poses a safety hazard. Moreover, in the high-load calendering process, problems such as insufficient tension and expansion block displacement are prone to occur, resulting in uneven calendering traction.

[0005] In view of this, we will study and improve upon the existing problems and provide a graphite film calendered gas expansion shaft to solve the current problems. Utility Model Content

[0006] This invention aims to solve the problems of high air leakage risk, lack of self-locking capability in the tensioning mechanism, and insufficient support stability during calendering in existing air shaft structures. It proposes a graphite film calendering air shaft with a more reliable structure, more stable air path, and self-locking effect. Through the coordinated design of the main shaft, lug assembly, and drive assembly, this invention enables the shaft to maintain a stable tensioned state even under high-speed rotation and high-load calendering conditions, significantly improving the operational reliability and processing consistency of graphite film calendering equipment.

[0007] This utility model provides a graphite film calendering air expansion shaft, including a main shaft, an expansion lug assembly, a drive assembly, and a roller assembly sleeved on the surface of the main shaft.

[0008] The lug assembly is located on the outer periphery of the main shaft and is centrally controlled by the drive assembly. Radial tensioning of the lug is achieved through a wedge mechanism, thus providing stable frictional support to the roller assembly. The drive assembly employs an annular air sleeve cylinder and air slip ring structure, ensuring continuous air supply throughout the entire air circuit during rotation, reducing the risk of gas leakage.

[0009] This overall structure gives the air shaft a comprehensive set of technical advantages, including a compact structure, stable air path, uniform tension, and self-locking capability.

[0010] The following content elaborates on the key technical points strictly in the order of claims 1 to 7: In a preferred embodiment, the air shaft of this invention includes a main shaft, an expansion lug assembly, and a drive assembly, with the roller assembly sleeved onto the surface of the main shaft. The expansion lug assembly includes an expansion lug, a connecting rod, a stationary wedge block, a sliding wedge foot, and a top foot block. In its structure, the stationary wedge blocks are linearly arranged and fixed to the surface of the main shaft, and the sliding wedge foot is slidably sleeved onto the surface of the stationary wedge block and forms a sliding contact with the top foot block. The drive assembly includes an air-jacketed cylinder, a connecting disc, and an air slip ring. The air-jacketed cylinder drives the connecting disc to move axially, and the connecting foot on the connecting disc sequentially drives the connecting lug and the connecting rod, causing the sliding foot to slide along the inclined plane and push the expansion lug to tighten.

[0011] Specifically, a stable tension is achieved through an axial-radial force conversion mechanism, which provides uniform support to the roller assembly.

[0012] In a preferred example, the lug assemblies can be configured as several groups and evenly distributed around the outer periphery of the spindle in the circumferential direction, and the surface of the spindle is provided with grooves for radial sliding between the lugs and the top feet.

[0013] Specifically, the tensioning process is balanced to avoid excessive local tension that could lead to uneven wear of the rollers.

[0014] In a preferred example, the lug adopts an arc-shaped strip structure with toothed edges on its outer surface to improve frictional contact with the inner wall of the roller assembly.

[0015] Specifically, it improves the traction stability of graphite films during calendering and prevents film slippage.

[0016] In a preferred example, the surface of the sliding foot is provided with a sliding pin, and the top foot block is provided with a sliding sleeve hole for engaging the sliding pin, so that it moves only in the radial direction under the lateral guidance of the stationary wedge block.

[0017] Specifically, this makes the guide of the top foot block more stable and prevents it from shifting non-radial.

[0018] In a preferred example, the surface of the stationary wedge block is inclined and has an inclined guide rail arranged in an oblique direction. The sliding foot is sleeved on the inclined guide rail and slides against the end face of the top foot block, thereby forming a stable inclined wedge pushing action.

[0019] Specifically, it forms a self-locking effect under tension, allowing the lugs to remain stably outward-expanding even when air pressure fluctuates.

[0020] In a preferred example, the air-jacketed cylinder consists of an annular piston cylinder and an annular piston, and is fixedly sleeved on the surface of the main shaft, used to drive the linkage disc to achieve axial movement through the air filling and defilling action.

[0021] Specifically, it can achieve higher airtightness and more stable driving force, thereby reducing the risk of gas leakage.

[0022] In a preferred example, the air pipe end of the air sleeve cylinder is connected to the air slip ring and connected to the external air circuit through the air slip ring, so that the air sleeve cylinder can continue to supply air when the main shaft and the air slip ring rotate relative to each other.

[0023] Specifically, it enables the tensioning and loosening actions to be performed stably even in a rotating state, thereby improving the continuous operation capability of the equipment.

[0024] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, an annular air-driven structure composed of an air-jacket cylinder is adopted, and a continuous and stable air supply is achieved through an air slip ring. Compared with the traditional single-pipe air-driven structure, the gas transmission path is shorter and there are fewer sealing interfaces, which can significantly reduce the risk of gas leakage, improve the airtightness stability of the air shaft under high-speed rotation conditions, and extend the service life of key components.

[0025] 2. In this utility model, a sloped wedge push mechanism is formed by a stationary wedge block and a sliding wedge foot. The inclined geometry of the inclined guide rail has a natural self-locking characteristic, which allows the sliding wedge foot to maintain a stable wedge tightness even when the air pressure fluctuates or the air supply stops after tensioning. This avoids the unexpected retraction of the expansion ear, improves the reliability of tensioning and positioning, and ensures that the roller assembly continuously obtains uniform and stable circumferential support force during the calendering process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a partial cross-sectional structural diagram of one embodiment of the present invention; Figure 3 This is a schematic diagram of the expansion lug assembly and driving assembly according to an embodiment of the present invention; Figure 4 This is an exploded view of the expansion lug assembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the drive component structure according to an embodiment of the present invention.

[0027] Figure label: 100. Main shaft; 110. Roller assembly; 200, Expansion lug assembly; 210, Expansion lug; 220, Connecting rod; 230, Stationary wedge block; 240, Sliding wedge foot; 211, Top foot block; 221, Connecting lug; 300. Drive assembly; 310. Pneumatic cylinder; 320. Connecting disc; 330. Pneumatic slip ring; 321. Connecting foot. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0029] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0030] The graphite film calendering air shaft provided by some embodiments of this utility model is described below with reference to the accompanying drawings.

[0031] Combination Figures 1-5 As shown, the present invention provides a graphite film calendering air expansion shaft, including a main shaft 100, an expansion lug assembly 200, a drive assembly 300, and a roller assembly 110 sleeved on the surface of the main shaft 100.

[0032] The expansion lug assembly 200 includes expansion lug 210, connecting bar 220, stationary wedge block 230, sliding wedge foot 240, top foot block 211, connecting lug 221 and other components. The stationary wedge block 230 is arranged in a straight line and fixed on the surface of the main shaft 100. The stationary wedge block 230 is arranged in a straight line along the axial direction of the main shaft 100 and serves as the fixed inclined surface of the sliding wedge mechanism.

[0033] The sliding wedge foot 240 is slidably sleeved on the surface of the stationary wedge block 230. The inclined surface of the sliding wedge foot 240 and the stationary wedge block 230 forms a sliding sleeve relationship with the inclined guide rail, and can move along the inclined surface under the drive of the connecting rod 220. The surface of the expansion lug 210 is provided with a top foot block 211 that slides against the sliding wedge foot 240. The top foot block 211 is fixed inside the expansion lug 210, and its bottom forms a sliding abutment relationship with the sliding wedge foot 240, so that the axial pushing action of the sliding wedge foot 240 is converted into the radial tension of the expansion lug 210. The end of the connecting rod 220 is rotatably connected to the connecting lug 221, and the connecting lug 221 is rotatably connected to the connecting foot 321 on the surface of the connecting plate 320, thereby realizing the synchronous operation of multiple sets of expansion lug assemblies 200.

[0034] The drive assembly 300 includes a pneumatic sleeve cylinder 310, a connecting plate 320, and a pneumatic slip ring 330. The pneumatic sleeve cylinder 310 is sleeved on the surface of the main shaft 100 and has an internal annular piston structure. The pneumatic sleeve cylinder 310 drives the connecting plate 320 to generate axial movement, thereby uniformly adjusting the working state of all the lug assemblies 200. The connecting plate 320 has connecting feet 321 on its outer periphery, which are rotatably connected to each lug 221. The pneumatic slip ring 330 is connected to an external control air circuit and maintains internal communication with the pneumatic sleeve cylinder 310, so that the main shaft 100 can continue to be supplied with air during rotation.

[0035] Combination Figure 2 and Figure 4 As shown, there are multiple expansion lug assemblies 200, which are evenly distributed along the circumference of the main shaft 100. This uniform distribution structure enables the expansion lugs 210 to apply uniform circumferential support to the roller assembly 110 during tensioning, thereby improving the stability of the graphite film calendering process.

[0036] In this embodiment, the outer peripheral surface of the main shaft 100 is provided with multiple grooves to accommodate the radial sliding of the expansion lug 210 and the top foot block 211, ensuring the guiding accuracy and stroke stability during the tensioning process.

[0037] In this embodiment, the expansion lug 210 adopts an arc-shaped strip structure, which forms a surface fit with the inner wall of the roller assembly 110, thereby achieving a higher contact area after tensioning.

[0038] In this embodiment, the surface of the lug 210 is provided with multiple toothed ridges, which are used to increase the coefficient of friction during the graphite film calendering process, so that the roller assembly 110 can more stably pull the graphite film when rotating at high speed.

[0039] In this embodiment, each sliding wedge foot 240 is provided with a sliding pin on its surface, which is used to form a guiding engagement with the sliding sleeve hole of the top foot block 211.

[0040] The surface of the top foot block 211 is provided with a sliding sleeve hole corresponding to the sliding pin. Under the lateral guidance of the stationary wedge block 230, the sliding wedge foot 240 can slide along the inclined guide rail, so that the top foot block 211 only moves radially and does not produce relative axial displacement, thus ensuring the stability of the expansion lug 210 tensioning.

[0041] In this embodiment, the surface of the stationary wedge block 230 has an inclined surface and an axially arranged inclined guide rail. The inclined guide rail is used to restrict the sliding wedge foot 240 from sliding along a predetermined path, so that the sliding wedge foot 240 can achieve stable oblique movement under the action of the linkage bar 220, and convert its axial component force into radial thrust, pushing the top foot block 211 to tighten the expansion lug 210.

[0042] In this embodiment, the air-jacketed cylinder 310 consists of an annular piston cylinder and an annular piston, which are integrally fitted onto the surface of the main shaft 100. By inflating or deflating the air-jacketed cylinder 310, the piston moves axially within the cavity, pushing the connecting plate 320 to move as a whole, thereby achieving synchronous tightening and loosening of the expansion lug assembly 200.

[0043] In this embodiment, the air pipe end of the air sleeve cylinder 310 is connected to the inside of the air slip ring 330, and the air passage interface on the outside of the air slip ring 330 can be connected to an external control air passage.

[0044] The air slip ring 330 is used to maintain a continuous air circuit connection when the main shaft 100 and the air sleeve cylinder 310 rotate, so that the air sleeve cylinder 310 can receive a stable air source in the rotating state, and ensure that the tensioning and loosening of the expansion lug 210 is controllable.

[0045] Working principle and usage process of this utility model: This invention relates to a graphite film calendering air-expanding shaft. A pneumatic cylinder 310 drives a connecting disc 320 to move axially. The connecting disc 320, in turn, drives multiple sets of connecting lugs 221 and connecting rods 220 through connecting feet 321 to achieve synchronous linkage, thereby realizing the coordinated tensioning or release of the stationary wedge block 230, the sliding wedge foot 240, and the expansion lug 210. The overall structure utilizes the axial-radial force conversion relationship of the wedge mechanism to achieve rapid tensioning and stable, balanced support for the graphite film calendering roller assembly 110.

[0046] When compressed gas is introduced into the air-jacketed cylinder 310, the annular piston moves outward, causing the connecting disc 320 to move along the axial direction of the main shaft 100.

[0047] In the deflated state, the piston is driven back by the restoring force, causing the connecting plate 320 to move in the opposite direction, completing the reciprocating motion of the tightening and loosening process.

[0048] The surface of the connecting plate 320 is provided with several connecting feet 321, each of which is rotatably connected to the connecting lug 221. The connecting lug 221 is fixed to the end of the connecting bar 220, so the axial movement of the connecting plate 320 can cause all the connecting bars 220 to generate a consistent axial force synchronously.

[0049] The stationary wedge block 230 is fixed to the outer periphery of the main shaft 100 and has an axially arranged inclined guide rail structure; the sliding wedge foot 240 is sleeved on the inclined guide rail on the surface of the stationary wedge block 230 and slides along the inclined surface under the action of the linkage rod 220. When the sliding wedge foot 240 slides along the inclined surface, it converts the axial force in the direction of the inclined surface into a radially outward pushing force, thereby pushing the push foot block 211 to move radially outward.

[0050] The top foot block 211 slides against the bottom surface of the expansion lug 210, so the radial movement of the top foot block 211 will push the expansion lug 210 outward as a whole. Multiple sets of expansion lugs 210 are evenly distributed circumferentially, making the tension force more uniform on the inner wall of the roller assembly 110, improving the support stability and frictional traction of the film during graphite film calendering. The air slip ring 330 and the air sleeve cylinder 310 maintain a continuous air passage connection, ensuring that the air sleeve cylinder 310 can stably receive the control air source even when the main shaft 100 rotates, realizing real-time controllability of tensioning and releasing.

[0051] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A graphite film calendered gas-expanding shaft, characterized in that, The assembly includes a main shaft (100), an expansion lug assembly (200), and a drive assembly (300), as well as a roller assembly (110) fitted onto the surface of the main shaft (100). The expansion lug assembly (200) includes an expansion lug (210), a connecting rod (220), a stationary wedge (230), and a sliding wedge foot (240) fixed to the surface of the connecting rod (220). The stationary wedge (230) is arranged linearly along the surface of the main shaft (100) and fixedly connected. The sliding wedge foot (240) is slidably fitted onto the surface of the stationary wedge (230). The surface of the expansion lug (210) is provided with... There is a top foot block (211) that slides against the surface of the sliding wedge foot (240); the drive assembly (300) includes a pneumatic sleeve cylinder (310), a connecting disc (320) and a pneumatic slip ring (330) sleeved on the surface of the main shaft (100); the pneumatic sleeve cylinder (310) is used to drive the connecting disc (320) to move axially; the surface of the connecting disc (320) is provided with a plurality of connecting feet (321), and the end of each connecting bar (220) is rotatably connected to a connecting lug (221), and each connecting lug (221) is rotatably connected to the surface of the connecting foot (321).

2. The graphite film calendered gas-expanding shaft according to claim 1, characterized in that: The number of the expansion lug assemblies (200) is several and they are evenly distributed around the outer periphery of the main shaft (100) along the circumferential direction; the surface of the main shaft (100) is provided with a groove for accommodating the radial sliding of the expansion lugs (210) and the top foot block (211).

3. The graphite film calendered gas-expanding shaft according to claim 1, characterized in that: The expansion lug (210) is an arc-shaped strip structure, and its surface is provided with several toothed edges to improve the contact friction with the graphite film surface.

4. The graphite film calendered gas-expanding shaft according to claim 1, characterized in that: Each of the sliding wedge feet (240) is provided with a sliding pin, and the top foot block (211) is provided with a sliding sleeve hole that fits onto the surface of the sliding pin, so that the top foot block (211) is pushed to achieve radial movement during the lateral drive of the stationary wedge block (230).

5. The graphite film calendered gas-expanding shaft according to claim 1, characterized in that: The surface of the stationary wedge block (230) is inclined and has an inclined guide rail arranged in an oblique direction; the sliding wedge foot (240) is slidably sleeved on the surface of the inclined guide rail, and one side is in sliding contact with the end face of the top foot block (211).

6. The graphite film calendered gas-expanding shaft according to claim 1, characterized in that: The gas sleeve cylinder (310) includes an annular piston cylinder and an annular piston structure, and is fixedly sleeved on the surface of the main shaft (100) for driving the connecting plate (320) to move axially by filling and releasing air.

7. The graphite film calendered gas-expanding shaft according to claim 1, characterized in that: The air pipe end of the air sleeve cylinder (310) is connected to the surface of the air slip ring (330); the air slip ring (330) is connected to an external control air circuit, which is used to realize the continuous and stable air circuit connection of the air sleeve cylinder (310) during the rotation of the main shaft (100) and the air sleeve cylinder (310).

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