A high efficiency small wheel stretching device

Abstract

The utility model discloses a kind of efficient small wheel stretching device, including two left and right parallelly arranged stretching drive frame, the front end of two described stretching drive frame is equipped with stretching large wheel, the rear side between two described stretching drive frame is equipped with stretching small wheel a and stretching small wheel b in both ends;The stretching drive frame includes the support arm a and support arm b of up and down opening and closing arrangement, the front end of described support arm a and support arm b is equipped with large wheel axle seat, the rear end of described support arm a and support arm b is equipped with small wheel axle seat, this structure can increase the contact area and stretching stroke of material and stretching wheel, effectively promote stretching efficiency.Meanwhile, the collocation setting of stretching large wheel and stretching small wheel, according to the stretching demand of different materials, flexibly adjust the winding mode and stretching strength of material, adapt to the stretching processing of multiple materials, reduce the equipment replacement frequency, significantly improve the versatility and production efficiency of equipment.

Description

Technical Field

[0001] This utility model relates to the field of small wheel stretching technology, specifically a high-efficiency small wheel stretching device. Background Technology

[0002] In many industrial sectors such as metal processing, textile printing and dyeing, and plastic film production, material stretching is a crucial process. Its purpose is to use external force to bring materials to the required length, thickness, or physical properties to meet the requirements of subsequent production and processing. Currently, there are many types of stretching devices on the market, but in practical applications, they generally suffer from several unresolved problems that seriously affect production efficiency and product quality. Most existing stretching devices use a single stretching wheel structure, or although they have multiple stretching wheels, the positions of these wheels are fixed, making it impossible to flexibly and precisely adjust them according to the characteristics of different materials and actual stretching requirements. For example, in metal wire stretching, the required stretching force and stretching path vary significantly for metal wires of different diameters and materials. Fixed-structure stretching devices are difficult to adapt to diverse processing needs, often requiring the replacement of different equipment or complex disassembly and reassembly of existing equipment. This not only increases the labor intensity of operators but also significantly extends production preparation time and reduces overall production efficiency. Therefore, improvements to existing technologies are necessary. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency small wheel tensioning device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency small wheel stretching device, comprising two stretching drive frames arranged horizontally and horizontally, with a large stretching wheel mounted at the front end of the two stretching drive frames, and small stretching wheels a and b mounted at the upper and lower ends of the rear side between the two stretching drive frames; each stretching drive frame includes a support arm a and a support arm b that open and close vertically, with a large wheel axle seat mounted at the front end of the support arm a and support arm b, and a small wheel axle seat mounted at the rear end of the support arm a and support arm b; an adjusting cylinder a and an adjusting cylinder b are installed between the two small wheel axle seats, and an adjusting mechanism is installed inside the adjusting cylinder a and adjusting cylinder b; a swing cavity is formed on the rear side wall of the large wheel axle seat, and a swing rod is mounted at the front end of each support arm a and support arm b, the swing rod being hinged within the swing cavity.

[0005] As a preferred embodiment of the efficient small wheel tensioning device of this utility model, the adjusting mechanism includes an adjusting screw installed in the adjusting cylinder a and an adjusting screw cylinder installed in the adjusting cylinder b. The adjusting screw is screwed into the adjusting screw cylinder. A shaft seat is installed at the top of the inner part of the adjusting cylinder a, and the top of the adjusting screw is installed in the shaft seat.

[0006] As a preferred embodiment of the efficient small wheel tensioning device of this utility model, a fixed seat is installed at the bottom end of the adjusting screw, the fixed seat is installed inside the adjusting cylinder b, and a support spring is fitted on the outside of the adjusting screw and the adjusting screw between the shaft seat and the fixed seat.

[0007] As a preferred embodiment of the efficient small wheel tensioning device of this utility model, the bearing seat includes a shaft cylinder a and a shaft cylinder b arranged opposite to each other. Rotating cavities are evenly and equidistantly opened on the inner walls of the shaft cylinder a and shaft cylinder b along their axis. Ball bearings are installed inside the rotating cavities and are fitted against the outer wall of the adjusting screw.

[0008] As a preferred embodiment of the efficient small wheel tensioning device of this utility model, connecting plates are installed on both side walls of the shaft cylinder a and shaft cylinder b, and threaded holes are opened on the side walls of the connecting plates. Bolts are screwed into the inside of the threaded holes, and bearing plates are installed on the rear side walls of the shaft cylinder a and shaft cylinder b.

[0009] As a preferred embodiment of the efficient small wheel stretching device of this utility model, a drive hole a is provided at the center of the large wheel axle seat, a large wheel axle is installed in the drive hole a, the stretching large wheel is installed outside the large wheel axle, and a U-shaped frame is installed at the bottom end of the large wheel axle seat.

[0010] As a preferred embodiment of the efficient small wheel stretching device of this utility model, a drive hole b is provided at the center of the small wheel axle seat, and small wheel axle a and small wheel axle b are respectively installed inside the two drive holes b. The stretching small wheel a is installed outside the small wheel axle a, and the stretching small wheel b is installed outside the small wheel axle b.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the setting of this efficient small wheel tensioning device has a reasonable structural design; This high-efficiency small-wheel stretching device innovatively adopts a multi-wheel combination structure of "one large stretching wheel + two small stretching wheels (stretching wheel a and stretching wheel b)," with two stretching drive frames arranged parallel to each other to form a reasonable stretching path. Compared with existing single or fixed multi-wheel structures, this structure can increase the contact area between the material and the stretching wheels and the stretching stroke, effectively improving stretching efficiency. Simultaneously, the combination of the large and small stretching wheels allows for flexible adjustment of the material winding method and stretching force according to the stretching requirements of different materials (such as metal wires, films, and fibers), adapting to the stretching processing of various materials, reducing equipment change frequency, and significantly improving the equipment's versatility and production efficiency. Attached Figure Description

[0012] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention; Figure 2This is a schematic diagram of the tension drive frame of this utility model; Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model; Figure 4 This is a schematic diagram of the bearing seat of this utility model.

[0013] In the diagram: 1. Large tension wheel; 2. Tension drive frame; 3. Small wheel axle; 4. Small tension wheel a; 5. Small tension wheel b; 6. Lower wheel axle b; 7. U-shaped frame; 8. Large wheel axle; 9. Large wheel axle seat; 10. Support arm a; 11. Drive hole b; 12. Adjusting cylinder a; 13. Adjusting cylinder b; 14. Small wheel axle seat; 15. Support arm b; 16. Swing cavity; 17. Swing rod; 18. Drive hole a; 19. Support spring; 20. Fixed seat; 21. Adjusting screw cylinder; 22. Adjusting screw; 23. Shaft seat; 24. Shaft cylinder a; 25. Shaft cylinder b; 26. Bearing plate; 27. Screw hole; 28. Connecting plate; 29. ​​Bolt; 30. Ball bearing; 31. Rotating cavity. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-4 This utility model provides a technical solution: In this technical solution, a high-efficiency small wheel stretching device includes two stretching drive frames 2 arranged horizontally and horizontally. A large stretching wheel 1 is assembled at the front end of the two stretching drive frames 2, and small stretching wheels a4 and b5 are assembled at the upper and lower ends of the rear side between the two stretching drive frames 2. The stretching drive frame 2 includes a support arm a10 and a support arm b15 that are arranged vertically and horizontally. A large wheel axle seat 9 is installed at the front end of the support arm a10 and the support arm b15, and a small wheel axle seat 14 is installed at the rear end of the support arm a10 and the support arm b15. An adjusting cylinder a12 and an adjusting cylinder b13 are installed between the two small wheel axle seats 14. An adjusting mechanism is assembled inside the adjusting cylinder a12 and the adjusting cylinder b13. A swing cavity 16 is opened on the rear side wall of the large wheel axle seat 9, and a swing rod 17 is installed at the front end of the support arm a10 and the support arm b15. The swing rod 17 is hinged in the swing cavity 16.

[0016] In this technical solution, two parallel stretching drive frames 2 constitute the core support frame of the device. Their parallelism directly determines the coaxiality and force balance of the stretching wheel assembly (stretching large wheel 1, stretching small wheel a4, and stretching small wheel b5). The parallel design ensures that the material always moves along the preset path during the stretching process, avoiding material deviation and uneven stretching due to frame offset. It is especially suitable for continuous stretching operations of easily deformable materials such as metal wires and films. The layout of the single stretching large wheel 1 at the front and the double stretching small wheels (a4 and b5) on the rear side forms a "front guide and rear pull" composite stretching structure. The diameter of the large stretching wheel 1 is typically larger than that of the small wheel, which reduces the force per unit area of ​​the material through a larger contact area, preventing material breakage in the initial stage. The two small wheels on the rear side are symmetrically arranged vertically, enabling bidirectional clamping and stretching of the material, improving stretching accuracy and efficiency, and adapting to materials of different thicknesses—for thicker materials, the spacing between the two small wheels can be increased to achieve stable stretching, while for thinner materials, the spacing can be reduced to enhance clamping force. The vertical opening and closing design of the support arms a10 and b15, combined with the hinged structure of the front swing rod 17 within the swing cavity 16, forms a dual degree of freedom of adjustment: "rotatable + openable". When the adjustment mechanism drives the support arm to open or close, the swing rod 17 can rotate around the hinge point within the swing cavity 16, ensuring that the support arm always moves along the preset trajectory and avoiding structural jamming; at the same time, the spatial design of the swing cavity 16 provides a swing margin for the support arm, which can buffer the impact of material tension fluctuations on the support arm during stretching and improve the operational stability of the device.

[0017] In some technical solutions, the adjustment mechanism includes an adjustment screw 22 installed in the adjustment cylinder a12 and an adjustment screw cylinder 21 installed in the adjustment cylinder b13. The adjustment screw 22 is screwed into the adjustment screw cylinder 21. A bearing seat 23 is installed at the top of the inner part of the adjustment cylinder a12, and the top of the adjustment screw 22 is installed in the bearing seat 23.

[0018] In this technical solution, the adjusting screw 22 and the screw barrel 21 are fitted with precision threads (such as trapezoidal threads). The thread profile design has a self-locking function, which can prevent the threads from loosening due to vibration after adjustment and ensure the stability of the distance between the two pinions. At the same time, the thread accuracy grade (such as 6H / 6g) is high, which can achieve fine adjustment at the 0.01mm level, meeting the high-precision stretching requirements (such as stretching ultra-fine metal wires for electronic components). The bearing seat 23 is fixed to the top of the adjusting barrel a12, forming axial positioning and radial guidance for the adjusting screw 22. Its internal bearing structure (which will be described in detail in the subsequent solution) can reduce the frictional resistance when the screw rotates, making it easier for the operator to drive the screw manually or by motor. At the same time, the bearing seat restricts the radial offset of the screw, ensuring that the screw always moves along the axis of the adjusting barrel, avoiding thread wear or jamming at the screw joint due to eccentricity, and improving the durability of the adjusting mechanism.

[0019] In some technical solutions, a fixed seat 20 is installed at the bottom of the adjusting screw 21. The fixed seat 20 is installed inside the adjusting cylinder b13. A support spring 19 is fitted between the adjusting screw 22 and the outside of the adjusting screw 21, located between the shaft seat 23 and the fixed seat 20.

[0020] In this technical solution, the fixing seat 20 adopts a flange structure and is fixed to the inner wall of the adjusting cylinder b13 by bolts (not marked). On the one hand, it provides axial positioning for the adjusting screw cylinder 21, ensuring that the screw cylinder is always coaxial with the adjusting cylinder b13; on the other hand, the top of the fixing seat is provided with an annular groove (adapted to the outer diameter of the spring), which can limit the bottom end of the supporting spring 19 to prevent lateral displacement when the spring is compressed or stretched, and ensure that the spring is subjected to uniform force.

[0021] In some technical solutions, the bearing seat 23 includes a shaft cylinder a24 and a shaft cylinder b25 arranged opposite to each other. Rotating cavities 31 are evenly and equidistantly opened on the inner walls of the shaft cylinder a24 and the shaft cylinder b25 along their axis. Ball bearings 30 are installed inside the rotating cavities 31 and are fitted to the outer wall of the adjusting screw 22.

[0022] In this technical solution, the shaft cylinders a24 and b25 adopt a symmetrical split design, which can be spliced ​​together to wrap the adjusting screw 22. Compared with the integral shaft cylinder, it is easier to install and maintain. When the ball bearings are worn and need to be replaced, the ball bearings can be removed by simply disassembling the two shaft cylinders without disassembling the entire adjusting mechanism, which greatly reduces maintenance costs and downtime.

[0023] In some technical solutions, connecting plates 28 are installed on both side walls of shaft cylinder a24 and shaft cylinder b25. The side walls of the connecting plates 28 are provided with screw holes 27, and bolts 29 are screwed into the inside of the screw holes 27. Bearing plates 26 are installed on the rear side walls of shaft cylinder a24 and shaft cylinder b25.

[0024] In this technical solution, each shaft cylinder has one connecting plate 28 on each side (4 plates in total). The connecting plates are made of stamped steel plates and are integrally welded (or bolted) to the shaft cylinder, providing high strength. The screw hole 27 adopts a countersunk head design, and after the bolt 29 is tightened, the head is embedded in the connecting plate, avoiding interference between the protruding part and the inner wall of the adjusting cylinder. The bolts are high-strength bolts (such as grade 8.8) to ensure that there is no loosening after the shaft cylinders a24 and b25 are spliced, forming a complete ring support structure and ensuring the guiding accuracy of the shaft seat to the screw.

[0025] In some technical solutions, a drive hole a18 is provided at the center of the large wheel axle seat 9, a large wheel axle 8 is installed in the drive hole a18, a tensioning large wheel 1 is installed on the outside of the large wheel axle 8, and a U-shaped frame 7 is installed at the bottom of the large wheel axle seat 9.

[0026] In this technical solution, the drive hole a18 is precision bored, with the hole diameter tolerance controlled at level H7, forming a transition fit with the large wheel shaft 8 (shaft diameter tolerance h6) to ensure no radial movement during the rotation of the large wheel shaft. Simultaneously, the inner wall of the drive hole has a bearing groove (not marked), housing a deep groove ball bearing (such as model 6205), which reduces the frictional resistance between the large wheel shaft and the shaft seat, making the rotation of the stretching wheel 1 smoother and reducing material wear caused by friction (such as scratches on the film surface). The stretching wheel 1 is fixed to the large wheel shaft 8 via a key connection (such as a flat key). The keyway is precision milled, with a clearance of less than 0.02mm, ensuring synchronous rotation of the large wheel and shaft and preventing slippage. Additionally, the large wheel has shoulders and locking nuts (not marked) at both ends for axial positioning, preventing axial displacement during rotation and ensuring the material remains in contact with the wheel surface center, thus improving stretching uniformity.

[0027] In some technical solutions, a drive hole b11 is provided at the center of the small wheel axle seat 14. Small wheel a3 and small wheel a6 are respectively installed inside the two drive holes b11. The tensioning small wheel a4 is installed outside the small wheel a3, and the tensioning small wheel b5 is installed outside the small wheel a6.

[0028] In this technical solution, two drive holes b11 are symmetrically opened at the upper and lower ends of the small wheel shaft seat 14. The hole diameter is designed according to the diameter of the small wheel shafts a3 and b6 (usually the two shafts have the same diameter to ensure that the speed of the two small wheels is synchronized). The inner wall of the drive hole also incorporates bearings (such as miniature deep groove ball bearings) to reduce the rotational resistance of the small wheel shaft, ensuring synchronous and smooth rotation of the two small wheels and preventing uneven material stretching due to speed differences. Small wheel shafts a3 and b6 adopt a hollow shaft structure (30% weight reduction compared to solid shafts), reducing rotational inertia while ensuring strength, making the small wheels start and stop more quickly, and adapting to dynamic adjustments in material stretching speed (such as production line speed switching). The stretching small wheels are made of aluminum alloy (such as 6061) with an anodized surface, which is lightweight and wear-resistant, reducing the load on the support arm from the overall weight of the wheel assembly and extending the service life of the support arm. The two ends of the small wheel shaft are equipped with elastic retaining rings (not marked), which are embedded in the retaining ring grooves of the drive hole of the shaft seat to prevent axial movement of the small wheel shaft. At the same time, the connection between the small wheel and the small wheel shaft is made of set screws (not marked), which tighten against the shaft surface to further fix the position of the small wheel and prevent the small wheel from slipping or shifting during the stretching process, ensuring the material stretching accuracy. In addition, the small wheel surface adopts an arc-shaped groove design (to adapt to the material cross-section), which can enhance the fit between the material and the wheel surface, improve the clamping force, and prevent the material from deviating.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-efficiency small-wheel stretching device comprising two left and right parallel stretching drive frames (2), characterized in that, The front end of the two tension drive frames (2) is equipped with a large tension wheel (1), and the upper and lower ends of the rear side between the two tension drive frames (2) are equipped with small tension wheels a (4) and small tension wheels b (5). The tension drive frame (2) includes a support arm a (10) and a support arm b (15) that open and close vertically. A large wheel axle seat (9) is installed at the front end of the support arm a (10) and the support arm b (15). A small wheel axle seat (14) is installed at the rear end of the support arm a (10) and the support arm b (15). An adjusting cylinder a (12) and an adjusting cylinder b (13) are installed between the two small wheel axle seats (14). An adjusting mechanism is installed inside the adjusting cylinder a (12) and the adjusting cylinder b (13). A swing cavity (16) is opened on the rear side wall of the large wheel axle seat (9). A swing rod (17) is installed at the front end of the support arm a (10) and the support arm b (15). The swing rod (17) is hinged in the swing cavity (16).

2. A high efficiency small wheel stretching device according to claim 1, wherein, The adjustment mechanism includes an adjustment screw (22) installed in the adjustment cylinder a (12) and an adjustment cylinder (21) installed in the adjustment cylinder b (13). The adjustment screw (22) is screwed into the adjustment cylinder (21). A bearing seat (23) is installed at the top of the interior of the adjustment cylinder a (12), and the top of the adjustment screw (22) is installed in the bearing seat (23).

3. A high efficiency small wheel stretching device according to claim 2, wherein, The bottom end of the adjusting screw (21) is equipped with a fixed seat (20), which is installed inside the adjusting cylinder b (13). The adjusting screw (22) and the outside of the adjusting screw (21) are fitted with a support spring (19) between the shaft seat (23) and the fixed seat (20).

4. A high efficiency small wheel stretching device as claimed in claim 2, wherein, The bearing seat (23) includes a shaft cylinder a (24) and a shaft cylinder b (25) arranged opposite to each other. Rotating cavities (31) are evenly spaced along the axis of the inner walls of the shaft cylinder a (24) and the shaft cylinder b (25). Ball bearings (30) are installed inside the rotating cavities (31). The ball bearings (30) are fitted to the outer wall of the adjusting screw (22).

5. A high efficiency small wheel stretching device as claimed in claim 4, wherein, Connecting plates (28) are installed on both sides of the shaft cylinder a (24) and shaft cylinder b (25). The side walls of the connecting plates (28) are provided with screw holes (27). Bolts (29) are screwed into the screw holes (27). Bearing plates (26) are installed on the rear side walls of the shaft cylinder a (24) and shaft cylinder b (25).

6. A high efficiency small wheel stretching device as claimed in claim 1 wherein, A drive hole a (18) is provided at the center of the large wheel axle seat (9), a large wheel axle (8) is installed in the drive hole a (18), the tension wheel (1) is installed outside the large wheel axle (8), and a U-shaped frame (7) is installed at the bottom of the large wheel axle seat (9).

7. A high efficiency small wheel stretching device as claimed in claim 1 wherein, A drive hole b (11) is provided at the center of the small wheel axle seat (14). Small wheel axle a (3) and small wheel axle b (6) are respectively installed inside the two drive holes b (11). The tensioning small wheel a (4) is installed outside the small wheel axle a (3), and the tensioning small wheel b (5) is installed outside the small wheel axle b (6).

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