A spool tensioning mechanism integrated on a fiber placement machine

Abstract

The present application relates to a kind of material roll tensioning mechanism integrated on filament placement machine, including manual drive unit, transmission unit and thrust unit, transmission unit includes guide screw connected with manual drive unit and first nut and second nut arranged on guide screw and under the action of driving force, first nut and second nut are in reverse synchronous motion, thrust unit includes first connecting piece and second connecting piece and support rod, two ends of first connecting piece are connected with first nut and support rod respectively, two ends of second connecting piece are connected with second nut and support rod respectively, first nut and second nut are in reverse synchronous motion under the action of driving force, support rod is driven to be opened or contracted state, realize tensioning or releasing material roll.The present application reduces electric control and gas control components, while also greatly saves the space without installing electric control and gas control components, not only reduce the weight of material roll gripper mechanism itself, but also can realize the quick replacement of material roll.

Description

Technical Field

[0001] This invention relates to the field of filament placement machine technology, and in particular to a filament roll tensioning mechanism integrated into a filament placement machine. Background Technology

[0002] Existing integrated automatic yarn laying machines mainly consist of a yarn bundle storage rack, a backing paper collection unit, a tension control mechanism, a yarn bundle guiding mechanism, a yarn feeding mechanism, a cutting mechanism, a pressing mechanism, rollers, and a heating mechanism. Their function is to collect the yarn bundles with backing paper from the yarn bundles, peel off the backing paper before feeding them into the tension control mechanism, ensuring that only the yarn bundles enter the tension control mechanism. The yarn bundles exiting the tension control mechanism enter the yarn bundle guiding mechanism, which guides yarn bundles from different directions to the yarn feeding mechanism at the head of the yarn laying machine. The yarn feeding mechanism is generally composed of a servo motor and cylinders, enabling independent feeding of each yarn bundle. The fed yarn bundles pass through the cutting and pressing mechanisms. When cutting is required, the pressing mechanism presses the yarn bundle before the cutting mechanism cuts it. If cutting is not required, the yarn bundles directly pass through the cutting and pressing mechanisms and enter the rollers.

[0003] Throughout the entire filament movement, especially during the processes of peeling backing paper, tension control, filament feeding, and rolling and laying, the filament roll unloading function is the starting control point for all of these functions. The speed and quality of the unloading function directly affect the filament movement and the magnitude of the filament tension. Therefore, the filament roll mechanism in the unloading function needs a reliable roll clamping function. Before changing materials, the inner hole of the roll must be loosened, and after changing materials, the roll must be clamped. Only after the roll is reliably clamped can the tension and speed of unloading be controlled by the tension control mechanism during filament feeding.

[0004] In order to ensure the reliability of clamping the filament roll, the existing technology generally adopts air shaft clamping or electromagnetic clamping. This requires the addition of more electrical or pneumatic control components, which makes the clamping mechanism for the filament roll require a large installation space and increases the weight of the entire mechanism, making it inconvenient to change the roll. Summary of the Invention

[0005] (1) Technical problems to be solved

[0006] This invention provides a coil tensioning mechanism integrated into a filament laying machine. It uses two nuts that move synchronously in opposite directions to drive a connecting plate and a push rod, which in turn moves the outer cover radially away from the guide screw, thus opening the inner hole of the coil to achieve coil tension. Conversely, it causes the outer cover to retract radially towards the guide screw, disengaging from the inner hole of the coil to achieve coil release. This facilitates coil replacement. The purely mechanical assembly structure eliminates the need for servo motors or cylinders, reducing manufacturing costs and installation space while also facilitating maintenance and disassembly.

[0007] (2) Technical solution

[0008] In a first aspect, embodiments of the present invention provide a coil tensioning mechanism integrated on a filament layup machine for tensioning and releasing the coil. The mechanism includes a manual drive unit for providing driving force; a transmission unit connected to the manual drive unit; and a thrust unit connected to the transmission unit and opened or closed under the driving force of the manual drive unit for tensioning or releasing the coil. The transmission unit includes a guide screw connected to the manual drive unit, and a first nut and a second nut disposed on the guide screw and moving synchronously in opposite directions under the driving force. The thrust unit includes a first connecting piece, a second connecting piece, and a support rod. The two ends of the first connecting piece are respectively connected to the first nut and the support rod, and the two ends of the second connecting piece are respectively connected to the second nut and the support rod. The first nut and the second nut move synchronously in opposite directions under the driving force, causing the support rod to open or close, for tensioning or releasing the coil.

[0009] Furthermore, the transmission unit also includes a screw sleeve fitted over the guide screw, with one end of the guide screw extending out of the screw sleeve and connecting to the manual drive unit.

[0010] Furthermore, the screw sleeve is provided with a first limiting groove and a second limiting groove, and the transmission unit also includes a first limiting block respectively provided in the first limiting groove and a second limiting block provided in the second limiting groove. The first limiting block is connected to the first nut by a first bolt, the second limiting block is connected to the second nut by a second bolt, the first connecting piece is connected to the first limiting block, and the second connecting piece is connected to the second limiting block.

[0011] Furthermore, the screw sleeve is symmetrically arranged with three first limiting grooves and three second limiting grooves along its radial direction. The transmission unit also includes a first limiting block disposed in each of the first limiting grooves and a second limiting block disposed in each of the second limiting grooves. Each first limiting block is connected to the first nut by the first bolt, and each second limiting block is connected to the second nut by the second bolt. The thrust unit includes three first connecting pieces, three second connecting pieces, and three support rods. The two ends of each first connecting piece are respectively connected to the corresponding first limiting block and the corresponding support rod, and the two ends of each second connecting piece are respectively connected to the corresponding second limiting block and the corresponding support rod.

[0012] Furthermore, the guide screw is provided with a first threaded section and a second threaded section, the first nut is provided on the first threaded section, the second nut is provided on the second threaded section, and the threads of the first threaded section and the second threaded section have opposite directions of rotation.

[0013] Furthermore, the thrust unit also includes an outer cover disposed on the support rod.

[0014] Furthermore, the screw sleeve is also provided with a guide post, and the support rod is provided with a guide hole for installing the guide post.

[0015] Furthermore, the manual drive unit includes a handwheel connected to one end of the guide screw, and the handwheel is also provided with a locking hole for preventing the guide screw from rotating.

[0016] Furthermore, it also includes a braking unit connected to the screw sleeve and used to drive the screw sleeve to rotate.

[0017] Furthermore, the braking unit includes a drive shaft connected to the screw sleeve and a brake for driving the drive shaft to rotate.

[0018] (3) Beneficial effects

[0019] In summary, this invention uses two nuts that move synchronously in opposite directions to drive the corresponding connecting piece to drive the support rod, which in turn moves the outer cover in a radial direction away from the guide screw, thus opening the inner hole of the material roll to achieve tensioning of the material roll. It also causes the outer cover to contract radially towards the guide screw, disengaging from the inner hole of the material roll to loosen it, facilitating material roll replacement. Compared to existing technologies, this invention employs a purely mechanical assembly structure, reducing the number of electrical and pneumatic control components and significantly saving space where electrical and pneumatic control components are not required. This not only reduces the weight of the material roll handling mechanism itself but also enables rapid material roll replacement.

[0020] The present invention also provides a solution by setting up three sets of symmetrically arranged support rods, connecting pieces, limiting blocks and limiting grooves, which are evenly distributed at 120° along the circumference of the inner hole of the material roll to be supported. This can fully ensure the uniformity and stability of the support force on the inner wall of the material roll to be supported. Since three sets of support rods provide support force to the inner wall of the material roll to be supported at the same time, as long as one set of support rods can fit against the inner wall of the material roll to be supported, the material roll to be supported can be tensioned, and the adaptability and reliability of the material roll tensioning mechanism are improved.

[0021] This invention utilizes threads with opposite directions to achieve synchronous reverse movement of the first nut and the second nut, resulting in a simple and low-cost mechanical transmission structure that improves the stability of torque transmission.

[0022] This invention employs a power combination of a brake and a drive shaft, which is not only simple in structure and low in cost, but can also be used to drive the screw sleeve to rotate in order to adjust the radial deflection angle of the support rod around the screw sleeve. This achieves the fitting accuracy between the support rod and the outer cover and the inner wall of the material roll to be supported, ensuring the stability of the material roll support. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0025] Figure 2 This is another structural schematic diagram of an embodiment of the present invention.

[0026] In the picture:

[0027] 1-Handwheel; 10-Screw sleeve; 11-Locking hole; 101-First limiting groove; 102-Second limiting groove;

[0028] 2-Guide screw; 20-First bolt; 21-First threaded section; 22-Second threaded section;

[0029] 3-Adjusting shim; 30-Second bolt;

[0030] 40 - Drive shaft; 41 - First connecting piece; 42 - Second connecting piece;

[0031] 50 - Brake; 51 - First limiting block; 52 - Second limiting block;

[0032] 6-Guide column;

[0033] 71 - First nut; 72 - Second nut;

[0034] 8-Support rod;

[0035] 9-Outer cover. Detailed Implementation

[0036] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments, and any modifications, substitutions and improvements to the parts, components and connection methods are covered without departing from the spirit of the present invention.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] like Figure 1 As shown, the coil tensioning mechanism integrated on the filament layer is used to tension and release the coil. It includes a manual drive unit for providing driving force; a transmission unit connected to the manual drive unit; and a thrust unit connected to the transmission unit and opened or closed under the driving force of the manual drive unit for tensioning or releasing the coil. The transmission unit includes a guide screw 2 connected to the manual drive unit, and a first nut 71 and a second nut 72 disposed on the guide screw 2 and moving synchronously in opposite directions under the driving force. The thrust unit includes a first connecting piece 41, a second connecting piece 42, and a support rod 8. The two ends of the first connecting piece 41 are connected to the first nut 71 and the support rod 8, respectively. The two ends of the second connecting piece 42 are connected to the second nut 72 and the support rod 8, respectively. The first nut 71 and the second nut 72 move synchronously in opposite directions under the driving force, causing the support rod 8 to be in an open or closed state for tensioning or releasing the coil.

[0039] This invention employs a purely mechanical transmission structure, utilizing the rotation of the guide screw to achieve the opposite synchronous movement of the first and second nuts, thereby driving the support rod to open or close, thus achieving the purpose of tensioning or releasing the material roll. Compared with existing technologies, this reduces the number of electrical and pneumatic control components, and also greatly saves space that does not require the installation of electrical and pneumatic control components. It not only reduces the weight of the material roll handling mechanism itself, but also enables rapid replacement of the material roll.

[0040] As a preferred embodiment, such as Figure 2 As shown, the transmission unit also includes a screw sleeve 10 that is fitted over the guide screw 2. One end of the guide screw 2 extends out of the screw sleeve 10 and is connected to the manual drive unit. An adjusting pad 3 is also fitted on the guide screw 2. The adjusting pad 3 is located inside the screw sleeve 10 and is pressed against the end face of the screw sleeve 10 near the manual drive unit by the step on the guide screw 2.

[0041] As another preferred implementation, such as Figure 2As shown, the screw sleeve 10 is provided with a first limiting groove 101 and a second limiting groove 102. The transmission unit also includes a first limiting block 51 respectively disposed in the first limiting groove 101 and a second limiting block 52 disposed in the second limiting groove 102. The first limiting block 51 is connected to the first nut 71 by a first bolt 20, and the second limiting block 52 is connected to the second nut 72 by a second bolt 30. A first connecting piece 41 is connected to the first limiting block 51, and a second connecting piece 42 is connected to the second limiting block 52. By providing limiting grooves on the screw sleeve and fixing limiting blocks located in corresponding limiting grooves on the first nut and the second nut, the linear movement of the nut located in the screw sleeve is transmitted to the support rod, thereby realizing the support and release of the material coil.

[0042] As another alternative implementation method.

[0043] Preferably, such as Figure 2 As shown, the screw sleeve 10 has three first limiting grooves 101 and three second limiting grooves 102 (the other two are not shown) symmetrically arranged along its radial direction. The transmission unit also includes a first limiting block 51 disposed in each first limiting groove 101 and a second limiting block 52 disposed in each second limiting groove 102. Each first limiting block 51 is connected to a first nut 71 by a first bolt 20, and each second limiting block 52 is connected to a second nut 72 by a second bolt 30. The thrust unit includes three first connecting pieces 41, three second connecting pieces 42, and three support rods 8 (the other two are not shown). The two ends of each first connecting piece 41 are respectively connected to the corresponding first limiting block 51 and the corresponding support rod 8, and the two ends of each second connecting piece 42 are respectively connected to the corresponding second limiting block 52 and the corresponding support rod 8. By setting up three sets of symmetrically arranged support rods, connecting plates, limiting blocks, and limiting grooves, which are evenly distributed at 120° along the circumference of the inner hole of the material roll to be supported, the uniformity and stability of the support force on the inner wall of the material roll to be supported can be fully guaranteed. Since three sets of support rods provide support force to the inner wall of the material roll to be supported at the same time, as long as one set of support rods can fit against the inner wall of the material roll to be supported, the material roll to be supported can be tensioned, and the adaptability and reliability of the material roll tensioning mechanism are improved.

[0044] Preferably, such as Figure 1 and Figure 2 As shown, the guide screw 2 has a first threaded section 21 and a second threaded section 22. The first nut (71) is located on the first threaded section 21, and the second nut (72) is located on the second threaded section 22. The threads of the first threaded section 21 and the second threaded section 22 have opposite directions of rotation. By using threads with opposite directions of rotation, the first nut and the second nut can move synchronously in opposite directions, making the mechanical transmission structure simple, low-cost, and improving the stability of torque transmission.

[0045] Preferably, such as Figure 2 As shown, the thrust unit also includes an outer cover mounted on the support rod 8. The support rod 8 is fixedly connected to the outer cover 9 by screws. The shape of the outer cover 9 can be matched based on the inner hole shape of the material roll to be supported. The detachable connection method facilitates disassembly and assembly, and it is applicable to material rolls with various inner hole shapes, increasing adaptability. Since multiple sets of support rods 8 are used, the number of corresponding outer covers 9 can also correspond to them.

[0046] Preferably, such as Figure 2 As shown, the screw sleeve 10 is also provided with a guide post 6, and the support rod 8 is provided with a guide hole for installing the guide post 6. By utilizing the cooperation between the guide post 6 and the guide hole, the support rod 8 can move up and down along the length direction of the guide post 6 when it is expanding or contracting, so as to prevent the support rod 8 from swaying during the movement and reducing the fitting accuracy between the outer cover 9 and the inner wall of the material roll.

[0047] Preferably, such as Figure 2 As shown, the manual drive unit includes a handwheel 1 connected to one end of the guide screw 2. The handwheel 1 is also provided with a locking hole 11 to prevent the guide screw 2 from rotating. Specifically, multiple pin holes are provided on one end of the guide screw 2 connected to the handwheel 3. By using a fixing pin to pass through the locking hole 11 and the corresponding pin hole in sequence, the guide screw 2 can be locked, further preventing it from rotating on its own and affecting the continuous stretching of the material roll. As a preferred embodiment, the handwheel 1 can also be controlled by an automatic drive method using a small stepper motor. In order to ensure that the material roll tensioning mechanism of the present invention provides a consistent support force to all the material rolls to be supported, multiple angled positioning beads can be evenly arranged around the radial circumference of the end where the guide screw 2 is connected to the handwheel 1. After each rotation of the handle is fixed to the same angled positioning bead, the operator knows that the material roll has been clamped, which improves the convenience of operation.

[0048] Preferably, such as Figure 2 As shown, the coil tensioning mechanism also includes a braking unit connected to the screw sleeve 10 and used to drive the screw sleeve 10 to rotate. This braking unit drives the screw sleeve 10 to rotate, adjusting the radial deflection angle of the support rod 8 around the screw sleeve 10. This ensures the fitting accuracy between the support rod 8 and the outer cover 9 and the inner wall of the coil to be supported, guaranteeing the stability of the coil support. The braking unit includes a drive shaft 40 connected to the screw sleeve 10 and a brake 50 for driving the drive shaft 40 to rotate. This combination of brake and drive shaft power results in a simple structure and low cost.

[0049] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0050] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art without departing from the scope of the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A coil tensioning mechanism integrated into a filament placing machine, used for tensioning and releasing the coil, characterized in that, include: Manual drive unit, used to provide driving force; The transmission unit is connected to the manual drive unit; A thrust unit, connected to the transmission unit and opened or closed under the driving force of the manual drive unit, is used to tension or release the material roll; The transmission unit includes a guide screw (2) connected to the manual drive unit, and a first nut (71) and a second nut (72) disposed on the guide screw (2) and moving synchronously in opposite directions under the action of the driving force; The thrust unit includes a first connecting piece (41), a second connecting piece (42), and a support rod (8). The two ends of the first connecting piece (41) are respectively connected to the first nut (71) and the support rod (8), and the two ends of the second connecting piece (42) are respectively connected to the second nut (72) and the support rod (8). The thrust unit also includes an outer cover (9) disposed on the support rod (8). The first nut (71) and the second nut (72) move in opposite directions synchronously under the action of the driving force, causing the support rod (8) to be in an open or closed state, which is used to tension or release the material roll; The transmission unit further includes a screw sleeve (10) fitted over the guide screw (2); the screw sleeve (10) is provided with a first limiting groove (101) and a second limiting groove (102); the transmission unit further includes a first limiting block (51) respectively disposed in the first limiting groove (101) and a second limiting block (52) disposed in the second limiting groove (102); the first limiting block (51) is connected to the first nut (71) by a first bolt (20); the second limiting block (52) is connected to the second nut (72) by a second bolt (30); the first connecting piece (41) is connected to the first limiting block (51); and the second connecting piece (42) is connected to the second limiting block (52). The screw sleeve (10) is also provided with a guide post (6), and the support rod (8) is provided with a guide hole for installing the guide post (6). By utilizing the cooperation relationship between the guide post (6) and the guide hole, the support rod (8) can move up and down along the length direction of the guide post (6) when it is expanding or contracting, so as to prevent the support rod (8) from swaying during the movement. It also includes a braking unit connected to the screw sleeve (10) and used to drive the screw sleeve (10) to rotate, the braking unit being used to drive the screw sleeve (10) to rotate to adjust the radial deflection angle of the support rod (8) about the screw sleeve (10).

2. The coil tensioning mechanism integrated on the filament layer according to claim 1, characterized in that, One end of the guide screw (2) extends out of the screw sleeve (10) and connects to the manual drive unit.

3. The coil tensioning mechanism integrated on a filament layer according to claim 1, characterized in that, The screw sleeve (10) is symmetrically arranged with three first limiting grooves (101) and three second limiting grooves (102) along its radial direction. The transmission unit also includes a first limiting block (51) disposed in each of the first limiting grooves (101) and a second limiting block (52) disposed in each of the second limiting grooves (102). Each first limiting block (51) is connected to the first nut (71) by the first bolt (20), and each second limiting block (52) is connected to the second nut (72) by the second bolt (30). The thrust unit includes three first connecting pieces (41), three second connecting pieces (42), and three support rods (8). The two ends of each first connecting piece (41) are respectively connected to the corresponding first limiting block (51) and the corresponding support rod (8), and the two ends of each second connecting piece (42) are respectively connected to the corresponding second limiting block (52) and the corresponding support rod (8).

4. The coil tensioning mechanism integrated on the filament layer according to claim 1, characterized in that, The guide screw (2) is provided with a first threaded section (21) and a second threaded section (22). The first nut (71) is provided on the first threaded section (21), and the second nut (72) is provided on the second threaded section (22). The threads of the first threaded section (21) and the second threaded section (22) are opposite in direction.

5. The coil tensioning mechanism integrated on the filament layer according to claim 2, characterized in that, The manual drive unit includes a handwheel (1) connected to one end of the guide screw (2), and the handwheel (1) is also provided with a locking hole (11) for preventing the guide screw (2) from rotating.

6. The coil tensioning mechanism integrated on a filament layer according to claim 1, characterized in that, The braking unit includes a drive shaft (40) connected to the screw sleeve (10) and a brake (50) for driving the drive shaft (40) to rotate.

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