Roller swing arm mechanism

Abstract

The utility model provides a roller swing arm mechanism. The roller swing arm mechanism comprises a driving device; one end of the swing arm assembly is connected with the driving device; the roller is mounted at the other end of the swing arm assembly; the pressurizing device is arranged on the swing arm assembly; the driving device drives the swing arm assembly to rotate relative to the driving device, and meanwhile, the pressurizing device applies force to the swing arm assembly, so that the swing arm assembly drives the roller to tightly press a prepreg sheet on a mold, and the prepreg sheet is rolled and pre-bent according to the shape of the mold. The device only comprises the driving device, the swing arm assembly, the roller and the pressurizing device, and is simple in overall structure and convenient to operate; the design of the pressurizing device can apply force for tightly pressing the prepreg sheet on the die to the downwards-pressed roller, the side face rolling and pre-bending effect is guaranteed, and the phenomenon that reinforcement bodies at the bent positions are twisted, wrinkled or cracked when the prepreg sheet is heated, pressurized and formed can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of long string-shaped composite material molding and processing technology, specifically to a roller swing arm mechanism. Background Technology

[0002] As a key load-bearing component in lightweight structures for aerospace, rail transportation and other fields, resin-based composite stringers are subject to molding and processing technologies that directly affect their mechanical properties, dimensional accuracy and manufacturing costs.

[0003] Currently, the molding and processing of resin-based composite stringers mainly involves manually laying or using a tape-laying machine to first lay the prepreg layer by layer until the total thickness of the prepreg sheet meets the required stringer thickness. Then, using molding technologies such as heat-insulating film molding, the prepreg sheet is placed on a heat-insulating film molding fixture. Vacuuming and heating methods are used to soften and flow the resin in the prepreg, filling all corners of the mold to achieve the desired shape. Finally, after reaching the predetermined time and temperature, it is completely cooled and cured. However, when using heat-insulating film molding to process Ω-shaped stringers, the side bending of the prepreg sheet is prone to differences in the degree and direction of deformation in different parts due to high-intensity heating and pressure. This can easily lead to uneven stress on the reinforcement (such as carbon fiber, glass fiber, aramid fiber, etc.) at the deformation points. Uneven stress deformation may cause the shape of the reinforcement at the bending points to be distorted, forming wrinkles; and even in some areas of excessive stress concentration, the reinforcement may crack, affecting product quality.

[0004] Therefore, designing a roller swing arm mechanism that can pre-bend the side of prepreg sheets to prevent the reinforcement at the bending point from twisting, wrinkling, or cracking during the heating and pressing process is an urgent problem to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a roller swing arm mechanism for pre-bending the side of prepreg sheets, which can prevent the reinforcement at the bending point of the prepreg sheet from twisting, wrinkling or cracking during the heating and pressing process.

[0006] To achieve the above and other objectives, this utility model is implemented through the following technical solution: As a first aspect, this utility model proposes a roller swing arm mechanism, comprising: a driving device; a swing arm assembly, one end of which is connected to the driving device; a roller, installed at the other end of the swing arm assembly; and a pressurizing device disposed on the swing arm assembly; the driving device drives the swing arm assembly to rotate relative to the driving device, while the pressurizing device applies force to the swing arm assembly, causing the swing arm assembly to drive the roller to tightly press the prepreg sheet onto the mold and roll-press and pre-bend the prepreg sheet following the shape of the mold.

[0007] In one embodiment, the driving device is a handle, the swing arm assembly is a plurality of connected swing arms, and the pressurizing device is an elastic element.

[0008] In one embodiment, the two ends of the handle are rotatably connected to one end of each of the two connecting arms, and the other ends of the two opposing connecting arms located at different ends of the handle are connected to the roller; the elastic element is provided between the two connecting arms located at the same end of the handle.

[0009] In one embodiment, the driving device is a motor, the swing arm assembly is a swing arm connecting rod, and the pressurizing device is a cylinder, a hydraulic cylinder, or an electric cylinder.

[0010] In one embodiment, the swing arm connecting rod is mounted on the base and includes a first connecting rod and a second connecting rod; one end of the first connecting rod is rotatably connected to the base, and the other end of the first connecting rod is rotatably connected to one end of the second connecting rod; the other end of the second connecting rod is fitted with the roller; the motor is used to drive the first connecting rod to rotate; the movable end of the pressurizing device is fixed to the second connecting rod, and the fixed end is rotatably connected to the base, for providing pressure to press down the roller.

[0011] In one embodiment, two of each of the first connecting rod, the second connecting rod, and the pressurizing device are provided.

[0012] In one embodiment, the first connecting rod / second connecting rod is a straight rod.

[0013] In one embodiment, the two ends of a pair of first connecting rods are respectively connected by a rotating shaft; and the motor is provided on the rotating shaft near the base.

[0014] In one embodiment, one first connecting rod / second connecting rod is provided; the first connecting rod is a straight rod, and the second connecting rod is a Y-shaped rod; the symmetrical forked section of the second connecting rod is used to install the roller, and the motor is connected to the first connecting rod.

[0015] In one embodiment, one of the pressurizing devices applies pressure to the straight section of the second connecting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The roller swing arm mechanism provided by this utility model only includes a driving device, a swing arm assembly, a roller and a pressurizing device. The overall structure is simple and easy to operate. The pressurizing device is designed to apply a force to the pressing roller to press the prepreg sheet tightly onto the mold, ensuring the side roller pre-bending effect. It can effectively prevent the reinforcement at the bending point of the prepreg sheet from twisting, wrinkling or cracking during the heating and pressing molding of the prepreg sheet.

[0018] 2. The roller swing arm mechanism provided by this utility model can perform side roller pre-bending on prepreg sheets, which can ensure that the sheets do not deform in the length direction, further ensuring the quality of composite material molding and processing, and ensuring the strength of the final stringer product;

[0019] 3. This utility model uses a handle as the driving device and springs and other elastic components as the pressing device. It has a simple structure and low cost. Manual double-sided or single-sided roller pressing can be completed by simply pressing down and lifting up. There are no restrictions on the size of the stringer. It can be applied to the forming of stringer components of various sizes or particularly complex shapes. It has a wide range of applications and is universal.

[0020] 4. This utility model uses an electric motor as the driving device and a cylinder as the pressurizing device, which can realize automated side rolling through mechanical control, reducing manual labor and improving rolling efficiency.

[0021] 5. The design of the rotating shaft of this utility model can better realize the motor's drive control of the swing arm connecting rod, and improve the precise control of the linkage of the swing arm connecting rod. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of the first embodiment of a roller swing arm mechanism according to this utility model.

[0023] Figure 2 This diagram shows the side width rolling state of a second embodiment of the roller swing arm mechanism of this utility model.

[0024] Figure 3 This is a schematic diagram showing the state before or after the start of side rolling of a second embodiment of the roller swing arm mechanism of this utility model.

[0025] In the diagram: 10 or 20, roller swing arm mechanism; 11, handle; 12, connecting swing arm; 13 or 23, roller; 21, base; 22, swing arm connecting rod; 221, first connecting rod; 222, second connecting rod; 223, rotating shaft; 24, pressurizing device;

[0026] A. Prepreg sheet; B. Mold. Detailed Implementation

[0027] Please see Figures 1-3 The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “a,” “an,” or “the,” as used herein, do not indicate a limitation of quantity, but merely indicate the presence of at least one. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The numbering of components in this specification, such as “first,” “second,” etc., is solely for distinguishing the described objects and has no sequential or technical meaning. The term “connection,” unless otherwise specified, includes both direct and indirect connections.

[0030] To avoid confusion with this utility model, some technical features known in the art have not been described.

[0031] This embodiment provides a roller swing arm mechanism including a driving device, a swing arm assembly, a roller, and a pressurizing device. The driving device is connected to one end of the swing arm assembly; the other end of the swing arm assembly is connected to the roller; the pressurizing device is disposed on the swing arm assembly; the driving device drives the swing arm assembly to rotate relative to the driving device, while the pressurizing device applies force to the swing arm assembly, so that the swing arm assembly drives the roller to tightly press the prepreg sheet onto the mold and roll-press and pre-bend the prepreg sheet according to the shape of the mold.

[0032] (Example 1)

[0033] like Figure 1As shown, this embodiment provides a roller swing arm mechanism 10. The driving device in this embodiment is a handle 11, the swing arm assembly consists of four connecting swing arms 12, and the pressing device is a spring or other elastic element. The two ends of the handle 11 are rotatably connected to one end of two connecting swing arms 12 respectively. The other ends of the two aligned connecting swing arms 12 located at different ends of the handle 11 are connected to a roller 13, which is a cylinder. An elastic element is provided between the two connecting swing arms 12 located at the same end of the handle 11. The elastic element is located in the middle section of the connecting swing arm 12, that is, between the handle 11 connection position and the roller 13 connection position of the connecting swing arm 12. The function of the elastic element is to apply a converging elastic force to the two pressed and separated rollers 13 to ensure that the rollers 13 always tightly press the prepreg sheet A onto the mold B during the rolling process.

[0034] By manually pressing down on the handle 11, the two connecting arms 12 at the same end can be driven to rotate and separate, thereby driving the two rollers 13 to roll and pre-bend the prepreg sheet A on both sides of the mold B. At this time, the elastic element is stretched and gains elasticity. When the rolling is finished, the manual handle 11 is lifted until the rollers 13 are removed from the mold B. At this time, the elastic element pulls the connecting arms 12 back to the initial position due to its own elasticity.

[0035] When the handle 11 is held down and the roller 13 is pressed down, the two rollers 13 can be pressed down symmetrically and vertically, so that the two rollers 13 can be pressed down synchronously along the shape of the mold B to bend both ends of the prepreg sheet A; or the two rollers 13 can be pressed down slightly, so that one roller 13 first bends one end of the prepreg sheet A along the shape of the mold B, while the other roller 13 first acts as a clamping and fixing force, and then applies force in the opposite direction to complete the bending of the other end of the prepreg sheet A.

[0036] (Example 2)

[0037] like Figure 2-3As shown, this embodiment provides a roller swing arm mechanism 20. The driving device in this embodiment is a motor, the swing arm assembly is a swing arm connecting rod 22, and the pressurizing device is a cylinder, a hydraulic cylinder, or an electric cylinder. Specifically, the roller swing arm mechanism 20 may include a base 21, a swing arm connecting rod 22, a roller 23, and a pressurizing device 24. The swing arm connecting rod 22 is mounted on the base 21 and includes a pair of first connecting rods 221, a pair of second connecting rods 222, and a pair of rotating shafts 223. One end of the first connecting rod 221 is rotatably connected to the base 21 via an ear plate and a rotating shaft 223, and the other end of the first connecting rod 221 is rotatably connected to one end of the second connecting rod 222 via another rotating shaft 223. The rotating shaft 223 is used to connect the two symmetrically arranged first connecting rods 221, and the rotating shaft 223 near the base 21 is driven to rotate by a motor (not shown in the figure). The motor can provide power for the overall swing arm movement of the swing arm connecting rod 22. The other end of the second connecting rod 222 is equipped with a roller 23. The movable end of the pressurizing device 24 (e.g., a cylinder) is fixed at the middle section of the second connecting rod 222, and the fixed end is rotatably connected to the base 21 via an ear plate. The pressurizing device 24 is located near the roller 23 and its function is to provide pressure to the lower roller 23.

[0038] During the bending operation, a roller swing arm mechanism 20 is symmetrically set on both sides of the mold B in the width direction. A motor drives the first connecting rod 221 to rotate towards the mold B, causing the second connecting rod 222 and the roller 23 to press the prepreg sheet A onto the mold B. Then, the pressure device 24 drives the second connecting rod 222 downwards, causing the roller 23 to roll along the shape of the mold B to bend both ends of the prepreg sheet A. During the downward pressing of the roller 23, the first connecting rod 221 and the second connecting rod 222 will rotate in a coordinated manner according to the shape of the mold B. The rolling operation of the two roller swing arm mechanisms 20 can be performed simultaneously or separately. After the rolling bending is completed, the motor and pressure device 24 can rotate the swing arm connecting rod 22 away from the mold B to open it, facilitating subsequent operations, such as lifting the mold B and the formed workpiece.

[0039] It should be noted that in this example, the first connecting rod 221, the second connecting rod 222, and the rotating shaft 223 are all arranged in a symmetrical pair, and the first connecting rod 221 and the second connecting rod 222 are both straight plates. Two pressure devices 24 are also provided to apply the same force to both ends of the roller 23, making the rolling force of the roller 23 more uniform. However, in other embodiments, only one straight first connecting rod 221 and one Y-shaped second connecting rod 222 can be provided. The straight section of the second connecting rod 222 is rotatably connected to the first connecting rod 221, and the symmetrical forked section is used to install the roller 23. The motor is directly connected to the first connecting rod 221, directly driving the first connecting rod 221 to rotate, without the need for a rotating shaft 223. Only one pressure device 24 is needed to apply pressure to the straight section of the second connecting rod 222.

[0040] In summary, the roller swing arm mechanism provided by this utility model includes both manual rolling and mechanical automatic rolling schemes, both of which can perform side pre-bending forming of prepreg sheet A. This can solve the problem of twisting, wrinkling, or cracking of the reinforcement at the bending point caused by directly heating and pressing prepreg sheet A in the prior art. In addition, the roller swing arm mechanism only includes a drive device, a swing arm assembly, a roller, and a pressing device. The overall structure is simple and easy to operate. The pressing device is designed to apply a force to the pressing roller 13 or roller 23 to tightly press the prepreg sheet A onto the mold B, ensuring the bending effect.

[0041] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A roller swing arm mechanism, characterized in that, include: Drive unit; The swing arm assembly is connected at one end to the drive device; A roller is installed at the other end of the swing arm assembly; A pressurizing device is installed on the swing arm assembly; The driving device drives the swing arm assembly to rotate relative to the driving device, while the pressurizing device applies force to the swing arm assembly, causing the swing arm assembly to drive the roller to tightly press the prepreg sheet onto the mold and roll-press and pre-bend the prepreg sheet following the shape of the mold.

2. The roller swing arm mechanism according to claim 1, characterized in that, The driving device is a handle, the swing arm assembly is a plurality of connected swing arms, and the pressurizing device is an elastic element.

3. The roller swing arm mechanism according to claim 2, characterized in that, The two ends of the handle are rotatably connected to one end of each of the two connecting arms. The other ends of the two connecting arms located at different ends of the handle are connected to the roller. The elastic element is provided between the two connecting arms located at the same end of the handle.

4. The roller swing arm mechanism according to claim 1, characterized in that, The driving device is a motor, the swing arm assembly is a swing arm connecting rod, and the pressurizing device is a cylinder, a hydraulic cylinder, or an electric cylinder.

5. The roller swing arm mechanism according to claim 4, characterized in that, The swing arm connecting rod is mounted on the base and includes a first connecting rod and a second connecting rod; one end of the first connecting rod is rotatably connected to the base, and the other end of the first connecting rod is rotatably connected to one end of the second connecting rod; the other end of the second connecting rod is equipped with the roller; the motor is used to drive the first connecting rod to rotate; the movable end of the pressurizing device is fixed to the second connecting rod, and the fixed end is rotatably connected to the base, for providing pressure to press down the roller.

6. The roller swing arm mechanism according to claim 5, characterized in that, There are two of each of the first connecting rod, the second connecting rod, and the pressurizing device.

7. The roller swing arm mechanism according to claim 6, characterized in that, The first connecting rod / second connecting rod is a straight rod.

8. The roller swing arm mechanism according to claim 6, characterized in that, The two ends of the pair of first connecting rods are respectively connected by a rotating shaft; and the motor is provided on the rotating shaft near the base.

9. The roller swing arm mechanism according to claim 5, characterized in that, There is one first connecting rod and one second connecting rod; the first connecting rod is a straight rod, and the second connecting rod is a Y-shaped rod; the symmetrical forked section of the second connecting rod is used to install the roller, and the motor is connected to the first connecting rod.

10. The roller swing arm mechanism according to claim 9, characterized in that, One of the pressurizing devices applies pressure to the straight section of the second connecting rod.

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