A mechanical expansion shaft for fixing a material roll

Abstract

The present invention discloses a mechanical expansion shaft for fixing a material roll, which relates to the technical field of material roll fixing, and may include: a support shaft, a sleeve and a bottom cover, wherein the bottom end of the support shaft is connected to the bottom cover, and the sleeve is sleeved on the outside of the bottom of the support shaft; a tile is arranged on the outside of the sleeve, and a first slider is arranged in the sleeve, and a connecting part is arranged on the first slider, and the connecting part passes through the side wall of the sleeve and is connected to the tile; a radial spring is connected between the first slider and the inner wall of the sleeve, and the radial spring is sleeved on the connecting part; a cone sleeve is connected to the bottom cover through an axial spring, and the cone sleeve is sleeved on the support shaft, and the cone sleeve is used to open the first slider; a second slider is slidably arranged on the bottom cover, and the second slider is connected to the cone sleeve through a connecting mechanism. The present invention can limit the axial movement of the material roll while fixing the material roll, and also has the function of preventing the machine from falling off when shutting down, thereby improving the reliability and stability of the equipment; avoiding the staggered overlapping of the air pipes, and saving the limited space of the yarn frame.

Description

Technical Field

[0001] The invention relates to the technical field of material roll fixing, and in particular to a mechanical expansion shaft for material roll fixing. Background Art

[0002] Carbon fiber reinforced composite materials have been widely used in the aerospace field due to their high specific strength, specific modulus, corrosion resistance and other characteristics. In order to meet the manufacturing needs of large parts in the aviation field, large-scale fiber automatic placement equipment, such as automatic wire and tape placement equipment, is often required. Through path planning, the manufacturing of large curvature and complex special-shaped components can be achieved, with high placement efficiency, high material utilization, and high degree of automation.

[0003] The raw materials used in the automatic fiber placement equipment are rolls made of rewound fiber filaments. Before laying, the roll needs to be fixed on the air shaft, and a certain amount of air pressure is applied to the air shaft to open the tiles on the side of the air shaft, thereby providing a tightening force to fix the roll. However, when the robot is laying, it often changes the laying speed and posture. If the friction between the air shaft and the roll is small or the air pressure fluctuates, the roll will move along the axial direction under the action of inertia, thereby causing changes in the tension of the tow. At this time, the tension control module needs to be adjusted in time, otherwise the laying quality will be affected. When the roll needs to be replaced, the air circuit is first disconnected, the roll is removed, a new roll is installed, and the air circuit is reopened. The entire operation process is relatively cumbersome, and the electrical equipment needs to be kept in good operation at all times, and the fault tolerance rate is low. Once a power outage or air source failure occurs, the roll will fall off, causing danger and posing serious safety hazards.

[0004] In addition, the manufacturing process of the air shaft is relatively complicated, and a long inner hole needs to be opened along the axis of the support shaft for the air path, which increases the manufacturing cost. Moreover, each air shaft needs to be equipped with an air pipe connector at the front end, which will cause redundant air pipes and occupy the creel space for multi-tow (16-tow) automatic placement equipment.

[0005] As for some mechanical expansion shafts on the market, although they do not need to be coordinated with a large number of pneumatic components, they still need to be used in conjunction with electrical equipment such as motors to provide expansion force. The operation is cumbersome, the degree of automation is not high, and there is a lack of anti-falling function design for the material roll.

[0006] Therefore, it is urgent to develop a mechanical expansion shaft for fixing the material roll to solve the above problems existing in the prior art. Summary of the invention

[0007] The purpose of the present invention is to provide a mechanical expansion shaft for fixing a material roll to solve the above-mentioned problems existing in the prior art. It can fix the material roll while limiting the axial movement of the material roll, and also has the function of preventing the material roll from falling off when shutting down, thereby improving the reliability and stability of the equipment; avoiding the staggered overlapping of the air pipes and saving the limited space of the yarn frame.

[0008] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a mechanical expansion shaft for fixing a material roll, comprising: a support shaft, a sleeve and a bottom cover, the bottom end of the support shaft is connected to the bottom cover, and the sleeve is sleeved on the outer side of the bottom of the support shaft; a tile is provided on the outer side of the sleeve, and a first slider is provided in the sleeve, and a connecting part is provided on the first slider, and the connecting part passes through the side wall of the sleeve and is connected to the tile; a radial spring is connected between the first slider and the inner wall of the sleeve, and the radial spring is sleeved on the connecting part; a cone sleeve is connected to the bottom cover through an axial spring, and the cone sleeve is sleeved on the support shaft, and the cone sleeve is used to open the first slider; a second slider is slidably provided on the bottom cover, and the second slider is connected to the cone sleeve through a connecting mechanism.

[0009] Preferably, a plurality of the first sliding blocks are provided, and the plurality of the first sliding blocks are evenly distributed along the circumference of the support shaft, and the number of the tiles is the same as the number of the first sliding blocks.

[0010] Preferably, the first slider is a wedge-shaped slider, the connecting portion on the outer wall of the wedge-shaped slider is a cylindrical boss, two cylindrical bosses are provided on the outer wall of each wedge-shaped slider, an internal threaded hole is provided at one end of the cylindrical boss close to the tile, and the cylindrical boss is connected to the tile by bolts.

[0011] Preferably, a through hole is provided on the side wall of the sleeve for allowing the cylindrical boss to pass through, and the diameter of the radial spring is larger than the diameter of the through hole.

[0012] Preferably, the diameter of the cone sleeve at one end close to the first sliding block is smaller than the diameter of the cone sleeve at one end close to the bottom cover.

[0013] Preferably, a side of the sliding block close to the cone sleeve is an inclined surface, the angle of the inclined surface matches that of the cone sleeve, and the inclined surface is always in contact with the cone sleeve.

[0014] Preferably, the elastic coefficient of the axial spring is greater than the elastic coefficient of the radial spring.

[0015] Preferably, two grooves are symmetrically arranged on the bottom of the bottom cover, and a second slider is slidably arranged in each of the grooves. In an initial state, the distance from the outermost side of the second slider to the center of the bottom cover is greater than the radius of the material roll; and the side edge of the second slider is arc-shaped.

[0016] Preferably, the connecting mechanism is a connecting rod mechanism or a cam mechanism.

[0017] Preferably, the surface of the tile is subjected to anti-slip treatment.

[0018] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0019] The present invention adopts a mechanical expansion shaft, which does not need to be matched with a large number of pneumatic components, and can avoid a large number of air pipes occupying the creel space;

[0020] It is more convenient to change the material roll, without repeated pneumatic and electrical control;

[0021] Compared with pneumatic expansion shafts, the use of mechanical expansion shafts can significantly reduce the manufacturing and maintenance costs of equipment;

[0022] The second slider at the bottom of the mechanical expansion shaft can limit the material roll more effectively and improve the reliability of the equipment.

[0023] The present invention can effectively fix the material roll during the operation of the equipment to prevent the material roll from moving relative to the support shaft; and can realize the rapid replacement of the material roll without the need for pneumatic and electric components to cooperate with each other, thereby greatly improving the working efficiency and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural diagram of a mechanical expansion shaft;

[0026] Figure 2 It is a cross-sectional view of a mechanical expansion shaft;

[0027] Figure 3 It is a partial schematic diagram of the connecting rod mechanism;

[0028] Figure 4 It is a schematic diagram of the motion between the second slider and the cone sleeve;

[0029] Figure 5 is a cross-sectional view of the interior of the sleeve;

[0030] Figure 6 is a three-dimensional schematic diagram of the second slider;

[0031] Figure 7 It is a three-dimensional schematic diagram of the cone sleeve;

[0032] Figure 8 It is a schematic diagram of the pre-assembly of the mechanical expansion shaft and the material coil;

[0033] Fig. 9 is the final assembly schematic;

[0034] In the figure: 1 is the second slider, 2 is the connecting rod, 3 is the axial spring, 4 is the radial spring, 5 is the bottom cover, 6 is the cone sleeve, 7 is the sleeve, 8 is the tile, 9 is the wedge slider, 10 is the supporting shaft, and 11 is the material roll. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1-9 As shown, this embodiment provides a mechanical expansion shaft for fixing a material roll, comprising: a support shaft 10, a sleeve 7 and a bottom cover 5, the bottom end of the support shaft 10 is connected to the bottom cover 5, and the sleeve 7 is sleeved on the outside of the bottom of the support shaft 10; a tile 8 is provided on the outside of the sleeve 7, and a first slider is provided in the sleeve 7, and a connecting portion is provided on the first slider, which passes through the side wall of the sleeve 7 and is connected to the tile 8; a radial spring 4 is connected between the first slider and the inner wall of the sleeve, and the radial spring 4 is sleeved on the connecting portion; a conical sleeve 6 is connected to the bottom cover through an axial spring 3, and the conical sleeve 6 is sleeved on the support shaft 10, and the conical sleeve 6 is used to open the first slider; a second slider 1 is slidably provided on the bottom cover 5, and the second slider 1 is connected to the conical sleeve 6 through a connecting mechanism.

[0038] In this embodiment, if Figure 1 As shown, the support shaft 10 is the main body, providing support and fixation for other components.

[0039] In this embodiment, if Figure 2 , Figure 3As shown, there are multiple first sliders, which are evenly distributed along the circumference of the support shaft 10, and the number of tiles 8 corresponds to the same number of the first sliders. Among them, the first slider is a wedge-shaped slider 9, and one side of the wedge-shaped slider 9 has two cylindrical bosses as connecting parts. The radial spring 4 is sleeved on the cylindrical bosses, and the cylindrical bosses can pass through the through holes on the side of the sleeve 7, but the diameter of the through holes is smaller than the diameter of the radial spring 4. Therefore, when the wedge-shaped slider 9 moves radially along the through holes, it will cause the radial spring 4 to deform, and the top of the cylindrical boss is provided with an internal threaded hole for connecting the tile 8.

[0040] In this embodiment, a through hole is provided in the center of the cone sleeve 6 and the cone sleeve 6 can slide axially along the support shaft 10, and the side of the cone sleeve 6 is always in contact with the side of the wedge-shaped slider 9. One end (bottom end) of the support shaft 10 has an internal threaded hole for fixing the bottom cover 5. Two grooves are symmetrically arranged on the bottom cover 5, and the second slider 1 can slide in the grooves. The second slider 1 is connected to the cone sleeve 6 through a connecting mechanism, wherein the connecting mechanism can select a conventional connecting mechanism such as a connecting rod mechanism or a cam mechanism as required; in this embodiment, the connecting mechanism preferably adopts a connecting rod mechanism, and the connecting rod mechanism includes a connecting rod 2, and the upper and lower ends of the connecting rod 2 are respectively rotatably connected to the cone sleeve 6 and the second slider 1. The axial spring 3 is sleeved on the support shaft 10 and placed between the bottom cover 5 and the cone sleeve 6.

[0041] In this embodiment, in the initial state, since the elastic coefficient of the axial spring 3 is much greater than the elastic coefficient of the radial spring 4, the cone sleeve 6 always presses the wedge-shaped slider 9 to the right and supports the tile 8. At this time, the second slider 1 is in the extreme position, and its distance from the center of the bottom cover is the largest. The second slider 1 is connected to the cone sleeve 6 by a connecting rod, and the motion diagram is as follows: Figure 4 shown.

[0042] When the material roll 11 starts to be installed, the second slider 1 at the bottom first contacts the inner wall of the material roll 11 and is squeezed. Due to the arc-shaped design of the side of the second slider 1, the squeezing force will drive the second slider 1 to move toward the radial center. At this time, the second slider 1 drives the cone sleeve 6 to move to the left through the connecting rod 2 and squeezes the axial spring 3. Since the wedge-shaped slider 9 loses the squeezing of the axial spring 3, the radial spring 4 will exert a force on the wedge-shaped slider 9 to move the wedge-shaped slider 9 toward the radial center, thereby tightening the tile 8 to ensure the smooth installation of the material roll 11.

[0043] When the bottom of the material roll 11 completely passes over the second slider 1, the second slider 1 will move to the extreme positions on both sides because there is no external squeezing force. At this time, the axial spring 3 will return to the initial position and drive the cone sleeve 6 to move to the right, and then squeeze the wedge-shaped slider 9 and overcome the force of the radial spring 4, so that the tile 8 expands, thereby achieving the function of tightening the material roll. The material roll 11 will be completely fixed and will not move with the changes in the speed and posture of the robot, thereby improving the reliability of the equipment.

[0044] In this embodiment, the surface of the tile 8 is treated with anti-slip treatment, mainly the side close to the material roll 11 is treated with anti-slip treatment to enhance the friction between the tile 8 and the inner wall of the material roll 11; the anti-slip treatment method is selected according to needs, such as applying an anti-slip coating, or opening an anti-slip groove, etc.

[0045] When the material roll 11 needs to be replaced, the operator can use his fingers to apply radial force to the second slider 1 at the bottom to make it move toward the radial center. At this time, the principle is the same as when the material roll 11 is installed. The second slider 1 drives the cone sleeve 6 to move to the left again through the connecting rod 2 and squeezes the axial spring 3. The wedge-shaped slider 9 contracts the tile 8 under the force of the radial spring 4. At this time, the friction between the material roll 11 and the mechanical expansion shaft disappears, and the operator can smoothly pull out the material roll to achieve rapid replacement of the material roll.

[0046] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A mechanical expansion shaft for fixing a material roll, characterized in that: include: The cam is provided with a first sliding block, and the first sliding block is provided with a connecting portion, and the connecting portion passes through the side wall of the sleeve and is connected to the tile; a radial spring is connected between the first sliding block and the inner wall of the sleeve, and the radial spring is sleeved on the connecting portion; a cone sleeve is connected to the bottom cover through an axial spring, and the cone sleeve is sleeved on the support shaft, and the cone sleeve is used to open the first sliding block; a second sliding block is slidably provided on the bottom cover, and the second sliding block is connected to the cone sleeve through a connecting mechanism; two grooves are symmetrically provided on the bottom of the bottom cover, and a second sliding block is slidably provided in each of the grooves. In the initial state, the distance from the outermost side of the second sliding block to the center of the bottom cover is greater than the radius of the material roll; the side of the second sliding block is arc-shaped; The side of the first slider close to the cone sleeve is an inclined surface, the angle of the inclined surface matches the cone sleeve, and the inclined surface is always in contact with the cone sleeve; the elastic coefficient of the axial spring is greater than the elastic coefficient of the radial spring; the first slider is a wedge-shaped slider, the connecting portion on the outer wall of the wedge-shaped slider is a cylindrical boss, and the wedge-shaped slider is fixedly connected to the tile through the cylindrical boss; Among them, when the second slider contacts the inner wall of the material roll and is squeezed, the extrusion force drives the second slider to move toward the radial center, the second slider drives the cone sleeve to move and squeeze the axial spring, and the radial spring applies a force to the first slider to move the first slider toward the radial center, thereby tightening the tile; when the material roll completely passes over the second slider, the second slider moves to the extreme positions on both sides, and the axial spring drives the cone sleeve to move and squeeze the first slider, so that the tile expands.

2. The mechanical expansion shaft for fixing a coil according to claim 1, characterized in that: There are a plurality of first sliding blocks, and the plurality of first sliding blocks are evenly distributed along the circumference of the support shaft, and the number of the tiles is the same as the number of the first sliding blocks.

3. The mechanical expansion shaft for fixing a coil according to claim 2, characterized in that: Two cylindrical bosses are arranged on the outer wall of each wedge-shaped sliding block, an inner threaded hole is arranged at one end of the cylindrical boss close to the tile, and the cylindrical boss is connected to the tile by bolts.

4. The mechanical expansion shaft for fixing a coil according to claim 3, characterized in that: A through hole is arranged on the side wall of the sleeve for allowing the cylindrical boss to pass through, and the diameter of the radial spring is larger than the diameter of the through hole.

5. The mechanical expansion shaft for fixing a coil according to claim 1, characterized in that: The diameter of one end of the cone sleeve close to the first sliding block is smaller than the diameter of one end close to the bottom cover.

6. The mechanical expansion shaft for fixing a coil according to claim 1, characterized in that: The connecting mechanism is a connecting rod mechanism or a cam mechanism.

7. The mechanical expansion shaft for fixing a coil according to claim 1, characterized in that: The surface of the tile is subjected to anti-slip treatment.

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