阅读说明：本技术 一种热驱动柔性滚轮 (Thermally-driven flexible roller ) 是由 坎标 徐旺 龚柯健 于 2021-08-26 设计创作，主要内容包括：本发明公开一种热驱动柔性滚轮,所述热驱动柔性滚轮由7段首尾相连的弯曲元件构成,每段弯曲元件由TPU薄膜和PI薄膜组成,其中PI薄膜置于滚轮外测,TPU薄膜粘贴于滚轮内测。将柔性滚轮放置于高温平台上时,滚轮受热产生连续滚动。弯曲元件为7段时,滚轮可在40s内滚动50mm的距离,最大滚动速度可达1.6mm/s。(The invention discloses a thermally driven flexible roller which is composed of 7 sections of bending elements connected end to end, wherein each section of bending element is composed of a TPU film and a PI film, the PI film is arranged on the outer side of the roller, and the TPU film is adhered on the inner side of the roller. When the flexible roller is placed on the high-temperature platform, the roller is heated to continuously roll. When the bending element is 7 sections, the roller can roll for a distance of 50mm in 40s, and the maximum rolling speed can reach 1.6 mm/s.)

1. A thermally driven flexible roller is characterized in that the roller is composed of a plurality of sections of thermally driven bending elements, each section of thermally driven bending element comprises a PI film and a TPU film, and the PI film is annular and is arranged on the outer side of the roller; each section of the thermal driving bending element corresponds to one section of TPU film, each section of the TPU film is fixed on the inner side of the PI film, and the sections of the TPU films are connected end to end; the total length of the outer attaching surfaces of the multiple sections of TPU films is the same as the length of the inner attaching surface of the PI film, and each section of TPU film is of a rectangular structure with the same length.

2. The thermally driven flexible roller as claimed in claim 1, wherein the PI film has a thickness of 0.04 to 0.06mm and a width of 10 to 15 mm.

3. A thermally driven flexible roller as set forth in claim 1 wherein each segment of said TPU film has a thickness of 0.3 to 0.6mm, a length of 30 to 40mm and a width of 10 to 15 mm.

4. A thermally driven flexible roller according to any one of claims 1 to 3, wherein each length of TPU film has the same width as the PI film.

5. The thermally driven flexible roller as claimed in claim 1, wherein the PI film is a one-piece ring disposed outside the roller.

6. The thermally driven flexible roller as claimed in claim 1, wherein the PI film is formed in a circular ring shape by connecting a plurality of circular arcs end to end, and the arc lengths and the radii of the plurality of circular arcs are the same.

7. A thermally driven flexible roller as in claim 1 wherein said roller is comprised of 7 segments of thermally driven flexure elements, each segment of thermally driven flexure element being comprised of a PI film and a segment of TPU film, the 7 segments of TPU film being adhered end to the inside of the PI film.

8. The method of claim 1, comprising:

placing the roller on a high-temperature platform;

the leftmost end of the current front section thermal drive bending element on the roller is in contact with the high-temperature platform;

the high-temperature platform transfers heat to the section of the thermal driving bending element, the right end of the section of the thermal driving bending element is gradually bent downwards, and the next section of the thermal driving bending element connected with the section of the thermal driving bending element is pulled to enable the center of the roller to move rightwards;

when the contact state of the next section of thermally driven bending element and the high-temperature platform is the same as that of the previous section of thermally driven bending element, due to the heat conduction effect, the right end of the next section of thermally driven bending element is gradually bent downwards, the next section of thermally driven bending element connected with the next section of thermally driven bending element is pulled, and the process that the left end of each section of thermally driven bending element contacts the high-temperature platform, the right end of each section of thermally driven bending element is bent downwards and the next section of thermally driven bending element is pulled is repeated, so that the roller rolls continuously.

9. The method as claimed in claim 8, wherein the high temperature stage has a temperature of 70 to 90 ℃.

10. The method as claimed in claim 8, wherein the roller is formed of 7 segments of thermally driven bending members, each segment of thermally driven bending member is formed of a PI film and a TPU film, the PI film is disposed outside the roller, and the 7 segments of TPU films are bonded end to the inside of the PI film.

Technical Field

The invention belongs to the field of flexible rollers, and particularly relates to a thermally driven flexible roller.

Background

The roller is widely applied in production and life due to the advantages of stability, labor saving and the like. Conventional rollers such as automobile wheels and bicycle wheels are usually powered by electric or mechanical means to transmit torque and thus obtain rolling power. However, in some special situations requiring light weight, micro size, no power source, etc., a new driving method is needed to drive the roller to move. The new driving mode also means that the roller needs to have a new structure different from the traditional structure.

China with publication number CN108484951B specially adapted to 9/22/2020 discloses a method for preparing a photo-thermal drive robot by using a photo-thermal response material, wherein a composite film of graphene oxide and gold nanorods is introduced on a polymethyl methacrylate film to obtain a double-layer film as a raw material film for preparing the robot, and a commercial optical disc photo-engraving optical drive is used for carrying out laser scanning modification on the composite film on the upper layer of the raw material film to obtain a patterned robot structure; during scanning, the laser completes photoreduction on to the optical driver area in the robot structure, so that the composite film in the areas obtains high absorbance and high thermal conductivity simultaneously, and forms a high-efficiency optical driver assembly together with the lower PMMA film. When the light source irradiates the robot for driving, the thermal expansion coefficient of the composite film in the reduced light driver area is far smaller than that of the PMMA film, so that the light driver assembly is quickly bent towards one side of the composite film, and the robot is driven to deform. The patent utilizes the photo-thermal characteristic of the composite film to drive the robot to deform, but cannot realize the rolling of the driving roller. Currently, no research is being searched for the use of thermal drives to effect roller scrolling.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a thermally driven flexible roller which is used for achieving the effect of driving the roller to move in special occasions requiring the roller to be light, miniature, without a self-contained power source and the like.

The invention is realized by the following technical scheme:

a thermally driven flexible roller is composed of a plurality of sections of thermally driven bending elements, each section of thermally driven bending element comprises a PI film and a TPU film, and the PI films are annular and arranged on the outer sides of the rollers; each section of the thermal driving bending element corresponds to one section of TPU film, each section of the TPU film is fixed on the inner side of the PI film, and the sections of the TPU films are connected end to end; the total length of the outer attaching surfaces of the multiple sections of TPU films is the same as the length of the inner attaching surface of the PI film, and each section of TPU film is of a rectangular structure with the same length.

In the technical scheme, the roller consists of a plurality of sections of thermally driven bending elements, and each section of thermally driven bending element consists of a PI film and a TPU film, so that the roller has the characteristic of flexibility; the PI film is arranged on the outer side of the roller, the TPU film is arranged on the inner side of the PI film and is of a sectional structure, the lengths of all sections of TPU films are the same, and a plurality of sections of TPU films are fixed in the PI film in an end-to-end mode, so that the roller consisting of a plurality of sections of bending elements is formed; when the technical scheme is in contact with a heat source, continuous rolling can be generated in a heat driving mode, the continuous rolling device does not need to be driven by a motor, does not need to be connected with a mechanical transmission device for driving, does not depend on a power supply, and has the advantages of simple structure, light weight, convenience in driving and the like.

Furthermore, the thickness of the PI film is 0.04-0.06 mm, and the width of the PI film is 10-15 mm.

Furthermore, the thickness of each section of TPU film is 0.3-0.6 mm, the length is 30-40 mm, and the width is 10-15 mm.

Further, the width of each section of the TPU film is the same as that of the PI film.

Furthermore, the PI film is an integrated ring and is arranged on the outer side of the roller.

Furthermore, the PI film is in a ring shape formed by connecting a plurality of sections of circular arcs end to end, and the arc lengths and the radii of the plurality of sections of circular arcs are the same.

Furthermore, the roller consists of 7 sections of thermally driven bending elements, each section of thermally driven bending element consists of a PI film and a section of TPU film, and the 7 sections of TPU films are connected end to end and are adhered to the inner side of the PI film.

The driving method of the thermal driving flexible roller comprises the following steps:

placing the roller on a high-temperature platform;

the leftmost end of the current front section thermal drive bending element on the roller is in contact with the high-temperature platform;

the high-temperature platform transfers heat to the section of the thermal driving bending element, the right end of the section of the thermal driving bending element is gradually bent downwards, and the next section of the thermal driving bending element connected with the section of the thermal driving bending element is pulled to enable the center of the roller to move rightwards;

when the contact state of the next section of thermally driven bending element and the high-temperature platform is the same as that of the previous section of thermally driven bending element, due to the heat conduction effect, the right end of the next section of thermally driven bending element is gradually bent downwards, the next section of thermally driven bending element connected with the next section of thermally driven bending element is pulled, and the process that the left end of each section of thermally driven bending element contacts the high-temperature platform, the right end of each section of thermally driven bending element is bent downwards and the next section of thermally driven bending element is pulled is repeated, so that the roller rolls continuously.

Further, the temperature of the high-temperature platform is 70-90 ℃.

Furthermore, the roller consists of 7 sections of thermally driven bending elements, each section of thermally driven bending element consists of a PI film and a section of TPU film, the PI film is arranged on the outer side of the roller, and the 7 sections of TPU films are connected end to end and are adhered to the inner side of the PI film.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a thermally driven flexible roller, which is formed by a plurality of sections of thermally driven bending elements, wherein each section of thermally driven bending element is formed by a PI film and a TPU film, so that the roller has the flexible characteristic; the PI film is arranged on the outer side of the roller, the TPU film is arranged on the inner side of the PI film and is of a sectional structure, the lengths of all sections of TPU films are the same, and a plurality of sections of TPU films are fixed in the PI film in an end-to-end mode, so that the roller consisting of a plurality of sections of bending elements is formed; when the roller is in contact with a heat source, continuous rolling can be generated in a heat driving mode, the roller does not need to be driven by a motor or connected with a mechanical transmission device for driving, does not depend on a power supply, and has the advantages of simple structure, light weight, convenience in driving and the like.

Drawings

Fig. 1 is a schematic structural diagram of a thermally driven flexible roller according to an embodiment of the present invention.

FIG. 2 is a graphical representation of the rolling speed of a thermally driven flexible roller in accordance with an embodiment of the present invention as a function of time.

In the figure: PI film; 2. a high temperature stage; 3, TPU film; 4. a thermally driven bending element; 5. the next stage thermally drives the bending element.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

As shown in fig. 1, the present embodiment provides a thermally driven flexible roller consisting of 7 segments of thermally drivable bending elements.

The bending element consists of a PI film 1 and a TPU film 3. The PI film 1 is in a ring shape with the thickness of 0.05mm and the width of 12.5mm and is positioned outside the roller.

Each section of TPU film 3 is a rectangle with the thickness of 0.4mm, the length of 35mm and the width of 12.5 mm.

The total length of the outer attaching surfaces of the 7 sections of TPU films 3 is equal to the length of the whole section of the inner attaching surface of the PI film 1. The TPU film 3 is connected end to end and stuck on the inner side of the PI film 1 to form a heat-driven flexible roller structure. Each section of TPU film 3 forms with the associated PI film 1 locally the thermally driven bending element of the roller, for a total of 7 sections.

The driving mode is that the thermal driving flexible roller is placed on the high-temperature platform 2, and the leftmost end of a certain section of bending element 4 on the roller is in contact with the high-temperature platform 2. Since the high temperature platform 2 has a heat transfer effect on the section of the bending element 4, the right end of the section of the bending element 4 is gradually bent downwards, so that the connected next section of the bending element 5 is pulled, and the gravity center of the roller is moved to the right. When the next stage of the bending element 5 on the roller is in contact with the hot platform in the same state as the previous bending element 4, the next stage of the bending element 5 generates a heat driving action due to the same principle, thereby continuously rolling the roller forward.

As shown in FIG. 2, the thermally driven flexible roller was measured to roll for a distance of 50mm within 40s at a driving temperature of 80 ℃, and the maximum rolling speed reached 1.6 mm/s.

Example 2

Different from the embodiment 1, in the embodiment, the PI film is formed in a ring shape by connecting a plurality of circular arcs end to end, and the arc lengths and the radii of the plurality of circular arcs are the same. Each arc PI film corresponds to one section of TPU film to form a bending element capable of being driven by heat, and the multiple sections of bending elements are connected end to form a flexible roller capable of being driven by heat.

Example 3

The embodiment provides a driving method of a thermally driven flexible roller, which comprises the following steps:

placing a roller on a high-temperature platform, wherein the roller is composed of 7 sections of thermally driven bending elements, each section of thermally driven bending element is composed of a PI film and a section of TPU film, the PI film is arranged on the outer side of the roller, and the 7 sections of TPU films are connected end to end and are adhered to the inner side of the PI film;

the leftmost end of the current front section thermal drive bending element on the roller is in contact with the high-temperature platform;

the high-temperature platform transfers heat to the section of the thermal driving bending element, the right end of the section of the thermal driving bending element is gradually bent downwards, and the next section of the thermal driving bending element connected with the section of the thermal driving bending element is pulled to enable the center of the roller to move rightwards;

when the contact state of the next section of thermally driven bending element and the high-temperature platform is the same as that of the previous section of thermally driven bending element, due to the heat conduction effect, the right end of the next section of thermally driven bending element is gradually bent downwards, the next section of thermally driven bending element connected with the next section of thermally driven bending element is pulled, and the process that the left end of each section of thermally driven bending element contacts the high-temperature platform, the right end of each section of thermally driven bending element is bent downwards and the next section of thermally driven bending element is pulled is repeated, so that the roller rolls continuously.

In this embodiment, the temperature of the high temperature platform is 70 ℃ to 90 ℃, preferably 80 ℃.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.