Speed-sensitive clutch device and paper roll box

Abstract

The present invention belongs to the technical field of transmission structures and daily necessities, and specifically relates to a speed-sensitive clutch device and a paper roll box. The speed-sensitive clutch device includes a cover tube, an inner core, a first rotating shaft and a non-Newtonian fluid; a plurality of first blocking parts are distributed on the inner wall of the cover tube, the inner core can be rotatably arranged in the cover tube, and the circumference of the inner core has a plurality of second blocking parts, one end of the first rotating shaft is connected to the inner core and the other end extends from the end of the cover tube, and the non-Newtonian fluid is filled in the gap between the cover tube and the inner core. The overall structure of the speed-sensitive clutch device is simple and reliable. The torque transmitted is adjusted by changing the rotation speed. The torque transmitted can be continuously modulated within a wide range, and the device has good smoothness and will not produce obvious shaking and noise when used. On this basis, a paper roll box is also provided, which has the advantages of safe and convenient operation.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission structures and daily necessities, and particularly relates to a speed-sensitive clutch device and a paper roll box. Background Art

[0002] In modern production and life, relative rotational motion is a ubiquitous form of motion, including relative rotation between rotating parts and stationary parts, as well as relative rotation between rotating parts. Therefore, regulating rotational motion has a very wide practical demand in modern production and life.

[0003] Taking the transmission structure as an example, it is often necessary to control the power connection state between the power output end and the power input end. In order to achieve switching between the power connection state and the power separation state, the more common method is to connect the electromagnetic clutch or the mechanical clutch in series in the power transmission path. For example, the solution adopted by patent CN113074480B when controlling the opening and closing of the refrigerator door changes the power connection state by manipulating the clutch. Among the clutches, the mechanical clutch relies on a purely mechanical structure for switching, which has the advantages of reliable structure and direct power transmission. However, due to the inherent characteristics of the mechanical structure, there is a noticeable sense of stagnation and high noise during the switching process, and it is difficult to achieve multi-level modulation and continuous modulation. The electromagnetic clutch controls the separation and connection of the friction plate by changing the magnetic field of the coil to achieve power switching. Although the switching process is smoother than the mechanical clutch, it has problems such as high cost, insufficient clutch force, and low stability. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention provides a speed-sensitive clutch device. This device is speed-sensitive and can adjust the amount of torque transmitted over a wide range by varying the relative rotational speed between the two power components. At low speeds, almost no torque is transmitted, while at high speeds, high torque can be transmitted efficiently, thereby achieving power switching and stepless regulation. Furthermore, the speed-sensitive clutch device provides different damping at different speeds. Based on this, the present invention also provides a paper roll box that is very easy to operate with one hand.

[0005] The speed-sensitive clutch device provided by the present invention comprises:

[0006] The cover cylinder has a receiving chamber inside, and a plurality of first blocking portions are distributed on the inner wall of the cover cylinder;

[0007] The inner core is rotatably disposed in the cover cylinder, and the circumferential side of the inner core has a plurality of second blocking portions; and when the inner core rotates, the second blocking portion does not contact the first blocking portion;

[0008] A first rotating shaft; one end of the first rotating shaft is connected to the inner core and rotates synchronously with the inner core, and the other end of the first rotating shaft extends from the end of the cover cylinder;

[0009] Non-Newtonian fluid; the non-Newtonian fluid fills the gap between the cover cylinder and the inner core; when the inner core rotates relative to the cover cylinder, the non-Newtonian fluid serves as a medium for transmitting torque.

[0010] Furthermore, the cover tube is cylindrical as a whole, the first blocking portion is a convex strip distributed in a ring array on the inner wall of the cover tube, and the extension direction of the first blocking portion is parallel to the rotation axis direction of the inner core.

[0011] Furthermore, the second blocking portions are convex strips distributed in an annular array on the outer periphery of the inner core, and an extending direction of the second blocking portions is parallel to the rotation axis direction of the inner core.

[0012] Furthermore, the cross-sections of the first blocking portion and the second blocking portion are both trapezoidal.

[0013] Furthermore, a second rotating shaft is fixed on the cover cylinder. The second rotating shaft is located on a side opposite to the first rotating shaft, and the second rotating shaft and the first rotating shaft are on the same axis.

[0014] The paper roll box provided by the present invention comprises the above-mentioned speed-sensitive clutch device, a box body and a rotating bracket; the cover cylinder is fixed on the inner wall of the box body, and the rotating bracket is fixed on the first rotating shaft.

[0015] Furthermore, the rotating bracket includes a main shaft coaxially fixed on the first rotating shaft and a group of support rods vertically fixed on the main shaft.

[0016] Furthermore, the bottom of the box body is opened for drawing out the roll of paper, and the first rotating shaft is arranged horizontally.

[0017] Furthermore, one side of the box body has an openable side panel, and the side panel is located on the side indicated by the first rotating shaft.

[0018] Beneficial Effects: Compared to existing technologies, the speed-sensitive clutch device provided by the present invention has a very simple and reliable overall structure. By varying the speed to adjust the transmitted torque, the transmitted torque can be continuously modulated over a wide range. The device also offers excellent smoothness, without noticeable vibration or noise during use. Furthermore, the paper roll box provided by the present invention is very easy to operate, controlling whether the paper roll is disconnected by varying the pulling speed, making it safer and more convenient than traditional paper roll boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the external structure of the speed-sensitive clutch device described in Example 1.

[0020] Figure 2 This is a schematic explosion diagram of the speed-sensitive clutch device described in Example 1.

[0021] Figure 3 Schematic diagram of the internal structure of the speed-sensitive clutch device described in Example 1.

[0022] Figure 4 This is a schematic structural diagram of the paper roll box described in Example 2.

[0023] Figure 5 Schematic diagram of the explosion of the speed-sensitive clutch device in Example 2.

[0024] Figure 6 Schematic diagram of the coordination between the speed-sensitive clutch device and the rotating bracket in Example 2.

[0025] Figure 7 This is a schematic diagram of the cooperation between the roll paper box and the roll paper described in Example 2.

[0026] In the figure, the cover tube 11 , the first blocking portion 111 , the inner core 12 , the second blocking portion 121 , the first rotating shaft 13 , the second rotating shaft 14 , the box body 2 , the rotating bracket 3 , the main shaft 31 , the support rod 32 , and the side plate 21 . DETAILED DESCRIPTION

[0027] The present invention is further illustrated by the following examples, which are intended to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the present invention.

[0028] Unless otherwise defined, technical or scientific terms used in this disclosure should be understood to have the ordinary meanings understood by persons of ordinary skill in the art. The terms "first," "second," and similar expressions used in this disclosure do not denote any order, quantity, or importance, but are simply used to distinguish different components. Terms such as "include" or "comprising" mean that the elements or objects preceding the term include the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Example 1

[0030] like Figures 1 to 3 The speed-sensitive clutch device shown includes:

[0031] The cover tube 11 has a receiving chamber inside, and a plurality of first blocking portions 111 are distributed on the inner wall of the cover tube 11;

[0032] The inner core 12 is rotatably disposed in the cover tube 11, and the circumferential side of the inner core 12 has a plurality of second blocking portions 121; and when the inner core 12 rotates, the second blocking portion 121 does not contact the first blocking portion 111;

[0033] One end of the first rotating shaft 13 is connected to the inner core 12 and rotates synchronously with the inner core 12, and the other end of the first rotating shaft 13 extends from the end of the cover tube 11;

[0034] Non-Newtonian fluid; the non-Newtonian fluid is filled in the gap between the cover cylinder 11 and the inner core 12; when the inner core 12 rotates relative to the cover cylinder 11, the non-Newtonian fluid acts as a medium for transmitting torque.

[0035] In the above-mentioned speed-sensitive clutch device, the shear thickening characteristics of the non-Newtonian fluid are utilized to fill the gap between the cover tube 11 and the inner core 12. When the relative rotation speed between the cover tube 11 and the inner core 12 is low, the shear effect of the non-Newtonian fluid is weak and can only transmit very low torque; when the relative rotation speed between the cover tube 11 and the inner core 12 is high, the shear effect of the non-Newtonian fluid is significantly improved, and a large torque can be transmitted.

[0036] When the above-mentioned speed-sensitive clutch device is used as a transmission component, it is only necessary to adjust the rotational speed of the active end to adjust the output torque of the driven end within a relatively large range, and the minimum output torque can be close to zero, achieving a state of power separation. Since the torque is transmitted through a non-rigid medium, it has good smoothness during adjustment and no obvious shaking or noise will occur. In addition, the above-mentioned speed-sensitive clutch device can also be used as a damping member and a buffer member. For example, if the cover tube 11 is fixed, the resistance to the rotation of the inner core 12 will spontaneously change with the different rotational speeds of the inner core 12. When the inner core 12 rotates slowly, the resistance is extremely small, and when the inner core 12 rotates faster, the resistance increases significantly.

[0037] like Figure 2 As shown, the housing 11 is cylindrical in shape and has a split structure, including a main body and an end cap. After the internal structure is installed, the main body and the end cap are sealed to prevent the non-Newtonian fluid from escaping. In addition, the first rotating shaft 13 is connected to the housing 11 at the point where it passes through the housing 11 via a sealed bearing to prevent the non-Newtonian fluid from escaping from the rotating connection.

[0038] When filling the non-Newtonian fluid, it is preferred that the non-Newtonian fluid does not completely fill the gap between the cover tube 11 and the inner core 12, but leaves a small amount of space. When the non-Newtonian fluid changes in volume due to shear heating, the small amount of space left is sufficient to accommodate the volume change and prevent the cover tube from being damaged.

[0039] like Figure 3As shown, the first blocking portion 111 is a convex strip distributed in an annular array on the inner wall of the cover cylinder 11, and the extension direction of the first blocking portion 111 is parallel to the rotation axis direction of the inner core 12. The second blocking portion 121 is a convex strip distributed in an annular array on the outer periphery of the inner core 12, and the extension direction of the second blocking portion 121 is parallel to the rotation axis direction of the inner core 12. The first blocking portion 111 can limit the flow of the non-Newtonian fluid near the inner wall of the cover cylinder 11, and the second blocking portion 121 can limit the flow of the non-Newtonian fluid near the outer wall of the inner core 12. Therefore, when the cover cylinder 11 and the inner core 12 rotate relative to each other, the shearing effect is mainly concentrated in the thinner layer of non-Newtonian fluid between the cover cylinder 11 and the inner core 12, forming a stronger shearing effect, which is beneficial to improving transmission efficiency and reducing energy loss.

[0040] Preferably, the cross-sections of the first blocking portion 111 and the second blocking portion 121 are both trapezoidal.

[0041] As a further improvement, a second rotating shaft 14 is fixed to the cover cylinder 11 . The second rotating shaft 14 is located on a side opposite to the first rotating shaft 13 , and the second rotating shaft 14 and the first rotating shaft 13 are on the same axis.

[0042] Example 2

[0043] like Figure 4 The paper roll box shown in FIG. includes a speed-sensitive clutch device. The speed-sensitive clutch device is as shown in FIG. Figure 5 Shown, including:

[0044] The cover tube 11 has a receiving chamber inside, and a plurality of first blocking portions 111 are distributed on the inner wall of the cover tube 11;

[0045] The inner core 12 is rotatably disposed in the cover tube 11, and the circumferential side of the inner core 12 has a plurality of second blocking portions 121; and when the inner core 12 rotates, the second blocking portion 121 does not contact the first blocking portion 111;

[0046] One end of the first rotating shaft 13 is connected to the inner core 12 and rotates synchronously with the inner core 12, and the other end of the first rotating shaft 13 extends from the end of the cover tube 11;

[0047] Non-Newtonian fluid; the non-Newtonian fluid is filled in the gap between the cover cylinder 11 and the inner core 12; when the inner core 12 rotates relative to the cover cylinder 11, the non-Newtonian fluid acts as a medium for transmitting torque.

[0048] The cover tube 11 is cylindrical in shape. The first blocking portions 111 are convex strips distributed in an annular array on the inner wall of the cover tube 11, and the extension direction of the first blocking portions 111 is parallel to the rotation axis of the inner core 12. The second blocking portions 121 are convex strips distributed in an annular array on the outer circumference of the inner core 12, and the extension direction of the second blocking portions 121 is parallel to the rotation axis of the inner core 12. The cross-sections of the first blocking portions 111 and the second blocking portions 121 are both trapezoidal.

[0049] The paper roll box further includes a box body 2 and a rotating bracket 3 ; the cover cylinder 11 is fixed on the inner wall of the box body 2 , and the rotating bracket 3 is fixed on the first rotating shaft 13 .

[0050] In the above-mentioned paper roll box, the rotating bracket 3 is used to fix the paper roll. When the paper roll is slowly pulled, the non-Newtonian fluid between the cover tube 11 and the inner core 12 produces a weak shearing effect, so the rotational resistance of the rotating bracket 3 is small, and the paper roll can be pulled out continuously. When the paper roll needs to be disconnected, it is only necessary to pull the paper roll quickly. At the moment of pulling, a faster relative movement is generated between the cover tube 11 and the inner core 12, causing the non-Newtonian fluid to thicken in response, resulting in a sharp increase in the rotational resistance, thereby breaking the paper roll. The above-mentioned paper roll box is very convenient to operate. It can be operated with one hand without contacting the box body. It only needs to change the pulling speed to control whether the paper roll is broken. Therefore, compared with the traditional supply box with serrations at the opening to cut the paper roll, this paper roll box has the advantages of being safer and more convenient to use.

[0051] like Figure 6 As shown, the rotating bracket 3 includes a main shaft 31 coaxially fixed to the first rotating shaft 13 and a set of support rods 32 perpendicularly fixed to the main shaft 31. When in use, the rotating bracket 3 extends into the through hole in the center of the paper roll. The length of the support rods 32 can be slightly larger than the diameter of the through hole, so that they abut against the inner wall of the through hole and clamp the paper roll.

[0052] like Figure 7 As shown, the bottom of the box body 2 is opened for the roll of paper to be drawn out, and the first rotating shaft 13 is arranged horizontally.

[0053] like Figure 7 As shown, one side of the box body 2 has an openable side panel 21, and the side panel 21 is located on the side indicated by the first rotating shaft 13, so as to facilitate the replacement of the roll paper.

[0054] The above embodiments are exemplary and intended to illustrate the technical concepts and features of the present invention so that those skilled in the art can understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A roll paper box, characterized in that: It includes a speed-sensitive clutch device, a box body (2) and a rotating bracket (3); The speed-sensitive clutch device comprises: A cover cylinder (11); the cover cylinder (11) has an accommodating chamber inside, and a plurality of first blocking portions (111) are distributed on the inner wall of the cover cylinder (11); An inner core (12); the inner core (12) is rotatably disposed in the cover cylinder (11); a circumferential side of the inner core (12) has a plurality of second blocking portions (121); and when the inner core (12) rotates, the second blocking portions (121) do not contact the first blocking portions (111); a first rotating shaft (13); one end of the first rotating shaft (13) is connected to the inner core (12) and rotates synchronously with the inner core (12), and the other end of the first rotating shaft (13) extends from the end of the cover cylinder (11); A non-Newtonian fluid; the non-Newtonian fluid is filled in the gap between the cover cylinder (11) and the inner core (12); when the inner core (12) rotates relative to the cover cylinder (11), the non-Newtonian fluid serves as a medium for transmitting torque; The cover cylinder (11) is fixed on the inner wall of the box body (2), and the rotating bracket (3) is fixed on the first rotating shaft (13); The lower side of the box body (2) is opened for drawing out the roll of paper, and the first rotating shaft (13) is arranged horizontally.

2. The roll paper box according to claim 1, characterized in that: One side of the box body (2) is provided with an openable side panel (21), and the side panel (21) is located on the side indicated by the first rotating shaft (13).

3. The roll paper box according to claim 2, characterized in that: The cover cylinder (11) is cylindrical in shape as a whole, the first blocking portion (111) is a convex strip distributed in an annular array on the inner wall of the cover cylinder (11), and the extension direction of the first blocking portion (111) is parallel to the rotation axis direction of the inner core (12).

4. The roll paper box according to claim 3, characterized in that: The second blocking portion (121) is a convex strip distributed in an annular array on the outer periphery of the inner core (12), and the extension direction of the second blocking portion (121) is parallel to the rotation axis direction of the inner core (12).

5. The roll paper box according to claim 4, characterized in that: The cross-sections of the first blocking portion (111) and the second blocking portion (121) are both trapezoidal.

6. The roll paper box according to claim 1, characterized in that: A second rotating shaft (14) is also fixed on the cover cylinder (11), and the second rotating shaft (14) is located on a side opposite to the first rotating shaft (13), and the second rotating shaft (14) and the first rotating shaft (13) are on the same axis.

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