Rotating shaft positioning limiting mechanism, rotating device and rotating screen

Abstract

The application belongs to the technical field of mechanical transmission structure, and particularly relates to a rotating shaft positioning and limiting mechanism, a rotating device and a rotating screen. The rotating shaft positioning and limiting mechanism comprises a support, a driving motor, a screw rod, a first clamping piece, a second clamping piece and a first elastic piece. The driving motor is fixedly installed on the support. The screw rod is rotatably installed on the support. The driving motor is connected with the screw rod. The screw rod is provided with a first thread. One end of the first clamping piece or one end of the second clamping piece is screwed on the first thread. The other end of the first clamping piece and the other end of the second clamping piece both extend along the same side of the radial direction of the screw rod. An accommodating space formed between the first clamping piece and the second clamping piece is used for accommodating the rotating shaft. The first elastic piece applies a reset elastic force to the first clamping piece or the second clamping piece screwed on the first thread, so that the first clamping piece and the second clamping piece clamp and position the rotating shaft. The application solves the problem that the damping limitation of the rotating shaft in the prior art is easy to fail, resulting in the problem of the rotating shaft slipping.

Description

Technical Field

[0001] This invention belongs to the field of mechanical transmission structure technology, and particularly relates to a shaft positioning and limiting mechanism, a rotating device, and a rotating screen. Background Technology

[0002] In existing technologies, friction damping rubber rings are generally used to dampen and limit the rotation of a shaft. The rubber ring is fitted onto the shaft and then installed into a shaft hole. The shaft hole compresses the rubber ring, causing it to deform and thus applying a damping force to the shaft, thereby limiting its rotation. However, the damping force of the rubber ring is always limited. When the shaft is subjected to a large external torque, it is still prone to slippage. Moreover, after prolonged use, the damping effect of the rubber ring can easily fail, leading to shaft slippage and making it impossible to stably and effectively limit the rotation of the shaft. Summary of the Invention

[0003] The purpose of this invention is to provide a rotating shaft positioning and limiting mechanism, a rotating device, and a rotating screen, in order to solve the problem that the damping and limiting of the rotating shaft in the prior art is prone to failure, resulting in the rotating shaft slipping.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a rotating shaft positioning and limiting mechanism, comprising:

[0005] support;

[0006] The drive motor is fixedly mounted on the bracket.

[0007] A lead screw is rotatably mounted on a bracket, a drive motor is connected to the lead screw, and the lead screw has a first thread;

[0008] The first clamp and the second clamp, one end of the first clamp or one end of the second clamp is screwed to the first thread, the other ends of the first clamp and the other ends of the second clamp both extend along the same side of the radial direction of the lead screw, and the receiving space formed between the first clamp and the second clamp is used to receive the rotating shaft.

[0009] The first elastic element applies a reset elastic force to the first or second clamping piece screwed to the first thread, so that the first and second clamping pieces clamp the positioning shaft.

[0010] The technical solution of this invention has at least the following beneficial effects: The rotating shaft is clamped and positioned using the shaft positioning and limiting mechanism provided by this invention. During assembly, the rotating shaft passes through the receiving space formed between the first clamp and the second clamp. When the rotating shaft needs to rotate, the drive motor outputs power to drive the lead screw to rotate. Since one end of the first or second clamp is screwed to the first thread of the lead screw, the lead screw drives the first or second clamp to overcome the elastic potential energy of the first elastic element. The rotation of the lead screw is converted into linear movement of the first or second clamp along the axis of the lead screw, thus expanding the receiving space between the first and second clamps, thereby loosening the rotating shaft and allowing it to rotate freely. When the drive motor stops working, the elastic potential energy of the first elastic element can overcome the resistance of the drive motor, causing the lead screw to rotate in the opposite direction. This causes the first or second clamp to move linearly along the axis of the lead screw, reducing the receiving space between the first and second clamps, thereby clamping the rotating shaft, positioning it, and stopping its rotation. The shaft positioning and limiting mechanism provided by this invention can more stably position the shaft, reducing the possibility of shaft positioning failure, decreasing the frequency of shaft slippage, and improving the reliability of shaft positioning compared to the prior art.

[0011] In one embodiment, the lead screw is further provided with a second thread and a second elastic element. The direction of rotation of the second thread is opposite to that of the first thread. One end of the first clamping piece and the second clamping piece that is not screwed to the first thread is screwed to the second thread. The second elastic element applies a restoring force to the first or second clamping piece screwed to the second thread, so that the first and second clamping pieces move closer to each other and clamp the positioning shaft. Applying this technical solution has at least the following beneficial effects: the shaft positioning and limiting mechanism provided in this embodiment clamps and positions the shaft. During assembly, the shaft passes through the receiving space formed between the first and second clamping pieces. When the shaft needs to rotate, the drive motor outputs power to drive the lead screw to rotate. Since one end of the first clamp is screwed to the first thread of the lead screw, and one end of the second clamp is screwed to the second thread, and the direction of rotation of the second thread is opposite to that of the first thread, the lead screw drives the first clamp to overcome the elastic potential energy of the first elastic element, and the lead screw drives the second clamp to overcome the elastic potential energy of the second elastic element. The rotation of the lead screw is converted into linear movement of the first and second clamps along the axis of the lead screw, moving them away from each other. This causes the first and second clamps to move away from each other, thereby expanding the accommodating space and releasing the shaft, allowing it to rotate freely. When the drive motor stops working, the elastic potential energy of the first and second elastic elements can overcome the resistance of the drive motor, causing the lead screw to rotate in the opposite direction. This causes the first and second clamps to move linearly along the axis of the lead screw, moving them closer to each other. This causes the first and second clamps to move closer to each other, thereby reducing the accommodating space and clamping the shaft, positioning it, and stopping its rotation. The shaft positioning and limiting mechanism provided by this invention can more stably position the shaft, reducing the possibility of shaft positioning failure, decreasing the frequency of shaft slippage, and improving the reliability of shaft positioning compared to the prior art.

[0012] In one embodiment, both the first and second elastic elements are compression springs. The first elastic element is disposed between the bracket and the first clamping piece screwed to the first thread, with both ends of the first elastic element abutting against the bracket and the first clamping piece, respectively. The second elastic element is disposed between the bracket and the second clamping piece screwed to the second thread, with both ends of the second elastic element abutting against the bracket and the second clamping piece, respectively. The first elastic element applies a reset force to the first clamping piece, and the second elastic element applies a reset force to the second clamping piece, so that the first and second clamping pieces move closer together to clamp and position the rotating shaft. Alternatively, both the first and second elastic elements are tension springs, connected together. The end of the first elastic element away from the second elastic element is connected to the first clamping piece, and the end of the second elastic element away from the first elastic element is connected to the second clamping piece. The first and second elastic elements apply tension to the first and second clamping pieces, respectively, so that the first and second clamping pieces move closer together to clamp and position the rotating shaft.

[0013] In one embodiment, the first thread and / or the second thread are multi-start threads.

[0014] In one embodiment, the pivot positioning and limiting mechanism further includes a first fixed shaft and a second fixed shaft. Both the first fixed shaft and the second fixed shaft are fixedly disposed relative to the bracket. The first fixed shaft and the second fixed shaft are arranged parallel to each other, and the axes of the first fixed shaft and the second fixed shaft are both perpendicular to the axis of the lead screw. The end of the first clamp away from the lead screw is rotatably mounted on the first fixed shaft, and the end of the second clamp away from the lead screw is rotatably mounted on the second fixed shaft. Both the first clamp and the second clamp are flexible components.

[0015] In one embodiment, the first clip has a first arc-shaped segment that bends toward a direction away from the second clip, and the second clip has a second arc-shaped segment that bends toward a direction away from the first clip. The first arc-shaped segment and the second arc-shaped segment are arranged opposite to each other to form a receiving space for accommodating the rotating shaft.

[0016] In one embodiment, anti-slip textures are provided on the two opposite sidewalls of the first arc segment and the second arc segment.

[0017] In one embodiment, the shaft positioning and limiting mechanism further includes a transmission structure, which has an input end and an output end. The output shaft of the drive motor is driven and connected to the input end, and the output end is connected to the lead screw. The transmission structure is used to reduce the speed and increase the torque of the mechanical power output by the output shaft of the drive motor and transmit it to the lead screw.

[0018] According to another aspect of the present invention, a rotating device is provided. Specifically, the rotating device includes:

[0019] Control module;

[0020] case;

[0021] The power assembly is mounted in the housing and is electrically connected to the control module.

[0022] A rotating shaft is rotatably mounted on the housing, and the power output end of the power assembly is connected to the rotating shaft drive.

[0023] As described above, in the shaft positioning and limiting mechanism, the drive motor is electrically connected to the control module. The shaft passes through the receiving space formed by the first clamp and the second clamp. When the control module drives the shaft to rotate, it controls the drive motor to drive the lead screw to rotate so as to cause the first clamp and the second clamp to release the shaft. When the control module stops rotating, it controls the drive motor to be de-energized.

[0024] According to another aspect of the present invention, a rotating screen is provided. Specifically, the rotating screen includes a screen and a rotating device as described above, with one side of the screen fixedly mounted on a rotating shaft, and the screen rotating synchronously with the rotating shaft. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art 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.

[0026] Figure 1 This is a schematic diagram of the structure of the rotating shaft positioning and limiting mechanism that limits the rotating shaft according to Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the assembly structure of the rotating shaft positioning and limiting mechanism according to Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the assembly structure of the rotating shaft positioning and limiting mechanism according to Embodiment 1 of the present invention after the first elastic element and the second elastic element have been disassembled.

[0029] Figure 4 This is a schematic diagram of the lead screw of the rotating shaft positioning and limiting mechanism according to Embodiment 1 of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the first clamping piece of the rotating shaft positioning and limiting mechanism according to Embodiment 1 of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the first clamping piece of the rotating shaft positioning and limiting mechanism in Embodiment 2 of the present invention;

[0032] Figure 7 This is a schematic diagram of the assembly structure of the rotating shaft positioning and limiting mechanism according to Embodiment 3 of the present invention;

[0033] Figure 8 This is a schematic diagram of the assembly structure of the rotating device according to an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the assembly structure of a rotating screen from a first perspective according to an embodiment of the present invention, wherein the screen is in an open state;

[0035] Figure 10 This is a schematic diagram of the assembly structure of the rotating screen from a second perspective according to an embodiment of the present invention, wherein the screen is in an open state;

[0036] Figure 11 for Figure 10 The enlarged view of point A on the rotating screen shown.

[0037] The following are the labeling elements in the figure:

[0038] 10. Bracket;

[0039] 20. Drive motor;

[0040] 30. Lead screw; 31. First thread; 32. Second thread; 33. Connector;

[0041] 40. Accommodation space; 41. First clamping piece; 411. First threaded hole; 412. First clear hole; 413. First arc-shaped segment; 414. Anti-slip texture; 42. Second clamping piece;

[0042] 51. First elastic element; 52. Second elastic element;

[0043] 60. Transmission structure;

[0044] 71. First bearing; 72. Second bearing;

[0045] 81. First fixed shaft; 82. Second fixed shaft;

[0046] 90. Shaft;

[0047] 100. Screen; 101. Mounting bracket; 102. Receiving slot;

[0048] 110. Housing; 120. Power assembly. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Example 1:

[0054] like Figures 1 to 5 As shown, Embodiment 1 of the present invention provides a rotating shaft positioning and limiting mechanism. Specifically, the rotating shaft positioning and limiting mechanism includes a bracket 10, a drive motor 20, a lead screw 30, a first clamping plate 41, a second clamping plate 42, a first elastic element 51, and a second elastic element 52. The drive motor 20 is fixedly mounted on the bracket 10, and the lead screw 30 is rotatably mounted on the bracket 10. The drive motor 20 is connected to the lead screw 30 to transmit power to the lead screw 30. The lead screw 30 is provided with a first thread 31 and a second thread 32. The direction of rotation of the second thread 32 is opposite to that of the first thread 31. One end of the first clamping plate 41 is provided with a first threaded hole 411, and one end of the second clamping plate 42 is provided with a second threaded hole (not shown). One of the first threaded hole 411 of the first clamping plate 41 and the second threaded hole of the second clamping plate 42 is screwed into the first thread 31. The other end of the first clamp 41 is screwed into the second thread 32 (hereafter, the first threaded hole 411 of the first clamp 41 is screwed into the first thread 31 and the second threaded hole of the second clamp 42 is screwed into the second thread 32 as an example). The other end of the first clamp 41 and the other end of the second clamp 42 both extend along the same side of the radial direction of the lead screw 30 (generally, it can be considered that the extension direction of the first clamp 41 and the extension direction of the second clamp 42 are both perpendicular to the axial direction of the lead screw). The receiving space 40 formed between the first clamp 41 and the second clamp 42 is used to receive the rotating shaft 90. The first elastic member 51 applies a reset elastic force to the first clamp 41 screwed into the first thread 31, and the second elastic member 52 applies a reset elastic force to the second clamp 42 screwed into the second thread 32, so that the first clamp 41 and the second clamp 42 move closer to each other to clamp and position the rotating shaft 90.

[0055] The rotating shaft 90 is clamped and positioned by the rotating shaft positioning and limiting mechanism of Embodiment 3 of the present invention. During assembly, the rotating shaft 90 passes through the receiving space 40 formed between the first clamping piece 41 and the second clamping piece 42. When the shaft 90 needs to rotate, the drive motor 20 outputs power to drive the lead screw 30 to rotate. Since one end of the first clamping piece 41 is screwed to the first thread 31 of the lead screw 30, and one end of the second clamping piece 42 is screwed to the second thread 32, and the direction of rotation of the second thread 32 is opposite to that of the first thread 31, the lead screw 30 drives the first clamping piece 41 to overcome the elastic potential energy of the first elastic element 51, and the lead screw 30 drives the second clamping piece 42 to overcome the elastic potential energy of the second elastic element 52. The rotation of the lead screw 30 is converted into linear movement of the first clamping piece 41 and the second clamping piece 42 along the axial direction of the lead screw 30 and away from each other, so that the accommodating space 40 between the first clamping piece 41 and the second clamping piece 42 expands, thereby releasing the shaft 90. That is, the first clamping piece 41 and the second clamping piece 42 release the shaft 90, and the shaft 90 can rotate freely. When the drive motor 20 stops working, the elastic potential energy of the first elastic element 51 and the second elastic element 52 together overcomes the resistance of the drive motor 20, causing the lead screw 30 to rotate in the opposite direction. This causes the first clamping plate 41 and the second clamping plate 42 to move linearly along the axial direction of the lead screw 30 and move closer to each other. This reduces the accommodating space 40 between the first clamping plate 41 and the second clamping plate 42, thereby clamping the rotating shaft 90. In other words, the first clamping plate 41 and the second clamping plate 42 restrict the rotating shaft 90, preventing it from rotating and thus positioning the rotating shaft 90, stopping its rotation. The rotating shaft positioning and limiting mechanism provided by this invention can more stably position the rotating shaft 90. Compared with the prior art, it reduces the possibility of positioning failure of the rotating shaft 90, reduces the frequency of rotation of the rotating shaft 90, and improves the reliability of positioning the rotating shaft 90.

[0056] The first thread 31 and the second thread 32 are spaced apart on the lead screw 30. Alternatively, the first thread 31 and the second thread 32 may be arranged adjacent to each other on the lead screw 30.

[0057] like Figure 3 and Figure 4 As shown, the rotating shaft positioning and limiting mechanism also includes two bearings, namely a first bearing 71 and a second bearing 72. Both the first bearing 71 and the second bearing 72 are mounted on the bracket 10. The two ends of the lead screw 30 are respectively mounted on the first bearing 71 and the second bearing 72. The connector 33 of the lead screw 30 passes through the first bearing 71 and is connected to the drive motor 20. The lead screw 30, mounted to the bracket 10 via the first bearing 71 and the second bearing 72, can rotate more smoothly.

[0058] like Figure 1 and Figure 2As shown, in Embodiment 1 of the present invention, both the first elastic element 51 and the second elastic element 52 are compression springs. During assembly, the first elastic element 51 is disposed between the bracket 10 and the first clamping piece 41 screwed to the first thread 31, with both ends of the first elastic element 51 abutting against the bracket 10 and the first clamping piece 41, respectively; and the second elastic element 52 is disposed between the bracket 10 and the second clamping piece 42 screwed to the second thread 32, with both ends of the second elastic element 52 abutting against the bracket 10 and the second clamping piece 42, respectively. The first elastic element 51 applies a reset force to the first clamping piece 41, and the second elastic element 52 applies a reset force to the second clamping piece 42, so that the first clamping piece 41 and the second clamping piece 42 move closer to each other when the drive motor 20 stops driving the lead screw 30 to rotate (i.e., the drive motor 20 is de-energized at this time), thereby clamping and positioning the rotating shaft 90.

[0059] Alternatively, in other embodiments of Example 1, both the first elastic element 51 and the second elastic element 52 are tension springs. During assembly, the first elastic element 51 and the second elastic element 52 are connected to form a relatively long tension spring (or a single, complete tension spring can be used, in which case the length of the single tension spring is equal to the sum of the lengths of the first elastic element 51 and the second elastic element 52). The end of the first elastic element 51 away from the second elastic element 52 is connected to the first clamping plate 41, and the end of the second elastic element 52 away from the first elastic element 51 is connected to the second clamping plate 42. The first elastic element 51 and the second elastic element 52 apply tension to the first clamping plate 41 and the second clamping plate 42 respectively, so that the first clamping plate 41 and the second clamping plate 42 move closer to each other when the drive motor 20 stops driving the lead screw 30 to rotate (i.e., the drive motor 20 is de-energized at this time), thereby clamping and positioning the rotating shaft 90.

[0060] In Embodiment 1 of the present invention, both the first thread 31 and the second thread 32 can be multi-start threads, and the number of starts of the first thread 31 and the second thread 32 are equal (of course, the number of starts of the first thread 31 and the second thread 32 can also be unequal). Preferably, both the first thread 31 and the second thread 32 are four-start threads. The use of multi-start threads for both the first thread 31 and the second thread 32 reduces the self-locking property between the first thread 31 and the internal thread of the first threaded hole 411, and also reduces the self-locking property between the second thread 32 and the internal thread of the second threaded hole, making it easier for the first elastic element 51 and the second elastic element 52 to drive the first clamping piece 41 and the second clamping piece 42 to move towards each other along the axial direction of the lead screw 30.

[0061] Alternatively, in another embodiment of Example 1, the first thread 31 is a multi-start thread, while the second thread 32 is a single-start thread. Or, in yet another embodiment of Example 1, the first thread 31 is a single-start thread, while the second thread 32 is a multi-start thread.

[0062] like Figures 1 to 3As shown, the rotating shaft positioning and limiting mechanism also includes a first fixed shaft 81 and a second fixed shaft 82. Both the first fixed shaft 81 and the second fixed shaft 82 are fixedly disposed relative to the bracket 10, are parallel to each other, and their axes are perpendicular to the axis of the lead screw 30. A first light hole 412 is provided at the end of the first clamping piece 41 away from the lead screw 30, such as... Figure 5 As shown, the first aperture 412 is rotatably mounted on the first fixed shaft 81. The end of the second clamping piece 42 away from the lead screw 30 has a second aperture (not shown), which is rotatably mounted on the second fixed shaft 82. Both the first clamping piece 41 and the second clamping piece 42 are flexible components. During the opening and closing of the first clamping piece 41 and the second clamping piece 42, the first clamping piece 41 rotates around the first fixed shaft 81, and the second clamping piece 42 rotates around the second fixed shaft 82. Because the first clamping piece 41 is a flexible component, when the first threaded hole 411 moves linearly on the first thread 31, the first clamping piece 41 undergoes a certain amount of deflection deformation (and the deformation is small, controlled within the elastic deformation range of the first clamping piece 41). Therefore, there is no motion interference between the first clamping piece 41 and the lead screw 30, preventing movement. Similarly, the second clamping piece 42 rotates around the second fixed shaft 82. Since the second clamping piece 42 is a flexible component, when the second threaded hole moves linearly on the second thread 32, the second clamping piece 42 undergoes a certain amount of deflection deformation (and the deformation is small, controlled within the elastic deformation range of the second clamping piece 42). Therefore, there will be no motion interference between the second clamping piece 42 and the lead screw 30, preventing it from moving. Furthermore, the first fixed shaft 81 serves as the force fulcrum for the first clamping piece 41 to grip the rotating shaft 90, and the second fixed shaft 82 serves as the force fulcrum for the second clamping piece 42 to grip the rotating shaft 90. This allows the first clamping piece 41 and the second clamping piece 42 to stably grip the rotating shaft 90, thereby restricting the rotating shaft 90 and preventing it from rotating.

[0063] like Figure 5 As shown, the first clamping piece 41 has a first arc-shaped segment 413, which bends away from the second clamping piece 42. Correspondingly, the second clamping piece 42 has a second arc-shaped segment, which bends away from the first clamping piece 41. In this way, the first arc-shaped segment 413 and the second arc-shaped segment are arranged opposite each other to form a receiving space 40 for accommodating the rotating shaft 90. The receiving space 40 formed by the first arc-shaped segment 413 and the second arc-shaped segment can fit and conform more closely to the outer peripheral wall of the rotating shaft 90, thereby more stably holding the rotating shaft 90.

[0064] like Figures 1 to 3As shown, the shaft positioning and limiting mechanism also includes a transmission structure 60, which has an input end and an output end. The output shaft of the drive motor 20 is driven and connected to the input end, and the output end is connected to the lead screw 30. During the output of power by the drive motor 20, the transmission structure 60 is used to reduce the mechanical power output from the output shaft of the drive motor 20 and increase its torque before transmitting it to the lead screw 30. In fact, the transmission structure 60 used in this embodiment is equivalent to a speed reducer.

[0065] Example 2:

[0066] like Figure 6 The diagram shows a schematic representation of the structure of the first clamping piece of the pivot positioning and limiting mechanism according to Embodiment 2 of the present invention. Compared with the pivot positioning and limiting mechanism of Embodiment 1, the pivot positioning and limiting mechanism of Embodiment 2 has the following differences.

[0067] like Figure 6 As shown, anti-slip textures 414 are provided on the two opposite sidewalls of the first arc segment 413 and the second arc segment. In this way, the anti-slip textures 414 increase the friction between the first arc segment 413 and the second arc segment and the outer peripheral wall of the rotating shaft 90, thereby more stably gripping the rotating shaft 90 and preventing the rotating shaft 90 from rotating. This avoids the failure of the restriction on the rotating shaft 90 and effectively prevents the rotating shaft 90 from slipping.

[0068] Compared with the rotating shaft positioning and limiting mechanism of Embodiment 1, the rotating shaft positioning and limiting mechanism of Embodiment 2 is the same in all aspects except for the above-mentioned structural differences, and therefore will not be described again here.

[0069] Example 3:

[0070] like Figure 7 The diagram shows an assembly structure schematic of the rotating shaft positioning and limiting mechanism according to Embodiment 3 of the present invention. Compared with the rotating shaft positioning and limiting mechanism of Embodiment 1 or Embodiment 2, the rotating shaft positioning and limiting mechanism of Embodiment 3 has the following differences.

[0071] like Figure 7As shown, the shaft positioning and limiting mechanism provided in Embodiment 3 of the present invention includes a bracket 10, a drive motor 20, a lead screw 30, a first clamping piece 41, a second clamping piece 42, and a first elastic element 51. The drive motor 20 is fixedly installed on the bracket 10, and both ends of the lead screw 30 are rotatably installed on the bracket 10. The drive motor 20 is connected to the connector 33 of the lead screw 30. The lead screw 30 is only provided with a first thread 31, and the rest of the lead screw 30 is a smooth rod. In the shaft positioning and limiting mechanism of Embodiment 3, one end of the second clamping piece 42 is provided with a light hole. The light hole of the second clamping piece 42 is rotatably installed on the smooth rod of the lead screw 30, but the second clamping piece 42 cannot move linearly along the axial direction of the lead screw 30, and the side of the second clamping piece 42 facing the shaft 90 is basically attached to the shaft 90 but does not apply pressure to the shaft 90. One end of the first clamping piece 41 is screwed into the first thread 31 through the first thread hole 411. The other end of the first clamping piece 41 and the other end of the second clamping piece 42 both extend along the same side of the radial direction of the lead screw 30. A receiving space 40 for accommodating the rotating shaft 90 is formed between the first clamping piece 41 and the second clamping piece 42. The first elastic member 51 applies a reset elastic force to the first clamping piece 41 screwed into the first thread 31 so that the first clamping piece 41 and the second clamping piece 42 clamp and position the rotating shaft 90 so that the rotating shaft 90 cannot rotate. When the first clamp 41 applies pressure to the rotating shaft 90 under the restoring force of the first elastic member 51, the rotating shaft 90 will slightly shift towards the second clamp 42, causing the second clamp 42 and the rotating shaft 90 to press against each other and generate compression. Thus, as the first clamp 41 continues to apply pressure to the rotating shaft 90 under the restoring force of the first elastic member 51, the friction between the rotating shaft 90 and the first clamp 41, and between the rotating shaft 90 and the second clamp 42, restricts and positions the rotating shaft 90, preventing it from rotating and effectively preventing the rotating shaft 90 from slipping.

[0072] The rotating shaft 90 is clamped and positioned using the rotating shaft positioning and limiting mechanism of Embodiment 3 of the present invention. During assembly, the rotating shaft 90 passes through the receiving space 40 formed between the first clamping piece 41 and the second clamping piece 42. When the rotating shaft 90 needs to rotate, the drive motor 20 outputs power to drive the lead screw 30 to rotate. Since the first threaded hole 411 of the first clamping piece 41 is screwed into the first thread 31 of the lead screw 30, the lead screw 30 drives the first clamping piece 41 to overcome the elastic potential energy of the first elastic element 51. Therefore, the rotation of the lead screw 30 is converted into the first clamping piece 41 moving linearly along the axial direction of the lead screw 30 and away from the second clamping piece 42, thereby expanding the receiving space 40 between the first clamping piece 41 and the second clamping piece 42, thus releasing the rotating shaft 90. That is, the first clamping piece 41 and the second clamping piece 42 release the rotating shaft 90, and the rotating shaft 90 can rotate freely. When the drive motor 20 stops working, the elastic potential energy of the first elastic element 51 can overcome the resistance of the drive motor 20, thereby causing the lead screw 30 to rotate in the opposite direction. This causes the first clamping piece 41 to move linearly along the axial direction of the lead screw 30 and closer to the second clamping piece 42, reducing the accommodating space 40 between the first clamping piece 41 and the second clamping piece 42. This clamps the rotating shaft 90, meaning the first clamping piece 41 and the second clamping piece 42 restrict the rotating shaft 90, thus positioning the rotating shaft 90 and preventing it from rotating. The rotating shaft positioning and limiting mechanism provided by this invention can more stably position the rotating shaft 90. Compared with the prior art, it reduces the possibility of positioning failure of the rotating shaft 90, reduces the frequency of rotation of the rotating shaft 90, and improves the reliability of positioning the rotating shaft 90.

[0073] Compared with the rotating shaft positioning and limiting mechanism of Embodiment 1 or Embodiment 2, the rotating shaft positioning and limiting mechanism of Embodiment 3 is the same in all aspects except for the above-mentioned structural differences, and therefore will not be described again here.

[0074] According to another aspect of the invention, such as Figure 8As shown, a rotating device is provided. Specifically, the rotating device includes a control module (not shown), a housing 110, a power assembly 120, a rotating shaft 90, and a rotating shaft positioning and limiting mechanism as described above. The power assembly 120 is mounted on the housing 110 and is electrically connected to the control module. The rotating shaft 90 is rotatably mounted on the housing 110, and the power output end of the power assembly 120 is drivenly connected to the rotating shaft 90. The drive motor 20 of the rotating shaft positioning and limiting mechanism is electrically connected to the control module. The rotating shaft 90 passes through the receiving space 40 formed by the first clamping piece 41 and the second clamping piece 42. Specifically, the housing 110 has an installation space, and a reduction mechanism is provided in the installation space. The power output end of the power assembly 120 is drivenly connected to the input end of the reduction mechanism to achieve speed reduction and torque increase. Then, the output end of the reduction mechanism is drivenly connected to the connector 33 of the lead screw 30, thereby driving the lead screw 30 to rotate. When the control module controls the power assembly 120 to drive the rotating shaft 90 to rotate, the control module simultaneously controls the drive motor 20 to drive the lead screw 30 to rotate, thereby causing the first clamp 41 and the second clamp 42 to release the rotating shaft 90 (i.e., the control module controls the drive motor 20 to be energized), thus allowing the rotating shaft 90 to rotate freely. When the control module controls the power assembly 120 to stop rotating, that is, when the power assembly 120 stops driving the rotating shaft 90 and the rotating shaft 90 stops rotating, at the same time, the control module controls the drive motor 20 to be de-energized. In this way, one end of the first clamp 41 moves along the axis of the lead screw 30 under the action of the reset spring force of the first elastic member 51, and / or one end of the second clamp 42 moves along the axis of the lead screw 30 under the action of the reset spring force of the second elastic member 52, so that the first clamp 41 and the second clamp 42 clamp and position the rotating shaft 90, and the rotating shaft 90 cannot rotate.

[0075] The rotating device of the present invention uses a shaft positioning and limiting mechanism to position and limit the rotating shaft 90, which can more stably position the rotating shaft 90, reduce the possibility of positioning failure of the rotating shaft 90, reduce the frequency of the rotating shaft 90 slipping, and improve the reliability of positioning the rotating shaft 90. Furthermore, compared to existing technologies, where the rotating shaft 90 is typically braked and positioned using a brake block, driven by a screw and nut assembly (the brake block is fixedly connected to the nut), the motor drives the screw to rotate forward or backward, causing the nut to move forward or backward, thus clamping or releasing the rotating shaft 90 (defined: forward movement of the nut causes the brake block to brake and position the rotating shaft 90; reverse movement of the nut causes the brake block to release the rotating shaft 90). In other words, during the continuous rotation of the rotating shaft 90, the brake block brakes the rotating shaft 90 (while the rotating shaft 90 is still under driving force). When the braking force is greater than the driving force of the rotating shaft 90, the rotating shaft 90 stops rotating (if the brake block is released, the rotating shaft 90 continues to rotate). This results in low stability throughout the entire process from the release of the brake block to the clamping of the rotating shaft 90. By applying the rotating device provided in this application, the power component 120 and the drive motor 20 are controlled in a unified and synchronous manner by the control module. That is, the control module controls the power component 120 to drive the rotating shaft 90 to rotate while simultaneously controlling the drive motor 20 to be energized. The control module controls the power component 120 to stop driving the rotating shaft 90 while simultaneously controlling the drive motor 20 to be de-energized. In this way, the process of the lead screw 30 driving the first clamping plate 41 and the second clamping plate 42 to loosen (or clamp) the rotating shaft 90 is synchronized with the process of the power component 120 driving the rotating shaft 90 to rotate (or stop driving the rotating shaft 90). In particular, the process of the first clamping plate 41 and the second clamping plate 42 from loosening to clamping the rotating shaft 90 is synchronized with the process of the power component 120 stopping driving the rotating shaft 90. This makes the clamping stability of the first clamping plate 41 and the second clamping plate 42 on the rotating shaft 90 better, ensuring that the rotating shaft 90 will not slip after being clamped.

[0076] In this embodiment, the control module can be an independent controller, such as a mature MCU controller, PLC controller, or programmable microcomputer, or it can be an electric door control switch.

[0077] According to another aspect of the invention, such as Figures 9 to 11As shown, a rotating screen is provided. Specifically, the rotating screen includes a screen 100 and a rotating device as described above. One side of the screen 100 is fixedly mounted to a rotating shaft 90, and the screen 100 rotates synchronously with the rotating shaft 90. Specifically, the rotating screen also includes a mounting bracket 101, which has a receiving groove 102 for accommodating the screen 100. The rotating device is fixedly mounted on the side of the mounting bracket 101 opposite to the receiving groove 102. When the rotating device drives the screen 100 to flip open, the screen 100 flips out of the receiving groove 102; when the rotating device drives the screen 100 to flip closed, the screen 100 flips back into the receiving groove 102. This rotating screen uses the aforementioned rotating device to achieve the flipping open or flipping closed of the screen 100. Then, the rotating shaft positioning and limiting mechanism positions and limits the rotating shaft 90, which can more stably position the rotating shaft 90, allowing the screen 100 to be more stably maintained in the open or closed position.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotating screen, characterized in that, The device includes a screen and a rotating mechanism. The rotating mechanism includes a control module, a housing, a power component, a rotating shaft, and a rotating shaft positioning and limiting mechanism. The power component is installed in the housing and is electrically connected to the control module. The rotating shaft is rotatably installed in the housing, and the power output end of the power component is drivenly connected to the rotating shaft. One side of the screen is fixedly installed on the rotating shaft, and the screen rotates synchronously with the rotating shaft. The pivot positioning and limiting mechanism includes: support; A drive motor is fixedly mounted on the bracket and electrically connected to the control module; A lead screw, rotatably mounted on the bracket, a drive motor connected to the lead screw, and the lead screw having a first thread; A first clamping plate and a second clamping plate, one end of the first clamping plate or one end of the second clamping plate is screwed to the first thread, the other ends of the first clamping plate and the other ends of the second clamping plate extend along the same side of the radial direction of the lead screw, and the receiving space formed between the first clamping plate and the second clamping plate is used to receive the rotating shaft. The first elastic element applies a restoring elastic force to the first clip or the second clip screwed to the first thread; The lead screw is also provided with a second thread and a second elastic element. The direction of rotation of the second thread is opposite to that of the first thread. One end of the first clamp and the second clamp that is not screwed to the first thread is screwed to the second thread. The second elastic element applies a reset elastic force to the first clamp or the second clamp that is screwed to the second thread. The rotating shaft positioning and limiting mechanism further includes a first fixed shaft and a second fixed shaft. Both the first fixed shaft and the second fixed shaft are fixedly arranged relative to the bracket. The first fixed shaft and the second fixed shaft are arranged parallel to each other, and the axes of the first fixed shaft and the second fixed shaft are both perpendicular to the axis of the lead screw. The end of the first clamping piece away from the lead screw is rotatably mounted on the first fixed shaft, and the end of the second clamping piece away from the lead screw is rotatably mounted on the second fixed shaft. Both the first clamping piece and the second clamping piece are flexible components. When the control module controls the power component to drive the rotating shaft to rotate, it controls the drive motor to drive the lead screw to rotate, thereby causing the first clamp and the second clamp to release the rotating shaft. When the control module controls the power component to stop rotating, it controls the drive motor to be de-energized. When the drive motor stops working, the elastic potential energy of the first elastic element can overcome the resistance of the drive motor, causing the lead screw to rotate in the opposite direction, causing the first clamp or the second clamp to move linearly along the axis of the lead screw, and the accommodating space between the first clamp and the second clamp to shrink, thereby clamping the rotating shaft.

2. The rotating screen according to claim 1, characterized in that, Both the first elastic element and the second elastic element are compression springs. The first elastic element is disposed between the bracket and the first clamping piece screwed to the first thread, with both ends of the first elastic element abutting against the bracket and the first clamping piece, respectively. The second elastic element is disposed between the bracket and the second clamping piece screwed to the second thread, with both ends of the second elastic element abutting against the bracket and the second clamping piece, respectively. The first elastic element applies a reset force to the first clamping piece, and the second elastic element applies a reset force to the second clamping piece, so that the first clamping piece and the second clamping piece move closer to each other to clamp and position the rotating shaft. Alternatively, both the first elastic element and the second elastic element are tension springs, connected together. The end of the first elastic element away from the second elastic element is connected to the first clamping plate, and the end of the second elastic element away from the first elastic element is connected to the second clamping plate. The first elastic element and the second elastic element apply tension to the first clamping plate and the second clamping plate respectively, so that the first clamping plate and the second clamping plate move closer to each other to clamp and position the rotating shaft.

3. The rotating screen according to claim 1, characterized in that, The first thread and / or the second thread are multi-start threads.

4. The rotating screen according to claim 1, characterized in that, The first clamping piece has a first arc-shaped segment, which is bent in a direction away from the second clamping piece. The second clamping piece has a second arc-shaped segment, which is bent in a direction away from the first clamping piece. The first arc-shaped segment and the second arc-shaped segment are arranged opposite to each other to form the receiving space for accommodating the rotating shaft.

5. The rotating screen according to claim 4, characterized in that, Anti-slip textures are provided on the two opposite sidewalls of the first arc segment and the second arc segment.

6. The rotating screen according to claim 1, characterized in that, The shaft positioning and limiting mechanism also includes a transmission structure, which has an input end and an output end. The output shaft of the drive motor is driven and connected to the input end, and the output end is connected to the lead screw. The transmission structure is used to reduce the speed and increase the torque of the mechanical power output by the output shaft of the drive motor and transmit it to the lead screw.

Images