CN115560201A - Rotating shaft positioning limiting mechanism, rotating device and rotating screen - Google Patents

Abstract

The invention belongs to the technical field of mechanical transmission structures, and particularly relates to a rotating shaft positioning limiting mechanism, a rotating device and a rotating screen. The rotating shaft positioning limiting mechanism comprises a support, a driving motor, a screw rod, a first clamping piece, a second clamping piece and a first elastic piece, wherein 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 in threaded connection with 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 radial side of the screw rod, a containing space formed between the first clamping piece and the second clamping piece is used for containing the rotating shaft, and the first elastic piece applies resetting elasticity to the first clamping piece or the second clamping piece which is in threaded connection with the first thread so that the first clamping piece and the second clamping piece can clamp the positioning rotating shaft tightly. By the technical scheme, the problem that damping limitation on the rotating shaft is prone to failure and the rotating shaft slips in the prior art is solved.

Description

Rotating shaft positioning limiting mechanism, rotating device and rotating screen

Technical Field

The invention belongs to the technical field of mechanical transmission structures, and particularly relates to a rotating shaft positioning limiting mechanism, a rotating device and a rotating screen.

Background

In the prior art, the damping limitation of the rotating shaft is generally realized by adopting a friction damping rubber ring, the damping rubber ring is sleeved on the rotating shaft, then the damping rubber ring is installed in the shaft hole, and the shaft hole is used for extruding the damping rubber ring, so that the damping rubber ring generates a certain amount of deformation, the damping force is applied to the rotating shaft, and the rotating shaft is limited to rotate. However, the damping limiting acting force of the damping rubber ring on the rotating shaft is always limited, when the rotating shaft is subjected to a large external torque, the rotating shaft still easily slips, and after the damping rubber ring is acted for a long time, the damping limitation on the rotating shaft is also easily failed, so that the rotating shaft slips and cannot be stably and effectively limited.

Disclosure of Invention

The invention aims to provide a rotating shaft positioning limiting mechanism, a rotating device and a rotating screen, and aims to solve the problem that damping limitation on a rotating shaft is easy to lose efficacy and the rotating shaft slips in the prior art.

In order to realize the purpose, the invention adopts the technical scheme that: a rotational shaft positioning limiting mechanism comprising:

a support;

the driving motor is fixedly arranged on the bracket;

the screw rod is rotatably arranged on the bracket, the driving motor is connected with the screw rod, and 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 in threaded connection with 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 radial side of the screw rod, and a containing space formed between the first clamping piece and the second clamping piece is used for containing the rotating shaft;

the first elastic piece applies resetting elasticity to the first clamping piece or the second clamping piece which is screwed on the first thread, so that the first clamping piece and the second clamping piece clamp the positioning rotating shaft.

The technical scheme of the invention at least has the following beneficial effects: the rotating shaft positioning limiting mechanism provided by the invention is used for holding and positioning the rotating shaft, and the rotating shaft is arranged in the accommodating space formed between the first clamping piece and the second clamping piece in a penetrating way during assembly. When the pivot need rotate, then driving motor output power rotates with the drive lead screw, because the one end spiro union of first clamping piece or second clamping piece is in the first screw thread of lead screw, the lead screw drives first clamping piece or second clamping piece and overcomes the elastic potential energy of first elastic component, the lead screw rotates and carries out rectilinear movement for first clamping piece or second clamping piece along the axis direction of lead screw for accommodation space between first clamping piece and the second clamping piece enlarges, thereby loosen the pivot, the pivot can the free rotation. When the driving motor stops working, the resistance of the driving motor can be overcome by the elastic potential energy of the first elastic piece, so that the screw rod rotates reversely, the first clamping piece or the second clamping piece moves linearly along the axis direction of the screw rod, the accommodating space between the first clamping piece and the second clamping piece is reduced, the rotating shaft is tightly held, the rotating shaft is positioned, and the rotating shaft stops rotating. Compared with the prior art, the rotating shaft positioning limiting mechanism provided by the invention has the advantages that the possibility of positioning failure of the rotating shaft is reduced, the sliding frequency of the rotating shaft is reduced, and the reliability of positioning the rotating shaft is improved.

In one embodiment, the screw rod is further provided with a second thread and a second elastic piece, the rotating direction of the second thread is opposite to that of the first thread, one end of one of the first clamping piece and the second clamping piece, which is not in threaded connection with the first thread, is in threaded connection with the second thread, and the second elastic piece applies reset elastic force to the first clamping piece or the second clamping piece which is in threaded connection with the second thread, so that the first clamping piece and the second clamping piece are close to each other and clamp the positioning rotating shaft. The application of the technical scheme has at least the following beneficial effects: the pivot location limiting mechanism who uses this embodiment to provide holds tightly the location to the pivot, and during the assembly, the pivot is worn to locate in the accommodation space that forms between first clamping piece and the second clamping piece. When the pivot needs to rotate, then driving motor output rotates with the drive lead screw, because the one end spiro union of first clamping piece is in the first screw thread of lead screw, the one end spiro union of second clamping piece is in the second screw thread, and the soon of second screw thread is opposite with the soon of first screw thread, then the lead screw drives first clamping piece and overcomes the elastic potential energy of first elastic component, the lead screw drives the elastic potential energy of second elastic component to the second clamping piece, the lead screw rotates and converts first clamping piece into, the axis direction of second clamping piece along the lead screw and the rectilinear movement that both kept away from each other, make first clamping piece and second clamping piece keep away from each other, then make accommodation space enlarge, thereby the pivot has been loosened, the pivot can free rotation. When driving motor stop work, then the resistance that driving motor can be overcome to the elastic potential energy that first elastic component and second elastic component have for lead screw antiport makes first clamping piece, second clamping piece along the axis direction of lead screw and the rectilinear movement that both were close to each other, makes first clamping piece and second clamping piece be close to each other, then makes accommodation space reduce, thereby has held the pivot tightly, fixes a position the pivot, pivot stall. Compared with the prior art, the rotating shaft positioning limiting mechanism provided by the invention has the advantages that the possibility of rotating shaft positioning failure is reduced, the rotating shaft slipping frequency is reduced, and the reliability of rotating shaft positioning is improved.

In one embodiment, the first elastic part and the second elastic part are compression springs, the first elastic part is arranged between the support and a first clamping piece screwed on the first thread, two ends of the first elastic part respectively abut against the support and the first clamping piece, the second elastic part is arranged between the support and a second clamping piece screwed on the second thread, two ends of the second elastic part respectively abut against the support and the second clamping piece, the first elastic part applies reset elasticity to the first clamping piece, and the second elastic part applies reset elasticity to the second clamping piece, so that the first clamping piece and the second clamping piece are close to each other to clamp and position the rotating shaft; or the first elastic piece and the second elastic piece are tension springs, the first elastic piece is connected with the second elastic piece, one end, far away from the second elastic piece, of the first elastic piece is connected to the first clamping piece, one end, far away from the first elastic piece, of the second elastic piece is connected to the second clamping piece, and the first elastic piece and the second elastic piece apply tension to the first clamping piece and the second clamping piece respectively so that the first clamping piece and the second clamping piece are close to each other to clamp and position the rotating shaft.

In one embodiment, the first thread and/or the second thread is a multi-start thread.

In one embodiment, the rotating shaft positioning limiting mechanism further comprises a first fixing shaft and a second fixing shaft, the first fixing shaft and the second fixing shaft are fixedly arranged relative to the support, the first fixing shaft and the second fixing shaft are arranged in parallel, the axes of the first fixing shaft and the second fixing shaft are perpendicular to the axis of the screw rod, the end, far away from the screw rod, of the first clamping piece is rotatably arranged on the first fixing shaft, the end, far away from the screw rod, of the second clamping piece is rotatably arranged on the second fixing shaft, and the first clamping piece and the second clamping piece are flexible members.

In one embodiment, the first clamping piece is provided with a first arc-shaped section, the first arc-shaped section is bent towards the direction of keeping away from the second clamping piece, the second clamping piece is provided with a second arc-shaped section, the second arc-shaped section is bent towards the direction of keeping away from the first clamping piece, and the first arc-shaped section and the second arc-shaped section are arranged oppositely to form a containing space for containing the rotating shaft.

In one embodiment, the first arc-shaped section and the second arc-shaped section are provided with anti-slip threads on two opposite side walls.

In one embodiment, the rotating shaft positioning limiting mechanism further comprises a transmission structure, the transmission structure is provided with an input end and an output end, the output rotating shaft of the driving motor is in driving connection with the input end, the output end is connected with the screw rod, and the transmission structure is used for reducing the speed and increasing the torque of the mechanical power output by the output shaft of the driving motor and transmitting the mechanical power to the screw rod.

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

a control module;

a housing;

the power assembly is arranged on the shell and electrically connected with the control module;

the rotating shaft is rotatably arranged on the shell, and the power output end of the power assembly is in driving connection with the rotating shaft;

according to the rotating shaft positioning limiting mechanism, the driving motor is electrically connected with the control module, the rotating shaft penetrates through the accommodating space formed by the first clamping piece and the second clamping piece, the control module controls the driving motor to drive the screw rod to rotate so as to drive the first clamping piece and the second clamping piece to loosen the rotating shaft when the control module controls the power assembly to stop rotating, and the power of the driving motor is controlled by the control module when the control module controls the power assembly to stop rotating.

According to yet another aspect of the present invention, there is provided a rotary screen. Specifically, the rotary screen comprises a screen and the rotating device, wherein one side of the screen is fixedly arranged on a rotating shaft, and the screen rotates synchronously along with the rotating shaft.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural view illustrating a rotation shaft is limited by a rotation shaft positioning limiting mechanism according to a first embodiment of the present invention;

fig. 2 is an assembly structure diagram of a rotating shaft positioning limiting mechanism according to a first embodiment of the present invention;

fig. 3 is an assembly structure diagram of the rotating shaft positioning limiting mechanism according to the first embodiment of the present invention after the first elastic member and the second elastic member are detached;

fig. 4 is a schematic structural diagram of a screw rod of a rotating shaft positioning limiting mechanism according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of a first clamping piece of a rotating shaft positioning limiting mechanism according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of a first clamping piece of a rotating shaft positioning limiting mechanism according to a second embodiment of the present invention;

fig. 7 is an assembly structure diagram of a rotating shaft positioning limiting mechanism according to a third embodiment of the present invention;

FIG. 8 is a schematic view of an assembly structure of the rotating apparatus according to the embodiment of the present invention;

FIG. 9 is a schematic view of a first perspective assembly of a rotatable screen according to an embodiment of the present invention, wherein the screen is in an open position;

FIG. 10 is a schematic view of an assembly structure of a second viewing angle of a rotary screen according to an embodiment of the present invention, wherein the screen is in an open state;

fig. 11 is an enlarged view at a in the rotating screen shown in fig. 10.

Wherein, in the figures, the respective reference numerals:

10. a support;

20. a drive motor;

30. a screw rod; 31. a first thread; 32. a second thread; 33. a connector;

40. an accommodating space; 41. a first clip piece; 411. a first threaded hole; 412. a first light hole; 413. a first arcuate segment; 414. anti-skid lines; 42. a second clip;

51. a first elastic member; 52. a second elastic member;

60. a transmission structure;

71. a first bearing; 72. a second bearing;

81. a first fixed shaft; 82. a second fixed shaft;

90. a rotating shaft;

100. a screen; 101. a mounting frame; 102. accommodating a tank;

110. a housing; 120. and a power assembly.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The first embodiment is as follows:

as shown in fig. 1 to 5, a first embodiment of the present invention provides a rotation shaft positioning limiting mechanism. Specifically, the rotating shaft positioning limiting mechanism includes a bracket 10, a driving motor 20, a screw rod 30, a first clamping piece 41, a second clamping piece 42, a first elastic piece 51 and a second elastic piece 52, the driving motor 20 is fixedly mounted on the bracket 10, the screw rod 30 is rotatably mounted on the bracket 10, the driving motor 20 is connected with the screw rod 30 to transmit power to the screw rod 30, the screw rod 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 the direction of rotation of the first thread 31, one end of the first clamping piece 41 is provided with a first threaded hole 411 and one end of the second clamping piece 42 is provided with a second threaded hole (not shown), one of the first threaded hole 411 of the first clamping piece 41 and the second threaded hole of the second clamping piece 42 is screwed into the first thread 31, the other one of the first threaded hole 411 of the first clamping piece 41 and the second threaded hole of the second clamping piece 42 is screwed into the second thread 32 (hereinafter, the other end of the first threaded hole 411 of the first clamping piece 41 and the second threaded hole of the second clamping piece 42 is considered as an elastic piece extending direction, the other end of the first clamping piece 41 and the second clamping piece 42 is considered as extending in a direction, the direction of the elastic piece 41 and the elastic piece 42 is perpendicular to the direction of the elastic piece 42, and the elastic piece 42 is considered as a direction, the elastic piece extends toward the direction of the same side of the elastic piece 41, and the elastic piece extends toward the elastic piece 41.

When the third embodiment of the present invention is applied to the rotating shaft positioning and limiting mechanism to tightly hold and position the rotating shaft 90, the rotating shaft 90 is inserted into the accommodating space 40 formed between the first clamping piece 41 and the second clamping piece 42 during assembly. When the rotating shaft 90 needs to rotate, the driving motor 20 outputs power to drive the screw rod 30 to rotate, because one end of the first clamping piece 41 is screwed to the first thread 31 of the screw rod 30, one end of the second clamping piece 42 is screwed to the second thread 32, and the screwing direction of the second thread 32 is opposite to that of the first thread 31, the screw rod 30 drives the first clamping piece 41 to overcome the elastic potential energy of the first elastic piece 51, the screw rod 30 drives the second clamping piece 42 to overcome the elastic potential energy of the second elastic piece 52, the rotation of the screw rod 30 is converted into linear movement of the first clamping piece 41 and the second clamping piece 42 along the axial direction of the screw rod 30 and the distance between the first clamping piece 41 and the second clamping piece 42, so that the accommodating space 40 between the first clamping piece 41 and the second clamping piece 42 is enlarged, and the rotating shaft 90 is loosened, that the rotating shaft 90 is loosened by the first clamping piece 41 and the second clamping piece 42, and the rotating shaft 90 can rotate freely. When the driving motor 20 stops working, the elastic potential energy of the first elastic member 51 and the second elastic member 52 overcomes the resistance of the driving motor 20 together, so that the screw rod 30 rotates reversely, the first clamping piece 41 and the second clamping piece 42 move along the axial direction of the screw rod 30 and move close to each other, the accommodating space 40 between the first clamping piece 41 and the second clamping piece 42 is reduced, the rotating shaft 90 is clasped, that is, the rotating shaft 90 is limited by the first clamping piece 41 and the second clamping piece 42, the rotating shaft 90 cannot rotate, the rotating shaft 90 is positioned, and the rotating shaft 90 stops rotating. Compared with the prior art, the rotating shaft 90 positioning limiting mechanism provided by the invention can more stably position the rotating shaft 90, thereby reducing the possibility of positioning failure of the rotating shaft 90, reducing the slipping frequency of the rotating shaft 90 and improving the positioning reliability of the rotating shaft 90.

The first thread 31 and the second thread 32 are arranged on the screw rod 30 at intervals. Alternatively, the first thread 31 and the second thread 32 may be adjacently disposed on the lead screw 30.

As shown in fig. 3 and 4, the rotational shaft positioning restricting mechanism further includes two bearings, i.e., a first bearing 71 and a second bearing 72. The first bearing 71 and the second bearing 72 are both mounted on the bracket 10, two ends of the screw rod 30 are respectively mounted on the first bearing 71 and the second bearing 72, wherein the connector 33 of the screw rod 30 passes through the first bearing 71 and then is connected to the driving motor 20. The screw 30 is mounted to the bracket 10 through the first bearing 71 and the second bearing 72, and can be rotated more smoothly.

As shown in fig. 1 and 2, the first elastic member 51 and the second elastic member 52 of the first embodiment of the present invention are both compression springs. During assembly, the first elastic element 51 is arranged between the bracket 10 and the first clamping piece 41 screwed on the first thread 31, and two ends of the first elastic element 51 respectively abut against the bracket 10 and the first clamping piece 41; the second elastic element 52 is disposed between the bracket 10 and the second clamping piece 42 screwed to the second thread 32, and two ends of the second elastic element 52 respectively abut against the bracket 10 and the second clamping piece 42. The first elastic member 51 applies a return elastic force to the first clamping piece 41, and the second elastic member 52 applies a return elastic force to the second clamping piece 42, so that the first clamping piece 41 and the second clamping piece 42 approach each other when the driving motor 20 stops driving the screw rod 30 to rotate (i.e. the driving motor 20 is powered off), thereby clamping and positioning the rotating shaft 90.

Alternatively, in another embodiment of the first embodiment, the first elastic member 51 and the second elastic member 52 are both tension springs. When assembling, the first elastic element 51 and the second elastic element 52 are connected to form a whole longer extension spring (or a complete single extension spring may be used, in which case, the length of the single extension spring is equal to the sum of the lengths of the first elastic element 51 and the second elastic element 52), one end of the first elastic element 51 away from the second elastic element 52 is connected to the first clamping piece 41, and one end of the second elastic element 52 away from the first elastic element 51 is connected to the second clamping piece 42. The first elastic member 51 and the second elastic member 52 respectively apply a pulling force to the first clamping piece 41 and the second clamping piece 42, so that the first clamping piece 41 and the second clamping piece 42 are close to each other when the driving motor 20 stops driving the screw rod 30 to rotate (i.e. the driving motor 20 is powered off), thereby clamping the rotating shaft 90 in place.

In the first embodiment of the present invention, the first thread 31 and the second thread 32 may both be multi-start threads, and the number of the heads of the first thread 31 is equal to that of the heads of the second thread 32 (of course, the number of the heads of the first thread 31 may not be equal to that of the heads of the second thread 32). Preferably, the first thread 31 and the second thread 32 are both four-start threads. The first thread 31 and the second thread 32 both adopt multi-start threads, which reduces the self-locking property between the first thread 31 and the internal thread of the first threaded hole 411, and reduces the self-locking property between the second thread 32 and the internal thread of the second threaded hole, so that the first elastic element 51 and the second elastic element 52 can drive the first clamping piece 41 and the second clamping piece 42 to move towards each other along the axial direction of the screw rod 30 more easily.

Alternatively, in another embodiment of the first embodiment, the first thread 31 is a multi-start thread, and the second thread 32 is a single-start thread. Alternatively, in another embodiment of the first embodiment, the first thread 31 is a single start thread, and the second thread 32 is a multiple start thread.

As shown in fig. 1 to 3, the rotating shaft positioning limiting mechanism further includes a first fixed shaft 81 and a second fixed shaft 82. The first fixing shaft 81 and the second fixing shaft 82 are fixedly disposed with respect to the bracket 10, the first fixing shaft 81 and the second fixing shaft 82 are disposed parallel to each other, and the axes of the first fixing shaft 81 and the second fixing shaft 82 are perpendicular to the axis of the lead screw 30. As shown in fig. 5, a first light hole 412 is formed at an end of the first clamping piece 41 away from the screw rod 30, the first light hole 412 is rotatably mounted on the first fixing shaft 81, a second light hole (not shown) is formed at an end of the second clamping piece 42 away from the screw rod 30, the second light hole is rotatably mounted on the second fixing shaft 82, wherein the first clamping piece 41 and the second clamping piece 42 are both flexible members. When the first and second clamping pieces 41 and 42 are opened or closed, 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. Since the first clamping piece 41 is a flexible member, when the first threaded hole 411 moves linearly on the first thread 31, the first clamping piece 41 generates a certain amount of deflection deformation (and the deformation amount is not large and is controlled within the elastic deformation range of the first clamping piece 41), so that the first clamping piece 41 and the screw rod 30 cannot move due to no motion interference. Similarly, the second clamping piece 42 rotates around the second fixed shaft 82, and since the second clamping piece 42 is a flexible member, when the second threaded hole moves linearly on the second thread 32, the second clamping piece 42 generates a certain amount of deflection deformation (and the amount of deformation is small, and is controlled within the elastic deformation range of the second clamping piece 42), so that no movement interference occurs between the second clamping piece 42 and the screw rod 30, and the movement cannot be performed. The first fixing shaft 81 serves as a force application fulcrum for the first clip 41 to clasp the rotating shaft 90, and the second fixing shaft 82 serves as a force application fulcrum for the second clip 42 to clasp the rotating shaft 90, so that the first clip 41 and the second clip 42 can clasp the rotating shaft 90 stably to limit the rotating shaft 90, and the rotating shaft 90 cannot rotate.

As shown in fig. 5, the first clamping piece 41 is provided with a first arc-shaped section 413, and the first arc-shaped section 413 is bent away from the second clamping piece 42. Accordingly, the second jaw 42 is provided with a second arc-shaped section which is bent away from the first jaw 41. So, first arc-shaped segment 413 and second arc-shaped segment set up relatively and are used for forming the accommodation space 40 that holds pivot 90, and the accommodation space 40 that first arc-shaped segment 413 and second arc-shaped segment formed can be with pivot 90's periphery wall more adaptation, laminating to hold pivot 90 tightly more stably.

As shown in fig. 1 to fig. 3, the rotating shaft positioning limiting mechanism further includes a transmission structure 60, the transmission structure 60 has an input end and an output end, the output rotating shaft of the driving motor 20 is drivingly connected to the input end, and the output end is connected to the screw rod 30. In the process of outputting power by the driving motor 20, the transmission structure 60 is used for reducing the speed and increasing the torque of the mechanical power output by the output shaft of the driving motor 20 and transmitting the mechanical power to the screw rod 30. In fact, the transmission structure 60 employed in the present embodiment corresponds to a speed reducer.

Example two:

fig. 6 is a schematic structural view showing a first clip of a rotation axis positioning limiting mechanism according to a second embodiment of the present invention. Compared with the rotating shaft positioning limiting mechanism in the first embodiment, the rotating shaft positioning limiting mechanism in the second embodiment has the following differences.

As shown in fig. 6, the first arc-shaped segment 413 and the second arc-shaped segment are provided with anti-slip threads 414 on two opposite side walls. Thus, the friction force of the first arc-shaped section 413 and the second arc-shaped section to the outer peripheral wall of the rotating shaft 90 is increased through the anti-slip threads 414, so that the rotating shaft 90 is held tightly more stably, the rotating shaft 90 cannot rotate, the limitation failure to the rotating shaft 90 is avoided, and the rotating shaft 90 is effectively prevented from slipping.

Compared with the rotating shaft positioning limiting mechanism of the first embodiment, the rotating shaft positioning limiting mechanism of the second embodiment has the same structure except for the above structure, and thus, the details are not repeated herein.

Example three:

fig. 7 is a schematic view showing an assembly structure of a third rotating shaft positioning limiting mechanism according to the embodiment of the present invention. Compared with the rotating shaft positioning limiting mechanism of the first embodiment or the second embodiment, the rotating shaft positioning limiting mechanism of the third embodiment has the following differences.

As shown in fig. 7, the rotating shaft positioning limiting mechanism provided by the third embodiment of the present invention includes a bracket 10, a driving motor 20, a screw rod 30, a first clamping piece 41, a second clamping piece 42, and a first elastic piece 51, wherein the driving motor 20 is fixedly mounted on the bracket 10, two ends of the screw rod 30 are rotatably mounted on the bracket 10, the driving motor 20 is connected to a connector 33 of the screw rod 30, only a first thread 31 is provided on the screw rod 30, and the remaining rod bodies of the screw rod 30 are polished rods. In the third embodiment of the rotating shaft positioning limiting mechanism, 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 light rod of the screw rod 30, but the second clamping piece 42 cannot move linearly along the axial direction of the screw rod 30, and the side surface of the second clamping piece 42 facing the rotating shaft 90 basically clings to the rotating shaft 90 but does not apply pressure on the rotating shaft 90. The first screw hole 411 of one end of the first clamping piece 41 is screwed to the first screw 31, the other end of the first clamping piece 41 and the other end of the second clamping piece 42 both extend along the same radial side of the screw rod 30, an accommodating space 40 for accommodating the rotating shaft 90 is formed between the first clamping piece 41 and the second clamping piece 42, and the first elastic piece 51 applies a return elastic force to the first clamping piece 41 screwed to the first screw 31, so that the first clamping piece 41 and the second clamping piece 42 clamp and position the rotating shaft 90, and the rotating shaft 90 cannot rotate. When the first clamping piece 41 applies pressure to the rotating shaft 90 under the action of the return elastic force of the first elastic piece 51, the rotating shaft 90 slightly deflects towards the second clamping piece 42, so that the second clamping piece 42 and the rotating shaft 90 are mutually abutted to generate compression, and thus, as the first clamping piece 41 continuously applies pressure to the rotating shaft 90 under the action of the return elastic force of the first elastic piece 51, the rotating shaft 90 is limited and positioned by the friction force between the rotating shaft 90 and the first clamping piece 41 and between the rotating shaft 90 and the second clamping piece 42, so that the rotating shaft 90 cannot rotate, and the condition that the rotating shaft 90 slips is effectively prevented.

When the third embodiment of the present invention is applied to the rotating shaft positioning and limiting mechanism to tightly hold and position the rotating shaft 90, the rotating shaft 90 is inserted into the accommodating space 40 formed between the first clamping piece 41 and the second clamping piece 42 during assembly. When the rotating shaft 90 needs to rotate, the driving motor 20 outputs power to drive the screw rod 30 to rotate, because the first threaded hole 411 of the first clamping piece 41 is screwed to the first thread 31 of the screw rod 30, the screw rod 30 drives the first clamping piece 41 to overcome the elastic potential energy of the first elastic piece 51, so that the screw rod 30 rotates and is converted into the first clamping piece 41 to move linearly along the axis direction of the screw rod 30 and far away from the second clamping piece 42, so that the accommodating space 40 between the first clamping piece 41 and the second clamping piece 42 is enlarged, the rotating shaft 90 is loosened, namely the rotating shaft 90 is loosened by the first clamping piece 41 and the second clamping piece 42, and the rotating shaft 90 can rotate freely. When the driving motor 20 stops working, the elastic potential energy of the first elastic member 51 can overcome the resistance of the driving motor 20, so that the screw rod 30 rotates reversely, the first clamping piece 41 moves linearly along the axis direction of the screw rod 30 and close to the second clamping piece 42, the accommodating space 40 between the first clamping piece 41 and the second clamping piece 42 is reduced, the rotating shaft 90 is clasped, that is, the rotating shaft 90 is limited by the first clamping piece 41 and the second clamping piece 42, the rotating shaft 90 is positioned, and the rotating shaft 90 cannot rotate. Compared with the prior art, the rotating shaft 90 positioning limiting mechanism provided by the invention can more stably position the rotating shaft 90, thereby reducing the possibility of positioning failure of the rotating shaft 90, reducing the slipping frequency of the rotating shaft 90 and improving the positioning reliability of the rotating shaft 90.

Compared with the rotating shaft positioning limiting mechanism in the first or second embodiment, the rotating shaft positioning limiting mechanism in the third embodiment has the same structure except for the above structure, and thus is not described herein again.

According to another aspect of the present invention, as shown in fig. 8, a rotating apparatus is provided. Specifically, the rotating device includes a control module (not shown), a housing 110, a power assembly 120, a rotating shaft 90, and the rotating shaft positioning limiting mechanism as described above, wherein the power assembly 120 is mounted on the housing 110, the power assembly 120 is electrically connected to the control module, the rotating shaft 90 is rotatably mounted on the housing 110, a power output end of the power assembly 120 is in driving connection with the rotating shaft 90, a driving motor 20 of the rotating shaft positioning limiting mechanism is electrically connected to the control module, and the rotating shaft 90 is inserted into the accommodating space 40 formed by the first clamping piece 41 and the second clamping piece 42. Specifically, the housing 110 is provided with an installation space, and a speed reducing mechanism is arranged in the installation space, the power output end of the power assembly 120 is connected to the input end of the speed reducing mechanism in a driving manner, so as to realize speed reduction and torque increase, and then the output end of the speed reducing mechanism is connected with the connector 33 of the screw rod 30 in a driving manner, so as to drive the screw rod 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 driving motor 20 to drive the screw rod 30 to rotate so as to drive the first clamping piece 41 and the second clamping piece 42 to release the rotating shaft 90 (i.e., the control module controls the driving motor 20 to be powered on), so that the rotating shaft 90 can rotate freely. When the control module controls the power assembly 120 to stop rotating, that is, 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 driving motor 20 to be powered off, so that one end of the first clamping piece 41 moves along the axial direction of the screw rod 30 under the action of the restoring elasticity of the first elastic piece 51, and/or one end of the second clamping piece 42 moves along the axial direction of the screw rod 30 under the action of the restoring elasticity of the second elastic piece 52, so that the first clamping piece 41 and the second clamping piece 42 clamp the rotating shaft 90 in position, and the rotating shaft 90 cannot rotate.

The rotating device of the invention adopts the rotating shaft positioning limiting mechanism to position and limit the rotating shaft 90, can more stably position the rotating shaft 90, reduces the possibility of positioning failure of the rotating shaft 90, reduces the sliding frequency of the rotating shaft 90 and improves the reliability of positioning the rotating shaft 90. Compared with the prior art, in the prior art, the rotating shaft 90 generally achieves braking positioning through a brake block, the brake block is driven through a screw-nut pair, namely the brake block is fixedly connected to a nut, the screw is driven by a motor to rotate forward or backward to drive the nut to move forward or backward, so that the rotating shaft 90 is clamped or loosened (defined as that the brake block is driven by the nut to perform braking positioning on the rotating shaft 90 when the nut moves forward and the brake block is driven by the nut to loosen the rotating shaft 90 when the nut moves backward), that is, the rotating shaft 90 is braked by the brake block (the rotating shaft 90 is still driven to rotate by the driving force at this time) in the continuous rotation process of the rotating shaft 90, and the rotating shaft 90 stops rotating (the rotating shaft 90 continues to rotate when the braking force is larger than the driving force of the rotating shaft 90, so that the stability of the whole process from the loosening of the brake block to the clamping of the rotating shaft 90 is not high. By applying the rotating device provided by the application, the power assembly 120 and the driving motor 20 are uniformly and synchronously controlled by the control module, that is, the control module controls the driving motor 20 to be powered on while the power assembly 120 drives the rotating shaft 90 to rotate, and controls the driving motor 20 to be powered off while the power assembly 120 stops driving the rotating shaft 90, so that the process that the screw rod 30 drives the first clamping piece 41 and the second clamping piece 42 to loosen (or clamp) the rotating shaft 90 is synchronous with the process that the power assembly 120 drives the rotating shaft 90 to rotate (or stops driving the rotating shaft 90), especially the process that the first clamping piece 41 and the second clamping piece 42 loosen to clamp the rotating shaft 90 is synchronous with the process that the power assembly 120 stops driving the rotating shaft 90, so that the first clamping piece 41 and the second clamping piece 42 have better stability in clamping the rotating shaft 90, and the situation that the rotating shaft 90 cannot slip after being clamped is ensured.

In this embodiment, the control module may be an independent controller, such as an MCU controller, a PLC controller, or a programmable microcomputer, which are well-established in the prior art, and may also be an electric gate control switch.

According to still another aspect of the present invention, as shown in fig. 9 to 11, there is provided a rotary screen. Specifically, the rotary screen includes a screen 100 and a rotating device as described above, one side of the screen 100 is fixedly installed on the rotating shaft 90, and the screen 100 rotates synchronously with the rotating shaft 90. Specifically, the rotary screen further comprises a mounting frame 101, a receiving groove 102 for receiving the screen 100 is formed in the mounting frame 101, and the rotating device is fixedly mounted on one side of the mounting frame 101, which is far away from the receiving groove 102. When the rotating device drives the screen 100 to turn open, the screen 100 turns out from the accommodating groove 102; when the rotating device drives the screen 100 to turn over and close, the screen 100 turns into the receiving groove 102. The rotary screen adopts the rotating device to realize the turning on or turning off of the screen 100, and then the rotating shaft positioning limiting mechanism positions and limits the rotating shaft 90, so that the rotating shaft 90 can be positioned more stably, and the screen 100 can be kept at the opening position or the closing position more stably.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A rotary shaft positioning limiting mechanism is characterized by comprising:

a support (10);

the driving motor (20), the said driving motor (20) is fixedly mounted to the said support (10);

the screw rod (30), the screw rod (30) is rotatably arranged on the bracket (10), the driving motor (20) is connected with the screw rod (30), and the screw rod (30) is provided with a first thread (31);

a first clamping piece (41) and a second clamping piece (42), wherein one end of the first clamping piece (41) or one end of the second clamping piece (42) is screwed with the first thread (31), the other end of the first clamping piece (41) and the other end of the second clamping piece (42) both extend along the same radial side of the screw rod (30), and a containing space (40) formed between the first clamping piece (41) and the second clamping piece (42) is used for containing a rotating shaft (90);

the first elastic piece (51), the first elastic piece (51) exert reset elasticity to the first clamping piece (41) or the second clamping piece (42) screwed on the first thread (31), so that the first clamping piece (41) and the second clamping piece (42) clamp and position the rotating shaft (90).

2. The rotational shaft positioning restriction mechanism according to claim 1,

lead screw (30) still are equipped with second screw thread (32) and second elastic component (52), the spiral of second screw thread (32) with the spiral of first screw thread (31) is opposite, first clamping piece (41) with in second clamping piece (42) not with the one end spiro union of one of first screw thread (31) spiro union in second screw thread (32), second elastic component (52) to the spiro union in first clamping piece (41) of second screw thread (32) or second clamping piece (42) exert reset elasticity, so that first clamping piece (41) with second clamping piece (42) are close to each other and press from both sides tight location pivot (90).

3. The rotational shaft positioning restriction mechanism according to claim 2,

the first elastic piece (51) and the second elastic piece (52) are compression springs, the first elastic piece (51) is arranged between the support (10) and the first clamping piece (41) screwed on the first thread (31), two ends of the first elastic piece (51) respectively abut against the support (10) and the first clamping piece (41), the second elastic piece (52) is arranged between the support (10) and the second clamping piece (42) screwed on the second thread (32), two ends of the second elastic piece (52) respectively abut against the support (10) and the second clamping piece (42), the first elastic piece (51) applies reset elastic force to the first clamping piece (41), and the second elastic piece (52) applies reset elastic force to the second clamping piece (42) so that the first clamping piece (41) and the second clamping piece (42) are close to each other to clamp the rotating shaft (90) and position the rotating shaft;

or, first elastic component (51) with second elastic component (52) are the extension spring, first elastic component (51) with second elastic component (52) link to each other, first elastic component (51) are kept away from the one end of second elastic component (52) and are connected on first clamping piece (41), the one end that first elastic component (51) was kept away from in second elastic component (52) is connected on second clamping piece (42), first elastic component (51) with second elastic component (52) respectively to first clamping piece (41) with second clamping piece (42) exert pulling force, so that first clamping piece (41) with second clamping piece (42) are close to each other will pivot (90) press from both sides tight location.

4. The rotary shaft positioning limitation mechanism according to claim 2,

the first thread (31) and/or the second thread (32) is a multi-start thread.

5. The rotation shaft positioning restriction mechanism according to any one of claims 2 to 4,

the rotating shaft positioning limiting mechanism further comprises a first fixing shaft (81) and a second fixing shaft (82), the first fixing shaft (81) and the second fixing shaft (82) are both corresponding to the support (10) fixedly arranged, the first fixing shaft (81) and the second fixing shaft (82) are arranged in parallel, the first fixing shaft (81) and the second fixing shaft (82) are perpendicular to the axis of the screw rod (30), the end portion of the screw rod (30) is far away from the first clamping piece (41) and is rotatably installed on the first fixing shaft (81), the end portion of the screw rod (30) is far away from the second clamping piece (42) and is rotatably installed on the second fixing shaft (82), and the first clamping piece (41) and the second clamping piece (42) are flexible members.

6. The rotational shaft positioning restriction mechanism according to claim 5,

first clamping piece (41) is equipped with first segmental arc (413), first segmental arc (413) orientation is kept away from the direction of second clamping piece (42) is crooked, second clamping piece (42) are equipped with the second segmental arc, the second segmental arc orientation is kept away from the direction of first clamping piece (41) is crooked, first segmental arc (413) with the second segmental arc sets up relatively and is used for forming and holds pivot (90) accommodation space (40).

7. The rotational shaft positioning restriction mechanism according to claim 6,

and anti-skid grains (414) are arranged on two opposite side walls of the first arc-shaped section (413) and the second arc-shaped section.

8. The rotary shaft positioning limitation mechanism according to claim 1,

the rotating shaft positioning limiting mechanism further comprises a transmission structure (60), the transmission structure (60) is provided with an input end and an output end, the output rotating shaft of the driving motor (20) is in driving connection with the input end, the output end is connected with the screw rod (30), and the transmission structure (60) is used for reducing the speed, increasing the torque and transmitting the mechanical power output by the output shaft of the driving motor (20) to the screw rod (30).

9. A rotary device, comprising:

a control module;

a housing (110);

a power assembly (120), the power assembly (120) being mounted to the housing (110), the power assembly (120) being electrically connected to the control module;

the rotating shaft (90) is rotatably arranged on the shell (110), and the power output end of the power assembly (120) is in driving connection with the rotating shaft (90);

the rotating shaft positioning limiting mechanism according to any one of claims 1 to 8, wherein the driving motor (20) is electrically connected to the control module, the rotating shaft (90) is inserted into the accommodating space (40) formed by the first clamping piece (41) and the second clamping piece (42), the control module controls the driving motor (20) to drive the screw rod (30) to rotate so as to drive the first clamping piece (41) and the second clamping piece (42) to loosen the rotating shaft (90) when the control module controls the power assembly (120) to stop rotating, and the control module controls the driving motor (20) to be powered off when the control module controls the power assembly (120) to stop rotating.

10. A rotary screen, comprising a screen (100) and a rotary device as claimed in claim 9, wherein one side of the screen (100) is fixedly mounted to the rotary shaft (90), and the screen (100) rotates synchronously with the rotary shaft (90).

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