CN-115560201-B - Rotating shaft positioning limiting mechanism, rotating device and rotating screen

CN115560201BCN 115560201 BCN115560201 BCN 115560201BCN-115560201-B

Abstract

The application 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 arranged on the support, the screw rod is rotatably arranged on the support, the driving motor is connected with the screw rod, 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 extend along the same radial side of the screw rod, an accommodating space formed between the first clamping piece and the second clamping piece is used for accommodating a rotating shaft, and the first elastic piece applies reset elastic force 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 clamp the positioning rotating shaft. By applying the technical scheme of the application, the problem that the damping limit of the rotating shaft is easy to fail in the prior art, so that the rotating shaft slips is solved.

Inventors

YANG XIAOYUN
LEI XIAODONG
GAO QIAN

Assignees

深圳市兆威机电股份有限公司

Dates

Publication Date: 20260505
Application Date: 20220929

Claims (6)

1. The rotary screen is characterized by comprising a screen and a rotary device, wherein the rotary device comprises a control module, a shell, a power assembly, a rotating shaft and a rotating shaft positioning limiting mechanism, the power assembly is arranged on the shell, the power assembly is electrically connected with the control module, the rotating shaft is rotatably arranged on the shell, a power output end of the power assembly is in driving connection with the rotating shaft, one side of the screen is fixedly arranged on the rotating shaft, and the screen synchronously rotates along with the rotating shaft; the rotation shaft positioning limiting mechanism includes: A bracket; the driving motor is fixedly arranged on the bracket and is electrically connected with the control module; 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; the first clamping piece and the second clamping piece are connected to the first thread in a threaded mode, the other end of the first clamping piece and the other end of the second clamping piece extend along the same side in the radial direction of the screw rod, and 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 reset elastic force to the first clamping piece or the second clamping piece which are in threaded connection with the first thread; The screw rod is further provided with a second thread and a second elastic piece, the rotation 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; The rotating shaft positioning limiting mechanism further comprises a first fixed shaft and a second fixed shaft, the first fixed shaft and the second fixed shaft are fixedly arranged on the support, the first fixed shaft and the second fixed shaft are mutually parallel, the axes of the first fixed shaft and the second fixed shaft are perpendicular to the axis of the screw rod, the end part, far away from the screw rod, of the first clamping piece is rotatably mounted on the first fixed shaft, the end part, far away from the screw rod, of the second clamping piece is rotatably mounted on the second fixed shaft, and the first clamping piece and the second clamping piece are flexible members; The control module controls the power assembly to drive when the rotating shaft rotates, the driving motor is controlled 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, the control module controls the driving motor to be powered off when the power assembly is controlled to stop rotating, when the driving motor stops working, elastic potential energy of the first elastic piece can overcome resistance of the driving motor, the screw rod is enabled to reversely rotate, the first clamping piece or the second clamping piece is enabled to linearly move along the axis direction of the screw rod, and the accommodating space between the first clamping piece and the second clamping piece is reduced, so that the rotating shaft is tightly held.
2. The rotating screen of claim 1, wherein the rotating screen comprises a plurality of rotating screens, The first elastic piece and the second elastic piece are pressure springs, the first elastic piece is arranged between the support and the first clamping piece which is connected with the first thread in a screwed mode, two ends of the first elastic piece are respectively propped against the support and the first clamping piece, the second elastic piece is arranged between the support and the second clamping piece which is connected with the second thread in a screwed mode, two ends of the second elastic piece are respectively propped against the support and the second clamping piece, the first elastic piece applies reset elastic force to the first clamping piece, and the second elastic piece applies reset elastic force 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.
3. The rotating screen of claim 1, wherein the rotating screen comprises a plurality of rotating screens, The first thread and/or the second thread is a multi-start thread.
4. The rotating screen of claim 1, wherein the rotating screen comprises a plurality of rotating screens, The first clamping piece is provided with a first arc-shaped section, the first arc-shaped section is bent towards the direction 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 away from the first clamping piece, and the first arc-shaped section and the second arc-shaped section are oppositely arranged to form an accommodating space for accommodating the rotating shaft.
5. The rotating screen of claim 4, wherein the rotating screen comprises a plurality of rotating screens, And anti-skid patterns are arranged on two opposite side walls of the first arc-shaped section and the second arc-shaped section.
6. The rotating screen of claim 1, wherein the rotating screen comprises a plurality of rotating screens, The rotating shaft positioning limiting mechanism further comprises a transmission structure, the transmission structure is provided with an input end and an output end, an 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 speed and increasing torque of mechanical power output by an output shaft of the driving motor and transmitting the mechanical power to the screw rod.

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, damping limitation is generally carried out on a rotating shaft 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 a shaft hole, and the shaft hole is formed by extruding the damping rubber ring, so that the damping rubber ring generates a certain amount of deformation, thereby applying damping force on the rotating shaft and limiting the rotating shaft to rotate. But the damping limiting acting force of the damping rubber ring on the rotating shaft is always limited, when the rotating shaft is subjected to larger external torque, the rotating shaft is still easy to slip, and after the damping rubber ring acts for a long time, the damping limiting of the damping rubber ring on the rotating shaft is easy to fail, so that the rotating shaft slips, and the rotating shaft 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 of a rotating shaft is easy to fail and the rotating shaft slides in the prior art. In order to achieve the purpose, the technical scheme adopted by the invention is that the rotating shaft positioning limiting mechanism comprises: A bracket; 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; the device comprises a screw rod, a first clamping piece and a second clamping piece, wherein one end of the first clamping piece or one end of the second clamping piece is in threaded connection with a first thread, the other end of the first clamping piece and the other end of the second clamping piece extend along the same radial side of the screw rod, and an accommodating space formed between the first clamping piece and the second clamping piece is used for accommodating a rotating shaft; The first elastic piece applies reset elastic force 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 clamp the positioning rotating shaft. The technical scheme of the invention has the advantages that the rotating shaft positioning limiting mechanism provided by the invention is used for tightly holding and positioning the rotating shaft, and when the rotating shaft is assembled, the rotating shaft is arranged in the accommodating space formed between the first clamping piece and the second clamping piece in a penetrating way. When the rotating shaft needs to rotate, the driving motor outputs power to drive the screw rod to rotate, and as one end of the first clamping piece or the second clamping piece is connected with the first thread of the screw rod in a threaded mode, the screw rod drives the first clamping piece or the second clamping piece to overcome the elastic potential energy of the first elastic piece, the screw rod rotates and is converted into the first clamping piece or the second clamping piece to linearly move along the axis direction of the screw rod, so that the accommodating space between the first clamping piece and the second clamping piece is enlarged, the rotating shaft is loosened, and the rotating shaft can freely rotate. When the driving motor stops working, the elastic potential energy of the first elastic piece can overcome the resistance of the driving motor, so that the screw rod reversely rotates, the first clamping piece or the second clamping piece linearly moves along the axis direction of the screw rod, the containing 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. By applying the rotating shaft positioning limiting mechanism provided by the invention, the rotating shaft can be positioned more stably, compared with the prior art, the possibility of failure in positioning the rotating shaft is reduced, the frequency of sliding rotation of the rotating shaft is reduced, and the reliability in positioning the rotating shaft is improved. In one embodiment, the screw rod is further provided with a second thread and a second elastic member, the rotation direction of the second thread is opposite to that of the first thread, one end of the first clamping piece and one end of the second clamping piece, which are not in threaded connection with the first thread, are in