CN116292149A - Rotating device capable of rotating at 360 degrees on two sides and fixing at any angle - Google Patents

Rotating device capable of rotating at 360 degrees on two sides and fixing at any angle Download PDF

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Publication number
CN116292149A
CN116292149A CN202310541910.XA CN202310541910A CN116292149A CN 116292149 A CN116292149 A CN 116292149A CN 202310541910 A CN202310541910 A CN 202310541910A CN 116292149 A CN116292149 A CN 116292149A
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gear
rotation
angle
double
outer gear
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Inventor
高志鹰
郑琪
汪建文
东雪青
马剑龙
温彩凤
白叶飞
张立茹
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Inner Mongolia University of Technology
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Inner Mongolia University of Technology
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Priority to CN202310541910.XA priority Critical patent/CN116292149A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D17/00Monitoring or testing of wind motors, e.g. diagnostics
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention discloses a rotating device capable of rotating at 360 degrees on two sides and fixing at any angle, which comprises a double-side gear fixing frame and two single-side 360-degree rotating adjusting fixing mechanisms respectively arranged on the upper side and the lower side of the double-side gear fixing frame, wherein attack angles of wing segments can be conveniently adjusted and mechanically locked, the single-side device is meshed with an outer gear ring through 8 cylindrical spur gears and 1 cylindrical spur gear with a hole slot to form a planetary gear set, the outside is mechanically locked through an annular clamping column, a direct-current sucker electromagnet and a reset spring are used for gear rotation and fixing, a 360-degree motor is driven through a closed-loop stepping motor or a rotating handle is used for manual driving, and finally a required workbench is established outside the outer gear ring. The invention can realize double-side 360-degree rotation and mechanical locking at any angle, and can meet the rotation control of wing section attack angles, camera platforms and optical rotation platforms and the field of rotating machinery needing 360-degree rotation and fixing at any angle.

Description

Rotating device capable of rotating at 360 degrees on two sides and fixing at any angle
Technical Field
The invention relates to a rotating device, in particular to a rotating device which can rotate at 360 degrees on two sides and is fixed at any angle.
Background
With the development of wind turbines, the blades of wind turbines are developed towards the direction of large-scale and flexible, and hundred-meter-class blades are also in the field of view of people, and aircraft wings with high aspect ratios. The aerodynamic characteristic research is very difficult and consumes huge cost on a large-scale wind turbine complete machine and a complete aircraft wing, so that the aerodynamic characteristic research is carried out on a blade or a wing section of the wing, in the experimental research process, the initial attack angle of the wing section is a main research object, the different attack angles can influence the aerodynamic force, meanwhile, the nonlinear aerodynamic elasticity problem can be generated on the wing and the blade with high aspect ratio, after a certain wind speed is reached, vibration occurs, the vibration occurs in serious cases, the traditional fixed attack angle method or the camera damping cradle head is fixed in an elastic manner through jackscrews, the slipping phenomenon can occur when the large external force is applied to the fixed mode, the original fixed angle is changed, the original initial attack angle is changed in a short time, the error is caused to the experiment, and the operation difficulty of the vibration experiment is increased.
Disclosure of Invention
In order to solve the problems, the invention provides a rotating device which is 360-degree-rotated on both sides and fixed at any angle, which can be used for adjusting the initial attack angle of a wing panel and ensuring that the initial attack angle is unchanged after being subjected to larger external force so as to achieve the effect of mechanical locking, avoid measurement errors caused by manual adjustment and improve the accuracy and efficiency of exploring the influence on a flutter experiment under the initial attack angle of the wing panel.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the rotating device comprises a double-side gear fixing frame and two single-side 360-degree rotating adjustment fixing mechanisms which are respectively arranged on the upper side and the lower side of the double-side gear fixing frame, wherein each single-side 360-degree rotating adjustment fixing mechanism comprises a cylindrical spur gear, a cylindrical spur gear with a hole groove and an outer gear ring, the cylindrical spur gears with the hole grooves are meshed with the outer gear ring arranged on the double-side gear fixing frame to form a planetary gear mechanism, an annular clamping column for mechanically locking the cylindrical spur gears with the hole grooves is arranged on the cylindrical spur gears, the annular clamping column is fixed below a direct-current sucker electromagnet through a cylindrical guide rail, and a reset spring is arranged on the cylindrical guide rail; the motor fixing platforms used for fixing the closed-loop stepping motor are arranged on the surfaces of the two outer gear rings, the rotary handles are arranged on the surfaces of the outer gear rings, and a first workbench and a second workbench are arranged on the surfaces of the two outer gear rings respectively and used for providing an operation platform.
Further, a rotary shaft for fixing the cylindrical spur gear and the cylindrical spur gear with a hole groove is arranged on the double-side gear fixing frame, and a threaded hole for installing a first gear cap and a second gear cap is arranged in the center of the rotary shaft and used for limiting the cylindrical spur gear to slide along the axial direction.
Further, the side surface of the double-side gear fixing frame is provided with an angle dial, the scale range is 0-360 degrees, the minimum precision is 1 degree, and the angle dial is used as an auxiliary device, so that the confirmation of the closed-loop stepping motor and the rotating handle after the angle rotation of the outer gear ring is convenient.
Further, the outer gear ring is provided with a cylindrical guide rail, and the surface of the outer gear ring is provided with a hole groove for installing the annular clamp for limiting the annular clamp column to axially slide.
Further, the motor fixing platform, the first workbench and the second workbench are respectively fixed on the outer gear ring through bolts, and the outer gear ring is provided with a motor rotating beam through bolts.
Further, the outer gear ring surface is provided with a pointer which corresponds to an angle dial arranged on the side surface of the double-side gear fixing frame.
Further, the rotary handle is fixed in a hexagonal groove formed in the upper surface of the outer ring gear through bolts.
Further, a special bolt hole is formed in the center of the upper surface of the outer gear ring, and the double-side gear fixing frame and the outer gear ring are connected together through the special bolt.
Further, the direct-current sucking disc electromagnet can disconnect the annular clamping column from the cylindrical spur gear with the hole slot by means of magnetism after being electrified, the direct-current sucking disc electromagnet loses magnetism after being powered off, and the annular clamping column is mechanically locked with the cylindrical spur gear with the hole slot by means of a reset spring.
Further, a key groove matching mechanism is arranged between the rotating shaft of the closed-loop stepping motor and the motor rotating beam, and the closed-loop stepping motor can perform angle adjustment with minimum precision of 1 degree on the external gear ring.
The invention has the following beneficial effects:
the invention has simple structure, can realize 360-degree rotation and mechanical locking at any angle, and eliminates the slipping phenomenon in the flutter experiment, thereby changing the original different initial attack angles and causing error influence on the flutter experiment.
The invention can realize the electric control of the mechanical locking mechanism, can realize the motor driving rotation of the external gear ring with minimum precision of 1 degree, avoids the measurement error caused by manual operation, improves the accuracy and the efficiency of exploring the flutter experiment under different initial attack angles, and also sets the manual rotation handle to further reduce the experiment cost.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
fig. 1 is a schematic overall structure of an embodiment of the present invention.
Fig. 2 is a schematic diagram of an external structure of an embodiment of the present invention.
Fig. 3 is a schematic diagram of an internal structure of an embodiment of the present invention.
Fig. 4 is an overall schematic diagram of an application example of the present invention.
Fig. 5 is a schematic view of the structure of the outer gear ring.
Fig. 6 is a schematic view of a ring-shaped clamping column structure.
Fig. 7 is a schematic diagram of a double-sided gear holder.
Fig. 8 is a schematic view of a special bolt mechanism.
In the figure: 1. a two-degree-of-freedom aeroelastic performance experimental device; 2. a rotating device which can rotate at 360 degrees on two sides and is fixed at any angle; 3. wing segments; 4. a double-sided gear fixing frame; 5. an outer ring gear; 6. cylindrical spur gears; 7. cylindrical spur gears with holes and grooves; 8. an annular clamping column; 9. a direct current sucker electromagnet; 10. a cylindrical guide rail; 11. a closed loop stepper motor; 12. a return spring; 13. a motor fixing platform; 14. rotating the handle; 15. a first workbench; 16. a second workbench; 17. a first gear cap; 18. a second gear cap; 19. a motor rotates the beam; 20. a pointer; a 21 torsion shaft; 22. twisting the fixing nut; 23. a torsion bar; 24. the wing sections twist the bolts; 25. a special bolt; 26 motor rotation shaft; 27. an electromagnet fixing platform; 28. deep groove ball bearings; 29. a panel end plate; 30. torsion shaft interface.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
As shown in fig. 1-3, a rotating device capable of rotating at 360 ° on both sides and fixing at any angle in the embodiment of the present invention comprises a double-sided gear fixing frame 4 and two single-sided 360 ° rotation adjustment fixing mechanisms respectively installed on the upper side and the lower side of the double-sided gear fixing frame 4, each single-sided 360 ° rotation adjustment fixing mechanism comprises a spur gear 6, a spur gear 7 with a hole slot and an outer gear ring 5, the spur gear 6, the spur gear 7 with a hole slot are meshed with an outer gear ring 5 installed on the double-sided gear fixing frame 4 to form a planetary gear mechanism, a ring-shaped clamping post 8 for mechanically locking the spur gear 7 with a hole slot is installed on the spur gear 7, the ring-shaped clamping post 8 is fixed below a direct current sucker electromagnet 9 through a cylindrical guide rail 10, and a reset spring 12 is installed on the cylindrical guide rail 10; the surfaces of the two outer gear rings 5 are respectively provided with a motor fixing platform 13 for fixing the closed-loop stepping motor 11, the surfaces of the outer gear rings 5 are provided with a rotary handle 14, and the surfaces of the two outer gear rings 5 are respectively provided with a first workbench 15 and a second workbench 16 for providing an operation platform.
In this embodiment, 8 spur gears 6, 1 spur gear 7 with a hole slot and one outer gear ring 5 are used for a single-sided 360 ° angular rotation. The number of teeth of the cylindrical spur gear 6 is 72, one tooth corresponds to 5 degrees, the number of teeth of the outer gear ring 5 is 360, one tooth corresponds to 1 degree, and according to the transmission ratio: alpha 1 d 1 =α 2 d 2 The planetary gear set is formed to obtain that the cylindrical straight gear 6 rotates by one tooth, namely 5 degrees, the outer gear ring 5 rotates by 1 tooth, namely 1 degree, and the outer gear ring 5 can be fixed by mechanically locking any cylindrical straight gear 6 and the cylindrical straight gear 7 with the hole slot.
In this embodiment, as shown in fig. 3, a deep groove ball bearing 28 is installed between the double-sided gear fixing frame 4 and the spur gear 6, and between the spur gear 7 with a hole groove, so as to eliminate friction force in the rotation process, improve the precision and service life of the device, and a first gear cap 17 and a second gear cap 18 are installed on the spur gear 6 and the spur gear 7 with a hole groove, so that the axial movement of the gears is limited, and the complete engagement of the planetary gear set is ensured.
In this embodiment, as shown in fig. 8, a special bolt 25 is designed to connect the outer gear ring 5 with the double-sided gear fixing frame 4 by bolts, so that it is ensured that the outer gear ring 5 does not move axially, and a bearing is mounted on the special bolt 25 to satisfy the radial rotation function.
In this embodiment, as shown in fig. 1-2, the outer gear ring 5 is provided with a pointer 20, and the side surface of the double-sided gear fixing frame 4 is provided with an angle dial, the scale range is 0 ° -360 °, and the minimum precision is 1 °, so as to form an auxiliary device, and facilitate confirmation after the closed-loop stepping motor 11 and the rotary handle 14 perform angular rotation on the outer gear ring 5.
In this embodiment, as shown in fig. 5, a cylindrical guide rail 10 is provided on the surface of the outer gear ring 5 for fixing the axial movement of a return spring 12, and a hole groove of an annular clamping post 8 is provided on the surface of the outer gear ring 5 for axial sliding.
In this embodiment, as shown in fig. 2, the annular clamping post 8 is mounted on the cylindrical guide rail 10 of the outer gear ring 5, and the return spring 12 is mounted, so as to realize the locking device of the gear.
In this embodiment, as shown in fig. 2, the electromagnet fixing platform 27 is connected to the cylindrical guide rail 10 by using a bolt, and the direct-current sucker electromagnet 11 is installed, so that the electromagnet can be powered on by magnetically compressing the reset spring 12 to open the locking device of the annular clamping column 8, so as to realize gear rotation, and the electromagnet is powered off, the reset spring 12 recovers to be long, and closes the locking device of the annular clamping column 8, so as to realize gear fixation.
In this embodiment, the electromagnet function is set by the following formula:
Figure BDA0004228236610000051
wherein: Φ: magnetic flux Mx passing through the core polarization plane; s: is the area cm of the polarized surface of the iron core 2 The method comprises the steps of carrying out a first treatment on the surface of the Delta: the breath length of the armature and the iron core is cm when not sucked; alpha: the correction factor is generally between 3 and 4. Meanwhile, F is more than or equal to KL+mg, wherein K is the rigidity of the return spring 12; l is the compression displacement of the return spring 12; m is the mass of the annular clamping column; g is gravity acceleration g=9.8 m/s 2
In this embodiment, as shown in fig. 1, the motor fixing platform 13 and the outer gear ring 5 are fixed by adopting a bolt connection, and the closed-loop stepping motor 11 is installed on the motor fixing platform 13, the motor rotating beam 19 and the motor rotating shaft 21 are matched by adopting a key slot, and the surfaces of the motor rotating beam 19 and the outer gear ring 5 are fixed by adopting bolts, so as to form an electric driving device.
In this embodiment, the pulse signal and the pulse frequency of the closed-loop stepping motor 11 are set, so that the outer ring gear 5 is adjusted at an angle with minimum accuracy of 1 °, that is, the outer ring gear 5 is adjusted at 1 ° by giving one pulse signal.
In this embodiment, to save cost, a hexagonal groove is formed in the outer gear ring 5 and is fixed to the rotary handle 14 by a bolt, so as to realize a manual driving device.
In this embodiment, the motor fixing platform 13, the first workbench 15 and the second workbench 16 are respectively fixed on the outer gear ring 5 through bolts.
In this embodiment, as shown in fig. 4, a rotating device with 360 ° rotation on both sides and fixed at any angle is applied to experiments for exploring the influence of different initial attack angles on flutter. The experimental device comprises: a two-degree-of-freedom aeroelastic performance experiment device 1; a rotating device 2 which rotates at 360 degrees on two sides and is fixed at any angle; a wing section 3; a torsion shaft 21; twisting the fixing nut 22; a torsion bar 23; wing section torquing bolt 24; a panel end plate 29; torsion shaft interface 30.
In this embodiment, as shown in fig. 4, the torsion shaft 21 and the torsion shaft interface 30 are bolted, the second table 16 on the rotating device 2 which is rotatable by 360 ° on both sides and fixed at any angle is specially designed, and the torsion shaft interface 30 and the second table 16 are connected by bolts.
Application example
As shown in fig. 4, the wing 3 and the wing end plate 29 are connected by a wing torsion bolt 24, the first table 15 is designed as a wing table, the second table 16 is designed as a torsion shaft table, the torsion bolt 24 is provided with a torsion rod 23, and the torsion fixation nut is used for connecting with the first table 15.
In this embodiment, for different experiments, only the first workbench 15 and the second workbench 16 need to be specially designed according to different experimental requirements, so that the method is applied to wind tunnel test fields of wind turbine blades and aircraft wing segments, and other rotation fields.
The test method comprises the following steps:
step one, the construction of a flutter experiment influence platform under different initial attack angles is completed.
And step two, a power supply is turned on to electrify the direct-current sucker electromagnet 9 under the workbench No. two 16, the annular clamping column 8 is sucked up, and the reset spring 12 is compressed.
Scheme one: the closed-loop stepping motor 11 is used for driving a motor, a pulse signal is given, a pointer 20 of an external gear ring 5 is aligned with 0 DEG of a double-side gear fixing frame 4, the closed-loop stepping motor 11 and a direct-current sucker electromagnet 9 are closed, and a cylindrical straight gear 7 with a hole slot is mechanically locked by an annular clamp 8.
Scheme II: the manual adjustment is performed using the rotary handle 14, with the pointer 20 of the external gear ring 5 aligned with 0 ° of the double-sided gear mount 4.
And thirdly, turning on a power supply to electrify the direct-current sucker electromagnet 9 under the first workbench 15, sucking the annular clamping column 8 and compressing the reset spring 12.
Scheme one: the closed-loop stepping motor 11 is used for driving a motor, an initial attack angle of a wing section is set to be 16 degrees by giving a pulse signal, a pointer 20 of an outer gear ring 5 is aligned with 16 degrees of a double-side gear fixing frame 4, the closed-loop stepping motor 11 and a direct-current sucker electromagnet 9 are closed, and a circular clamp 8 mechanically locks a cylindrical straight gear 7 with a hole slot.
Scheme II: manual adjustment using the rotary handle 14 sets the initial angle of attack of the wing segments to 16 deg. with the pointer 20 of its outer ring gear 5 aligned with 16 deg. of the double sided gear mount 4.
Step four: and (5) starting the wind tunnel and collecting flutter experimental data under the initial attack angle of 16 degrees.
Step five: no adjustment is made to the second table 16 side.
Step six: the power supply is turned on to electrify the direct current sucking disc electromagnet 9 under the first workbench 15, the annular clamping column 8 is sucked up, and the reset spring 12 is compressed. The closed-loop stepping motor 11 is used for driving the motor or the rotary handle 14 is used for manually driving, the initial attack angle of the wing section is set to be 18 degrees, the pointer 20 of the outer gear ring 5 is aligned with 118 degrees of the double-side gear fixing frame 4, the closed-loop stepping motor 11 and the direct-current sucker electromagnet 9 are closed, and the circular clamp 8 mechanically locks the cylindrical straight gear 7 with the hole slot.
Step seven: and (5) starting the wind tunnel and collecting flutter experimental data under the initial attack angle of 18 degrees. The experimental operation was repeated to collect flutter experimental data at other angles of attack.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.

Claims (10)

1. The utility model provides a rotation device that 360 rotations in two sides and arbitrary angle are fixed which characterized in that: the automatic transmission mechanism comprises a double-side gear fixing frame (4) and two single-side 360-degree rotation adjustment fixing mechanisms which are respectively arranged on the upper side and the lower side of the double-side gear fixing frame (4), wherein each single-side 360-degree rotation adjustment fixing mechanism comprises a cylindrical straight gear (6), a cylindrical straight gear (7) with a hole groove and an outer gear ring (5), the cylindrical straight gears (6) and the cylindrical straight gears (7) with the hole grooves are meshed with the outer gear rings (5) arranged on the double-side gear fixing frame (4) to form a planetary gear mechanism, an annular clamping column (8) for mechanically locking the cylindrical straight gears (7) with the hole grooves is arranged on the cylindrical straight gears (7), the annular clamping column (8) is fixed below a direct-current sucker electromagnet (9) through a cylindrical guide rail (10), and a reset spring (12) is arranged on the cylindrical guide rail (10); the surface of the two outer gear rings (5) is provided with a motor fixing platform (13) for fixing the closed-loop stepping motor (11), the surface of the outer gear rings (5) is provided with a rotary handle (14), and the surface of the two outer gear rings (5) is respectively provided with a first workbench (15) and a second workbench (16) for providing an operation platform.
2. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the double-side gear fixing frame (4) is provided with a rotating shaft for fixing the cylindrical spur gear (6) and the cylindrical spur gear (7) with a hole groove, and the center of the rotating shaft is provided with a threaded hole for installing a first gear cap (17) and a second gear cap (18) for limiting the cylindrical spur gear to slide along the axial direction.
3. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the side surface of the double-side gear fixing frame (4) is provided with an angle dial, the scale range is 0-360 degrees, the minimum precision is 1 degree, and the angle dial is used as an auxiliary device, so that the confirmation of the angle rotation of the outer gear ring (5) by the closed-loop stepping motor (11) and the rotary handle (14) is facilitated.
4. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the outer gear ring (5) is provided with a cylindrical guide rail (10), and the surface of the outer gear ring (5) is provided with a hole groove for installing the annular clamp (8) for limiting the annular clamp column to axially slide.
5. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the motor fixing platform (13), the first workbench (15) and the second workbench (16) are respectively fixed on the outer gear ring (5) through bolts, and the outer gear ring (5) is provided with a motor rotating beam (19) through bolts.
6. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the upper surface of the outer gear ring (5) is provided with a pointer (20) which corresponds to an angle dial arranged on the side surface of the double-side gear fixing frame (4).
7. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the rotary handle (14) is fixed in a hexagonal groove formed in the upper surface of the outer gear ring (5) through bolts.
8. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the center of the upper surface of the outer gear ring (5) is provided with a special bolt hole, and the special bolt (25) is used for connecting the double-side gear fixing frame (4) with the outer gear ring (5), so that the axial movement of the outer gear ring is limited, and the radial rotary movement of the outer gear ring is also ensured.
9. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the direct-current sucking disc electromagnet (9) can disconnect the annular clamping column (8) from the cylindrical spur gear (7) with the hole slot by means of magnetism after being electrified, the direct-current sucking disc electromagnet (9) loses magnetism after being powered off, and the annular clamping column (8) is mechanically locked with the cylindrical spur gear (7) with the hole slot by means of a reset spring (12).
10. A double sided 360 ° rotation and any angle fixed rotation device as claimed in claim 1 wherein: the rotating shaft (26) of the closed-loop stepping motor (11) and the motor rotating beam are provided with a key groove matching mechanism, and the closed-loop stepping motor (11) can perform angle adjustment of which the minimum precision is 1 degree on the external gear ring (5).
CN202310541910.XA 2023-05-15 2023-05-15 Rotating device capable of rotating at 360 degrees on two sides and fixing at any angle Pending CN116292149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310541910.XA CN116292149A (en) 2023-05-15 2023-05-15 Rotating device capable of rotating at 360 degrees on two sides and fixing at any angle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310541910.XA CN116292149A (en) 2023-05-15 2023-05-15 Rotating device capable of rotating at 360 degrees on two sides and fixing at any angle

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CN116292149A true CN116292149A (en) 2023-06-23

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