CN-121994469-A - Locking release mechanism and test platform triggered by SMA for compaction and release

CN121994469ACN 121994469 ACN121994469 ACN 121994469ACN-121994469-A

Abstract

The invention discloses a locking and releasing mechanism and a testing platform, wherein the locking and releasing mechanism and the testing platform are triggered by SMA and comprise a mounting platform, a piece to be locked, a locking unit, a locking power unit and a releasing power unit, two supporting seats which are oppositely arranged are arranged on the mounting platform to realize the mounting of the pieces to be locked, the piece to be locked is arranged between the two supporting seats, the locking unit comprises a pressing block, a reset spring and a wedge block, the pressing block can move to and away from the top of the piece to be locked, the pressing block is abutted against the inclined surface of the wedge block, the reset spring is used for pushing the pressing block to move to the wedge block, the wedge block is clamped between the supporting seats and the pressing block and can transversely move to and away from the piece to be locked, the locking power unit is used for controlling the wedge block to push the pressing block to compress the piece to be locked, and the releasing power unit is used for releasing the compression of the pressing block to the piece to be locked.

Inventors

LIU KUN
CHEN RUI
CHEN SHIQI
LI DA
XIAO PENG
ZHAO XI

Assignees

中山大学

Dates

Publication Date: 20260508
Application Date: 20260202

Claims (10)

1. A locking and releasing mechanism triggered by SMA for compacting and releasing is characterized in that, The locking device comprises a mounting platform, a piece to be locked, a locking unit, a locking power unit and a releasing power unit; the mounting platform is provided with two supporting seats which are arranged oppositely, and the two supporting seats are respectively provided with the locking unit, the locking power unit and the releasing power unit; The to-be-locked piece is arranged between the two supporting seats; the locking unit comprises a pressing block, a reset spring and a wedge block; The pressing block is of a structure capable of moving towards and away from the top of the to-be-locked piece, a stressed inclined surface is arranged at the position, away from the top surface of the to-be-locked piece, of the pressing block, and the stressed inclined surface is abutted against the inclined surface part of the wedge block in a fitting way; the reset spring is used for pushing the pressing block to move towards the wedge block; The wedge block is clamped between the supporting seat and the pressing block, the wedge block is of a structure capable of moving towards and away from the to-be-locked piece, and the moving direction of the wedge block is perpendicular to the moving direction of the pressing block; The locking power units are multiple, each locking power unit comprises a locking SMA wire, the locking SMA wires are connected with the wedge blocks, and deformation of the locking SMA wires after the locking SMA wires are electrified is used for pulling the wedge blocks to move towards the to-be-locked pieces so as to control the wedge blocks to push the pressing blocks to press the to-be-locked pieces; The release power unit is a plurality of, release power unit is including release with the SMA silk, release with the SMA silk with the voussoir is connected, deformation after the release is with the SMA silk circular telegram is used for pulling the voussoir moves away from wait to lock the piece, in order to release the briquetting is to wait to lock the compaction of piece.
2. The lock release mechanism of claim 1, wherein, Guide slopes are arranged at the positions adjacent to the top of the piece to be locked and the two supporting seats; the opposite parts of the two pressing blocks and the two guiding slopes are respectively provided with a force application inclined plane, and the two force application inclined planes are respectively in fit and abutting connection with the two guiding slopes.
3. The lock release mechanism of claim 1, wherein, The surface of the supporting seat facing the to-be-locked piece is provided with a cavity, a guide pin is arranged in the cavity, and the guide pin penetrates through the position of the pressing block, which is arranged in the cavity; The reset spring is sleeved outside the guide pin, and the reset spring is elastically abutted with the part of the pressing block, which is arranged in the cavity.
4. The lock release mechanism according to claim 3, wherein, The surface of the pressing block, which faces away from the piece to be locked, is provided with a guide wheel; The support seat is provided with a guide rail, and the guide rail is provided with the guide wheel in a sliding manner.
5. The lock release mechanism of claim 1, wherein, The top of the supporting seat is provided with a top beam; the wedge block is clamped between the top beam and the pressing block, limiting protrusions are arranged on two opposite sides of the top surface of the wedge block, and the two limiting protrusions are respectively abutted to two opposite sides of the top beam.
6. The lock release mechanism of claim 5, wherein, The locking power unit also comprises a conductive clamp for locking and an insulating reversing wheel for locking; One conductive clamp for locking is arranged on one side of the supporting seat, which is far away from the piece to be locked, and one conductive clamp for locking is arranged on the wedge block; the insulating reversing wheel for locking is arranged on the top beam; the locking SMA wire bypasses the insulating reversing wheel for locking, two ends of the locking SMA wire are respectively clamped and fixed on the two locking conductive clamps, and the locking SMA wire has an electrified and contracted working state.
7. The lock release mechanism of claim 6, wherein, The conductive clamp for locking comprises a conductive clamping piece for locking, an insulating clamping block for locking, a pressing plate for locking and an adjusting bolt for locking; the conductive clamping piece for locking is clamped in the insulating clamping block for locking, and the SMA wire for locking is clamped by the conductive clamping piece for locking; The adjusting bolt for locking sequentially penetrates through the pressing plate for locking and the insulating clamping block for locking, and the tightening of the adjusting bolt for locking is used for tightly pressing the pressing plate for locking on the conductive clamping piece for locking.
8. The lock release mechanism of claim 5, wherein, The release power unit further comprises a release conductive clip and a release insulating reversing wheel; One of the release conductive clips is arranged on the top beam, and the other release conductive clip is arranged on the wedge block; The insulation reversing wheel for release is arranged on one side of the supporting seat, which is far away from the piece to be locked; The release SMA wire bypasses the release insulating reversing wheel, two ends of the release SMA wire are respectively clamped and fixed on the two release conductive clamps, and the release SMA wire has an electrified and contracted working state.
9. The lock release mechanism of claim 8, wherein, The release conductive clamp comprises a release conductive clamping piece, a release insulating clamping block, a release pressing plate and a release adjusting bolt; The release conductive clamping piece is clamped in the release insulating clamping block, and the release conductive clamping piece clamps the release SMA wire; The release adjusting bolt sequentially penetrates through the release pressing plate and the release insulating clamping block, and the release adjusting bolt is screwed to tightly press the release pressing plate to the release conductive clamping piece.
10. A test platform comprising a lock release mechanism as claimed in any one of claims 1 to 9, wherein, The installation platform is provided with a code installation seat, the code installation seat is provided with a displacement encoder, a signal acquisition part of the displacement encoder is connected with a pulley which rotates synchronously, a connecting rope is wound on the pulley, one end of the connecting rope is connected with the wedge block, and the other end of the connecting rope is connected with a pre-tightening weight; And the bottom of the piece to be locked is provided with a force sensor, the force sensor is arranged on the mounting platform, and the force sensor is used for detecting the pressure born by the piece to be locked.

Description

Locking release mechanism and test platform triggered by SMA for compaction and release Technical Field The invention relates to the technical field related to locking structures, in particular to a locking release mechanism and a testing platform, wherein the locking release mechanism and the testing platform are triggered by SMA. Background Because of the requirement of free suspension, a certain gap exists between the stator and the rotor. During the launch phase, a locking mechanism is used to eliminate this gap and to release the gap during the track phase. At present, the driving modes of the locking mechanism at home and abroad mainly comprise initiating explosive device driving, motor driving and electromagnetic driving. The traditional locking and releasing mechanism is a initiating explosive device pin puller, and the locking pin is sheared by explosion of the initiating explosive device, so that unlocking is realized. However, the impact force is large when the initiating explosive device explodes, which has adverse effects on satellite attitude control and precision photoelectric equipment, and powder of the initiating explosive device during the explosion can pollute an optical fiber system, and in addition, the initiating explosive device puller belongs to a disposable device and cannot be reused. The motor and the electromagnetic driver control mechanism are also one of the ideas for conventionally solving the locking floating, but the problems of large system volume, complex mechanism, low reliability, high power consumption and the like exist. Therefore, when the magnetic suspension flywheel is further miniaturized, the three driving mechanisms greatly limit the application of the magnetic suspension flywheel in the small flywheel due to the large size. Disclosure of Invention The invention aims to provide a locking release mechanism and a test platform, wherein the locking release mechanism and the test platform are triggered by SMA, so as to solve the problems that in the prior art, the compression release mechanism is complex, the space utilization rate is low, the impact of the compression release mechanism is large and uncontrollable, and a narrow space driving source is difficult to layout. The invention provides a locking and releasing mechanism triggered by SMA, which comprises a mounting platform, a piece to be locked, a locking unit, a locking power unit and a releasing power unit, wherein two supporting seats which are oppositely arranged are arranged on the mounting platform, the locking unit, the locking power unit and the releasing power unit are arranged on the two supporting seats, the piece to be locked is arranged between the two supporting seats, the locking unit comprises a pressing block, a reset spring and a wedge block, the pressing block is a structure capable of moving to and away from the top of the piece to be locked, a stressed inclined surface is arranged at the position of the pressing block, away from the top of the piece to be locked, and is abutted against the inclined surface of the wedge block, the reset spring is used for pushing the pressing block to move to the wedge block, the wedge block is clamped between the supporting seats and the pressing block, the moving direction of the wedge block is perpendicular to the moving direction of the pressing block, the power unit is a plurality of the SMA units, the locking power units comprise pressing blocks which can move to and move away from the pressing block, the SMA units are used for pulling the SMA units to be locked by the locking wire, and the SMA units are used for releasing the locking wire by the locking unit, and the SMA units are used for pulling the locking wire to be locked by the locking wire to be deformed, and the locking unit to be released, and the locking wire is deformed by the locking unit is pressed by the SMA. In one embodiment, guide slopes are arranged at the positions, adjacent to the two supporting seats, of the top of the piece to be locked, and force application inclined planes are arranged at the positions, opposite to the two guide slopes, of the two pressing blocks, and the two force application inclined planes are respectively in fit and abutting connection with the two guide slopes. In one embodiment, the surface of the supporting seat facing the to-be-locked piece is provided with a cavity, a guide pin is arranged in the cavity, the guide pin penetrates through a position of the pressing block, which is arranged in the cavity, the reset spring is sleeved outside the guide pin, and the reset spring is elastically abutted with the position of the pressing block, which is arranged in the cavity. In one embodiment, a guide wheel is arranged on the surface of the pressing block, which faces away from the piece to be locked, and a guide rail is arranged on the supporting seat and is slidably provided with the guide wheel. In one embodiment, a top beam is arranged at the top of th