Mute unlocking mechanism

Abstract

The utility model provides a mute unlocking mechanism which comprises a driving device, a separating device and a shell, the driving device and the separating device are respectively arranged in the shell, and the driving device drives the separating device to be in an unlocking state from a pressing state. The driving device comprises a memory alloy driving assembly, a restoring spring, a driving circuit board, a driving block and a driving pin, the driving circuit board is connected with the memory alloy driving assembly, the memory alloy driving assembly drives the driving block to move in the first direction, the restoring spring is used for resetting the driving block, and the driving pin is connected with the driving block; a first semicircular hole and a second semicircular hole are formed in the driving pin; the separating device comprises a ball, a separating nut and a separating spring, one end of the separating spring abuts against the separating nut, the other end of the separating spring abuts against the shell, and an inner groove is formed in the separating nut; in a pressing state, the second semicircular hole and the part, limiting the position of the ball, of the shell are located in the inner groove; and in an unlocking state, the first semicircular hole accommodates the ball, and the ball is separated from the inner groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of unlocking control, specifically, relate to a mute unlocking mechanism. BACKGROUND

[0002] The unlocking device is a commonly used connecting and separating device in the fields of aviation, aerospace and navigation, and is commonly used for pressing and releasing devices such as antennas, two-dimensional turntables, solar panels and camera lens covers. The existing unlocking device includes a pyrotechnic unlocking device and a non-pyrotechnic unlocking device. The traditional unlocking device is mostly pyrotechnic, which has the disadvantages of large actuation (unlocking and separating) impact and non-reusability. In addition, since it contains dangerous goods such as gunpowder, special safety measures are required in each link of manufacturing, transportation, storage and use, which significantly increases the production, manufacturing and use costs.

[0003] The Chinese patent with the publication number CN105674813A discloses a separating unlocking device, specifically a hot knife type hook locking separating mechanism. The hot knife type hook locking separating mechanism comprises a hook releasing mechanism, a hot knife assembly, a fastening rope, a fastening rope guide sleeve, a rope pre-tightening spring and a bottom plate. The bottom plate is circumferentially provided with at least three hook releasing mechanisms. The rope pre-tightening spring is arranged on the bottom plate and connected to the two ends of the fastening rope which is circumferentially arranged on the hook of each hook releasing mechanism. The hot knife assembly is arranged on the bottom plate and located opposite to the rope pre-tightening spring for melting the fastening rope. The bottom plate is provided with a fastening rope guide sleeve for guiding the fastening rope.

[0004] Although the non-pyrotechnic unlocking device of the prior art cancels the driving of gunpowder, the restoring force thereof is still released instantaneously by a strong pre-tightening force spring, which still produces impact and noise, and is not suitable for application fields requiring silence and no impact. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model aims to provide a mute unlocking mechanism.

[0006] According to the mute unlocking mechanism provided by the utility model, the driving device and the separating device are arranged in the shell, the driving device drives the separating device from the pressing state to the unlocking state, the driving device includes a memory alloy driving assembly, a restoring spring, a driving circuit board, a driving block and a driving pin, the driving circuit board is connected to the memory alloy driving assembly, the memory alloy driving assembly drives the driving block to move in the first direction, the restoring spring is used for resetting the driving block, the driving pin is connected to the driving block, and the driving pin is provided with a first semicircular hole and a second semicircular hole.

[0007] The driving device includes a memory alloy driving assembly, a restoring spring, a driving circuit board, a driving block and a driving pin, the driving circuit board is connected to the memory alloy driving assembly, the memory alloy driving assembly drives the driving block to move in the first direction, the restoring spring is used for resetting the driving block, the driving pin is connected to the driving block, and the driving pin is provided with a first semicircular hole and a second semicircular hole.

[0008] The separation device comprises a ball, a separation nut and a separation spring, one end of the separation spring abuts against the separation nut, the other end of the separation spring abuts against the shell, and the separation nut is internally provided with an inner groove;

[0009] In the compression state, the second semicircular hole and the shell limit the position of the ball in the inner groove;

[0010] In the unlocking state, the first semicircular hole contains the ball, and the ball is separated from the inner groove.

[0011] Preferably, the shell comprises a supporting cylinder, and the separation nut is sleeved on the supporting cylinder.

[0012] Preferably, a guide pin is further comprised, the guide pin is arranged on the driving circuit board, and the guide pin is matched with the non-circular gap of the driving block.

[0013] Preferably, the central axis of the guide pin is coincident with the central axis of the driving block.

[0014] Preferably, a separation sleeve is further comprised, the separation sleeve is arranged between the separation nut and the shell, one end of the separation spring abuts against the separation sleeve, and the other end of the separation spring abuts against the shell.

[0015] Preferably, the first semicircular hole and the second semicircular hole are arranged in steps on the driving pin, and the driving pin is matched with the arrayed open semicircle of the ball.

[0016] Preferably, the memory alloy driving assembly comprises a first driving wire and a second driving wire, the first driving wire and the second driving wire are backup for each other, and the first driving wire and the second driving wire are both arranged in a rotary parallel mode.

[0017] Preferably, the terminal end of the memory alloy driving assembly is welded and fixed with the driving circuit board in a multi-point rotary welding mode.

[0018] Preferably, the ball comprises one or more, and the plurality of balls are uniformly distributed around the driving pin.

[0019] Preferably, the separation nut further comprises a frustum and a threaded hole, the frustum is arranged at the end of the separation nut away from the shell, and the diameter of the threaded hole is adjustable.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] 1、The utility model discloses a shape memory alloy driving is adopted, and no impact actuation is carried out, so that the safety is high, the unlocking is mute, the response speed is fast, and the utility model can be repeatedly used.

[0022] 2. The utility model discloses a memory alloy wire / belt is contracted through power on, drives the pin to contract, removes the locking to the ball, further removes the locking to the separation nut, and is completed under the separation spring push to remove the locking;

[0023] 3. The utility model discloses a drive pin including first semicircular hole and second semicircular hole, the separation nut is sleeved on the supporting barrel, and the ball is in the second semicircular hole and is in the compression state, and the ball is in the first semicircular hole and is in the unlocking state, through the change of ball position, the compression and unlocking state of separation nut are changed, thereby realizing the unlocking function of the unlocking mechanism.

[0024] 4. The utility model discloses a guide pin, and the guide pin and the driving block are matched with non-circular clearance, which is beneficial to the downward movement of the driving block along the guide pin, and the guide pin limits the axial rotation of the driving block. BRIEF DESCRIPTION OF DRAWINGS

[0025] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-restrictive embodiments with reference to the following drawings:

[0026] Figure 1 It is the schematic diagram that the utility model mainly embodies the mute unlocking mechanism;

[0027] Figure 2 It is the compression state schematic diagram that the utility model mainly embodies the mute unlocking mechanism;

[0028] Figure 3 It is the compression state sectional view that the utility model mainly embodies the mute unlocking mechanism;

[0029] Figure 4 It is the unlocking state schematic diagram that the utility model mainly embodies the mute unlocking mechanism;

[0030] Figure 5 It is the unlocking state sectional view that the utility model mainly embodies the mute unlocking mechanism;

[0031] Figure 6 It is the third direction sectional view that the utility model mainly embodies the mute unlocking mechanism.

[0032] In the drawing:

[0033] Drive pin 2 connecting screw 9 flange platform 1303

[0034] First semicircular hole 201 memory alloy drive assembly 10 separation sleeve 14

[0035] Second semicircular hole 202 first drive wire 1001 ball 15

[0036] Separation spring 3 second drive wire 1002 separation nut 16

[0037] 4 limit screws, 11 wires, 1602 cone

[0038] Restoring spring 5, drive block 12, threaded hole 1603

[0039] Guide pin 6, outer casing 13, inner groove 1604

[0040] Drive circuit board 7 Support cylinder 1302 Detailed Implementation

[0041] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0042] like Figure 1 As shown, a silent unlocking mechanism according to this utility model includes a driving device, a separating device, and a housing 13. The driving device and the separating device are respectively disposed inside the housing 13. The driving device drives the separating device from a pressed state to an unlocked state. The driving device includes a shape memory alloy driving assembly 10, a return spring 5, a driving circuit board 7, a driving block 12, and a driving pin 2. The driving circuit board 7 is connected to the shape memory alloy driving assembly 10. The shape memory alloy driving assembly 10 drives the driving block 12 to move in a first direction. The return spring 5 is used for resetting the driving block 12. The driving pin 2 is connected to the driving block 12, and the driving pin 2 is provided with a first semicircular hole 201 and a second semicircular hole 202. The separation device includes a ball bearing 15, a separation nut 16, and a separation spring 3. One end of the separation spring 3 abuts against the separation nut 16, and the other end abuts against the outer casing 13. An inner groove 1604 is provided inside the separation nut 16. In the clamped state, the second semi-circular hole 202 and the outer casing 13 partially restrict the position of the ball bearing 15 within the inner groove 1604. In the unlocked state, the first semi-circular hole 201 accommodates the ball bearing, and the ball bearing 15 disengages from the inner groove 1604. The shape memory alloy drive assembly 10 drives the drive block 12 to move along a first direction. In this embodiment of the invention, the first direction refers to the axial direction along the drive block 12, that is, the shape memory alloy drive assembly 10 drives the drive block 12 to move along the axial direction of the drive block 12.

[0043] The utility model discloses a mute unlocking mechanism based on memory alloy drive, be applicable to aerospace, warship, unmanned aerial vehicle, robot, smart home etc. Remote unlocking control technical field. Compared with traditional pyrotechnics and non pyrotechnics unlocking device, the utility model discloses shape memory alloy drive, no impact actuation, high safety, mute unlocking, response speed is fast, can be used repeatedly and many advantages, have good use value and economic benefits, especially suitable for the unlocking release of high-precision load, the star rocket separation of small satellite, the separation of deep sea device and special mute scene separation etc.

[0044] The driving device further comprises a guide pin 6 arranged on the driving circuit board 7, the guide pin 6 is matched with the driving block 12 in a non-circular gap, preferably the central axis of the guide pin 6 coincides with the central axis of the driving block 12, the guide pin 6 and the driving block 12 are matched in a non-circular shaft hole mode, the driving block 12 is driven to move downward along the guide pin 6, and the guide pin 6 limits the axial rotation of the driving block 12.

[0045] The separation device further comprises a separation sleeve 14 arranged between the separation nut 16 and the shell 13, one end of the separation spring 3 abuts against the separation sleeve 14, and the other end of the separation spring 3 abuts against the shell 13. When the memory alloy driving assembly 10 is energized to contract, the driving block 12 is driven to move downward, and then the driving pin 2 is driven to move downward, the position of the ball 15 is changed from the second semicircular hole 202 to the first semicircular hole 201, the first semicircular hole 201 of the driving pin 2 releases the radial restriction on the ball 15, the ball 15 moves inward, and is separated from the inner groove 1604 of the separation nut 16, so that the separation nut 16 is unlocked, and the separation nut 16 is separated under the joint action of the separation spring 3 and the separation sleeve 14. The thrust acting on the separation nut 16 can be provided by the separation sleeve 14 and the separation spring 3 together, or can be provided by the separation spring 3 alone.

[0046] Specifically, the separation nut 16 and the shell 13 adopt a sleeve type matching design, the shell 13 comprises a supporting cylinder 1302, the separation nut 16 is sleeved on the supporting cylinder 1302, and the driving pin 2, the supporting cylinder 1302 and the separation nut 16 form a radial movement track of the ball 15. In order to expand the movement space of the ball 15 and enable the position part of the ball 15 to be located in the inner groove 1604, a small opening can be arranged on the part of the supporting cylinder 1302 close to the ball 15, the diameter of the opening is smaller than the diameter of the ball 15, and the ball 15 cannot come out of the supporting cylinder 1302. The separation nut 16 comprises an inner groove 1604, a frustum 1602 and a threaded hole 1603, the inner groove 1604 is arranged on the inner side of the separation nut 16, the design of the inner groove 1604 meets the requirement that the position part of the ball 15 can be located in the inner groove 1604 under the restriction of the supporting cylinder 1302 and the second semicircular hole 202, so as to limit the position of the separation nut 16. The frustum 1602 is arranged at the end of the separation nut 1602 away from the shell 13, the shape of the frustum 1602 is designed, which is helpful to improve the locking and unlocking performance of the separation nut 1602. In the locking state, the frustum 1602 can interact with other structural elements to provide more stable locking force. In the unlocking process, the design of the frustum 1602 can also help to more smoothly release the locking force, so that the separation nut 1602 can be more easily separated from the parent body. The diameter of the threaded hole 1603 can be adjusted, and the diameter of the threaded hole 1603 can be adjusted to match driving pins 2 of different sizes.

[0047] More specifically, the mute unlocking device comprises two parts: a driving device and a separation device.

[0048] The driving device comprises a memory alloy driving assembly 10, a restoring spring 5, a driving circuit board 7, a guide pin 6, a driving block 12 and a driving pin 2. The driving device adopts the memory alloy driving assembly 10 as a mute driving, the tail end of the memory alloy driving assembly 10 is welded and fixed with the driving circuit board 7 through a multi-point rotary welding mode, the memory alloy driving assembly 10 comprises a first driving wire 1001 and a second driving wire 1002, the first driving wire 1001 and the second driving wire 1002 are arranged in a rotary parallel mode respectively, the output force is parallel, the circuit is connected in series, and the first driving wire 1001 and the second driving wire 1002 are backup for each other. Part of the first driving wire 1001 and the second driving wire 1002 is evenly arranged on the plane of the driving block 12, the tail end of the first driving wire 1001 and the second driving wire 1002 is welded and fixed with the driving circuit board 7, the driving circuit board 7 is connected with the power supply through the wire 11, the driving circuit board 7 is electrified, the first driving wire 1001 and the second driving wire 1002 are contracted after being electrified, the driving block 12 is driven to move downward, the driving block 12 moves downward along the guide pin 6, the restoring spring 5 is compressed, and the driving block 12 drives the driving pin 2 to move downward.

[0049] The separation device comprises a ball 15, a separation nut 16, a separation spring 3 and a separation sleeve 14. Figure 2 and 3 As shown in the compressed state, the second semicircular hole 202 of the driving pin 2 and the supporting cylinder 1302 limit the part of the ball 15 at the inner groove 1604 of the separation nut 16, thereby realizing the locking of the separation nut 16. When the memory alloy driving assembly 10 is energized and shrinks, the driving pin 2 is driven to move downward, the first semicircular hole 201 of the driving pin 2 releases the radial limitation of the ball 15, the ball 15 moves inward to escape from the inner groove 1604, the unlocking of the separation nut 16 is realized, and the separation nut 16 is separated under the joint action of the separation spring 3 and the separation sleeve 14. Figure 4 and Figure 5 As shown in the compressed state, the second semicircular hole 202 of the driving pin 2 and the supporting cylinder 1302 limit the part of the ball 15 at the inner groove 1604 of the separation nut 16, thereby realizing the locking of the separation nut 16. The diameter of the first semicircular hole 201 along the radial direction of the driving pin 2 is greater than the diameter of the second semicircular hole 202 along the radial direction of the driving pin 2, preferably the first semicircular hole 201 and the second semicircular hole 202 are step-shaped distributed on the driving pin 2, the driving pin 2 and the ball 15 adopt an array open semicircle cooperation design, when the driving pin 2 moves downward, the ball 15 originally limited in the second semicircular hole 202 moves to the first semicircular hole 201, because the diameter of the first semicircular hole is greater than that of the second semicircular hole, the ball moves to the direction close to the axis of the driving pin 2, that is, moves inward. The ball 15 comprises one or more, and the plurality of balls 15 are uniformly distributed around the driving pin 2.

[0050] As shown in the compressed state, the second semicircular hole 202 of the driving pin 2 and the supporting cylinder 1302 limit the part of the ball 15 at the inner groove 1604 of the separation nut 16, thereby realizing the locking of the separation nut 16. Figure 6 The mute unlocking mechanism of the utility model can be connected to other structures by a flange platform 1303, can be fixed by a connecting screw 9, and in addition, a limiting screw 4 can be used for assembling a guide pin 6.

[0051] The working process of the mute unlocking device of the utility model comprises:

[0052] The second semicircular hole 202 and the supporting cylinder 1302 limit the ball 15 at the inner groove 1604, thereby realizing the locking of the separation nut 16. When the memory alloy driving assembly 10 is energized and shrinks, the driving pin 2 is driven to move downward, the first semicircular hole 201 of the driving pin 2 releases the radial limitation of the ball 15, the ball 15 moves inward to escape from the inner groove 1604, the unlocking of the separation nut 16 is realized, and the separation nut 16 is separated under the joint action of the separation spring 3 and the separation sleeve 14.

[0053] When power is off and reset, the separation nut 16 is pressed on the support cylinder 1302 by hand, the memory alloy driving assembly 10 is elongated, the driving block 12 is reset under the action of the restoring spring 5, the separation nut 16 is reset, the ball 15 returns to the second semicircular hole 202, the ball 15 is limited by the support cylinder 1302 and the second semicircular hole 202, part of which is located in the inner groove of the separation nut 16, and the separation nut 16 is locked.

[0054] The mute unlocking mechanism has the advantages of simple structure, simple control, high safety, fast response speed, reusability and the like, and good use value and economic benefits.

[0055] Compared with the traditional pyrotechnic and non-pyrotechnic unlocking device, the unlocking device provided by the application is driven by shape memory alloy, has no impact, is high in safety, has mute unlocking, fast response speed, is reusable and the like, has good use value and economic benefits, and is especially suitable for unlocking release of high-precision load, separation of satellite and rocket of small satellite, separation of deep-sea device and separation in special mute scene.

[0056] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0057] The specific embodiments of the utility model are described above. It should be understood that the utility model is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of claims, which does not affect the essential content of the utility model. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A mute unlock mechanism, characterized by, The application relates to a drive device, a separation device and a shell (13), wherein the drive device and the separation device are arranged in the shell (13) respectively, and the drive device drives the separation device from a compression state to an unlocking state. The drive device comprises a memory alloy driving assembly (10), a restoring spring (5), a driving circuit board (7), a driving block (12) and a driving pin (2), the driving circuit board (7) is connected with the memory alloy driving assembly (10), the memory alloy driving assembly (10) drives the driving block (12) to move in a first direction, the restoring spring (5) is used for resetting the driving block (12), the driving pin (2) is connected with the driving block (12), and the driving pin (2) is provided with a first semicircular hole (201) and a second semicircular hole (202). The separation device comprises a ball (15), a separation nut (16) and a separation spring (3), one end of the separation spring (3) abuts against the separation nut (16), the other end of the separation spring (3) abuts against the shell (13), and the separation nut (16) is provided with an inner groove (1604). In the compression state, the second semicircular hole (202) and the shell (13) limit the position of the ball (15) to be located in the inner groove (1604). In the unlocking state, the first semicircular hole (201) contains the ball (15), and the ball (15) is separated from the inner groove (1604).

2. The silent unlocking mechanism according to claim 1, wherein The shell (13) comprises a supporting cylinder (1302), and the separation nut (16) is sleeved on the supporting cylinder (1302).

3. The silent unlocking mechanism of claim 1, wherein, The application further comprises a guide pin (6) arranged on the driving circuit board (7), and the guide pin (6) is matched with the driving block (12) in a non-circular gap.

4. The silent unlocking mechanism according to claim 3, wherein The central axis of the guide pin (6) is coincident with the central axis of the driving block (12).

5. The silent unlocking mechanism of claim 1, wherein, The application further comprises a separation sleeve (14) arranged between the separation nut (16) and the shell (13), one end of the separation spring (3) abuts against the separation sleeve (14), and the other end of the separation spring (3) abuts against the shell (13).

6. The silent unlocking mechanism of claim 1, wherein, The first semicircular hole (201) and the second semicircular hole (202) are arranged in a stepped mode on the driving pin (2), and the driving pin (2) is matched with the arrayed open semicircle of the ball (15).

7. The silent unlocking mechanism of claim 1, wherein The memory alloy driving assembly (10) comprises a first driving wire (1001) and a second driving wire (1002), the first driving wire (1001) and the second driving wire (1002) are backup for each other, and the first driving wire (1001) and the second driving wire (1002) are arranged in a rotary parallel mode respectively.

8. The silent unlocking mechanism of claim 1, wherein, The terminal end of the memory alloy driving assembly (10) is welded and fixed with the driving circuit board (7) through a multi-point rotary welding mode.

9. The silent unlocking mechanism of claim 1, wherein, The ball (15) comprises one or more balls (15), and the balls (15) are uniformly distributed around the driving pin (2).

10. The silent unlocking mechanism of claim 1, wherein, The separation nut (16) further comprises a frustum (1602) and a threaded hole (1603), the frustum (1602) is arranged at one end of the separation nut (16) away from the shell (13), and the diameter of the threaded hole (1603) is adjustable.

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