locking device

Abstract

The present disclosure provides a locking device, belonging to the technical field of mechanical equipment. The locking device comprises a first connecting assembly and a second connecting assembly. The first connecting assembly comprises a first cylinder and a connecting shaft, the connecting shaft is located in the first cylinder, and the first end of the connecting shaft is connected with one end of the first cylinder. The second connecting assembly comprises a second cylinder and a locking piece. The second cylinder is used for butt joint with the second end of the first cylinder. The locking piece is located in the second cylinder and connected with the second cylinder. The locking piece is used for connecting with the second end of the connecting shaft and rotating relative to the connecting shaft under the driving of the connecting shaft when the first cylinder and the second cylinder are butt jointed. And the locking piece is used for holding the connecting shaft after connecting with the second end of the connecting shaft to prevent the connecting shaft from moving. The present disclosure can improve the locking effect of two components and improve the safety of operation.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of mechanical equipment, and particularly relates to a locking device. BACKGROUND

[0002] The locking device is widely used in the fields of aerospace, railway, mechanical engineering, marine ship, etc., and mainly functions to realize stable connection between two or more components through a mechanical mode, so as to ensure the stability and safety of the connection part during use.

[0003] In the related art, the locking device usually includes one of a buckle, a bolt connecting piece, etc. When the locking device is the buckle, a clasp in the buckle is connected at an end face of one of the two components, and a clamping hook in the buckle is connected at an end of the other of the two components. When the two components need to be connected together, the two components are first butted together, and then the clasp is sleeved on the clamping hook and clamped together with the clamping hook. If the locking device is the bolt connecting piece, bolt holes are respectively arranged at the butted end faces of the two components. When locking, the two components are first butted together, and then the bolt is inserted into the bolt hole and locked, so as to realize the fastening connection of the two components.

[0004] However, when the above locking device realizes the locking and fixing of the two components, manual operation of the locking device is needed after the two components are butted, so that the locking process is cumbersome, and is affected by human factors, resulting in unstable locking effect and certain safety hazards in operation. SUMMARY

[0005] The embodiment of the present disclosure provides a locking device, which can improve the locking effect of two components and improve the safety of operation. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a locking device, which can improve the locking effect of two components and improve the safety of operation. The technical solution is as follows:

[0007] In yet another implementation form of the disclosure, the locking member comprises a first transmission wheel, a plurality of second transmission wheels and a plurality of locking arms. The first transmission wheel is configured to be connected to the second end of the connecting shaft and is capable of rotating synchronously with the first cylinder when the connecting shaft moves with the first cylinder. The plurality of second transmission wheels are arranged along the circumference of the first transmission wheel and each of the plurality of second transmission wheels is engaged with the first transmission wheel. Each of the plurality of locking arms is arranged corresponding to one of the plurality of second transmission wheels, one end of each of the plurality of locking arms is connected to the corresponding second transmission wheel, and the other end of each of the plurality of locking arms is configured to be in contact with the outer wall of the connecting shaft to hold the connecting shaft when the second transmission wheel rotates.

[0008] In yet another implementation form of the disclosure, the center of the first transmission wheel has an inner hole, the inner wall of the inner hole has an inner thread, and the outer wall of the second end of the connecting shaft towards the second cylinder has an outer thread matched with the inner thread.

[0009] In yet another implementation form of the disclosure, the locking arm comprises a linear arm body and an arc-shaped arm body. One end of the linear arm body is connected to the center of the corresponding second transmission wheel, and the other end of the linear arm body is connected to one end of the arc length direction of the arc-shaped arm body. When the linear arm body is located on a straight line with the radius of the connecting shaft, the circumference of the arc length of the arc-shaped arm body is in contact with the circumference of the connecting shaft.

[0010] In yet another implementation form of the disclosure, one of the first cylinder towards the second cylinder and the second cylinder towards the first cylinder has at least one guide groove, and the other has at least one guide block. The guide groove and the guide block correspond to each other, and the guide block is configured to be inserted into the corresponding guide groove.

[0011] In yet another implementation form of the disclosure, the locking device further comprises a bolt assembly. The bolt assembly is located in the second cylinder, one end of the bolt assembly is connected to the second cylinder, and the other end of the bolt assembly is capable of extending and retracting along the radial direction of the second cylinder relative to the one end of the bolt assembly.

[0012] In a further implementation form of the disclosure, the latch assembly comprises a guide cylinder, a driving member and a latch, one end of the guide cylinder is connected to the inner wall of the second cylinder body, the other end of the guide cylinder extends radially inwardly towards the second cylinder body and is used to contact the outer wall of the connecting shaft; the driving member and the latch are movably arranged in the guide cylinder, and the latch is arranged on the side of the driving member which is radially inwardly towards the first cylinder body, the driving member is used to drive the latch to move radially along the first cylinder body, and the latch is used to be inserted into the connecting shaft.

[0013] In a further implementation form of the disclosure, the driving member is a thermal deformation body, and the outer surface of the thermal deformation body is in contact with the inner wall of the guide cylinder and the latch, respectively.

[0014] In a further implementation form of the disclosure, the thermal deformation body is a structural member comprising a shape memory alloy.

[0015] In a further implementation form of the disclosure, the locking device further comprises a sensor and a controller, the sensor is arranged in the first cylinder body and connected to the locking member, and the sensor is used to detect whether the locking member contacts the connecting shaft; the controller is electrically connected to the sensor and the thermal deformation body, respectively, and the controller is used to control the thermal deformation body to be powered on to heat the thermal deformation body when the sensor detects that the locking member contacts the connecting shaft.

[0016] The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

[0017] Since the first connecting assembly comprises the first cylinder body and the connecting shaft, one end of the first cylinder body can be coaxially connected to the end of the first component, and the connecting shaft is arranged away from the first component, so that the connecting shaft can be subsequently matched with the second connecting assembly. Since the second connecting assembly comprises the second cylinder body and the locking member, one end of the second cylinder body can be coaxially connected to the end of the second component, and the locking member is arranged towards the connecting shaft. Then, the first cylinder body is controlled to move towards the second cylinder body, so that the connecting shaft can move towards the locking member synchronously and be connected to the locking member.

[0018] When the second end of the connecting shaft is connected to the locking member, the locking member can be rotated, and the locking member can tightly hold the connecting shaft while rotating, so as to limit the connecting shaft from moving, so that the connecting shaft can be stably connected to the locking member and will not be separated, thereby realizing the connection between the first cylinder body and the second cylinder body, and finally realizing the fixed connection between the two components.

[0019] That is, the above locking device can automatically connect the two components through the cooperation between the connecting shaft and the locking piece when the two components are brought together and docked together, improve the locking efficiency, and can avoid manual operation of the locking device, improve the locking effect of the two components, and also reduce the safety hidden danger. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a structural schematic diagram of the locking device provided by the present disclosure;

[0022] Figure 2 is Figure 1 a structural schematic diagram of the first connecting assembly in the present disclosure;

[0023] Figure 3 is Figure 1 a structural schematic diagram of the second connecting assembly in the present disclosure;

[0024] Figure 4 is Figure 3 a structural schematic diagram of the locking piece in the present disclosure;

[0025] Figure 5 is Figure 4 a structural schematic diagram of the locking piece holding the connecting shaft in the present disclosure;

[0026] Figure 6 is a structural schematic diagram of the latch assembly;

[0027] Figure 7 is a structural schematic diagram of the latch assembly inserted into the connecting shaft.

[0028] The meanings of the symbols in the drawings are as follows:

[0029] 1, first connecting assembly; 11, first cylinder; 12, connecting shaft; 120, through hole;

[0030] 2, second connecting assembly; 21, second cylinder; 22, locking piece; 221, first transmission wheel; 222, second transmission wheel; 223, locking arm; 2231, linear arm body; 2232, arc-shaped arm body;

[0031] 3, latch assembly; 31, guide cylinder; 32, driving piece; 33, latch;

[0032] 4, sensor;

[0033] 5. Controller

[0034] 101. Guide groove; 102. Guide block. DETAILED DESCRIPTION

[0035] For the purpose, technical solutions and advantages of the present disclosure to be clearer, the embodiments of the present disclosure will be further described in detail below with reference to the drawings.

[0036] The embodiments of the present disclosure provide a locking device for fixing two components with relative movement in abutment. Wherein, the two components can be shafts.

[0037] Figure 1 is a structural schematic diagram of the locking device provided by the embodiments of the present disclosure, as shown in Figure 1 , the locking device comprises a first connecting assembly 1 and a second connecting assembly 2.

[0038] Figure 2 is a structural schematic diagram of the first connecting assembly in Figure 1 , in combination with Figure 2 , the first connecting assembly 1 comprises a first cylinder 11 and a connecting shaft 12, the first cylinder 11 is used to be connected with the first component and can move towards the second component with the first component. The connecting shaft 12 is located in the first cylinder 11, and the first end of the connecting shaft 12 is connected with one end of the first cylinder 11, and the connecting shaft 12 can move together with the first cylinder 11 along the axis direction of the connecting shaft 12.

[0039] Figure 3 is a structural schematic diagram of the second connecting assembly in Figure 1 , in combination with Figure 3 , the second connecting assembly 2 comprises a second cylinder 21 and a locking piece 22, the second cylinder 21 is used to be connected with the second end of the first cylinder 11 in abutment, the locking piece 22 is located in the second cylinder 21 and connected with the second cylinder 21, the locking piece 22 is used to be connected with the second end of the connecting shaft and rotate relative to the connecting shaft under the drive of the connecting shaft when the first cylinder 11 and the second cylinder 21 are connected in abutment, and the locking piece 22 is used to hold the connecting shaft 12 tightly after being connected with the second end of the connecting shaft 12 to prevent the connecting shaft 12 from moving.

[0040] Since the first connecting assembly 1 comprises the first cylinder 11 and the connecting shaft 12, one end of the first cylinder 11 can be coaxially connected with the end of the first component, and the connecting shaft 12 is arranged away from the first component, so that the connecting shaft 12 can be subsequently matched with the second connecting assembly 2. Since the second connecting assembly 2 comprises the second cylinder 21 and the locking piece 22, one end of the second cylinder 21 can be coaxially connected with the end of the second component, and the locking piece 22 is arranged towards the connecting shaft 12. Then, the first cylinder 11 is controlled to move towards the second cylinder 21, so that the connecting shaft 12 can synchronously move towards the locking piece 22 and be connected with the locking piece 22. When the second end of the connecting shaft 12 is connected with the locking piece 22, the locking piece 22 can be rotated, and the locking piece 22 can tightly hold the connecting shaft 12 while rotating, so as to limit the connecting shaft 12 from moving any more, so that the connecting shaft 12 can be stably connected with the locking piece 22 and cannot be separated, thereby realizing the connection of the first cylinder 11 and the second cylinder 21, and finally realizing the fixed connection of the two components.

[0041] That is, the above locking device can automatically connect the two components through the mutual cooperation between the connecting shaft 12 and the locking piece 22 when the two components are docked together by moving towards each other, thereby improving the locking efficiency, avoiding manual operation of the locking device, improving the locking effect of the two components, and reducing the safety hazard.

[0042] Figure 4 is Figure 3 the structure of the locking piece, and Figure 4 Optionally, the locking piece 22 comprises a first transmission wheel 221, a plurality of second transmission wheels 222, and a plurality of locking arms 223. The first transmission wheel 221 is used to be connected with the second end of the connecting shaft 12, and the first transmission wheel 221 can synchronously rotate when the connecting shaft 12 moves with the first cylinder 11. The plurality of second transmission wheels 222 are spaced along the circumference of the first transmission wheel 221 and located outside the circumference of the first transmission wheel 221, and each second transmission wheel 222 in the plurality of second transmission wheels 222 is in meshing connection with the first transmission wheel 221.

[0043] The plurality of locking arms 223 are arranged in one-to-one correspondence with the plurality of second transmission wheels 222, and the plurality of locking arms 223 are located outside the connecting shaft 12. One end of each locking arm 223 is connected with the corresponding second transmission wheel 222, and the other end of the locking arm 223 is used to abut against the outer wall of the connecting shaft 12 to tightly hold the connecting shaft 12 when the second transmission wheel 222 rotates.

[0044] In the above implementation, the first transmission wheel 221 is used to connect the connecting shaft 12, so as to be able to rotate while moving axially after being connected with the connecting shaft 12. The plurality of second transmission wheels 222 are used to engage with the first transmission wheel 221, so as to be able to synchronously rotate after the first transmission wheel 221 rotates. Each locking arm 223 is connected with the corresponding second transmission wheel 222, so as to synchronously rotate with the second transmission wheel 222 after the second transmission wheel 222 rotates, and then lock and position the connecting shaft 12 after rotating, so that the connecting shaft 12 and the first transmission wheel 221 are stably connected together.

[0045] In other examples, the locking member 22 can also have other structures, such as a connecting sleeve connected with the second cylinder 21 and a plurality of electric telescopic rods arranged in the circumferential direction of the connecting sleeve. The telescopic direction of each electric telescopic rod is the radial direction of the second cylinder 21. When the connecting shaft 12 is inserted into the connecting sleeve, the electric telescopic rods are controlled to extend, so as to position the connecting shaft 12 inserted into the connecting shaft 12, and then realize the connection of the first cylinder 11 and the second cylinder 21.

[0046] In combination Figure 1 Optionally, the center of the first transmission wheel 221 has an inner hole, the inner wall of the inner hole has an internal thread, and the outer wall of the second end of the connecting shaft 12 towards the second cylinder 21 has an external thread matched with the internal thread.

[0047] In the above implementation, the center of the first transmission wheel 221 has an inner hole, so that the inner hole provides a containing space for the connecting shaft 12 towards the second end of the second cylinder 21, so that the connecting shaft 12 can be inserted into the first transmission wheel 221. Moreover, the internal thread is arranged in the inner wall of the inner hole, so that the inner hole and the connecting shaft 12 are threadedly connected. Moreover, the connecting shaft 12 can drive the first transmission wheel 221 to rotate when moving axially.

[0048] It should be noted that, in order to prevent the self-locking of the threads between the first transmission wheel 221 and the connecting shaft 12, the friction between the threads of the first transmission wheel 221 and the connecting shaft 12 is reduced as much as possible, so that the connecting shaft 12 can also drive the first transmission wheel 221 to rotate synchronously when moving linearly.

[0049] In other examples, a spiral-shaped sliding groove can also be arranged in the inner wall of the inner hole, and a sliding block is arranged on the outer wall of the second end of the connecting shaft 12. The sliding block is connected with the outer wall of the connecting shaft 12, and is located in the sliding groove and abuts against the groove wall of the sliding groove. In this way, the first transmission wheel 221 can also be driven to rotate synchronously under the action of the sliding block and the sliding groove when the connecting shaft 12 moves axially.

[0050] Alternatively, a transmission gear and a bevel gear are arranged on the outer periphery of the first transmission wheel 221. The axis of the transmission gear is perpendicular to the axis of the connecting shaft 12. Meanwhile, a rack is arranged on the outer wall of the second end of the connecting shaft 12 and extends along the axis of the connecting shaft 12. The rack is engaged with the transmission gear. The transmission gear is engaged with the bevel gear. The axis of the bevel gear is perpendicular to the axis of the transmission gear. The first transmission wheel 221 is coaxially fixed on one side of the bevel gear. In this way, the first transmission wheel 221 can rotate synchronously when the connecting shaft 12 moves axially.

[0051] Continuing to combine Figure 4 Alternatively, the locking arm 223 comprises a linear arm body 2231 and an arc-shaped arm body 2232. One end of the linear arm body 2231 is connected to the center of the second transmission wheel 222 corresponding to the locking arm 223. The other end of the linear arm body 2231 is connected to one end of the arc length direction of the arc-shaped arm body 2232. When the linear arm body 2231 is located on the straight line of the radius of the connecting shaft 12, the circumference of the arc length of the arc-shaped arm body 2232 is fitted with the circumference of the connecting shaft 12.

[0052] In the above implementation, the locking arm 223 is arranged as the linear arm body 2231 and the arc-shaped arm body 2232. The arc-shaped arm body 2232 can be fixedly connected with the second transmission wheel 222 as a whole through the linear arm body 2231.

[0053] Figure 5 is Figure 4 The structure diagram of the locking member holding the connecting shaft, combined with Figure 5 When the second transmission wheel 222 rotates, the linear arm body 2231 can drive the arc-shaped arm body 2232 to rotate synchronously with the second transmission wheel 222. The arc-shaped arm body 2232 is used to fit with the outer wall of the connecting shaft 12 after rotation, so as to hold the connecting shaft 12 and prevent the connecting shaft 12 from moving.

[0054] Exemplarily, the inner arc surface of the linear arm body 2231 can be provided with a plurality of grooves or convex points, convex edges and the like for increasing the friction force.

[0055] In the embodiment of the present disclosure, the inner arc surface of the arc-shaped arm body 2232 can be coated with a coating with high roughness and good wear resistance, so as to increase the friction force between the arc-shaped arm body 2232 and the connecting shaft 12. For example, the coating can be a structure member such as silicon carbide, tungsten steel, polyurethane and the like.

[0056] In the embodiment of the present disclosure, the second transmission wheel 222 is four. The four second transmission wheels 222 are uniformly arranged along the circumference of the first transmission wheel 221. Correspondingly, the locking arm 223 is also four. In this way, the four locking arms 223 can hold the connecting shaft 12 in four directions along the circumference, so as to improve the holding efficiency.

[0057] In other examples, the number of second transmission wheels 222 can also be other numbers, such as three, two, etc.

[0058] Again referring to Figure 1 Optionally, one of the one end of the first barrel 11 towards the second barrel 21 and the one end of the second barrel 21 towards the first barrel 11 has at least one guide groove 101 and the other has at least one guide block 102, the guide groove 101 corresponds to the guide block 102 one by one, and the guide block 102 is used for being inserted in the corresponding guide groove 101.

[0059] In the above implementation, one of the first barrel 11 and the second barrel 21 is provided with a guide groove 101, and the other is provided with a guide block 102, so that the butt joint of the first barrel 11 and the second barrel 21 is guided and limited by the cooperation of the guide block 102 and the guide groove 101, so that the first barrel 11 and the second barrel 21 are coaxial, and the butt joint effect is further improved.

[0060] In the embodiment of the present disclosure, in order to further improve the positioning effect, a plurality of guide grooves 101 are arranged in the end surface of the first barrel 11 towards the second barrel 21 along the circumference of the first barrel 11, and one guide block 102 is defined between the adjacent two guide grooves 101. Correspondingly, a plurality of guide grooves 101 are also arranged in the end surface of the second barrel 21 towards the first barrel 11 along the circumference of the second barrel 21, and one guide block 102 is also defined between the adjacent two guide grooves 101 in the second barrel 21. Any one of the guide blocks 102 in the second barrel 21 can be inserted into one of the guide grooves 101 in the first barrel 11, and any one of the guide blocks 102 in the first barrel 11 can be inserted into one of the guide grooves 101 in the second barrel 21.

[0061] Exemplarily, in order to further improve the positioning effect, the guide groove 101 is triangular, and the guide block 102 is also triangular, and the tip of the guide block 102 is away from the barrel.

[0062] In other examples, the guide block 102 and the guide groove 101 can also be rectangular, wavy, etc.

[0063] Optionally, the locking device further comprises a latch assembly 3, the latch assembly 3 is located in the second barrel 21, one end of the latch assembly 3 is connected with the second barrel 21, and the other end of the latch assembly 3 can be telescopic along the radial direction of the second barrel 21 relative to the one end, and the other end of the latch assembly 3 is used for being inserted in the connecting shaft 12.

[0064] In the above implementation, the latch assembly 3 is used for further connecting the connecting shaft 12 and the first transmission wheel 221 together, preventing the connecting shaft 12 and the first transmission wheel 221 from being separated.

[0065] Figure 6 is a structural schematic diagram of the latch assembly, in combination with Figure 6 Optionally, the latch assembly 3 comprises a guide cylinder 31, a driving member 32 and a latch 33, one end of the guide cylinder 31 is connected with the inner wall of the second cylinder body 21, the other end of the guide cylinder 31 extends radially inwardly towards the second cylinder body 21 and is used to contact the outer wall of the connecting shaft 12.

[0066] The driving member 32 and the latch 33 are movably located in the guide cylinder 31, and the latch 33 is located on the side of the driving member 32 radially inwardly towards the first cylinder body 11, the driving member 32 is connected with the first end of the latch 33 and is used to drive the latch 33 to move radially along the first cylinder body 11, and the second end of the latch 33 is used to be inserted into the connecting shaft 12. The length direction of the latch 33 is the radial direction of the connecting shaft 12.

[0067] In the above implementation manner, the guide cylinder 31 is used to provide a mounting basis for the driving member 32 and the latch 33 and the like. The driving member 32 is used to drive the latch 33 to move. The latch 33 is used to be inserted into the connecting shaft 12 so as to prevent the connecting shaft 12 from moving circumferentially.

[0068] Optionally, the driving member 32 is a thermal deformation body, and the outer surface of the thermal deformation body is in contact with the inner wall of the guide cylinder 31 and the latch 33 respectively. The thermal deformation body can be deformed and expanded after being heated and return to the original state after cooling.

[0069] In the above implementation manner, the driving member 32 is arranged as a thermal deformation body, whether the thermal deformation body is deformed and expanded can be controlled by controlling whether the thermal deformation body is heated, and whether the latch 33 moves can be further controlled.

[0070] Figure 7 is a structural schematic diagram of the latch assembly inserted into the connecting shaft, in combination with Figure 7 When the thermal deformation body is deformed and expanded after being heated, the thermal deformation body will squeeze the latch 33 and drive the latch 33 to extend out of the guide cylinder 31, and then drive the latch 33 to be inserted into the connecting shaft 12.

[0071] in combination with Figure 6 When the thermal deformation body is cooled, the thermal deformation body will shrink, and the latch 33 will move back into the guide cylinder 31, thereby releasing the locking of the connecting shaft 12.

[0072] Optionally, the thermal deformation body is a structural member containing a shape memory alloy.

[0073] In the above implementation manner, the thermal deformation body is arranged as a structural member containing a shape memory alloy, so that the characteristics of the shape memory alloy can be fully utilized to realize that the thermal deformation body is deformed and expanded at high temperature and returns to the original state at low temperature.

[0074] in combination withFigure 1 Optionally, the locking device further comprises a sensor 4 and a controller 5, the sensor 4 is located in the first cylinder 11 and connected with the locking piece 22, the sensor 4 is used for detecting whether the locking piece 22 is in contact with the connecting shaft 12 and sending a signal when the locking piece 22 is in contact with the connecting shaft 12.

[0075] The controller 5 is electrically connected with the sensor 4 and the thermal deformation body respectively, the controller 5 is used for receiving the signal sent by the sensor 4 and controlling the thermal deformation body to be powered on to heat the thermal deformation body.

[0076] In the above implementation, the sensor 4 is connected with the locking piece 22 so as to detect whether the locking piece 22 is in contact with the connecting shaft 12.

[0077] The controller 5 is used for receiving the detection result of the sensor 4 and controlling the thermal deformation body to be heated according to the detection result, and then controlling the thermal deformation body to be heated and expanded to drive the bolt 33 to move out of the guide cylinder 31.

[0078] In the embodiment of the present disclosure, in order to control the thermal deformation body to be heated, the thermal deformation body can be electrically connected with the controller 5, so that the controller 5 can power on the thermal deformation body after receiving the detection result of the sensor 4, so that the thermal deformation body can be heated and expanded in the powered-on state. When it is needed to restore the thermal deformation body to the original state, the controller can cut off the current of the thermal deformation body.

[0079] In order to improve the safety of electricity use, the guide cylinder 31 is an electrical insulator. Alternatively, an insulating layer is arranged on the outer surface of the thermal deformation body.

[0080] In the embodiment of the present disclosure, the connecting shaft 12 has a through hole 120 along the radial direction of the connecting shaft 12, and the through hole 120 penetrates through the opposite two side walls of the connecting shaft 12. The bolt assembly 3 is two, and the two bolt assemblies 3 are arranged on the opposite two sides of the connecting shaft 12 with the connecting shaft 12 as the axis of symmetry, and each bolt assembly 3 is aligned with one end of the through hole 120. In this way, the two bolts 33 can be inserted into the opposite two ends of the through hole 120 synchronously, and the locking effect of the bolt assembly 3 on the connecting shaft 12 is improved.

[0081] In other examples, the bolt assembly 3 can also be other numbers, such as three, four, etc.

[0082] The working process of the locking device provided by the embodiment of the present disclosure will be briefly introduced as follows:

[0083] First, two components are connected with the first connecting assembly 1 and the second connecting assembly 2 in the locking device respectively. Then, the first cylinder 11 is controlled to slowly approach the second cylinder 21. The first cylinder 11 and the second cylinder 21 are guided by the cooperation of the guide groove and the guide block, so that the connecting shaft 12 is coaxial with the first transmission wheel 221.

[0084] Since the connecting shaft 12 is provided with external threads towards the outer wall of the end of the second cylinder 21, and the inner hole of the first transmission wheel 221 is provided with internal threads, when the connecting shaft 12 is in the inner hole of the first transmission wheel 221, the first transmission wheel 221 will rotate around the connecting shaft 12 during the gradual advancement of the connecting shaft 12. After the first transmission wheel 221 rotates, the plurality of second transmission wheels 222 located on the outer periphery of the first transmission wheel 221 will rotate synchronously during the rotation of the first transmission wheel 221, and the locking arms 223 will rotate synchronously. When the locking arms 223 contact the connecting shaft 12, the locking arms 223 can prevent the connecting shaft 12 from further moving due to the high roughness of the inner arc surface of the locking arms 223, which can provide a large friction force.

[0085] Since the locking arms 223 are also provided with sensors 4, when the locking arms 223 contact the connecting shaft 12, the sensors 4 will send an electrical signal, and the controller will control the thermal deformation body in the bolt assembly 3 to be heated and deformed to expand, thereby driving the bolt 33 to be inserted into the connecting shaft 12, achieving the locking effect.

[0086] When unlocking is needed, only the sensors 4 need to be shielded, and the thermal deformation body in the bolt assembly 3 needs to be cooled to restore the deformation. When the thermal deformation body returns to the original state, the bolt 33 will be removed from the connecting shaft 12. At this time, the first connecting assembly 1 and the second connecting assembly 2 are away from each other, the connecting shaft 12 is away from the first transmission wheel 221, the first transmission wheel 221 is reversed, the second transmission wheel 222 is rotated, the locking arm 223 is rotated and away from the connecting shaft 12, thereby achieving the unlocking.

[0087] The above only describes optional embodiments of the present disclosure and does not limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A locking device, characterized in that The locking device comprises a first connecting assembly (1) and a second connecting assembly (2); The first connecting assembly (1) comprises a first cylinder (11) and a connecting shaft (12), the connecting shaft (12) is located in the first cylinder (11), and a first end of the connecting shaft (12) is connected with one end of the first cylinder (11); The second connecting assembly (2) comprises a second cylinder (21) and a locking piece (22), the second cylinder (21) is used for abutting with a second end of the first cylinder (11), the locking piece (22) is located in the second cylinder (21) and connected with the second cylinder (21), the locking piece (22) comprises a first transmission wheel (221), a plurality of second transmission wheels (222) and a plurality of locking arms (223), the first transmission wheel (221) is used for being connected with a second end of the connecting shaft (12), and the first transmission wheel (221) can rotate synchronously when the connecting shaft (12) moves with the first cylinder (11), the plurality of second transmission wheels (222) are spaced along the circumference of the first transmission wheel (221) and located outside the circumference of the first transmission wheel (221), and each second transmission wheel (222) of the plurality of second transmission wheels (222) is engaged with the first transmission wheel (221), the plurality of locking arms (223) are arranged one by one corresponding to the plurality of second transmission wheels (222), the plurality of locking arms (223) are located outside the connecting shaft (12), and one end of each locking arm (223) of the plurality of locking arms (223) is connected with the corresponding second transmission wheel (222), and the other end of the locking arm (223) is used for being attached to the outer wall of the connecting shaft (12) to tightly hold the connecting shaft (12) and prevent the connecting shaft (12) from moving when the second transmission wheel (222) rotates.

2. The locking device of claim 1, wherein The center of the first transmission wheel (221) has an inner hole, the inner wall of the inner hole has an internal thread, and the outer wall of the second end of the connecting shaft (12) towards the second cylinder (21) has an external thread matched with the internal thread.

3. The locking device of claim 1, wherein The locking arm (223) comprises a linear arm body (2231) and an arc-shaped arm body (2232), one end of the linear arm body (2231) is connected with the center of the second transmission wheel (222) corresponding to the locking arm (223), the other end of the linear arm body (2231) is connected with one end of the arc length direction of the arc-shaped arm body (2232), and when the linear arm body (2231) is located on the straight line of the radius of the connecting shaft (12), the circumference of the arc length of the arc-shaped arm body (2232) is attached to the circumference of the connecting shaft (12).

4. A locking device according to any one of claims 1-3, characterized in that One of the first cylinder (11) and the second cylinder (21) has at least one guide groove (101), and the other has at least one guide block (102), the guide groove (101) corresponds to the guide block (102), and the guide block (102) is inserted into the corresponding guide groove (101).

5. A locking device according to any one of claims 1-3, characterized in that The locking device further comprises a latch assembly (3) located in the second cylinder (21), one end of the latch assembly (3) is connected with the second cylinder (21), and the other end of the latch assembly (3) can be telescoped relative to the one end along the radial direction of the second cylinder (21).

6. The locking device of claim 5, wherein, The latch assembly (3) comprises a guide cylinder (31), a driving member (32) and a latch (33), one end of the guide cylinder (31) is connected with the inner wall of the second cylinder (21), the other end of the guide cylinder (31) extends radially inwardly towards the second cylinder (21) and is used to contact the outer wall of the connecting shaft (12); The driving member (32) and the latch (33) are movably located in the guide cylinder (31), and the latch (33) is located on the side of the driving member (32) radially inwardly towards the first cylinder (11), the driving member (32) is used to drive the latch (33) to move along the radial direction of the first cylinder (11), and the latch (33) is used to be inserted into the connecting shaft (12).

7. The locking device of claim 6, wherein The driving member (32) is a thermal deformation body, and the outer surface of the thermal deformation body is in contact with the inner wall of the guide cylinder (31) and the latch (33) respectively.

8. The locking device of claim 7, wherein, The thermal deformation body is a structural member containing a shape memory alloy.

9. The locking device of claim 7, wherein, The locking device further comprises a sensor (4) and a controller (5), the sensor (4) is located in the first cylinder (11) and connected with the locking member (22), and the sensor (4) is used to detect whether the locking member (22) contacts the connecting shaft (12); The controller (5) is electrically connected with the sensor (4) and the thermal deformation body respectively, and the controller (5) is used to control the thermal deformation body to be powered on to heat the thermal deformation body when the sensor (4) detects that the locking member (22) contacts the connecting shaft (12).

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