Locking device

Abstract

The invention provides a locking device, and belongs 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 barrel and a connecting shaft, the connecting shaft is located in the first barrel, and the first end of the connecting shaft is connected with one end of the first barrel; the second connecting assembly comprises a second barrel and a locking piece, the second barrel is used for being in butt joint with the second end of the first barrel, and the locking piece is located in the second barrel and connected with the second barrel. The locking piece is used for being connected 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 barrel body and the second barrel body are in butt joint, and the locking piece is used for tightly holding the connecting shaft to prevent the connecting shaft from moving after being connected with the second end of the connecting shaft. The locking effect of the two parts can be improved, and the operation safety can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical equipment, and in particular relates to a locking device. Background Art

[0002] Locking devices are widely used in aerospace, railways, mechanical engineering, marine vessels and other fields. Their main function is to achieve a firm connection between two or more components by mechanical means to ensure the stability and safety of the connection during use.

[0003] In the related art, the locking device usually includes one of a snap fastener, a bolt connector, etc. When the locking device is a snap fastener, the snap ring in the snap fastener is connected to the end face of one of the two components, and the hook in the snap fastener is connected to the end of the other of the two components. When the two components need to be connected to each other, the two components are first butted together, and then the snap ring is put on the hook and clamped together with the hook. If the locking device is a bolt connector, bolt holes are respectively provided at the butt end faces of the two components. When locking, the two components are first butted together, and then the bolts are inserted into the bolt holes and the bolts are tightened to achieve a tight connection between the two.

[0004] However, when the above locking devices are used to lock and fix two components, they all need to be manually operated after the two components are docked, which makes the locking process cumbersome and is also affected by human factors, resulting in unstable locking effects and certain safety hazards in the operation. Summary of the invention

[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 disclosed embodiment provides a locking device, which includes a first connecting component and a second connecting component; the first connecting component includes 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 to one end of the first cylinder; the second connecting component includes a second cylinder and a locking piece, the second cylinder is used to dock with the second end of the first cylinder, the locking piece is located in the second cylinder and connected to the second cylinder, the locking piece is used to connect to 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 and the second cylinder are docked, and the locking piece is used to clamp the connecting shaft to prevent the connecting shaft from moving after being connected to the second end of the connecting shaft.

[0007] In another embodiment of the present disclosure, the locking member includes a first transmission wheel, a plurality of second transmission wheels and a plurality of locking arms, the first transmission wheel is used to be connected to the second end of the connecting shaft, and the first transmission wheel can rotate synchronously when the connecting shaft follows the movement of the first cylinder; the plurality of second transmission wheels are spaced at the outer periphery of the first transmission wheel along the circumference of the first transmission wheel, and each of the plurality of second transmission wheels is meshed with the first transmission wheel; the plurality of locking arms are arranged in a one-to-one correspondence with 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 the locking arm is used to fit with the outer wall of the connecting shaft to hold the connecting shaft when the second transmission wheel rotates.

[0008] In another implementation of the present disclosure, the center of the first transmission wheel has an inner hole, the inner wall of the inner hole has an internal thread, and the outer wall of the connecting shaft facing the second end of the second cylinder has an external thread matching the internal thread.

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

[0010] In another implementation of the present disclosure, one of the end of the first cylinder facing the second cylinder and the end of the second cylinder facing the first cylinder has at least one guide groove, and the other has at least one guide block, the guide grooves correspond to the guide blocks one by one, and the guide blocks are used to be inserted into the corresponding guide grooves.

[0011] In another embodiment of the present disclosure, the locking device further comprises a latch assembly, wherein the latch assembly is located in the second cylinder, one end of the latch assembly is connected to the second cylinder, and the other end of the latch assembly can be extended and retracted along the radial direction of the second cylinder relative to one end thereof.

[0012] In another embodiment of the present disclosure, the latch assembly includes 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, and the other end of the guide cylinder extends radially inward toward the second cylinder and is used to contact the outer wall of the connecting shaft; the driving member and the latch are both movably located in the guide cylinder, and the latch is located on the radially inward side of the driving member toward the first cylinder, the driving member is used to drive the latch to move radially along the first cylinder, and the latch is used to be inserted into the connecting shaft.

[0013] In yet another implementation of the present disclosure, the driving member is a thermally deformable body, and an outer surface of the thermally deformable body is in contact with an inner wall of the guide cylinder and the latch, respectively.

[0014] In yet another implementation of the present disclosure, the thermally deformable body is a structural member comprising a shape memory alloy.

[0015] In another implementation of the present disclosure, the locking device also includes a sensor and a controller, the sensor is located in the first cylinder and connected to the locking piece, the sensor is used to detect whether the locking piece is in contact with 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 energized so as to heat the thermal deformation body when the sensor detects that the locking piece is in contact with the connecting shaft.

[0016] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0017] Since the first connecting assembly includes a first cylinder and a connecting shaft, one end of the first cylinder can be coaxially connected to the end of the first component, and the connecting shaft is arranged away from the first component to facilitate the subsequent cooperation of the connecting shaft with the second connecting assembly. Since the second connecting assembly includes a second cylinder and a locking member, one end of the second cylinder can be coaxially connected to the end of the second component, and the locking member is arranged toward the connecting shaft. Then, the first cylinder is controlled to move toward the second cylinder, so that the connecting shaft can synchronously move toward the locking member and connect with the locking member.

[0018] When the second end of the connecting shaft is connected to the locking piece, the locking piece can rotate, and the locking piece can hold the connecting shaft while rotating, thereby limiting the movement of the connecting shaft, so that the connecting shaft can be stably connected to the locking piece without separation, thereby realizing the connection between the first cylinder and the second cylinder, and finally realizing the fixed connection between the two components.

[0019] That is to say, the above locking device can automatically connect the two components when the two components are close to each other and docked together through the cooperation between the connecting shaft and the locking member, thereby improving the locking efficiency. At the same time, it can avoid manual operation of the locking device, improve the locking effect of the two components, and also reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a schematic diagram of the structure of a locking device provided in an embodiment of the present disclosure;

[0022] Figure 2 yes Figure 1 A schematic diagram of the structure of the first connection component;

[0023] Figure 3 yes Figure 1 A schematic diagram of the structure of the second connection component;

[0024] Figure 4 yes Figure 3 A schematic diagram of the structure of the middle locking member;

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure in which the middle locking member holds the connecting shaft tightly;

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

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

[0028] The symbols in the figure mean the following:

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

[0030] 2. second connecting assembly; 21. second cylinder; 22. locking member; 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 member; 33. Latch;

[0032] 4. Sensor;

[0033] 5. Controller;

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

[0035] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0036] The embodiment of the present disclosure provides a locking device, which is used to butt and fix two parts with relative motion together, wherein both parts can be shafts.

[0037] Figure 1 is a schematic diagram of the structure of the locking device provided in the embodiment of the present disclosure, such as Figure 1 As shown, the locking device includes a first connecting component 1 and a second connecting component 2 .

[0038] Figure 2 yes Figure 1 The schematic diagram of the structure of the first connection component in Figure 2 The first connecting assembly 1 includes a first cylinder 11 and a connecting shaft 12. The first cylinder 11 is used to connect with the first component and can move with the first component toward the second component. The connecting shaft 12 is located in the first cylinder 11, and the first end of the connecting shaft 12 is connected to one end of the first cylinder 11. The connecting shaft 12 can move together with the first cylinder 11 along the axial direction of the connecting shaft 12.

[0039] Figure 3 yes Figure 1 The schematic diagram of the structure of the second connection component in Figure 3 The second connecting assembly 2 includes a second cylinder 21 and a locking piece 22. The second cylinder 21 is used to dock with the second end of the first cylinder 11. The locking piece 22 is located in the second cylinder 21 and connected to the second cylinder 21. The locking piece 22 is used to be connected to 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 docked. The locking piece 22 is used to hold the connecting shaft 12 tightly to prevent the connecting shaft 12 from moving after being connected to the second end of the connecting shaft 12.

[0040] Since the first connecting assembly 1 includes a first cylinder 11 and a connecting shaft 12, one end of the first cylinder 11 can be coaxially connected to 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 matched with the second connecting assembly 2 later. Since the second connecting assembly 2 includes a second cylinder 21 and a locking member 22, one end of the second cylinder 21 can be coaxially connected to the end of the second component, and the locking member 22 is arranged toward the connecting shaft 12. Then, the first cylinder 11 is controlled to move toward the second cylinder 21, so that the connecting shaft 12 can move toward the locking member 22 synchronously and connect to the locking member 22. When the second end of the connecting shaft 12 is connected to the locking member 22, the locking member 22 can rotate, and the locking member 22 can hold the connecting shaft 12 while rotating, thereby limiting the connecting shaft 12 from moving, so that the connecting shaft 12 can be stably connected to the locking member 22 without separation, thereby realizing the connection between the first cylinder 11 and the second cylinder 21, and finally realizing the fixed connection of the two components.

[0041] That is to say, the above locking device can automatically connect the two components when the two components are close to each other and docked together through the mutual cooperation between the connecting shaft 12 and the locking member 22, thereby improving the locking efficiency. At the same time, it can avoid manual operation of the locking device, thereby improving the locking effect of the two components and reducing safety hazards.

[0042] Figure 4 yes Figure 3 Schematic diagram of the structure of the locking part, combined with Figure 4 Optionally, the locking member 22 includes 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 to the second end of the connecting shaft 12. The first transmission wheel 221 can rotate synchronously when the connecting shaft 12 moves following the first cylinder 11. The plurality of second transmission wheels 222 are spaced at the outer periphery of the first transmission wheel 221 along the circumference of the first transmission wheel 221, and each of the plurality of second transmission wheels 222 is meshed with the first transmission wheel 221.

[0043] Multiple locking arms 223 are arranged in one-to-one correspondence with multiple second transmission wheels 222. Multiple locking arms 223 are located outside the connecting shaft 12. One end of each locking arm 223 is connected to the corresponding second transmission wheel 222. The other end of the locking arm 223 is used to fit with the outer wall of the connecting shaft 12 to 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 be connected to the connecting shaft 12, so that after being connected to the connecting shaft 12, it can rotate while the connecting shaft 12 moves axially. Multiple second transmission wheels 222 are used to mesh with the first transmission wheel 221. When the first transmission wheel 221 rotates, it can synchronously drive each second transmission wheel 222 to rotate. Each locking arm 223 is used to be connected to the corresponding second transmission wheel 222. When the second transmission wheel 222 rotates, the locking arm 223 can rotate synchronously with the second transmission wheel 222, and then after the rotation, the connecting shaft 12 is tightly held and the connecting shaft 12 is limited, so that the connecting shaft 12 and the first transmission wheel 221 are stably connected together.

[0045] In other examples, the locking member 22 may also have other structures, such as a connecting sleeve connected to the second cylinder 21 and a plurality of electric telescopic rods arranged around 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 rod is controlled to extend and the connecting shaft 12 inserted into the connecting shaft 12 is limited, thereby realizing the connection between the first cylinder 11 and the second cylinder 21.

[0046] 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 connecting shaft 12 facing the second end of the second cylinder 21 has an external thread matching 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 can provide an accommodation space for the second end of the connecting shaft 12 facing the second cylinder 21, so that the connecting shaft 12 can be inserted into the first transmission wheel 221. In addition, an internal thread is provided in the inner wall of the inner hole, so that the inner hole can be threadedly connected with the connecting shaft 12. In addition, when the connecting shaft 12 moves axially, it can also drive the first transmission wheel 221 to rotate.

[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 can be reduced as much as possible, so that when the connecting shaft 12 moves in a straight line, it can also drive the first transmission wheel 221 to rotate synchronously.

[0049] In other examples, a spiral groove may be provided in the inner wall of the inner hole, a slider may be provided on the outer wall of the second end of the connecting shaft 12, the slider is connected to the outer wall of the connecting shaft 12, and the slider is located in the groove, and the slider is in contact with the groove wall of the groove. In this way, when the connecting shaft 12 moves axially, the first transmission wheel 221 may be driven to rotate synchronously under the action of the slider and the groove.

[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. At the same time, a rack extending along the axis of the connecting shaft 12 is arranged on the outer wall of the second end of the connecting shaft 12. The rack is meshed with the transmission gear. The transmission gear is meshed with the bevel gear. The axis of the bevel gear is perpendicular to the transmission gear. The first transmission wheel 221 is coaxially fixed to 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] Continue to combine Figure 4 Optionally, the locking arm 223 includes 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, and the other end of the linear arm body 2231 is connected to one end of the arc-shaped arm body 2232 in the arc length direction. When the linear arm body 2231 is located on the straight line where the radius of the connecting shaft 12 is located, the circumference of the arc length of the arc-shaped arm body 2232 is in contact with the circumference of the connecting shaft 12.

[0052] In the above implementation, the locking arm 223 is configured as a linear arm body 2231 and an arcuate arm body 2232 , and the arcuate arm body 2232 and the second transmission wheel 222 can be fixedly connected as a whole through the linear arm body 2231 .

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

[0054] Exemplarily, the inner arc surface of the linear arm body 2231 may be provided with a plurality of grooves or protrusions, ridges, etc. for increasing friction.

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

[0056] In the disclosed embodiment, there are four second transmission wheels 222, and the four second transmission wheels 222 are evenly arranged along the circumference of the first transmission wheel 221. Correspondingly, there are also four locking arms 223. In this way, the circumference of the connecting shaft 12 can be clamped in four directions by the four locking arms 223, thereby improving the clamping efficiency.

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

[0058] See again Figure 1 Optionally, one of the end of the first cylinder 11 facing the second cylinder 21 and the end of the second cylinder 21 facing the first cylinder 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 to be inserted into the corresponding guide groove 101.

[0059] In the above implementation, one of the first cylinder 11 and the second cylinder 21 is provided with a guide groove 101, and the other is provided with a guide block 102, so that the docking of the first cylinder 11 and the second cylinder 21 can be guided and limited by the cooperation of the guide block 102 and the guide groove 101, so that the first cylinder 11 and the second cylinder 21 remain coaxial, further improving the docking effect.

[0060] In the disclosed embodiment, in order to further improve the positioning effect, a plurality of guide grooves 101 are provided in one end surface of the first barrel 11 facing the second barrel 21 along the circumference of the first barrel 11, and a guide block 102 is defined between two adjacent guide grooves 101. Correspondingly, a plurality of guide grooves 101 are also provided in one end surface of the second barrel 21 facing the first barrel 11 along the circumference of the second barrel 21, and a guide block 102 is also defined between two adjacent guide grooves 101 in the second barrel 21. Any guide block 102 in the second barrel 21 can be inserted into one of the guide grooves 101 in the first barrel 11, and any guide block 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 in shape, and the guide block 102 is also triangular in shape, and the tip of the guide block 102 is away from the cylinder where it is located.

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

[0063] Optionally, the locking device also includes a latch assembly 3, which is located in the second cylinder 21, and one end of the latch assembly 3 is connected to the second cylinder 21, and the other end of the latch assembly 3 can be extended and retracted along the radial direction of the second cylinder 21 relative to one end of itself, and the other end of the latch assembly 3 is used to be inserted into the connecting shaft 12.

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

[0065] Figure 6 This is a schematic diagram of the structure of the latch assembly, combined with Figure 6 Optionally, the latch assembly 3 includes a guide cylinder 31, a driving member 32 and a latch 33, one end of the guide cylinder 31 is connected to the inner wall of the second cylinder 21, and the other end of the guide cylinder 31 extends radially inward toward the second cylinder 21 and is used to contact the outer wall of the connecting shaft 12.

[0066] The driving member 32 and the latch 33 are both movably located in the guide cylinder 31, and the latch 33 is located on the radially inward side of the driving member 32 toward the first cylinder 11. The driving member 32 is connected to the first end of the latch 33 to drive the latch 33 to move along the radial direction of the first cylinder 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, the guide cylinder 31 is used to provide a mounting base for the driving member 32 and the latch 33. 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 thermally deformable body, and the outer surface of the thermally deformable body is in contact with the inner wall of the guide cylinder 31 and the latch 33. The thermally deformable body can deform and expand after being heated, and return to its original shape after cooling.

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

[0070] Figure 7 This is a schematic diagram of the structure of the bolt assembly inserted into the connecting shaft, combined with Figure 7 When the thermally deformable body deforms and expands after being heated, the thermally deformable body will squeeze the plug 33 and drive the plug 33 to extend out of the guide cylinder 31, and then drive the plug 33 to be inserted into the connecting shaft 12.

[0071] Combination Figure 6 When the thermal deformation body is cooled, it will shrink, and the latch 33 will move back into the guide cylinder 31, thereby releasing the lock on the connecting shaft 12.

[0072] Optionally, the thermally deformable body is a structural member comprising a shape memory alloy.

[0073] In the above implementation, the thermal deformation body is configured as a structural member containing a shape memory alloy, so that the characteristics of the shape memory alloy can be fully utilized to realize the thermal deformation body to deform and expand at high temperature and recover to its original shape at low temperature.

[0074] Recombination Figure 1 Optionally, the locking device also includes a sensor 4 and a controller 5. The sensor 4 is located in the first cylinder 11 and is connected to the locking member 22. The sensor 4 is used to detect whether the locking member 22 is in contact with the connecting shaft 12, and sends a signal when the locking member 22 is in contact with the connecting shaft 12.

[0075] The controller 5 is electrically connected to the sensor 4 and the thermal deformation body respectively. The controller 5 is used to receive the signal sent by the sensor 4 and control the thermal deformation body to be energized so as to heat the thermal deformation body.

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

[0077] The controller 5 is used to receive the detection result of the sensor 4 and control the heat of the thermal deformation body according to the detection result, thereby controlling the thermal deformation body to expand due to heat so as to drive the latch 33 to move out of the guide tube 31 .

[0078] In the disclosed embodiment, in order to control the heat of the thermal deformation body, the thermal deformation body can be electrically connected to the controller 5, so that the controller 5 can energize 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 energized state. When the thermal deformation body needs to be restored to its original state, the current of the thermal deformation body can be cut off by the controller.

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

[0080] In the disclosed embodiment, the connecting shaft 12 has a through hole 120 along its radial direction, and the through hole 120 passes through the opposite side walls of the connecting shaft 12. There are two latch assemblies 3, which are symmetrically arranged on the opposite sides of the connecting shaft 12 with the connecting shaft 12 as the axis, and each latch assembly 3 is aligned with one end of the through hole 120. In this way, the two latches 33 can be synchronously inserted into the opposite ends of the through hole 120, thereby improving the locking effect of the latch assembly 3 on the connecting shaft 12.

[0081] In other examples, the number of the latch assemblies 3 may be other numbers, such as three, four, etc.

[0082] The following briefly introduces the working process of the locking device provided in the embodiment of the present disclosure:

[0083] First, the two components are connected to 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 outer wall of the end of the connecting shaft 12 facing the second cylinder 21 is provided with an external thread, and the inner hole of the first transmission wheel 221 is provided with an internal thread, when the connecting shaft 12 is in the inner hole of the first transmission wheel 221, the first transmission wheel 221 will be driven to rotate around the connecting shaft 12 during the process of the connecting shaft 12 gradually advancing. 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 can rotate synchronously during the rotation of the first transmission wheel 221, and drive the locking arm 223 to rotate synchronously. When the locking arm 223 contacts the connecting shaft 12, the locking arm 223 can prevent the connecting shaft 12 from moving further due to the high roughness of the inner arc surface of the locking arm 223, which can provide a large friction force.

[0085] Since the locking arm 223 is also provided with a sensor 4, when the locking arm 223 contacts the connecting shaft 12, the sensor 4 will send out an electrical signal, and after receiving the electrical signal, the controller controls the thermal deformation body in the latch assembly 3 to deform and expand due to heat, thereby driving the latch 33 to be inserted into the connecting shaft 12, thereby achieving a locking effect.

[0086] When unlocking is required, it is only necessary to shield the sensor 4 and control the thermal deformation body in the latch assembly 3 to cool down and recover its deformation. When the thermal deformation body recovers to its original state, the latch 33 will be moved out of the connecting shaft 12. At this time, the first connecting assembly 1 and the second connecting assembly 2 are separated from each other, and the connecting shaft 12 is separated from the first transmission wheel 221, driving the first transmission wheel 221 to reverse, and driving the second transmission wheel 222 to rotate, and the locking arm 223 rotates and moves away from the connecting shaft 12, thereby achieving unlocking.

[0087] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, 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 component (1) and a second connecting component (2); The first connecting assembly (1) comprises a first cylinder (11) and a connecting shaft (12), wherein the connecting shaft (12) is located in the first cylinder (11), and a first end of the connecting shaft (12) is connected to one end of the first cylinder (11); The second connecting assembly (2) comprises a second cylinder (21) and a locking member (22); the second cylinder (21) is used for docking with the second end of the first cylinder (11); the locking member (22) is located in the second cylinder (21) and is connected to the second cylinder (21); the locking member (22) is used for connecting with the second end of the connecting shaft (12) and rotating relative to the connecting shaft (12) under the drive of the connecting shaft (12) when the first cylinder (11) and the second cylinder (21) are docked; and the locking member (22) is used for, after being connected with the second end of the connecting shaft (12), clamping the connecting shaft (12) to prevent the connecting shaft (12) from moving.

2. The locking device according to claim 1, characterized in that: The locking member (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 to the 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 apart on the outer periphery of the first transmission wheel (221) along the circumferential direction of the first transmission wheel (221), and each of the plurality of second transmission wheels (222) is meshed with the first transmission wheel (221); The multiple locking arms (223) are arranged in one-to-one correspondence with the multiple second transmission wheels (222); the multiple locking arms (223) are located outside the connecting shaft (12); and one end of each locking arm (223) in the multiple locking arms (223) is connected to the corresponding second transmission wheel (222); the other end of the locking arm (223) is used to fit with the outer wall of the connecting shaft (12) to hold the connecting shaft (12) when the second transmission wheel (222) rotates.

3. The locking device according to claim 2, characterized in that: 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) facing the second cylinder (21) has an external thread matching the internal thread.

4. The locking device according to claim 2, characterized in that: The locking arm (223) comprises a linear arm body (2231) and an arcuate 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 arcuate arm body (2232) in the arc length direction; and when the linear arm body (2231) is located on the straight line where the radius of the connecting shaft (12) is located, the circumference where the arc length of the arcuate arm body (2232) is located is in contact with the circumference of the connecting shaft (12).

5. The locking device according to any one of claims 1 to 4, characterized in that: One of the end of the first cylinder (11) facing the second cylinder (21) and the end of the second cylinder (21) facing the first cylinder (11) has at least one guide groove (101), and the other has at least one guide block (102), the guide grooves (101) and the guide blocks (102) corresponding one to one, and the guide blocks (102) are used to be inserted into the corresponding guide grooves (101).

6. The locking device according to any one of claims 1 to 4, characterized in that: The locking device further comprises a latch assembly (3), wherein the latch assembly (3) is located in the second cylinder (21), and one end of the latch assembly (3) is connected to the second cylinder (21), and the other end of the latch assembly (3) is capable of extending and retracting relative to one end thereof along the radial direction of the second cylinder (21).

7. The locking device according to claim 6, characterized in that: 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 to the inner wall of the second cylinder (21); the other end of the guide cylinder (31) extends radially inwardly toward the second cylinder (21) and is used to contact the outer wall of the connecting shaft (12); The driving member (32) and the latch pin (33) are both movably located in the guide cylinder (31), and the latch pin (33) is located on the radially inward side of the driving member (32) toward the first cylinder (11); the driving member (32) is used to drive the latch pin (33) to move radially along the first cylinder (11), and the latch pin (33) is used to be inserted into the connecting shaft (12).

8. The locking device according to claim 7, characterized in that: The driving member (32) is a thermally deformable body, and the outer surface of the thermally deformable body is in contact with the inner wall of the guide cylinder (31) and the latch (33) respectively.

9. The locking device according to claim 8, characterized in that: The thermally deformable body is a structural member including a shape memory alloy.

10. The locking device according to claim 8, characterized in that: The locking device further comprises a sensor (4) and a controller (5), wherein the sensor (4) is located in the first cylinder (11) and is connected to the locking member (22), and the sensor (4) is used to detect whether the locking member (22) is in contact with the connecting shaft (12); The controller (5) is electrically connected to the sensor (4) and the thermal deformation body, respectively. The controller (5) is used to control the thermal deformation body to be energized so as to heat the thermal deformation body when the sensor (4) detects that the locking member (22) is in contact with the connecting shaft (12).

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