Automatic locking device

Abstract

The invention discloses an automatic locking device which comprises a mounting cylinder, a first locking mechanism, a second locking mechanism and a locking mechanism, a containing cavity is formed in the mounting cylinder, and a first hole is formed in one end of the mounting cylinder in the first direction; the plug pin is movably arranged in the containing cavity between an initial position and an extending position, and a containing groove is formed in the plug pin; the connecting rod assembly is arranged in the containing groove, and the connecting rod assembly has an initial state and a limiting state; the driving assembly is connected with the plug pin and the connecting rod assembly, the automatic locking device can be switched between a locking state and an unlocking state, in the locking state, the plug pin is located at the stretching-out position, in the stretching-out position, one end of the plug pin penetrates through the first hole to stretch out of the containing cavity, and the connecting rod assembly is in a limiting state and located on the outer side of the containing cavity; a part of the connecting rod assembly extends out of the containing groove in the radial direction of the plug pin so as to be used for locking the to-be-locked workpiece. According to the automatic locking device, the workpiece to be locked can be automatically locked, and the structure is simple.

Description

Technical Field

[0001] The present invention relates to the field of mechanical control technology, and in particular to an automatic locking device. Background Art

[0002] On many mechanical equipment, it is necessary to use a device that can achieve automatic locking to lock some workpieces. In the related technology, the locking structure of the automatic locking device is relatively complex, which makes the product design and production difficult. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide an automatic locking device, the structure of which is relatively simple.

[0004] According to the automatic locking device of the present invention, it includes: a mounting cylinder, a receiving cavity is formed in the mounting cylinder, and a first hole connected to the receiving cavity is formed at one end of the mounting cylinder in the first direction; a latch, the latch is movably arranged in the receiving cavity between an initial position and an extended position along the first direction, and a receiving groove is formed on the latch; a connecting rod assembly, the connecting rod assembly is arranged in the receiving groove, and the connecting rod assembly has an initial state and a limit state; a driving assembly, the driving assembly is connected to the latch and the connecting rod assembly, and is used to drive the latch to move between the initial position and the extended position, and is used to drive the connecting rod assembly between the initial state and the limit state Switch between, wherein the automatic locking device can switch between a locked state and an unlocked state, in the unlocked state, the latch is located at the initial position, in the initial position, the latch is received in the accommodating cavity, and the connecting rod assembly is in the initial state, in the initial state, the connecting rod assembly is received in the accommodating groove; in the locked state, the latch is located at the extended position, in the extended position, one end of the latch extends out of the accommodating cavity through the first hole, the connecting rod assembly is in a limited state and is located outside the accommodating cavity, in the limited state, a part of the connecting rod assembly extends out of the accommodating groove along the radial direction of the latch for locking the workpiece to be locked.

[0005] According to the automatic locking device of the present invention, the driving assembly drives the connecting rod assembly to change state, and the driving assembly drives the pin to change position, so that automatic locking of the workpiece to be locked can be achieved, and the structure of the connecting rod assembly is relatively simple, which can reduce the difficulty of product design and production.

[0006] According to some embodiments of the present invention, the connecting rod assembly includes: a first rod and a second rod, the first rod is rotatably connected to the second rod, an end of the first rod away from the second rod is rotatably connected to the driving assembly, and an end of the second rod away from the first rod is rotatably connected to the pin.

[0007] According to some embodiments of the present invention, there are a plurality of connecting rod assemblies, the plurality of connecting rod assemblies are arranged at intervals in the circumferential direction of the latch, and the plurality of connecting rod assemblies are arranged symmetrically with respect to the axis of the latch.

[0008] According to some embodiments of the present invention, the driving assembly includes a push rod and a first driving motor, the first driving motor is connected to one end of the push rod to drive the push rod to move along the first direction, a through hole connected to the accommodating groove is formed on the pin, and the other end of the push rod passes through the through hole and is connected to the connecting rod assembly.

[0009] According to some embodiments of the present invention, the drive assembly further includes: a first elastic member, the first elastic member being connected between one end of the pin where the through hole is formed and an inner wall of the accommodating cavity on a side away from the first hole, and in the initial position, the first elastic member is in a compressed state.

[0010] According to some embodiments of the present invention, the driving assembly further includes: a second elastic member, the second elastic member is disposed in the accommodating groove, the second elastic member is connected between one end of the connecting rod assembly connected to the push rod and the periphery of the through hole, the elastic coefficient of the first elastic member is greater than the elastic coefficient of the second elastic member, the first elastic member and the second elastic member are both mounted on the push rod, and in the initial position, the second elastic member is in a compressed state.

[0011] According to some embodiments of the present invention, one end of the latch having the through hole is formed with a limiting boss extending outward along the axial direction of the latch, and in the extended position, the limiting boss is located in the accommodating cavity and abuts against the circumference of the first hole.

[0012] According to some embodiments of the present invention, a slider is provided at one end of the push rod connected to the connecting rod assembly, and a mounting groove is provided on the slider. The mounting groove corresponds to the connecting rod assembly one by one, and the connecting rod assembly is rotatably connected to the inner wall of the mounting groove.

[0013] According to some embodiments of the present invention, the automatic locking device also includes: a fixed frame, a movable frame and a second driving motor, the mounting tube is disposed on the movable frame, the movable frame is movably disposed on the fixed frame along the first direction, and the second driving motor is connected to the movable frame to drive the movable frame to move relative to the fixed frame in the first direction.

[0014] According to some embodiments of the present invention, a rack extending along the first direction is provided on the fixed frame, and the automatic locking device also includes: a driving worm and a driving turbine, the driving worm is connected between the second driving motor and the driving turbine, and the driving turbine is meshed with the rack.

[0015] According to some embodiments of the present invention, the fixed frame is further provided with a slide rail, the slide rail is formed with a sliding protrusion extending along the first direction, the movable frame is formed with a slide groove extending along the first direction, and the sliding protrusion is fitted in the slide groove.

[0016] According to some embodiments of the present invention, the automatic locking device also includes: a first pressure sensor, a second pressure sensor and a third pressure sensor, the first pressure sensor is arranged on the fixed frame, the first pressure sensor is suitable for detecting the pressure between the workpiece to be locked and the fixed frame, the second pressure sensor and the third pressure sensor are arranged in the accommodating cavity, and are arranged at intervals in the first direction, in the initial position, the second pressure sensor is in contact with the pin, and in the extended position, the pin is in contact with the third pressure sensor; a controller, the controller is electrically connected to the first pressure sensor, the second pressure sensor and the third pressure sensor.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an automatic locking device and a workpiece to be locked according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of an automatic locking device and a workpiece to be locked according to another embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A cross-sectional view of the automatic locking device and the workpiece to be locked shown in ;

[0021] Figure 4 is a cross-sectional view of an automatic locking device according to an embodiment of the present invention;

[0022] Figure 5 is a cross-sectional view of an automatic locking device according to another embodiment of the present invention;

[0023] Figure 6 is a cross-sectional view of a latch according to an embodiment of the present invention;

[0024] Figure 7is a cross-sectional view of a mounting cylinder according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100. Automatic locking device;

[0027] 10. Mounting cylinder; 11. Accommodating chamber; 12. First hole; 13. Second hole;

[0028] 20. latch; 21. receiving groove; 22. through hole; 23. fixing block; 24. limiting boss;

[0029] 30. connecting rod assembly; 31. first rod; 32. second rod;

[0030] 40. Push rod; 41. First drive motor; 42. Slider; 43. Drive nut; 44. Cage;

[0031] 50. first elastic member; 51. second elastic member;

[0032] 60. Fixed frame; 61. Rack;

[0033] 70, movable frame; 71, second driving motor; 72, driving worm; 721, worm bracket; 73, driving turbine; 731, turbine bracket; 74, sliding block;

[0034] 80. Slide rail;

[0035] 200. Workpiece to be locked. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Reference below Figure 1-Figure 7 An automatic locking device 100 according to an embodiment of the present invention is described.

[0038] like Figure 1-Figure 7 As shown, the automatic locking device 100 according to the embodiment of the present invention includes: a mounting cylinder 10, a latch pin 20, a connecting rod assembly 30 and a driving assembly.

[0039] Specifically, a accommodating cavity 11 is formed in the mounting tube 10, and a first hole 12 communicating with the accommodating cavity 11 is formed at one end of the mounting tube 10 in the first direction. The latch 20 is movably arranged in the accommodating cavity 11 between an initial position and an extended position along the first direction. A accommodating groove 21 is formed on the latch 20, and a connecting rod assembly 30 is arranged in the accommodating groove 21. The connecting rod assembly 30 has an initial state and a limit state. The driving assembly is connected to the latch 20 and the connecting rod assembly 30, and is used to drive the latch 20 to move between the initial position and the extended position, and is used to drive the connecting rod assembly 30 to switch between the initial state and the limit state.

[0040] Among them, the automatic locking device 100 can switch between a locked state and an unlocked state. In the unlocked state, the latch 20 is located in the initial position. In the initial position, the latch 20 is received in the accommodating cavity 11. The connecting rod assembly 30 is in the initial state. In the initial state, the connecting rod assembly 30 is received in the accommodating groove 21. In the locked state, the latch 20 is located in the extended position. In the extended position, one end of the latch 20 extends out of the accommodating cavity 11 through the first hole 12. The connecting rod assembly 30 is in a limited state and is located on the outside of the accommodating cavity 11. In the limited state, a part of the connecting rod assembly 30 extends out of the accommodating groove 21 along the radial direction of the latch 20 to lock the workpiece 200 to be locked.

[0041] A matching hole is formed on the workpiece 200 to be locked. During the operation of the automatic locking device 100, the automatic locking device 100 in the unlocked state is placed next to the workpiece 200 to be locked, and the first hole 12 is opposite to the matching hole on the workpiece 200 to be locked in the first direction. During the process of locking the workpiece 200 to be locked, the driving component drives the bolt 20 to move from the initial position to the extended position. During this process, the bolt 20 gradually passes through the matching hole on the workpiece 200 to be locked. At the same time, the driving component drives the connecting rod assembly 30 to change from the initial state to the limited state. When the bolt 20 reaches the extended position, the connecting rod assembly 30 switches to the limited state, and the automatic locking device 100 enters the locked state. A part of the connecting rod assembly 30 extends out of the receiving groove 21 along the radial direction of the bolt 20. In this way, in the first direction, the connecting rod assembly 30 can prevent the bolt 20 from being separated from the matching hole on the workpiece 200 to be locked, thereby achieving the locking of the workpiece 200 to be locked.

[0042] It can be understood that the structure of the connecting rod assembly 30 is relatively simple, and it is also relatively easy to change the state of the connecting rod assembly 30, so that the difficulty of product design and production can be reduced during the product design and production process.

[0043] According to the automatic locking device 100 of the embodiment of the present invention, the driving component drives the connecting rod assembly 30 to change the state, and the driving component drives the pin 20 to change the position, so that the automatic locking of the locking workpiece 200 can be achieved, and the structure of the connecting rod assembly 30 is relatively simple, which can reduce the difficulty of product design and production.

[0044] In some embodiments of the present invention, Figure 3-Figure 5 As shown, the connecting rod assembly 30 includes: a first rod 31 and a second rod 32, the first rod 31 and the second rod 32 are rotatably connected, one end of the first rod 31 away from the second rod 32 is rotatably connected to the driving assembly, and one end of the second rod 32 away from the first rod 31 is rotatably connected to the latch 20. In the initial state, the first rod 31 and the second rod 32 are both located in the receiving groove 21, and in the limited state, the first rod 31 and the second rod 32 are relatively folded in the first direction, so that the connection between the first rod 31 and the second rod 32 will extend out of the receiving groove 21 along the radial direction of the latch 20, thereby realizing the change of the connecting rod assembly 30 from the initial state to the limited state, and the double connecting rod structure is relatively simple, which can further reduce the difficulty of production and product design.

[0045] In some embodiments of the present invention, there are multiple connecting rod assemblies 30, for example, there may be two, three or four connecting rod assemblies 30, and the multiple connecting rod assemblies 30 are arranged at intervals in the circumferential direction of the latch 20. Thus, each connecting rod assembly 30 can limit the position of the latch 20 on the workpiece 200 to be locked, thereby improving the reliability of locking.

[0046] like Figure 4 and Figure 5 As shown, the plurality of connecting rod assemblies 30 are symmetrically arranged relative to the axis of the bolt 20. In this way, during the movement of the bolt 20, the connecting rod assemblies 30 exert a more uniform force on the bolt 20, thereby improving the stability of the automatic locking device 100 during operation and reducing the probability of the automatic locking device 100 failing due to the deviation of the bolt 20.

[0047] In some embodiments of the present invention, Figure 4 and Figure 5As shown, the driving assembly includes a push rod 40 and a first driving motor 41. The first driving motor 41 is connected to one end of the push rod 40 to drive the push rod 40 to move in the first direction. A through hole 22 communicating with the receiving groove 21 is formed on the latch 20. The other end of the push rod 40 passes through the through hole 22 and is connected to the connecting rod assembly 30. In other words, during the operation of the automatic locking device 100, the first driving motor 41 drives the connecting rod assembly 30 to change its state through the push rod 40. In this way, the structure of the driving assembly is relatively simple, and the transmission structure between the driving assembly and the connecting rod assembly 30 is also relatively simple, which can further reduce the difficulty of product design and production. Among them, the first driving motor 41 has a fast response speed, which can improve the response speed of the automatic locking device 100.

[0048] Preferably, if Figure 7 As shown, a second hole 13 is formed at one end of the mounting tube 10 away from the first hole 12, and a retaining frame 44 is provided at one end of the mounting tube 10 away from the first hole 12. The retaining frame 44 is formed with a plurality of retaining holes arranged at intervals and opposite to each other in the first direction, extending through the second hole 13 to the accommodating cavity 11 and passing through the plurality of retaining holes in sequence.

[0049] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the drive assembly also includes: a first elastic member 50, which is connected between one end of the latch 20 where the through hole 22 is formed and the inner wall of the accommodating cavity 11 on one side away from the first hole 12. In the initial position, the first elastic member 50 is in a compressed state.

[0050] In this way, in the initial position, the first elastic member 50 applies a thrust to the latch pin 20 in the direction of the first hole 12, so that the latch pin 20 generates a pulling force on the connecting rod assembly 30. In the process of the latch pin 20 moving from the initial position to the extended position, the first driving motor 41 drives the push rod 40 to gradually move toward the first hole 12 and extend out of the first hole 12. At the same time, the first elastic member 50 pushes the push rod 40 to gradually move toward the first hole 12 and extend out of the first hole 12. Under the pulling force of the latch pin 20, the connecting rod assembly 30 can be in a straightened state between the latch pin 20 and the push rod 40. When the latch pin 20 is limited in the first direction or the compression deformation of the first elastic member 50 ends, the connecting rod assembly 30 has extended out of the matching hole of the workpiece 200 to be locked. The push rod 40 continues to move in the first direction, which will drive the connecting rod assembly 30 to fold in the first direction, so that a part of the connecting rod assembly 30 extends out of the receiving groove 21 along the radial direction of the latch pin 20. Thus, the automatic locking state can be changed from the unlocked state to the locked state.

[0051] In the process of releasing the locking state of the automatic locking device 100, the first driving motor 41 drives the push rod 40 in the first direction in the opposite direction, and the push rod 40 pulls the connecting rod assembly 30 to gradually straighten the folded connecting rod assembly 30 in the first direction and store it in the receiving groove 21. After the connecting rod assembly 30 is straightened, the push rod 40 pulls the latch 20 through the connecting rod assembly 30 to gradually retract it to the receiving cavity 11 in the first direction, and the latch 20 gradually compresses the first elastic member 50. When the latch 20 returns to the initial position, the automatic locking device 100 returns to the unlocked state. In this way, the automatic locking device 100 can be changed from the locked state to the unlocked state.

[0052] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the driving assembly also includes: a second elastic member 51, the second elastic member 51 is arranged in the accommodating groove 21, the second elastic member 51 is connected between one end of the connecting rod assembly 30 connected to the push rod 40 and the periphery of the through hole 22, the elastic coefficient of the first elastic member 50 is greater than the elastic coefficient of the second elastic member 51, the first elastic member 50 and the second elastic member 51 are both sleeved on the push rod 40, and in the initial position, the second elastic member 51 is in a compressed state.

[0053] During the process of the latch 20 extending out of the accommodating cavity 11, since the elastic coefficient of the first elastic member 50 is greater than the elastic coefficient of the second elastic member 51, the first elastic member 50 will first extend in the first direction. In this way, the first elastic member 50 can push the latch 20 to move toward the first hole 12 in the first direction. When the first elastic member 50 is limited or the deformation force of the first elastic member 50 is less than the deformation force of the second elastic member 51, the second elastic member 51 begins to extend, thereby pushing the connecting rod assembly 30 to gradually fold in the first direction, so that the connecting rod assembly 30 gradually extends out of the accommodating groove 21 along the radial direction of the latch 20.

[0054] During the process of retracting the latch 20 into the accommodating cavity 11, the push rod 40 pulls the connecting rod assembly 30 to gradually straighten in the first direction. Since the elastic coefficient of the first elastic member 50 is greater than the elastic coefficient of the second elastic member 51, the second elastic member 51 will be compressed first. After the connecting rod assembly 30 is received in the accommodating groove 21, the push rod 40 pulls the latch 20 through the connecting rod assembly 30 to gradually retract into the accommodating cavity 11. At the same time, the latch 20 gradually compresses the first elastic member 50.

[0055] Among them, by providing the second elastic member 51, the second elastic member 51 can make the force on the connecting rod assembly 30 in the first direction more uniform, thereby reducing the probability of the connecting rod assembly 30 getting stuck and improving the reliability of the automatic locking device 100 during operation.

[0056] The first elastic member 50 and the second elastic member 51 are both sleeved on the push rod 40. When the first drive motor 41 drives the push rod 40 to move, the push rod 40 can limit the first elastic member 50 and the second elastic member 51, so that the angle between the force of the first elastic member 50 and the second elastic member 51 and the first direction is smaller, thereby further improving the stability of the automatic locking device 100 during operation. Preferably, the first elastic member 50 and the second elastic member 51 are both springs, which have low cost and are easy to arrange.

[0057] In some embodiments of the present invention, Figure 4-Figure 6 As shown, one end of the latch 20 having the through hole 22 is formed with a limiting boss 24 extending outward along the axial direction of the latch 20 . In the extended position, the limiting boss 24 is located in the accommodating cavity 11 and abuts against the circumference of the first hole 12 .

[0058] During the extension of the latch 20, when the latch 20 reaches the extended position, the limiting boss 24 prevents the latch 20 from continuing to move, and the first drive motor 41 drives the connecting rod assembly 30 to fold in the first direction through the push rod 40. At the same time, the second elastic member 51 gradually extends, so that the connecting rod assembly 30 gradually extends out of the accommodating groove 21 along the radial direction of the latch 20.

[0059] By setting the limiting boss 24, the latch 20 can be limited and prevented from escaping from the mounting tube 10. During the product design process, the overlapping position of the limiting boss 24 and the periphery of the first hole 12 can be adjusted according to the size of the workpiece 200 to be locked, thereby meeting more product design needs.

[0060] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, a slider 42 is provided at one end of the push rod 40 connected to the connecting rod assembly 30, and a mounting groove is provided on the slider 42, and the mounting groove corresponds to the connecting rod assembly 30 one by one, and the connecting rod assembly 30 is rotatably connected to the inner wall of the mounting groove. Thus, the rotatable connection between the connecting rod assembly 30 and the push rod 40 can be achieved. Preferably, a fixing block 23 is provided in the accommodating groove 21, and a fixing groove corresponding to the connecting rod assembly 30 is provided on the fixing block 23, and the end of the connecting rod assembly 30 away from the slider 42 is rotatably connected to the inner wall of the fixing groove, thereby, the rotatable connection between the connecting rod assembly 30 and the latch 20 can be achieved.

[0061] In some embodiments of the present invention, Figure 4 and Figure 5As shown, the driving assembly includes a driving nut 43, a thread is formed on the push rod 40, the driving nut 43 is sleeved on the push rod 40 and matched with the thread, and the first driving motor 41 is connected to the driving nut 43. In this way, the push rod 40 can be reciprocated in the first direction by the forward and reverse rotation of the first driving motor 41, and the driving nut 43 and the thread on the push rod 40 have a high transmission efficiency, wherein the output shaft of the first driving motor 41 is connected to the driving nut 43 through a driving belt.

[0062] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the automatic locking device 100 also includes: a fixed frame 60, a movable frame 70 and a second driving motor 71, the mounting cylinder 10 is arranged on the movable frame 70, the movable frame 70 is movably arranged on the fixed frame 60 along a first direction, and the second driving motor 71 is connected to the movable frame 70 to drive the movable frame 70 to move relative to the fixed frame 60 in the first direction.

[0063] When the latch pin 20 passes through the workpiece 200 to be locked and is in the extended position, and the connecting rod assembly 30 is in the limited state, it can be understood that there may be a gap between the workpiece 200 to be locked and the automatic locking device 100. By setting a fixed frame 60, a movable frame 70 and a second drive motor 71, when the connecting rod assembly 30 is in the limited state, the second drive motor 71 can drive the movable frame 70 to move the connecting rod assembly 30 toward the workpiece 200 to be locked until the connecting rod assembly 30 abuts against the workpiece 200 to be locked, thereby improving the locking effect of the automatic locking device 100.

[0064] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the fixed frame 60 is provided with a rack 61 extending in the first direction, and the automatic locking device 100 also includes: a driving worm 72 and a driving turbine 73, the driving worm 72 is connected between the second driving motor 71 and the driving turbine 73, and the driving turbine 73 is meshed with the rack 61. During the operation of the automatic locking device 100, the second driving motor 71 drives the driving turbine 73 to rotate through the driving worm 72, and the driving turbine 73 moves on the rack 61, so that the movable frame 70 can move in the first direction relative to the fixed frame 60. Among them, the worm transmission has a high reliability, which can further improve the reliability of the automatic locking device 100 during operation, and the matching transmission structure of the driving turbine 73 and the rack 61 is relatively simple, which can further reduce the difficulty of product design and production.

[0065] The driving turbine 73 is mounted on the turbine bracket 731 , and the driving worm 72 is mounted on the worm bracket 721 .

[0066] In some embodiments of the present invention, the drive turbine 73 is a helical gear, and the teeth on the rack 61 are helical teeth. The helical gear transmission is relatively stable and has low noise, thereby further improving the stability of the automatic locking device 100 during operation and reducing the noise generated during operation of the automatic locking device 100.

[0067] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the fixed frame 60 is also provided with a slide rail 80, on which a sliding protrusion extending along a first direction is formed, and a slide groove extending along the first direction is formed on the movable frame 70, in which the sliding protrusion is matched. When the movable frame 70 moves in the first direction relative to the fixed frame 60, the slide groove and the sliding protrusion cooperate to limit and guide the movable frame 70, so that the movable frame 70 moves more smoothly and steadily. Preferably, the movable frame 70 is provided with a sliding block 74, and the slide groove is formed on the sliding block 74.

[0068] In some embodiments of the present invention, the automatic locking device 100 further includes: a first pressure sensor, a second pressure sensor, a third pressure sensor and a controller. The first pressure sensor is disposed on the fixing frame 60, and the first pressure sensor is suitable for detecting the pressure between the workpiece 200 to be locked and the fixing frame 60. The second pressure sensor and the third pressure sensor are disposed in the accommodating cavity 11 and are arranged at intervals in the first direction. In the initial position, the second pressure sensor contacts the latch 20, and in the extended position, the latch 20 contacts the third pressure sensor. The controller is electrically connected to the first pressure sensor, the second pressure sensor and the third pressure sensor.

[0069] After the latch 20 passes through the matching hole on the workpiece 200 to be locked and the connecting rod assembly 30 is in a limited state, the movable frame 70 drives the connecting rod assembly 30 to move toward the workpiece 200 to be locked. At the same time, the fixed frame 60 moves toward the workpiece 200 to be locked. When the workpiece 200 to be locked contacts the first pressure sensor and the pressure of the workpiece 200 to be locked on the first pressure sensor reaches a set value, the controller locks the workpiece 200 to be locked in place and stops the operation of the second drive motor 71. Thereby, the locking effect of the automatic locking device 100 on the workpiece 200 to be locked can be further improved.

[0070] During the movement of the latch 20, after the latch 20 contacts the second pressure sensor and the third sensor, the controller determines that the latch 20 has moved into position, thereby achieving precise control of the moving position of the latch 20, reducing the number of unnecessary impacts between the components of the automatic locking device 100, and increasing the service life of the automatic locking device 100.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An automatic locking device, characterized in that: include: A mounting tube, wherein a receiving cavity is formed in the mounting tube, and a first hole communicating with the receiving cavity is formed at one end of the mounting tube in a first direction; a latch, the latch being movably disposed in the accommodating cavity between an initial position and an extended position along the first direction, and a accommodating groove being formed on the latch; A connecting rod assembly, the connecting rod assembly is arranged in the accommodating groove, and the connecting rod assembly has an initial state and a limited state; a driving assembly connected to the latch and the connecting rod assembly, for driving the latch to move between the initial position and the extended position, and for driving the connecting rod assembly to switch between the initial state and the limit state, The automatic locking device can be switched between a locked state and an unlocked state. In the unlocked state, the latch is located at the initial position, in which the latch is received in the receiving cavity, and the connecting rod assembly is in the initial state, in which the connecting rod assembly is received in the receiving groove; In the locked state, the latch is located at the extended position, in which one end of the latch extends out of the accommodating cavity through the first hole, and the connecting rod assembly is in a limited state and is located outside the accommodating cavity. In the limited state, a portion of the connecting rod assembly extends out of the accommodating groove along the radial direction of the latch for locking the workpiece to be locked.

2. The automatic locking device according to claim 1, characterized in that: The connecting rod assembly includes: a first rod and a second rod, the first rod is rotatably connected to the second rod, one end of the first rod away from the second rod is rotatably connected to the driving assembly, and one end of the second rod away from the first rod is rotatably connected to the pin.

3. The automatic locking device according to claim 1, characterized in that: There are a plurality of connecting rod assemblies, and the plurality of connecting rod assemblies are arranged at intervals in the circumferential direction of the latch, and the plurality of connecting rod assemblies are arranged symmetrically with respect to the axis of the latch.

4. The automatic locking device according to claim 1, characterized in that: The driving assembly includes a push rod and a first driving motor, wherein the first driving motor is connected to one end of the push rod to drive the push rod to move along the first direction, a through hole connected to the accommodating groove is formed on the latch, and the other end of the push rod passes through the through hole and is connected to the connecting rod assembly.

5. The automatic locking device according to claim 4, characterized in that: The driving assembly further includes: a first elastic member connected between an end of the latch having the through hole and an inner wall of the accommodating cavity away from the first hole. In the initial position, the first elastic member is in a compressed state.

6. The automatic locking device according to claim 5, characterized in that: The driving assembly also includes: a second elastic member, which is arranged in the accommodating groove, and the second elastic member is connected between one end of the connecting rod assembly connected to the push rod and the peripheral edge of the through hole, the elastic coefficient of the first elastic member is greater than the elastic coefficient of the second elastic member, the first elastic member and the second elastic member are both sleeved on the push rod, and in the initial position, the second elastic member is in a compressed state.

7. The automatic locking device according to claim 5, characterized in that: One end of the latch pin having the through hole is formed with a limiting boss extending outward along the axial direction of the latch pin. In the extended position, the limiting boss is located in the accommodating cavity and abuts against the circumference of the first hole.

8. The automatic locking device according to claim 4, characterized in that: A slider is provided at one end of the push rod connected to the connecting rod assembly. A mounting groove is provided on the slider. The mounting groove corresponds to the connecting rod assembly one by one. The connecting rod assembly is rotatably connected to the inner wall of the mounting groove.

9. The automatic locking device according to any one of claims 1 to 8, characterized in that: Also includes: A fixed frame, a movable frame and a second driving motor, the mounting tube is arranged on the movable frame, the movable frame is movably arranged on the fixed frame along the first direction, and the second driving motor is connected to the movable frame to drive the movable frame to move relative to the fixed frame in the first direction.

10. The automatic locking device according to claim 9, characterized in that: The fixing frame is provided with a rack extending along the first direction. The automatic locking device further comprises: a driving worm and a driving turbine. The driving worm is connected between the second driving motor and the driving turbine. The driving turbine is meshed with the rack.

11. The automatic locking device according to claim 9, characterized in that: The fixed frame is further provided with a slide rail, on which a slide protrusion extending along the first direction is formed, and on the movable frame is formed a slide groove extending along the first direction, in which the slide protrusion is fitted.

12. The automatic locking device according to claim 9, characterized in that: The automatic locking device also includes: a first pressure sensor, a second pressure sensor and a third pressure sensor, wherein the first pressure sensor is disposed on the fixing frame, and is suitable for detecting the pressure between the workpiece to be locked and the fixing frame, the second pressure sensor and the third pressure sensor are disposed in the accommodating cavity, and are arranged at intervals in the first direction, wherein the second pressure sensor contacts the latch at the initial position, and the latch contacts the third pressure sensor at the extended position; A controller is electrically connected to the first pressure sensor, the second pressure sensor and the third pressure sensor.

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