Automatic twist lock device for loading and unloading shelter

Abstract

The automatic twist lock device is characterized in that a boss is arranged on the bearing surface of a base, center through holes which are communicated are formed in the center of the boss and the center of the base, a limiting groove is further formed in the center of the upper end face of the boss, a mounting hole is formed in the base, and a spiral lifting mechanism is arranged in the mounting hole; the locking block is arranged above the boss, the locking rod penetrates through the central through hole, the upper end of the locking rod is fixedly connected with the locking block, and the lower end of the locking rod is connected with the spiral lifting mechanism in the mounting hole; the spiral lifting mechanism comprises a spiral assembly, and the spiral assembly comprises a driven block and a driving block. The square cabin corner fitting and carrying equipment can be automatically locked or unlocked conveniently and quickly, the working efficiency of the loading and unloading process of a square cabin is improved, manpower and time cost is saved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary tooling, and particularly relates to an automatic twist lock device for the loading and unloading of a shelter. Background Art

[0002] In order to facilitate transportation and installation, existing shelters are generally provided with corner fittings that meet the requirements of GJB / 2410 "Military Shelter Corner Fitting Specification" at the eight vertex positions of the shelter body. The corner fittings are structural components that connect corner columns, skeletons, and panels, and can serve as connection interfaces between the carrier wheel sets, lifting devices, leveling mechanisms, and hoisting, fastening, and towing components and the shelter.

[0003] During production, testing, and use, it is often necessary to transfer and load / unload the shelter. For occasions where gantry cranes and other lifting equipment are not installed or cannot be used, loading and unloading equipment is usually used to carry out the loading and unloading activities. A twist lock is installed on its bearing plate to fix the shelter on the loading and unloading equipment to ensure the safety of the loading and unloading process.

[0004] The locking and unlocking operations of existing shelter twist locks still mostly adopt manual or semi-automatic methods, which not only waste manpower and time but also pose safety hazards and reduce the loading and unloading efficiency of the shelter. Therefore, it is necessary to design and develop an automatic twist lock device for the loading and unloading of shelters. Summary of the Invention

[0005] The purpose of the invention is to provide an automatic twist lock device for the loading and unloading of shelters, which can automatically lock or unlock the shelter corner fittings with the carrying equipment conveniently and quickly, improve the working efficiency of the shelter loading and unloading process, save manpower and time costs, and reduce safety hazards.

[0006] To achieve the above purpose, the technical solution of the invention is as follows: An automatic twist lock device for the loading and unloading of shelters, comprising a base, a lock rod, and a lock block; A boss is provided on the bearing surface of the base. A central through hole communicating with each other is provided at the center of the boss and the base. A limiting groove is further provided at the center of the upper end surface of the boss. An installation hole is provided in the base, and a screw lifting mechanism is provided in the installation hole; The lock block is arranged above the boss. The lock rod passes through the central through hole. The upper end of the lock rod is fixedly connected to the lock block, and the lower end is connected to the screw lifting mechanism in the installation hole; The screw lifting mechanism includes a screw assembly. The screw assembly includes a passive block and an active block. The upper end surface of the passive block is fixedly connected to the locking rod. The lower end surface of the passive block is provided with a first upper screw inclined surface, and a first card slot is arranged on the first upper screw inclined surface. The active block is connected to the driving mechanism. The upper end surface of the active block is provided with a first lower screw inclined surface having the same screw lift angle as the first upper screw inclined surface. The spiral directions of the first upper screw inclined surface and the first lower screw inclined surface are opposite. A first clamping block adapted to the size of the first card slot is arranged on the second screw inclined surface.

[0007] Preferably, the lower end surface of the passive block is further provided with a second upper screw inclined surface, and a second card slot is arranged on the second upper screw inclined surface. The upper end surface of the active block is further provided with a second lower screw inclined surface, and a second clamping block adapted to the size of the second card slot is arranged on the second lower screw inclined surface. The arc lengths and screw lift angles of the first upper screw inclined surface, the first lower screw inclined surface, the second upper screw inclined surface, and the first lower screw inclined surface are the same. The extending directions of the spiral lines of the first upper screw surface and the second upper screw surface are opposite, forming a mirror symmetry relationship. The extending directions of the spiral lines of the first lower screw surface and the second lower screw surface are opposite, forming a mirror symmetry relationship.

[0008] Preferably, the screw lifting mechanism further includes a spring, and the spring is arranged between the base and the screw assembly.

[0009] Preferably, the extending direction of the limiting groove is perpendicular to the main plane of the convex platform, and the distance between the bottom surface of the limiting groove and the upper surface of the base is equal to the depth of the lock hole of the square cabin corner fitting.

[0010] Preferably, the width of the limiting groove is greater than or equal to the thickness of the locking block. The thicknesses of the convex platform and the locking block are both smaller than the width of the lock hole of the square cabin corner fitting, and the length of the locking block is greater than the width of the lock hole of the square cabin corner fitting.

[0011] Preferably, a spring installation groove is further arranged at the top of the installation hole, and one end of the spring is clamped in the spring installation groove.

[0012] Preferably, the screw lifting mechanism further includes a limiting dial. The limiting dial is arranged between the spring and the passive block. The limiting dial is fixedly connected to the passive block. Two groups of limit switches are arranged in the installation hole. The limit switches are electrically connected to the driving mechanism. A contact convex portion is arranged on the limiting dial, and the limit switch is triggered when the contact convex portion rotates to contact the limit switch.

[0013] Preferably, the lead of the kinematic pair of the screw lifting mechanism is equal to or greater than the depth of the limiting groove.

[0014] Preferably, the spring is in a compressed state.

[0015] Preferably, a bearing is also provided on the base, and the bearing is connected to the carrying equipment.

[0016] Compared with the prior art, the present invention can drive the locking block to rotate through the spiral assembly, thereby completing the locking and unlocking of the cabin corner piece; by setting a driving mechanism, the device can automatically complete the locking / unlocking of the cabin corner piece and the carrying equipment without relying on manpower. The present invention can automatically lock or unlock the cabin corner piece and the carrying equipment conveniently and quickly, improve the work efficiency of the cabin loading and unloading process, save manpower and time costs, and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 is a schematic diagram of the structure of the base; Figure 3 It is a schematic diagram of the structure of the locking block, locking rod, spring and limit paddle; Figure 4 is a schematic diagram of the structure of the passive block in the spiral assembly; Figure 5 is a schematic diagram of the structure of the active block in the spiral assembly; Figure 6 This is a schematic diagram of the existing shelter corner fitting structure; Figure 7 It is the motion diagram of the spiral component; In the figure: 10, base, 11, boss, 12, limit groove, 13, center through hole, 14, spring mounting groove, 15, mounting hole, 20, locking rod, 21, locking block, 30, spring, 31, limit paddle, 32, passive block, 321, first upper spiral inclined surface, 322, first clamping groove, 323, clamping groove end face, 324, upper spiral end face, 325, second clamping groove, 326, upper spiral inclined surface, 33, active block, 331, first lower spiral inclined surface, 332, first clamping block, 333, lower spiral end face, 334, second lower spiral inclined surface, 335, second clamping block, 34, contact convex portion, 40, bearing. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The terms such as "upper", "lower", "left", "right" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship shall also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0019] like Figure 1 , Figure 2As shown in the figure, an automatic twist lock device for cabin loading and unloading in this embodiment includes a base 10, a lock rod 20, and a lock block 21. A boss 11 is provided on the upper surface of the base 10. The boss 11 and the base 10 can be fixedly connected or integrally formed. A central through hole 13 that communicates with each other is provided at the center of the boss 11 and the base 10. A limiting groove 12 is also provided at the center of the upper end surface of the boss 11. The extending direction of the limiting groove 12 is perpendicular to the main plane A of the boss 11. An installation hole 15 is provided in the base 10. A spring installation groove 14 is provided at the top of the installation hole 15. A spiral lifting mechanism is provided in the installation hole 15. The lock block 21 is provided on the boss 11. The lock rod 20 passes through the central through hole 13. Its upper end is fixedly connected to the lock block 21, and its lower end is fixedly connected to a passive block 32 in the installation hole 15. The width of the limiting groove 12 is greater than or equal to the thickness of the lock block 21. The purpose is that after the lock block 21 rotates 90°, the bottom of the lock block can smoothly enter the limiting groove 12.

[0020] As Figure 3 , Figure 4 , Figure 5 shown in the figure, the spiral lifting mechanism is composed of a spring 30, a limiting dial 31, and a spiral component. The spiral component is composed of a passive block 32 and an active block 33. One end of the spring 30 is engaged with the spring installation groove 14, and the other end abuts against the limiting dial 31. The spring 30 is always in a compressed state and has a downward pressure on the limiting dial 31. The limiting dial 31 is fixedly connected to the passive block 32, and the area of the limiting dial 31 is greater than the cross-sectional area of the spring installation groove 14 to ensure that the limiting dial 31 moves in the installation hole 15.

[0021] The lower end face of the passive block 32 is provided with a first upper spiral inclined surface 321. An upper spiral end face 324 is formed at the spiral end point of the extending direction of the first upper spiral inclined surface 321. A first card slot 322 is provided on the first upper spiral inclined surface 321. The starting point and the ending point of the first card slot 322 also respectively form a card slot end face 323. The upper end face of the active block 33 is provided with a first lower spiral inclined surface 331 having the same spiral lift angle as that of the first upper spiral inclined surface 321. A lower spiral end face 333 is formed at the spiral starting point of the first lower spiral inclined surface 331. A first card block 332 adapted to the size of the first card slot 322 is provided on the first lower spiral inclined surface 331. The active block 33 is connected to a driving mechanism. The driving mechanism can drive the active block 33 to perform a rotational movement. The first card block 332 of the active block 33 moves in the first card slot 322 of the passive block 32. When the first card block 332 of the active block 33 is in contact with the end face 323 of the first card slot 322 of the passive block 32, the driving mechanism can continue to rotate to drive the active block 33, the passive block 32, the limit dial 31, the lock rod 20 and the lock block 21 to rotate synchronously. Two limit switches are provided in the mounting hole 15. The height difference between the first group of limit switches and the second group of limit switches is the same as the lead of the moving pair of the spiral lifting mechanism. The limit switches are electrically connected to the driving mechanism. A contact convex portion 34 is provided on the limit dial 31. The contact convex portion 34 of the limit dial 31 can contact the limit switches during rotation. When the limit dial 31 rotates synchronously with the driving mechanism, the contact convex portion 34 can trigger the limit switches to send a stop signal to the driving mechanism.

[0022] Further, in order to enable the spiral assembly to maintain balance, a more preferred solution is to respectively provide two spiral inclined surfaces on the active block 33 and the passive block 32. As Figure 4 , Figure 5 shown. Specifically, the lower end face of the passive block 32 is further provided with a second upper spiral inclined surface 326. The upper end face of the active block 33 is further provided with a second lower spiral inclined surface 334. The arc lengths of the spiral inclined surfaces of the first upper spiral surface 321 and the second upper spiral surface, as well as the starting positions and the ending positions, are symmetrically distributed with respect to the central plane of the circumference, and the extending directions of the spiral lines are opposite, forming a mirror-symmetrical relationship. The arc lengths of the spiral inclined surfaces of the first lower spiral surface 331 and the second lower spiral surface 335, as well as the starting positions and the ending positions, are symmetrically distributed with respect to the central plane of the circumference, and the extending directions of the spiral lines are opposite, forming a mirror-symmetrical relationship. A second card slot 325 is provided on the second upper spiral inclined surface 326. A second card block 335 adapted to the size of the second card slot 325 is provided on the second lower spiral inclined surface 334. The spiral lift angles of the first upper spiral inclined surface 321, the first lower spiral inclined surface 331, the second upper spiral inclined surface 326, and the second lower spiral inclined surface 334 are the same.

[0023] A bearing 40 is also provided at the bottom of the base 10, and the bearing 40 is connected to the carrying equipment. Under the transport condition, even if the carrying device undergoes an angle change such as turning, the automatic twist-lock device provided in this embodiment will not change its position due to the turning of the carrying device, and will stably maintain the locked state, thereby avoiding the situation of unlocking due to the twisting of the base 10.

[0024] This embodiment is mainly used for locking the corner fittings of the cabin. Figure 6 The schematic diagram of the structure of the existing standard corner fitting of the shelter, the B surface of the corner fitting of the shelter is provided with a lock hole. The thickness of the boss 11 and the lock block 21 is less than the width w of the lock hole of the corner fitting of the shelter, and the maximum length of the boss 11 and the lock block 21 is less than the length L of the lock hole of the corner fitting of the shelter, so that the lock block 21 and the boss 11 can smoothly extend into the lock hole of the corner fitting. The length of the lock block 12 is greater than the width w of the lock hole of the corner fitting of the shelter. When the lock block 12 rotates 90° and the bottom enters the limit groove 12, it can be engaged with the lock hole of the corner fitting of the shelter, so that the lock block 21 cannot pass through the lock hole. The lead of the kinematic pair of the spiral lifting mechanism is equal to or greater than the depth of the limit groove 12. The distance between the bottom surface of the upper limit groove 12 of the boss 11 and the upper surface of the base 10 is equal to the depth of the lock hole of the corner fitting of the shelter, so that the lock block 21 can be tightly attached to the inner surface of the corner fitting of the shelter after falling into the limit groove 12 of the boss 11, ensuring the stability of the subsequent shelter transfer and loading and unloading process.

[0025] The working principle of the present invention is: In the initial state, the locking block 21 of this embodiment is in the same direction as the boss 11 and can pass through the locking hole of the corner piece of the shelter, and the bearing surface B of the corner piece of the shelter fits with the upper surface of the base. Figure 7 c position, start the driving mechanism, the driving mechanism drives the spiral end surface 333 of the active block 33 to Figure 7 c position and gradually rotate clockwise, thereby driving the passive block 32, the limiting paddle 31, the locking rod 20, and the locking block 21 to rotate clockwise together, until the locking block 21 reaches a position perpendicular to the boss 11 (i.e., rotates 90 degrees clockwise), and the driving mechanism drives the active block 33 to start rotating counterclockwise. During this process, the first block 332 and the second block 335 of the active block 33 move in the first slot 322 and the second slot 325 of the passive block 32 respectively, and the passive block 32 drives the locking rod 20 and the locking block 21 to move downward, and the bottom of the locking block 21 enters the limiting slot 12 of the boss 11, until the lower spiral end face 333 of the active block 33 of the spiral lifting mechanism is in contact with the upper spiral end face 324 of the passive block 32 (i.e., rotates to Figure 7 a position), at this time, the contact protrusion 34 of the limit paddle 31 just touches the first set of limit switches in the mounting hole 15, the limit switch sends a stop signal, and the drive mechanism stops running. At this point, the automatic twist lock device realizes the locking function of the corner piece of the other cabin.

[0026] When unlocking is required, the driving mechanism starts running clockwise from Figure 7 position a, driving the driving block 33 of the screw assembly to rotate starting from position a. The first locking block 332 and the second locking block 335 of the driving block 33 move in the first card slot 322 and the second card slot 325 of the driven block 32 respectively. During the rotation of the driving block 33, the driven block 32 drives the lock rod 20, the lock block 21, the limit dial 31, and the driven block 32 to move vertically upward together. When running to Figure 7 position c, since the lead of the kinematic pair of the screw lifting mechanism is equal to or greater than the depth of the limit slot 12 of the boss 11, at this time, the bottom surface of the lock block 21 is flush with or higher than the upper end surface of the boss 11. The driving mechanism continues to drive the driving block 33 to rotate, and then drives the lock block 21 to rotate clockwise until the lock block 21 runs parallel to the boss 11 (i.e., rotates 90 degrees clockwise). At this time, the contact convex part 34 of the limit dial 31 just touches the second group of limit switches in the mounting hole 15, and the driving mechanism stops running and maintains braking. Thus, the automatic twist lock device realizes the unlocking function of the cabin corner fitting.

[0027] The driving mechanism and the limit switch in this embodiment are common technical solutions in the technical field and are not specifically limited here. The driving mechanism can be set as a part of the automatic twist lock device or as a part of the carrier device. When in use, the driving mechanism in the carrier device is connected to the driving block 33 of the screw assembly. The driving mechanism and the driving block 33 of the screw assembly can be connected by common transmission connection methods in this field such as keys, couplings, gears, chains, etc. The limit switch is installed in the mounting hole 15. When the lock block 21 runs to the locking or unlocking position, the contact convex part 34 of the limit dial 31 triggers the limit switch, and the limit switch sends a stop signal to the driving mechanism, and the driving mechanism stops running and maintains braking. It is also possible not to set the limit dial and the limit switch. The driving mechanism can stop moving after actively rotating a fixed angle during locking and unlocking through software and circuit design, so as to realize the locking or unlocking and maintaining between the device in this embodiment and the cabin corner fitting.

[0028] The above is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features, and principles described in the scope of the present invention patent application are included in the protection scope of the present invention patent application.

Claims

1. An automatic twist lock device for loading and unloading a shelter, comprising a base, a locking rod and a locking block; A boss is provided on the bearing surface of the base, a central through hole is provided in the center of the boss and the base, a limiting groove is provided in the center of the upper end surface of the boss, a mounting hole is provided in the base, and a spiral lifting mechanism is provided in the mounting hole; The locking block is arranged above the boss, the locking rod passes through the central through hole, the upper end of the locking rod is fixedly connected to the locking block, and the lower end of the locking rod is connected to the spiral lifting mechanism in the mounting hole; The spiral lifting mechanism includes a spiral assembly, and the spiral assembly includes a passive block and an active block. The upper end face of the passive block is fixedly connected to the locking rod, and the lower end face of the passive block is provided with a first upper spiral inclined surface, and the first upper spiral inclined surface is provided with a first clamping groove; the active block is connected to the driving mechanism, and the upper end face of the active block is provided with a first lower spiral inclined surface with the same spiral rise angle as the first upper spiral inclined surface, the first upper spiral inclined surface and the first lower spiral inclined surface have opposite spiral directions, and the second spiral inclined surface is provided with a first clamping block matched with the size of the first clamping groove.

2. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The lower end surface of the passive block is also provided with a second upper spiral slope, and the second upper spiral slope is provided with a second slot; the upper end surface of the active block is also provided with a second lower spiral slope, and the second lower spiral slope is provided with a second block matched with the size of the second slot, the first upper spiral slope, the first lower spiral slope, the second upper spiral slope, and the first lower spiral slope have the same spiral slope arc length and spiral lead angle, the first upper spiral surface and the second upper spiral surface have opposite spiral line extension directions, forming a mirror-symmetrical relationship, and the first lower spiral surface and the second lower spiral surface have opposite spiral line extension directions, forming a mirror-symmetrical relationship.

3. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The spiral lifting mechanism also includes a spring, which is arranged between the base and the spiral assembly.

4. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The extending direction of the limiting groove is perpendicular to the main plane of the boss, and the distance between the bottom surface of the limiting groove and the upper surface of the base is equal to the depth of the lock hole of the cabin corner piece.

5. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The width of the limiting groove is greater than or equal to the thickness of the locking block, the thickness of the boss and the locking block are both less than the width of the locking hole of the cabin corner piece, and the length of the locking block is greater than the width of the locking hole of the cabin corner piece.

6. The automatic twist lock device for loading and unloading a shelter according to claim 3, characterized in that: A spring installation groove is also provided on the top of the installation hole, and one end of the spring is engaged in the spring installation groove.

7. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The spiral lifting mechanism also includes a limit paddle, which is arranged between the spring and the passive block, and the limit paddle is fixedly connected to the passive block. Two groups of limit switches are arranged in the mounting hole, and the limit switch is electrically connected to the driving mechanism. The limit paddle is provided with a contact protrusion, and the contact protrusion triggers the limit switch when it rotates to contact the limit switch.

8. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The lead of the kinematic pair of the spiral lifting mechanism is equal to or greater than the depth of the limiting groove.

9. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: The spring is in a compressed state.

10. The automatic twist lock device for loading and unloading a shelter according to claim 1, characterized in that: A bearing is also provided on the base, and the bearing is connected to the carrying equipment.

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