Spacing-adjustable mechanical bidirectional limiting device and limiting method thereof

Abstract

The invention discloses a distance-adjustable mechanical bidirectional limiting device and a limiting method thereof, and belongs to the technical field of air freight. According to the device, through a rack meshing structure of the two-way lock base assembly and the aircraft floor sliding rail, dynamic adjustment of the course and reverse course limiting distance is achieved, and the device is suitable for containers of different sizes. The device is provided with a cam mechanism, and a trigger drives a cam to rotate to complete unlocking and locking of a bidirectional lock; and the locking mechanism realizes vertical and spanwise limiting and fixing through the matching of a threaded sliding block and a knob. According to the device, the rack and sliding rail integrated design is adopted, the number of devices is reduced, the cargo hold space utilization rate and loading compatibility are improved, rapid disassembly and assembly and multi-type container unit limiting are supported, the problem that a traditional fixed device is insufficient in flexibility is solved through structural optimization, and the reliability, safety and adaptation efficiency of a freight transport system are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the field of air cargo, and particularly relates to a mechanical two-way restraint device with adjustable spacing and a restraint method thereof. Background Art

[0002] With the development of the air cargo industry, air cargo systems that meet different loading requirements have become extremely popular. Subsequently, reliable restraint for various types of containerized air cargo units has increasingly become an urgent problem to be solved in air cargo systems. The mechanical two-way restraint device is used to provide reliable restraint for the heading / opposite heading and vertical direction of air cargo container units. It is fixedly installed on the aircraft floor or mounting bracket, and various loads received by the container during restraint are transmitted to the force-bearing part of the aircraft body through the two-way restraint lock itself.

[0003] Existing mechanical two-way locks for air cargo have significant limitations in practical applications. Taking the Chinese patent application with the application number 202111366697.0 as an example, this type of two-way restraint device adopts a fixed-spacing design, and its rigid structure cannot adapt to the loading requirements of different-sized containers (ULD), resulting in the need to pre-equip various specifications of restraint devices in advance, which not only increases the equipment procurement and warehousing costs, but also causes redundant cargo hold space and increased system complexity. At the same time, the installation position of this type of device is bound to the anchoring points on the cargo hold floor, making it difficult to flexibly adjust to adapt to the bottom lock distribution of non-standard containers or special cargo layout plans, greatly restricting the diversity of loading plans. In terms of compatibility, existing locks are usually developed only for specific container models (such as LD3, LD6). When facing the increasingly diversified air cargo scenarios, it is often necessary to frequently replace or stack different devices, significantly dragging down the loading and unloading efficiency. In addition, the current system relies on a large number of scattered independent locks to achieve multi-directional constraints, which not only occupies valuable effective cargo hold volume, but also increases the operation and maintenance difficulty due to the lack of coordinated linkage between devices.

[0004] Therefore, it is necessary to upgrade the structure of traditional mechanical two-way locks for air cargo to meet different loading requirements and improve loading compatibility. Summary of the Invention

[0005] In order to overcome the problem that the existing mechanical two-way locks for air cargo cannot meet different loading requirements, a mechanical two-way restraint device with adjustable spacing is provided for an air cargo system. This device can achieve heading / opposite heading and vertical restraint, and its installation position is adjustable, and the restraint spacing can be adjusted according to different loading requirements.

[0006] To achieve the above object, the present invention adopts the following technical solutions: The first object of the present invention is to provide a mechanical two-way limiting device with adjustable spacing, including a two-way lock base assembly, and the two-way lock base assembly includes a two-way lock base bracket, a two-way lock base rack, and a cam mechanism mounting bracket; One side of the bottom of the two-way lock base bracket is provided with a two-way lock base rack, and the side wall of the two-way lock base rack meshes with the side wall of the floor track rack, and the floor track rack is fixed on the slide rail of the aircraft floor; On the other side of the bottom of the two-way lock base bracket parallel to and opposite to the two-way lock base rack, a cam mechanism mounting bracket is provided, and a cam mechanism is arranged on the cam mechanism mounting bracket, and the cam mechanism abuts against or separates from the slide rail of the aircraft floor.

[0007] Further, at least two long through holes are opened on the side of the cam mechanism mounting bracket, a cam mechanism is arranged between the upper surface and the lower surface of the long through hole, the cam mechanism has a pin shaft through hole, and the pin shaft through hole is in clearance fit with the pin shaft, and the pin shaft is fixed between the upper surface and the lower surface of the long through hole.

[0008] Furthermore, the cam mechanism further includes a cam mechanism trigger, and the cam mechanism trigger is located in the tangential direction of the cam of the cam mechanism and extends to the outside of the two-way lock base assembly.

[0009] Further, the mechanical two-way limiting device with adjustable spacing further includes a locking mechanism, and the locking mechanism is fixed to the two-way lock base bracket through a locking base.

[0010] Furthermore, the locking mechanism includes a locking shaft, the bottom of the locking shaft is connected with a locking slider through a thread, the upper part of the locking shaft is fixedly connected with a locking knob, the locking base is in clearance fit with the locking shaft, and the locking slider is clamped and fixed on the slide rail of the aircraft floor.

[0011] Still further, there are two groups of the locking mechanisms, which are symmetrically arranged at the front and rear ends of the two-way lock base bracket.

[0012] Further, it further includes a lock head, the lock head has an inverted "L" structure, the bottom of the lock head is hinged to the two-way lock base bracket through a lock head shaft, and a torsion spring is sleeved on the lock head shaft, and the torsion spring is used to always buckle the top of the lock head on the two-way lock base bracket.

[0013] Furthermore, there are two lock heads, namely a first lock head and a second lock head, and the buckling directions of the first lock head and the second lock head are opposite under the action of the torsion spring.

[0014] Still further, the center of the first lock head is a through structure, and the top of the second lock head passes through the central through structure of the first lock head and forms a cross-interlocking structure with the first lock head.

[0015] The second object of the present invention is to disclose a limiting method for the mechanical two-way limiting device with adjustable spacing. First, a pair of two-way lock base assemblies are buckled and installed on the slide rail of the aircraft floor. By adjusting the meshing position between the two-way lock base rack of the pair of two-way lock base assemblies and the floor slide rail rack, the distance between the pair of two-way lock base assemblies is adjusted to match the size of the air cargo container to be limited, so as to realize the two-way limiting of air cargo containers of different sizes.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a mechanical two-way limiting device with adjustable spacing. By designing and adding a rack slide rail at the bottom of the mechanical two-way limiting device, the number of traditional fixed limiting devices is reduced, the integration degree of the components of the freight system is enhanced, the loading compatibility of the freight system is improved, the loading types of the container can be effectively increased, and further the compatibility, reliability and safety of the freight system are improved, solving the problem that the existing mechanical two-way locks for air cargo cannot meet different loading requirements. The device has a compact structure and a reasonable layout, can maximize the types of containers that can be loaded by the freight system, thereby improving the integration degree, reliability and safety of the freight system.

[0017] Furthermore, the present invention also uses a cam mechanism to unlock and lock the mechanical two-way limiting device, realizing the heading / reverse heading limiting of the mechanical two-way limiting device.

[0018] Furthermore, the present invention uses a locking mechanism to realize the vertical and lateral limiting of the mechanical two-way limiting device.

[0019] The mechanical two-way limiting device disclosed by the present invention is fixedly installed on the aircraft floor slide rail. The limiting and fixing of the mechanical two-way limiting device on the aircraft floor slide rail are realized through a locking mechanism, a cam mechanism and a rack mechanism. The installation position is adjustable, and the heading / reverse heading and vertical limiting can be realized and the installation position is adjustable. The limiting spacing is adjusted according to different loading requirements, realizing quick disassembly and quick installation, and can realize the limiting functions of various containers. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a schematic structural diagram of the cam mechanism of an embodiment of the present invention; Figure 3 is a schematic structural diagram of the base assembly of an embodiment of the present invention; Figure 4 is a schematic structural diagram of the locking mechanism of an embodiment of the present invention; In the figure, 1. Floor track rack, 2. Floor slide rail, 3. Two-way lock base assembly, 31. Two-way lock base rack, 32. Two-way lock base bracket, 33. Cam mechanism mounting bracket, 4. Locking mechanism, 41. Locking shaft, 42. Locking base, 43. Locking slider, 44. Locking knob, 5. Cam mechanism trigger, 6. First lock head torsion spring, 7. First lock head pin shaft, 8. First lock head, 9. Second lock head, 10. Second lock head torsion spring, 11. Second lock head pin shaft. Detailed implementation

[0021] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0022] It should be noted that in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings: The present invention provides a mechanically adjustable two-way limit device, as Figure 1 shown, which includes a two-way lock base assembly 3, a cam mechanism, and a locking mechanism 4; Referring to Figure 3 , the two-way lock base assembly 3 includes a two-way lock base bracket 32, and a two-way lock base rack 31 is provided on one side of the bottom of the two-way lock base bracket 32. The side wall of the two-way lock base rack 31 meshes with the side wall of the floor track rack 1, as Figure 1 shown, and the floor track rack 1 is fixed on the slide rail of the aircraft floor.

[0024] In some embodiments of the present invention, on the other side of the bottom of the two-way lock base bracket 32, which is parallel and opposite to the two-way lock base rack 31, a cam mechanism mounting bracket 33 is provided. At least two long through holes are opened on the side of the cam mechanism mounting bracket 33, and a cam mechanism is arranged between the upper surface and the lower surface of the long through holes. Refer to Figure 2 , the cam mechanism has a pin shaft through hole, and the pin shaft through hole and the pin shaft are in clearance fit. The pin shaft is fixed between the upper surface and the lower surface of the long through hole.

[0025] In some embodiments of the present invention, the cam mechanism includes a cam mechanism trigger 5. The cam mechanism trigger 5 is located in the tangential direction of the cam of the cam mechanism and extends outward from the two-way lock base assembly 3, as Figure 2 shown.

[0026] In some embodiments of the present invention, a locking mechanism 4 is provided on the two-way lock base bracket 32. The locking mechanism 4 is fixed to the two-way lock base bracket through a locking base 42.

[0027] In some embodiments of the present invention, the locking mechanism 4 includes a locking shaft 41. The bottom of the locking shaft 41 is connected to a locking slider 43 through a thread. The upper part of the locking shaft 41 is fixedly connected to a locking knob 44. The locking base 42 and the locking shaft 41 are in clearance fit, and the locking slider 43 is clamped to the slide rail of the aircraft floor.

[0028] In some embodiments of the present invention, there are two sets of the locking mechanism 4, which are respectively arranged at the front and rear ends of the two-way lock base bracket 32.

[0029] In some embodiments of the present invention, the mechanically two-way limit device with adjustable spacing further includes a lock head. The lock head has an inverted "L" shaped structure. The bottom of the lock head is hinged to the two-way lock base bracket 32 through a lock head pin shaft. A torsion spring is sleeved on the lock head pin shaft, and the torsion spring is used to always buckle the top of the lock head on the two-way lock base bracket 32.

[0030] In some embodiments of the present invention, there are two lock heads, namely a first lock head 8 and a second lock head 9. The buckling directions of the first lock head 8 and the second lock head 9 are opposite under the action of the torsion spring.

[0031] The first lock head 8 and the second lock head 9 form a two-way limit structure. The bottom of the first lock head 8 is hinged to the two-way lock base bracket 32 through a first lock head pin shaft 6. A first lock head torsion spring 6 is sleeved on the first lock head pin shaft 7. The two ends of the first lock head torsion spring 6 are respectively connected to the two-way lock base bracket 32 and the first lock head 8. The first lock head torsion spring 6 is used to always buckle the first lock head 8 on the two-way lock base bracket 32.

[0032] The bottom of the second lock head 9 is hinged to the two-way lock base bracket 32 through the second lock head pin shaft 11. A second lock head torsion spring 10 is sleeved on the second lock head pin shaft 11. Two ends of the second lock head torsion spring 10 are respectively connected to the two-way lock base bracket 32 and the second lock head 9. The second lock head torsion spring 10 is used to always latch the second lock head 9 onto the two-way lock base bracket 32.

[0033] In some embodiments of the present invention, the center of the first lock head 8 has a through structure. The top of the second lock head 9 passes through the through structure at the center of the first lock head 8 and forms an intersecting interlocking structure with the first lock head 8.

[0034] When the mechanically adjustable-spacing two-way limiting device provided by the present invention locks an air cargo container, taking a pair of mechanically adjustable-spacing two-way limiting devices cooperating with each other as an example, a pair of two-way lock base assemblies 3 can be first latched and installed on the slide rail of the aircraft floor. By adjusting the meshing position of the two-way lock base rack 31 of the pair of two-way lock base assemblies 3 and the floor slide rail rack 1, the distance between the pair of two-way lock base assemblies 3 can be adjusted to match the size of the air cargo container unit to be limited, so as to realize the two-way limiting of air cargo container units of different sizes.

[0035] The following is specifically described in conjunction with embodiments.

[0036] Embodiment This embodiment is a mechanically adjustable-spacing two-way limiting device (abbreviated as two-way lock). Its structural schematic diagram is as Figure 1 shown, and it includes a floor track rack 1 and a floor slide rail 2. The floor track rack 1 is fixedly installed on the floor slide rail 2 through screws. The two-way lock base assembly 3 meshes with the floor track rack 1 through the two-way lock base rack 31 at the bottom, so as to realize the two-way limiting of the two-way lock along the aircraft's heading and reverse heading.

[0037] The locking mechanism 4 is fixedly installed on the front and rear sides of the two-way lock base assembly 3 through threaded connection. When locking is required, rotate the locking knob 44 to lock the locking slider 43. The locking slider 43 cooperates with the aircraft floor slide rail to complete the vertical limiting of the two-way lock along the aircraft.

[0038] The cam mechanism trigger 5 is hinged to the two-way lock base assembly 3 through a pin shaft. When locking is required, buckle the cam mechanism trigger 5 to realize the lateral limiting of the two-way lock along the aircraft. This device has a compact structure, is convenient to install, has a wide adjustable installation range, can realize the installation of various aviation containers, and improves the diversity and economy of the air cargo transportation system.

[0039] The base assembly 3 is as Figure 3 shown. The two-way lock base rack 31 and the cam mechanism mounting bracket are fixedly installed on the two-way lock base bracket 32 through bolts.

[0040] The locking mechanism 4 is as Figure 4As shown in the figure, the bottom of the locking shaft 41 is connected to the locking slider 43 by threads, and the upper part of the locking shaft 41 is fixedly connected to the locking knob 44 by a key. The locking base 42 is in clearance fit with the locking shaft 41 and is fixedly installed on the two-way lock base bracket 32. When locking, only need to rotate the locking knob to achieve the locking function. This structure is simple and easy to operate, and can achieve quick locking and positioning.

[0041] During operation: When locking, first adjust the installation position of the two-way limit lock. Fasten the trigger 5 of the cam mechanism, so that the rack 31 at the bottom of the installation base meshes with the rack 1 of the aircraft floor slide rail to achieve the two-way lock heading / reverse heading and lateral limit. Then tighten the locking knob 44 at the middle position of the two-way lock base assembly 3 to achieve the vertical limit of the two-way lock. Complete the fixation of the two-way lock. Finally, pull up the first lock head 8, so that the first lock head 8 and the second lock head 9 achieve mutual limit under their own structures to reach the working position, and respectively buckle with the bottoms of two opposite aviation containers.

[0042] When unlocking, unscrew the locking knob 44 of the locking mechanism and pull up the trigger 5 of the cam mechanism, then the two-way lock can be unlocked. At the same time, press the lock head 8, and the first lock head 8 and the second lock head 9 retract under the action of the spring pre-tightening force.

[0043] When loading an aviation container, when the two-way lock provided by the present invention needs heading / reverse heading and vertical limits, loosen the locking mechanism and the cam mechanism of the two-way lock, adjust the two-way lock to the required limiting position, tighten the locking mechanism and press down the cam mechanism, and use the locking block at the lower part of the locking mechanism to achieve vertical locking and use the rack mechanism to achieve mechanical lock heading / reverse heading locking. Finally, pull up the lock head of the two-way lock and buckle it at the bottom of the container, that is, the heading / reverse heading and vertical limits of the container are achieved.

[0044] The installation position of the two-way lock is adjustable, which can achieve quick disassembly, quick installation, and can achieve the limiting functions of various container units. It is fixedly installed on the aircraft floor slide rail, and the mechanical lock is limited and fixed on the aircraft floor slide rail through the locking mechanism, the cam mechanism, and the rack mechanism. This device can achieve heading / reverse heading and vertical limiting and the installation position is adjustable, and the limiting distance can be adjusted according to different loading requirements.

[0045] The above content is only to illustrate the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A mechanical two-way limit device with adjustable spacing, characterized in that: It comprises a two-way lock base assembly (3), wherein the two-way lock base assembly (3) comprises a two-way lock base bracket (32), a two-way lock base rack (31) and a cam mechanism mounting frame (32); A two-way lock base rack (31) is provided on one side of the bottom of the two-way lock base bracket (32), and the side wall of the two-way lock base rack (31) is meshed with the side wall of the floor track rack (1), and the floor track rack (1) is fixed on the slide rail of the aircraft floor; A cam mechanism mounting frame (33) is arranged on the other side of the bottom of the two-way lock base bracket (32) which is parallel to and opposite to the two-way lock base rack (31). A cam mechanism is arranged on the cam mechanism mounting frame (33). The cam mechanism abuts against or is separated from the slide rail of the aircraft floor.

2. The mechanical two-way limit device with adjustable spacing according to claim 1, characterized in that: At least two long through holes are provided on the side of the cam mechanism mounting frame (33); a cam mechanism is arranged between the upper surface and the lower surface of the long through hole; the cam mechanism has a pin through hole; the pin through hole and the pin are clearance-matched; the pin is fixed between the upper surface and the lower surface of the long through hole.

3. The mechanical two-way limit device with adjustable spacing according to claim 2, characterized in that: The cam mechanism further comprises a cam mechanism trigger (5), wherein the cam mechanism trigger (5) is located in the tangential direction of the cam of the cam mechanism and extends toward the outside of the two-way lock base assembly (3).

4. The mechanical two-way limit device with adjustable spacing according to claim 1, characterized in that: It also includes a locking mechanism (4), which is arranged on the two-way lock base bracket (32) via a locking base (42).

5. The mechanical two-way limit device with adjustable spacing according to claim 4, characterized in that: The locking mechanism (4) comprises a locking shaft (41), the bottom of the locking shaft (41) is connected to a locking slider (43) via a thread, the upper part of the locking shaft (41) is fixedly connected to a locking knob (44), the locking base (42) and the locking shaft (41) are clearance-matched, and the locking slider (43) is fixed to a slide rail of an aircraft floor.

6. The mechanical two-way limit device with adjustable spacing according to claim 4, characterized in that: The locking mechanism (4) has two groups, which are symmetrically arranged at the front and rear ends of the two-way lock base bracket (32).

7. The mechanical two-way limit device with adjustable spacing according to claim 1, characterized in that: It also includes a lock head, which has an inverted "L"-shaped structure. The bottom of the lock head is hinged on the two-way lock base bracket (32) through a lock head pin shaft. The lock head pin shaft is sleeved with a torsion spring. The torsion spring is used to always buckle the top of the lock head on the two-way lock base bracket (32).

8. The mechanical bidirectional limit device with adjustable spacing according to claim 7, characterized in that: The lock head has two parts, namely a first lock head (8) and a second lock head (9); the first lock head (8) and the second lock head (9) have opposite buckling directions under the action of the torsion spring.

9. The mechanical bidirectional limit device with adjustable spacing according to claim 8, characterized in that: The center of the first lock head (8) is a through structure, and the top of the second lock head (9) passes through the central through structure of the first lock head (8) and forms a cross-interlocking structure with the first lock head (8).

10. A limiting method of the mechanical bidirectional limiting device with adjustable spacing according to any one of claims 1 to 9, characterized in that: First, a pair of two-way lock base assemblies (3) are buckled and installed on the slide rail of the aircraft floor, and the distance between the pair of two-way lock base assemblies (3) is adjusted by adjusting the meshing position of the two-way lock base racks (31) of the pair of two-way lock base assemblies (3) and the floor slide rail racks (1) to match the size of the air cargo container unit to be limited, thereby realizing two-way limitation of air cargo container units of different sizes.

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