Spacing-adjustable mechanical two-way limiting device

Abstract

The utility model discloses a mechanical two-way limiting device with an adjustable distance, 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 utility model belongs to the field of air freight, specifically relates to a mechanical two-way limiting device with adjustable spacing. BACKGROUND

[0002] With the development of the air freight industry, air freight systems that meet different loading needs are in high demand. As a result, the reliable limiting of various types of containerized air freight units has become an urgent problem that needs to be addressed in air freight systems. The mechanical two-way limiting device is used to provide reliable limiting in the forward / reverse direction and the vertical direction for air freight containerized units. It is fixedly installed on the aircraft floor or a mounting bracket, and the various loads received by the containerizer when the two-way limiting lock is limited are transmitted to the load-bearing part of the aircraft body.

[0003] The existing mechanical two-way lock for air freight has significant limitations in actual application. For example, Chinese patent application No. 202111366697.0, this type of two-way limiting device uses a fixed spacing design, and its rigid structure cannot adapt to the loading needs of different size containerizers (ULDs), resulting in the need to pre-configure multiple specifications of limiting devices, which not only increases equipment procurement and storage costs, but also causes cargo compartment space redundancy and system complexity to rise. At the same time, the installation position of this type of device is bound to the cargo compartment floor anchor point, making it difficult to adjust flexibly to adapt to the bottom lock distribution of non-standard containers or special cargo layout schemes, greatly limiting the diversity of loading schemes. In terms of compatibility, existing locks are usually developed for specific containerizer models (such as LD3, LD6), and when faced with increasingly diverse air freight scenarios, different devices often need to be frequently replaced or stacked, significantly slowing down loading and unloading efficiency. In addition, the current system relies on a large number of independent locks to achieve multi-directional constraint, which not only occupies valuable cargo compartment volume, but also increases maintenance difficulty due to the lack of coordination between devices.

[0004] Therefore, it is necessary to upgrade the structure of traditional mechanical two-way locks for air freight to meet different loading needs and improve loading compatibility. INVENTION CONTENTS

[0005] In order to overcome the problem that the existing mechanical two-way lock for air freight cannot meet different loading needs, a mechanical two-way limiting device with adjustable spacing is provided for air freight systems. This device can achieve forward / reverse direction and vertical limiting and its installation position is adjustable, allowing the limiting spacing to be adjusted according to different loading needs.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] This utility model provides a mechanical bidirectional limiting device with adjustable spacing, including a bidirectional locking base assembly, which includes a bidirectional locking base bracket, a bidirectional locking base rack, and a cam mechanism mounting bracket.

[0008] A two-way locking base rack is provided on one side of the bottom of the two-way locking base bracket. The side wall of the two-way locking 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.

[0009] A cam mechanism mounting bracket is provided on the other side of the bottom of the bidirectional lock base bracket, which is parallel to and opposite to the rack of the bidirectional lock base. A cam mechanism is provided on the cam mechanism mounting bracket, and the cam mechanism abuts against or separates from the slide rail of the aircraft floor.

[0010] Furthermore, at least two elongated through holes are opened on the side of the cam mechanism mounting bracket. A cam mechanism is arranged between the upper and lower surfaces of the elongated through holes. The cam mechanism has a pin through hole, which is clearance-fitted with the pin. The pin is fixed between the upper and lower surfaces of the elongated through holes.

[0011] Furthermore, the cam mechanism also includes a cam mechanism trigger, which is located in the tangential direction of the cam mechanism cam and extends outward toward the bidirectional lock base assembly.

[0012] Furthermore, the bidirectional lock base bracket is also provided with a locking mechanism, which is fixed to the bidirectional lock base bracket via a locking base.

[0013] Furthermore, the locking mechanism includes a locking shaft, the bottom of which is connected to the locking slider via a thread, the upper part of which is fixedly connected to the locking knob, and the locking base is clearance-fitted with the locking shaft.

[0014] Furthermore, the locking slider is secured to the slide rail of the aircraft floor.

[0015] Furthermore, the locking mechanism is provided in two sets, symmetrically arranged at the front and rear ends of the bidirectional lock base bracket.

[0016] Furthermore, it also includes a lock head with an inverted "L" shaped structure. The bottom of the lock head is hinged to the bidirectional lock base bracket via a lock head shaft. A torsion spring is sleeved on the lock head shaft, and the torsion spring is used to always fasten the top of the lock head to the bidirectional lock base bracket.

[0017] Furthermore, the lock has two locks, namely a first lock and a second lock, which engage in opposite directions under the action of a torsion spring.

[0018] Furthermore, the center of the first lock head has a through structure, and the top of the second lock head passes through the through structure of the center of the first lock head and forms a cross-locking structure with the first lock head.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention provides a mechanical bidirectional movement limiting device with adjustable spacing. By adding a rack and pinion slide rail to the bottom of the mechanical bidirectional movement limiting device, the number of traditional fixed movement limiting devices is reduced, enhancing the integration of cargo system components and improving the loading compatibility of the cargo system. This effectively increases the types of containers that can be loaded, further improving the compatibility, reliability, and safety of the cargo system, and solving the problem that existing mechanical bidirectional locks for air cargo cannot meet different loading requirements. The device has a compact structure and reasonable layout, maximizing the types of container units that can be loaded into the cargo system, thereby improving the integration, reliability, and safety of the cargo system.

[0021] Furthermore, this invention utilizes a cam mechanism for unlocking and locking the mechanical bidirectional movement limiting device, achieving directional / counter-directional movement limiting. Furthermore, this invention utilizes a locking mechanism to achieve vertical and spanwise movement limiting of the mechanical bidirectional movement limiting device. The mechanical bidirectional movement limiting device disclosed in this invention is fixedly installed on an aircraft floor rail. The locking mechanism, cam mechanism, and rack and pinion mechanism achieve the limiting and fixing of the mechanical bidirectional movement limiting device on the aircraft floor rail. The installation position is adjustable, enabling directional / counter-directional and vertical movement limiting. The adjustable installation position allows for adjustment of the movement limiting distance according to different loading requirements, achieving quick disassembly and installation, and enabling various container unit limiting functions. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the cam mechanism structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the base assembly structure according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the locking mechanism structure according to an embodiment of the present utility model;

[0026] In the diagram, 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, 8. First lock head, 9. Second lock head, 10. Second lock head torsion spring, 11. Second lock head pin. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings:

[0030] This utility model provides a mechanical bidirectional limiting device with adjustable spacing, such as... Figure 1 As shown, it includes a two-way lock base assembly 3, a cam mechanism, and a locking mechanism 4;

[0031] See Figure 3 The bidirectional lock base assembly 3 includes a bidirectional lock base bracket 32, and a bidirectional lock base rack 31 is provided on one side of the bottom of the bidirectional lock base bracket 32. The side wall of the bidirectional lock base rack 31 meshes with the side wall of the floor track rack 1, such as... Figure 1 As shown, the floor track rack 1 is fixed to the slide rail on the aircraft floor.

[0032] In some embodiments of this utility model, a cam mechanism mounting bracket 33 is provided on the other side of the bottom of the bidirectional lock base bracket 32, which is parallel to and opposite to the bidirectional lock base rack 31. At least two elongated through holes are opened on the side of the cam mechanism mounting bracket 33, and a cam mechanism is provided between the upper and lower surfaces of the elongated through holes. (See reference...) Figure 2The cam mechanism has a pin through hole, and the pin through hole and the pin are clearance fit. The pin is fixed between the upper and lower surfaces of the elongated through hole.

[0033] In some embodiments of this utility model, the cam mechanism includes a cam mechanism trigger 5, which is located in the tangential direction of the cam of the cam mechanism and extends outward from the bidirectional lock base assembly 3, such as... Figure 2 As shown.

[0034] In some embodiments of this utility model, the bidirectional locking base bracket 32 ​​is provided with a locking mechanism 4, and the locking mechanism 4 is fixed to the bidirectional locking base bracket through the locking base 42.

[0035] In some embodiments of this utility model, the locking mechanism 4 includes a locking shaft 41, the bottom of which is connected to the locking slider 43 by a thread, the upper part of which is fixedly connected to the locking knob 44, the locking base 42 is clearance-fitted with the locking shaft 41, and the locking slider 43 is secured to the slide rail of the aircraft floor.

[0036] In some embodiments of this utility model, there are two locking mechanisms 4, which are symmetrically arranged at the front and rear ends of the bidirectional lock base bracket 32.

[0037] In some embodiments of this utility model, the adjustable spacing mechanical bidirectional limiting device also includes a lock head, which has an inverted "L" shaped structure. The bottom of the lock head is hinged to the bidirectional lock base bracket 32 ​​via a lock head pin. A torsion spring is sleeved on the lock head pin, and the torsion spring is used to always fasten the top of the lock head to the bidirectional lock base bracket 32.

[0038] In some embodiments of this utility model, there are two lock heads, namely a first lock head 8 and a second lock head 9, and the first lock head 8 and the second lock head 9 are engaged in opposite directions under the action of a torsion spring.

[0039] In some embodiments of this utility model, the center of the first lock head 8 is a through structure, and the top of the second lock head 9 passes through the through structure of the center of the first lock head 8 and forms a cross-interlocking structure with the first lock head 8.

[0040] The first lock head 8 and the second lock head 9 form a two-way movement limiting structure. The bottom of the first lock head 8 is hinged to the two-way lock base bracket 32 ​​via the first lock head pin 6. A first lock head torsion spring 6 is sleeved on the first lock head pin 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 keep the first lock head 8 locked on the two-way lock base bracket 32 ​​at all times.

[0041] The bottom of the second lock head 9 is hinged to the bidirectional lock base bracket 32 ​​via the second lock head pin 11. A second lock head torsion spring 10 is sleeved on the second lock head pin 11. The two ends of the second lock head torsion spring 10 are respectively connected to the bidirectional lock base bracket 32 ​​and the second lock head 9. The second lock head torsion spring 10 is used to always fasten the second lock head 9 to the bidirectional lock base bracket 32.

[0042] When locking an air cargo container, the adjustable-spacing mechanical bidirectional limiting device provided by this utility model, taking a pair of adjustable-spacing mechanical bidirectional limiting devices working together as an example, can first fasten and install a pair of bidirectional locking base assemblies 3 on the slide rail of the aircraft floor. By adjusting the meshing position of the bidirectional locking base rack 31 of the pair of bidirectional locking base assemblies 3 with the floor slide rail rack 1, the distance between the pair of bidirectional locking base assemblies 3 can be adjusted to match the size of the air cargo container to be limited, thereby achieving bidirectional limiting of air cargo container units of different sizes.

[0043] The following is a detailed description with reference to specific examples.

[0044] Example

[0045] This embodiment is a mechanical two-way limiting device with adjustable spacing (referred to as a two-way lock), and its structural schematic diagram is shown below. Figure 1 As shown, 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 by screws. The bidirectional lock base assembly 3 engages with the floor track rack 1 through the bidirectional lock base rack 31 at the bottom, thereby realizing the bidirectional lock limiting movement in the reverse direction along the aircraft's heading.

[0046] The locking mechanism 4 is fixedly installed on the front and rear sides of the bidirectional lock base assembly 3 by threaded connection. When locking is required, the locking knob 44 is rotated to lock the locking slider 43. The locking slider 43 cooperates with the aircraft floor slide rail to complete the bidirectional lock vertical limit along the aircraft.

[0047] The cam mechanism trigger 5 is hinged to the bidirectional lock base assembly 3 via a pin. When locking is required, the cam mechanism trigger 5 is engaged, achieving bidirectional locking along the aircraft spanwise. This device has a compact structure, is easy to install, and has a wide range of adjustable installation options, enabling installation on various aircraft containers and improving the versatility and economy of air cargo systems.

[0048] Base component 3, such as Figure 3 As shown, the bidirectional lock base rack 31 and the cam mechanism mounting bracket are fixedly mounted on the bidirectional lock base bracket 32 ​​by bolts.

[0049] Locking mechanism 4 Figure 4As shown, the bottom of the locking shaft 41 is connected to the locking slider 43 via a thread, and the upper part of the locking shaft 41 is fixedly connected to the locking knob 44 via a key. The locking base 42 and the locking shaft 41 are fitted together with a clearance fit and fixedly mounted on the two-way locking base bracket 32. Locking is achieved simply by rotating the locking knob. This structure is simple, easy to operate, and allows for quick locking and positioning.

[0050] During work:

[0051] When locking, the installation position of the two-way limit lock must be adjusted first. Engage the cam mechanism trigger 5 to mesh the rack 31 at the bottom of the mounting base with the rack 1 of the aircraft floor slide rail, achieving directional and spanwise limit locking. Then tighten the locking knob 44 in the middle of the two-way lock base assembly 3 to achieve vertical limit locking. After securing the two-way lock, finally pull up the first lock head 8, causing the first lock head 8 and the second lock head 9 to mutually limit each other within their own structures, reaching the working position and engaging with the bottoms of the two opposing aircraft containers.

[0052] To unlock, unscrew the locking knob 44 of the locking mechanism and pull up the trigger 5 of the cam mechanism to unlock the lock in both directions. At the same time, press the lock head 8, and the first lock head 8 and the second lock head 9 will retract under the action of the spring preload.

[0053] When loading an aircraft container, the bidirectional lock provided by this utility model requires directional / reverse directional and vertical limiting. To achieve this, the locking mechanism and cam mechanism of the bidirectional lock are released, the lock is adjusted to the desired position, and then the locking mechanism and cam mechanism are tightened. Vertical locking is achieved using the locking block at the bottom of the locking mechanism, and directional / reverse directional locking is achieved using the rack and pinion mechanism. Finally, the lock head of the bidirectional lock is pulled up and engaged with the bottom of the container, thus achieving directional / reverse directional and vertical limiting of the container.

[0054] The two-way lock has an adjustable installation position, enabling quick disassembly and installation, and providing various container unit limiting functions. It is fixedly installed on the aircraft floor rail, and the mechanical lock is fixed on the aircraft floor rail through a locking mechanism, cam mechanism, and rack and pinion mechanism. This device can limit movement in yaw / reverse yaw and vertical directions, and the installation position is adjustable to adjust the limiting distance according to different loading requirements.

[0055] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A mechanically adjustable bi-directional stop device with adjustable spacing, characterized in that, The bidirectional lock base assembly (3) comprises a bidirectional lock base support (32), a bidirectional lock base rack (31), and a cam mechanism mounting bracket (33); The bidirectional lock base rack (31) is arranged on one side of the bottom of the bidirectional lock base support (32), and the side wall of the bidirectional lock base rack (31) is engaged with the side wall of the floor track rack (1) fixed on the slide rail of the aircraft floor. The cam mechanism mounting bracket (33) is arranged on the other side of the bottom of the bidirectional lock base support (32) opposite to the bidirectional lock base rack (31), and a cam mechanism is arranged on the cam mechanism mounting bracket (33), and the cam mechanism abuts against or separates from the slide rail of the aircraft floor.

2. The mechanically adjustable bi-directional stop device of claim 1, wherein, At least two long strip through holes are formed 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 strip through hole, and the cam mechanism has a pin shaft through hole which is clearance fitted with a pin shaft.

3. The mechanically adjustable bi-directional stop device of claim 2, wherein, The cam mechanism further comprises a cam mechanism trigger (5) which is located in the tangent direction of the cam mechanism cam and extends outwardly of the bidirectional lock base assembly (3).

4. The mechanically adjustable bi-directional stop device of claim 1, wherein, The bidirectional lock base assembly (3) further comprises a locking mechanism (4) arranged on the bidirectional lock base support (32) through a locking base (42).

5. The mechanically adjustable bi-directional stop device of claim 4, wherein, The locking mechanism (4) comprises a locking shaft (41) which is connected to a locking slider (43) at the bottom through a thread, and the upper part of the locking shaft (41) is fixedly connected to a locking knob (44), and the locking base (42) is clearance fitted with the locking shaft (41).

6. The mechanically adjustable bi-directional stop device of claim 5, wherein, The locking slider (43) is clamped to the slide rail of the aircraft floor.

7. A mechanically adjustable bi-directional stop device of claim 4, claim 5 or claim 6, wherein, The locking mechanism (4) is provided with two locking mechanisms which are symmetrically arranged at the front and rear ends of the bidirectional lock base support (32).

8. The mechanically adjustable bi-directional stop device of claim 1, wherein, The locking mechanism (4) further comprises a lock head which has an inverted "L" type structure, and the lock head is hingedly connected to the bidirectional lock base support (32) through a lock head pin shaft at the bottom, and a torsional spring is sleeved on the lock head pin shaft, and the torsional spring is used to always buckle the top of the lock head on the bidirectional lock base support (32).

9. The mechanically adjustable bi-directional stop device of claim 8, wherein, The lock head has two lock heads, i.e., a first lock head (8) and a second lock head (9), and the buckling directions of the first lock head (8) and the second lock head (9) are opposite under the action of the torsional spring.

10. The mechanically adjustable bi-directional stop device of claim 9, wherein, The first lock head (8) has a through structure at the center, and 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).

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