Bidirectional limit lock

Abstract

The utility model relates to a kind of two-way limit lock, including box, limiting component and first drive mechanism;Box is equipped with containing area;Limiting component is rotatably located in containing area, limiting component includes oppositely arranged first limiting arm and second limiting arm, first limiting arm has first limit surface, second limiting arm has second limit surface, first limit surface and second limit surface are reversely arranged;First drive mechanism is located in box, the output end of first drive mechanism is connected to first limiting arm and second limiting arm, and first drive mechanism is used to drive first limiting arm and second limiting arm to rotate and switch between first initial position and first limit position.The utility model is responsible for the limit of one direction by two limiting arms respectively, and the stress concentration of traditional single limiting arm is decomposed into two limiting arms to bear together, which can reduce the stress load of single limiting arm, avoid the risk of fracture, and realize two-way reliable limit.

Description

Technical Field

[0001] This utility model relates to the field of air transport technology, specifically to a two-way limit lock. Background Technology

[0002] With the widespread application of drone technology in logistics and transportation, during gravity-drop operations, transport aircraft utilize a certain angle of attack during flight to allow cargo to slide off a "loading platform." To ensure the safety and smooth operation of this process, aircraft designers have installed bidirectional locking mechanisms, similar to train tracks, on the "loading platform." These bidirectional locking mechanisms are key components ensuring the stable and safe transport of pallets within the aircraft's cargo hold. These designs aim to prevent pallets from shifting or tilting during flight, thereby protecting both the cargo and the aircraft.

[0003] Existing two-way limit locks typically rely on a single limit arm to limit the movement of two adjacent pallets. However, a single limit arm experiences concentrated stress when bearing pallet loads. Especially during drone takeoff and landing, high-speed flight, or when encountering airflow impacts, the limit arm must withstand significant bidirectional torques, which can easily lead to fatigue fracture at stress concentration points, severely affecting the reliability and service life of the lock. Utility Model Content

[0004] Based on the above description, this utility model provides a bidirectional limit lock, which aims to solve the problem that the single limit arm of the existing bidirectional limit lock is subject to concentrated force, which easily leads to fatigue fracture at the stress concentration point.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A two-way limit lock, comprising: The box has a storage area; A limiting component is rotatably disposed within the receiving area. The limiting component includes a first limiting arm and a second limiting arm disposed opposite to each other. The first limiting arm has a first limiting surface, and the second limiting arm has a second limiting surface. The first limiting surface and the second limiting surface are disposed in opposite directions. Both the first limiting arm and the second limiting arm have a first initial position and a first limiting position. A first driving mechanism is disposed inside the box. The output end of the first driving mechanism is connected to the first limiting arm and the second limiting arm. The first driving mechanism is used to drive the first limiting arm and the second limiting arm to rotate and switch between the first initial position and the first limiting position.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the first driving mechanism includes a first driving motor and a first rotating shaft. Both the first driving motor and the first rotating shaft are disposed inside the housing. The first rotating shaft is parallel to the width direction of the accommodating area. One end of the first rotating shaft is connected to the output end of the first driving motor. The first limiting arm and the second limiting arm are sequentially sleeved on the first rotating shaft along the axial direction of the first rotating shaft.

[0008] Furthermore, the first drive mechanism includes a first transmission component, the input end of which is connected to the output end of the first drive motor, and the output end of which is connected to one end of the first rotating shaft.

[0009] Furthermore, a locking device is included, which is disposed within the housing. A stop groove is provided on the first limiting arm. The locking device includes a second driving mechanism and a locking block. The locking block is disposed at the output end of the second driving mechanism and corresponds to the first limiting arm. The locking block has a second initial position and a second limiting position. The second driving mechanism is used to drive the locking block to rotate and switch between the second initial position and the second limiting position.

[0010] Furthermore, the second drive mechanism includes a second drive motor and a second rotating shaft, the second rotating shaft being parallel to the first rotating shaft, one end of the second rotating shaft being connected to the output end of the second drive motor, and the locking block being sleeved on the second rotating shaft.

[0011] Furthermore, the second drive mechanism includes a second transmission component, the input end of which is connected to the output end of the second drive motor, and the output end of which is connected to one end of the second rotating shaft.

[0012] Furthermore, the second transmission component includes a first cam, a second cam, and a connecting rod. The first cam is sleeved on the output end of the second drive motor, the second cam is sleeved on one end of the second rotating shaft, and the two ends of the connecting rod are connected to the first cam and the second cam respectively.

[0013] Furthermore, the second drive mechanism includes an unlocking arm, the housing has a through hole corresponding to the second rotating shaft, the unlocking arm corresponds to the through hole, and one end of the second rotating shaft passes through the through hole and is connected to the unlocking arm.

[0014] Furthermore, it includes a first position detection component, which includes a first swing arm and a first photoelectric sensor. The first swing arm is located at the other end of the first rotating shaft, and the detection end of the first photoelectric sensor faces the first swing arm.

[0015] Furthermore, it includes a second position detection component, which includes a second swing arm and a second photoelectric sensor. The second swing arm is disposed on the second cam, and the detection end of the second photoelectric sensor faces the second swing arm.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: (1) This utility model decomposes the concentrated force of the traditional single limiting arm into two limiting arms to be borne by the two limiting arms, thereby reducing the stress load of a single limiting arm, avoiding the risk of breakage, and achieving reliable bidirectional limiting.

[0017] (2) The present invention enhances the locking reliability by using a locking device to prevent the first and second limiting arms from moving under vibration or impact; and the locking device works in conjunction with the first and second limiting arms to create a multi-security mechanism for limiting the pallet. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a bidirectional limiting lock provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the box body in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal structure of the box in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the first limiting arm in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the first driving mechanism in an embodiment of this utility model; Figure 6 This is a schematic diagram of the locking device in an embodiment of the present invention; Figure 7 This is a circuit connection diagram of a bidirectional limit lock provided in an embodiment of the present utility model.

[0020] Explanation of reference numerals in the attached figures: 10. Box body; 11. Receiving area; 111. Recessed area; 1111. Side plate; 1112. First through hole; 20. Limiting assembly; 21. First limiting arm; 211. First limiting surface; 212. Stop groove; 22. Second limiting arm; 221. Second limiting surface; 30. First drive mechanism; 31. First drive motor; 32. First rotating shaft; 33. First transmission assembly; 40. Locking device; 41. Second drive mechanism; 411. Second drive motor; 412. Second rotating shaft; 413. Second transmission assembly; 4131. First cam; 4132. Second cam; 4133. Connecting rod; 414. Unlocking arm; 42. Locking block; 50. First position detection component; 51. First swing arm; 52. First photoelectric sensor; 60. Second position detection component; 61. Second swing arm; 62. Second photoelectric sensor; 70. Control panel. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0023] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0024] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0025] Reference Figure 1 and Figure 3 As shown, this utility model provides a technical solution: a two-way limiting lock, including a housing 10, a limiting component 20, and a first driving mechanism 30; the housing 10 has a receiving area 11; the limiting component 20 is rotatably disposed within the receiving area 11, the limiting component 20 includes a first limiting arm 21 and a second limiting arm 22 disposed opposite to each other, the first limiting arm 21 has a first limiting surface 211, the second limiting arm 22 has a second limiting surface 221, the first limiting surface 211 and the second limiting surface 221 are arranged in opposite directions, the first limiting arm 21 and the second limiting arm 22 each have a first initial position and a first limiting position; the first driving mechanism 30 is disposed within the housing 10, the output end of the first driving mechanism 30 is connected to the first limiting arm 21 and the second limiting arm 22, the first driving mechanism 30 is used to drive the first limiting arm 21 and the second limiting arm 22 to rotate and switch between the first initial position and the first limiting position.

[0026] It should be noted that the first initial position refers to the position when the first limiting arm 21 and the second limiting arm 22 rotate into the receiving area 11, and the second initial position refers to the position when the first limiting arm 21 and the second limiting arm 22 rotate out of the receiving area 11.

[0027] In this embodiment, the drive mechanism drives the first limiting arm 21 and the second limiting arm 22 to rotate synchronously, causing the first limiting surface 211 and the second limiting surface 221 to contact or disengage from the pallet, thereby achieving limiting or releasing. By having each of the two limiting arms responsible for limiting in one direction, the concentrated force of the traditional single limiting arm is distributed to be borne jointly by the two limiting arms, which can reduce the stress load on a single limiting arm, avoid the risk of breakage, and achieve reliable bidirectional limiting.

[0028] Reference Figure 3 As shown, in some embodiments, the first drive mechanism 30 includes a first drive motor 31 and a first rotating shaft 32. The first drive motor 31 and the first rotating shaft 32 are both disposed inside the housing 10. The first rotating shaft 32 is parallel to the width direction of the accommodating area 11. One end of the first rotating shaft 32 is connected to the output end of the first drive motor 31. The first limiting arm 21 and the second limiting arm 22 are sequentially sleeved on the first rotating shaft 32 along the axial direction of the first rotating shaft 32.

[0029] In this embodiment, the first drive motor 31 drives the first rotating shaft 32 to rotate, causing the first limiting arm 21 and the second limiting arm 22 to rotate synchronously. The transmission between the first drive motor 31 and the first rotating shaft 32 is direct and the structure is simple, making it easy to control the rotation angle and position of the first limiting arm 21 and the second limiting arm 22.

[0030] Reference Figure 3 and Figure 5 As shown, in some embodiments, the first drive mechanism 30 includes a first transmission component 33, the input end of the first transmission component 33 is connected to the output end of the first drive motor 31, and the output end of the first transmission component 33 is connected to one end of the first rotating shaft 32.

[0031] For example, the first transmission component 33 may be a gear set or a synchronous transmission component, etc.

[0032] In this embodiment, by optimizing the transmission ratio of the first transmission component 33, the output characteristics of the motor can be matched, thereby improving energy efficiency.

[0033] Reference Figures 3 to 4 and Figure 6 As shown, in some embodiments, the bidirectional limit lock includes a locking device 40, which is disposed inside the housing 10. A stop groove 212 is provided on the first limit arm 21. The locking device 40 includes a second drive mechanism 41 and a locking block 42. The locking block 42 is disposed at the output end of the second drive mechanism 41 and corresponds to the first limit arm 21. The locking block 42 has a second initial position and a second limit position. The second drive mechanism 41 is used to drive the locking block 42 to rotate and switch between the second initial position and the second limit position.

[0034] It should be noted that the second initial position refers to the position when the locking block 42 exits the stop groove 212, and the second limit position refers to the position when the locking block 42 is inserted into the stop groove 212.

[0035] In this embodiment, when the second drive mechanism 41 drives the locking block 42 to the second limit position, the locking block 42 inserts into the stop groove 212, thereby mechanically locking the first limit arm 21. The locking block 42 enhances the locking reliability and prevents the first limit arm 21 and the second limit arm 22 from moving under vibration or impact; furthermore, the locking block 42 works in conjunction with the first limit arm 21 and the second limit arm 22 to create a multiple safety mechanism for limiting the pallet.

[0036] Reference Figure 3 and Figure 6 As shown, in some embodiments, the second drive mechanism 41 includes a second drive motor 411 and a second rotating shaft 412. The second rotating shaft 412 is parallel to the first rotating shaft 32. One end of the second rotating shaft 412 is connected to the output end of the second drive motor 411, and the locking block 42 is sleeved on the second rotating shaft 412.

[0037] In this embodiment, the second drive motor 411 drives the second rotating shaft 412 to rotate, which allows the locking block 42 to rotate and switch between the second initial position and the second limit position. Independent driving by the second drive motor 411 avoids interference with the movement of the first limit arm 21, thereby improving the response speed of the locking block 42.

[0038] Reference Figure 3 and Figure 6 As shown, in some embodiments, the second drive mechanism 41 includes a second transmission component 413, the input end of which is connected to the output end of the second drive motor 411, and the output end of which is connected to one end of the second rotating shaft 412.

[0039] For example, the second transmission component 413 may be a gear set or a synchronous transmission component, etc.

[0040] In this embodiment, the transmission ratio of the second transmission component 413 is optimized to match the motor output characteristics, thereby improving energy efficiency.

[0041] Reference Figure 3 and Figure 6 As shown, in some embodiments, the second transmission assembly 413 includes a first cam 4131, a second cam 4132, and a connecting rod 4133. The first cam 4131 is sleeved on the output end of the second drive motor 411, the second cam 4132 is sleeved on one end of the second rotating shaft 412, and the two ends of the connecting rod 4133 are connected to the first cam 4131 and the second cam 4132 respectively.

[0042] In this embodiment, the second drive motor 411 drives the first cam 4131, which in turn pushes the second cam 4132 via the connecting rod 4133, thereby rotating the second rotating shaft 412. This achieves smooth motion conversion, high force transmission efficiency, and is suitable for high-frequency operation.

[0043] Reference Figure 1 , Figure 3 and Figure 6 As shown, in some embodiments, the second drive mechanism 41 includes an unlocking arm 414, the housing 10 has a through hole corresponding to the second rotating shaft 412, the unlocking arm 414 corresponds to the through hole, and one end of the second rotating shaft 412 passes through the through hole and is connected to the unlocking arm 414.

[0044] In this embodiment, by setting the unlocking arm 414, an emergency manual function can be added, which can still reliably unlock the device in the event of a power failure or control failure.

[0045] Reference Figure 5As shown, in some embodiments, the bidirectional limit lock includes a first position detection component 50, which includes a first swing arm 51 and a first photoelectric sensor 52. The first swing arm 51 is located at the other end of the first rotating shaft 32, and the detection end of the first photoelectric sensor 52 faces the first swing arm 51.

[0046] In this embodiment, when the first rotating shaft 32 rotates, the first swing arm 51 rotates with the first rotating shaft 32, and the first photoelectric sensor 52 is used to detect the position signal of the first swing arm 51. By providing real-time feedback on the position of the first swing arm 51, the control accuracy of the first swing arm 51 is improved, and structural interference or locking failure caused by overtravel or failure to reach the correct position is avoided.

[0047] For example, when the first limiting arm 21 and the second limiting arm 22 reach the first limiting position, the first swing arm 51 corresponds to the detection end of the first photoelectric sensor 52; when the first limiting arm 21 and the second limiting arm 22 reach the first initial position, the first swing arm 51 moves away from the detection end of the first photoelectric sensor 52.

[0048] Reference Figure 6 As shown, in some embodiments, the bidirectional limit lock includes a second position detection component 60, which includes a second swing arm 61 and a second photoelectric sensor 62. The second swing arm 61 is disposed on the second cam 4132, and the detection end of the second photoelectric sensor 62 faces the second swing arm 61.

[0049] In this embodiment, when the second rotating shaft 412 rotates, the second swing arm 61 rotates with the second rotating shaft 412, and the second photoelectric sensor 62 is used to detect the position signal of the second swing arm 61. By providing real-time feedback on the position of the second swing arm 61, it is indirectly determined whether the locking block 42 is in the locked state, ensuring that the locking block 42 is in place and avoiding misoperation.

[0050] For example, when the locking block 42 reaches the second limit position, the second swing arm 61 enters the detection end of the photoelectric sensor; when the locking block 42 reaches the second initial position, the second swing arm 61 moves away from the detection end of the second photoelectric sensor 62.

[0051] Reference Figure 7 As shown, in some embodiments, the bidirectional limit lock includes a control board 70, with two control terminals of the control board 70 electrically connected to the controlled terminals of the first drive motor 31 and the second drive motor 411, and two input terminals of the control board 70 electrically connected to the output terminals of the first photoelectric sensor 52 and the second photoelectric sensor 62.

[0052] In this embodiment, the control board 70 receives the position signals from each sensor and controls the operation of each drive motor to achieve automated operation.

[0053] In some embodiments, the receiving area 11 may include two concave areas 111, which are formed by the concavity of the top plate of the box body 10. Each pair of side plates 1111 of the concave area 111 is provided with a first through hole 1112 communicating with the interior of the box body 10. A first rotating shaft 32 passes through each first through hole 1112. A first limiting arm 21 and a second limiting arm 22 correspond one-to-one with the two concave areas 111. The pair of side plates 1111 of the concave area 111 with the first limiting arm 21 are provided with a second through hole communicating with the interior of the box body 10. A second rotating shaft 412 passes through each second through hole.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bidirectional limit lock, characterized in that, include: The box (10) has a receiving area (11); A limiting component (20) is rotatably disposed within the receiving area (11). The limiting component (20) includes a first limiting arm (21) and a second limiting arm (22) disposed opposite to each other. The first limiting arm (21) has a first limiting surface (211), and the second limiting arm (22) has a second limiting surface (221). The first limiting surface (211) and the second limiting surface (221) are disposed in opposite directions. Both the first limiting arm (21) and the second limiting arm (22) have a first initial position and a first limiting position. The first driving mechanism (30) is located inside the housing (10). The output end of the first driving mechanism (30) is connected to the first limiting arm (21) and the second limiting arm (22). The first driving mechanism (30) is used to drive the first limiting arm (21) and the second limiting arm (22) to rotate and switch between the first initial position and the first limiting position.

2. The bidirectional limiting lock according to claim 1, characterized in that, The first drive mechanism (30) includes a first drive motor (31) and a first rotating shaft (32). The first drive motor (31) and the first rotating shaft (32) are both located inside the housing (10). The first rotating shaft (32) is parallel to the width direction of the accommodating area (11). One end of the first rotating shaft (32) is connected to the output end of the first drive motor (31). The first limiting arm (21) and the second limiting arm (22) are sequentially sleeved on the first rotating shaft (32) along the axial direction of the first rotating shaft (32).

3. The bidirectional limiting lock according to claim 2, characterized in that, The first drive mechanism (30) includes a first transmission component (33), the input end of which is connected to the output end of the first drive motor (31), and the output end of which is connected to one end of the first rotating shaft (32).

4. The bidirectional limiting lock according to claim 3, characterized in that, The device includes a locking device (40) located inside the housing (10). A stop groove (212) is provided on the first limiting arm (21). The locking device (40) includes a second driving mechanism (41) and a locking block (42). The locking block (42) is located at the output end of the second driving mechanism (41) and corresponds to the first limiting arm (21). The locking block (42) has a second initial position and a second limiting position. The second driving mechanism (41) is used to drive the locking block (42) to rotate and switch between the second initial position and the second limiting position.

5. The bidirectional limiting lock according to claim 4, characterized in that, The second drive mechanism (41) includes a second drive motor (411) and a second rotating shaft (412). The second rotating shaft (412) is parallel to the first rotating shaft (32). One end of the second rotating shaft (412) is connected to the output end of the second drive motor (411). The locking block (42) is sleeved on the second rotating shaft (412).

6. The bidirectional limiting lock according to claim 5, characterized in that, The second drive mechanism (41) includes a second transmission component (413), the input end of which is connected to the output end of the second drive motor (411), and the output end of which is connected to one end of the second rotating shaft (412).

7. The bidirectional limiting lock according to claim 6, characterized in that, The second transmission assembly (413) includes a first cam (4131), a second cam (4132), and a connecting rod (4133). The first cam (4131) is sleeved on the output end of the second drive motor (411), the second cam (4132) is sleeved on one end of the second rotating shaft (412), and the two ends of the connecting rod (4133) are connected to the first cam (4131) and the second cam (4132) respectively.

8. The bidirectional limiting lock according to claim 7, characterized in that, The second drive mechanism (41) includes an unlocking arm (414). The housing (10) has a through hole corresponding to the second rotating shaft (412). The unlocking arm (414) corresponds to the through hole. One end of the second rotating shaft (412) passes through the through hole and is connected to the unlocking arm (414).

9. The bidirectional limiting lock according to claim 2 or 3, characterized in that, The first position detection component (50) includes a first swing arm (51) and a first photoelectric sensor (52). The first swing arm (51) is located at the other end of the first rotating shaft (32), and the detection end of the first photoelectric sensor (52) faces the first swing arm (51).

10. The bidirectional limiting lock according to claim 7 or 8, characterized in that, The second position detection component (60) includes a second swing arm (61) and a second photoelectric sensor (62). The second swing arm (61) is mounted on the second cam (4132), and the detection end of the second photoelectric sensor (62) faces the second swing arm (61).

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