An electric limit mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft

Abstract

The present invention relates to the technical field of air freight, and discloses an electric limit mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft, including a mounting base. A limit structure is arranged outside the mounting base. The limit structure includes a rocker arm body, a rotating sleeve, a large gear, a first micro switch, a second micro switch, a small gear, a screw, a DC motor, a quick replacement assembly, a spring, a first locking key, a second locking key, a clamping key and a rotating shaft. A rotating shaft is arranged at the top of the mounting base. The rocker arm body is arranged outside the rotating shaft. The rotating sleeve is arranged outside the rocker arm body. The large gear is arranged outside the rotating shaft. The electric limit mechanism for quick replacement of standard containers in the cabin of the unmanned cargo aircraft limits the Y-axis and Z-axis through a mechanical guiding mechanism, and limits the X-axis through an electric rocker arm limit mechanism, which can effectively fix the aviation standard cargo container and prevent the movement of the cargo position during flight from affecting the center of gravity of the aircraft.

Description

Technical Field

[0001] The present invention relates to the technical field of air cargo transportation, and particularly to an electric limit mechanism for quick replacement of standard containers in the cargo hold of an unmanned cargo aircraft. Background Art

[0002] Due to its high timeliness and safety, air cargo transportation occupies a relatively high market position in the cargo transportation market. Traditional manned cargo aircraft generally use mooring ropes to fix standard containers in the cargo hold, and manual operation is required to untie the mooring ropes before unloading the goods.

[0003] With the continuous development of unmanned aerial vehicle (UAV) technology, the cargo-carrying capacity of UAVs has increased from dozens of kilograms at the beginning to several thousand kilograms. To meet the requirements of certain specific usage scenarios, UAVs are required to have the ability to airdrop goods. Since there are no crew members on UAVs, it is impossible to untie the mooring ropes manually. Fixing standard air cargo containers with traditional mooring ropes has limitations in UAV cargo transportation. Therefore, we have proposed an electric limit mechanism for quick replacement of standard containers in the cargo hold of an unmanned cargo aircraft. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides an electric limit mechanism for quick replacement of standard containers in the cargo hold of an unmanned cargo aircraft, which has the advantages of being able to limit the standard container in the UAV cargo hold and well meeting the requirements of UAV cargo transportation. It solves the problem that to meet the requirements of certain specific usage scenarios, UAVs are required to have the ability to airdrop goods. Since there are no crew members on UAVs, it is impossible to untie the mooring ropes manually. Fixing standard air cargo containers with traditional mooring ropes has limitations in UAV cargo transportation.

[0006] (2) Technical Solutions

[0007] To achieve the above-mentioned purpose of being able to limit the standard container in the UAV cargo hold and well meeting the requirements of UAV cargo transportation, the present invention provides the following technical solution: An electric limit mechanism for quick replacement of standard containers in the cargo hold of an unmanned cargo aircraft, including a mounting base, and a limit structure is arranged outside the mounting base;

[0008] The limiting structure includes a rocker arm body, a rotating sleeve, a large gear, a first microswitch, a second microswitch, a small gear, a screw, a DC motor, a quick-change assembly, a spring, a first locking key, a second locking key, a clamping key and a rotating shaft. A rotating shaft is provided at the top of the mounting base. The outside of the rotating shaft is provided with a rocker arm body. The outside of the rocker arm body is provided with a rotating sleeve. The outside of the rotating shaft is provided with a large gear. The front of the mounting base is provided with a first microswitch. The front of the mounting base is provided with a second microswitch. The outside of the large gear is meshed with a small gear. The outside of the rocker arm body is movably installed with a screw. The back of the mounting base is fixedly installed with a DC motor. The top of the mounting base is provided with a quick-change assembly. A spring is provided inside the rotating shaft. The outside of the rotating shaft is provided with a first locking key. The outside of the rotating shaft is provided with a second locking key. The outside of the rotating shaft is provided with a clamping key.

[0009] Preferably, both the large gear and the small gear are located between the inner front wall and the inner right wall of the mounting base, and the small gear is close to the left side of the mounting base, and the large gear is close to the right side of the mounting base.

[0010] Preferably, a first hole is opened on the back of the mounting base. A output shaft is fixedly installed at the output end of the DC motor. The front of the output shaft penetrates through the first hole and is fixedly connected to the back of the small gear.

[0011] Preferably, the rotating sleeve is located on the right side of the rocker arm body, the screw is located on the left side of the rocker arm body, and the rocker arm body is connected to the rotating shaft through the screw.

[0012] Preferably, both the first locking key and the second locking key are connected to the rotating shaft, and the first locking key and the second locking key are symmetrically arranged on the rotating shaft.

[0013] Preferably, a second hole is opened on the front of the mounting base. Two limiting notch openings are opened inside the second hole. The sizes of the first locking key and the second locking key are adapted to the sizes of the two limiting notch openings.

[0014] Preferably, two mounting notch openings are opened on the outside of the rotating shaft. The first locking key and the second locking key are respectively located inside the two mounting notch openings, and both the first locking key and the second locking key are supported by springs.

[0015] Preferably, a limiting boss is fixedly installed at the top of the mounting base. The rocker arm body is limited by the limiting boss. Sensors are fixedly installed inside both of the two limiting notch openings.

[0016] Preferably, the process from the limiting state of the electric limiting mechanism to the limiting release state of the electric limiting mechanism is as follows:

[0017] (1). After the DC motor receives the control signal from the controller, it starts to rotate;

[0018] (2). The DC motor drives the small gear to rotate;

[0019] (3). The small gear drives the large gear to rotate;

[0020] (4). The large gear rotates a certain angle first. During the rotation process, the large gear compresses the first locking key through the inclined plane. At this time, the compression of the second locking key by the large gear is released. However, at this time, the oppression of the second locking key by the mounting seat has not been released. Therefore, the second locking key is still in a compressed state. At this time, the first locking key and the second locking key are in a compressed state, and the internal mechanical holding function of the electric limiting mechanism is released;

[0021] (5). After the mechanical holding function is released, the large gear drives the rotating shaft to rotate through the key. The rocker arm body rotates together with the rotating shaft. When it rotates to the position where the limit is released, the limit boss on the mounting seat limits the rocker arm body. At this time, the rocker arm body, the rotating shaft, the large gear, and the small gear will no longer rotate. At this time, the second locking key is ejected under the action of the spring and is embedded in the corresponding limit notch inside the second hole on the mounting seat. During the ejection process of the second locking key, it touches the sensor inside the limit notch. The sensor gives a in-place signal, the DC motor is powered off, and the internal mechanical holding function is obtained for the electric limiting mechanism. The electric limiting mechanism realizes the conversion from the locked state to the unlocked state. Moreover, the movement process of the electric limiting mechanism from the unlocked state to the locked state is opposite to that from the locked state to the unlocked state.

[0022] Beneficial effects

[0023] Compared with the prior art, the present invention provides an electric limiting mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft, having the following beneficial effects:

[0024] 1. The electric limiting mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft limits the Y-axis and Z-axis through a mechanical guiding mechanism and limits the X-axis through an electric rocker arm limiting mechanism, which can effectively fix the aviation standard cargo container and prevent the movement of the cargo position during flight from affecting the aircraft's center of gravity.

[0025] 2. The electric limiting mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft replaces the mooring rope with an electric limiting mechanism, which not only improves the convenience of loading and unloading goods on the ground but also takes into account the needs of unmanned aerial vehicle airdrops. By installing the guiding and electric limiting mechanisms on the standard track of the aviation cargo hold, there is no need to separately open installation holes, and it has the characteristics of quick installation and adjustment.

[0026] 3. The electric limit mechanism for quick replacement of standard containers in the unmanned cargo aircraft cabin. When in the locked position and the unlocked position, after receiving the signal output, the DC motor of the electric limit mechanism is powered off and does not participate in bearing. Therefore, the power consumption of this mechanism is small, and the locked position and the unlocked position have a mechanical holding function, featuring reliable locking.

[0027] 4. The electric limit mechanism for quick replacement of standard containers in the unmanned cargo aircraft cabin. By installing a rotating sleeve on the rocker arm part, the sliding friction when the electric limit mechanism contacts the bottom of the air cargo container can be transformed into rolling friction, greatly reducing the frictional force. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a front view schematic diagram of the structure of the present invention;

[0029] Figure 2 is a top view schematic diagram of the structure of the present invention;

[0030] Figure 3 is a partial side view schematic diagram of the structure of the present invention;

[0031] Figure 4 is a schematic diagram of the mounting seat of the structure of the present invention;

[0032] Figure 5 is a schematic diagram of the large gear of the structure of the present invention;

[0033] Figure 6 is a schematic diagram of the rotating shaft of the structure of the present invention;

[0034] Figure 7 is a schematic diagram of the lock key of the structure of the present invention.

[0035] In the figure: 1. Mounting seat; 2. Limit structure; 201. Rocker arm body; 202. Rotating sleeve; 203. Large gear; 204. First microswitch; 205. Second microswitch; 206. Small gear; 207. Screw; 208. DC motor; 209. Quick replacement component; 210. Spring; 211. First lock key; 212. Second lock key; 213. Key; 214. Rotating shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figure 1-7, A quick-change electric limit mechanism for standard containers in the cabin of an unmanned cargo aircraft, including a mounting base 1, and a limit structure 2 is arranged outside the mounting base 1;

[0038] The limit structure 2 includes a rocker arm body 201, a rotating sleeve 202, a large gear 203, a first microswitch 204, a second microswitch 205, a small gear 206, a screw 207, a DC motor 208, a quick-change assembly 209, a spring 210, a first locking key 211, a second locking key 212, a clamping key 213 and a rotating shaft 214. A rotating shaft 214 is arranged at the top of the mounting base 1, a rocker arm body 201 is arranged outside the rotating shaft 214, a rotating sleeve 202 is arranged outside the rocker arm body 201, a large gear 203 is arranged outside the rotating shaft 214, a first microswitch 204 is arranged on the front of the mounting base 1, a second microswitch 205 is arranged on the front of the mounting base 1, a small gear 206 is meshed outside the large gear 203, a screw 207 is movably installed outside the rocker arm body 201, a DC motor 208 is fixedly installed on the back of the mounting base 1, a quick-change assembly 209 is arranged at the top of the mounting base 1, a spring 210 is arranged inside the rotating shaft 214, a first locking key 211 is arranged outside the rotating shaft 214, a second locking key 212 is arranged outside the rotating shaft 214, and a clamping key 213 is arranged outside the rotating shaft 214.

[0039] According to Figure 1 - Figure 7 As shown, a mechanical guiding device is adopted on the Y-axis and Z-axis to limit the aviation standard freight container, and an electric rocker limit mechanism is adopted in the heading (X-axis) direction. And in order to match the power supply characteristics of the on-board power supply, a DC motor 208 is used as the motor to provide driving force for the rotational movement of the rocker arm body 201.

[0040] According to Figure 1 - Figure 7 As shown, the rocker arm body 201 has two position states. One is the position state of limiting the aviation standard freight container, and the other is the position state of releasing the limit on the aviation standard freight container. Both position states have a mechanical holding function and an in-place signal output. The DC motor 208 is powered off by the in-place signal, and the DC motor 208 does not participate in bearing.

[0041] According to Figure 1 - Figure 7 As shown, after the DC motor 208 is started, the DC motor 208 will drive the small gear 206 to rotate, and the rotation of the small gear 206 will drive the large gear 203 meshed with it to rotate. Because the large gear 203 is connected to the rotating shaft 214, and the rocker arm body 201 is also connected to the rotating shaft 214 through the screw 207, when the DC motor 208 drives the small gear 206 and the large gear 203 to rotate, it will also drive the rocker arm body 201 to rotate.

[0042] In summary, the electric limit mechanism for quick replacement of standard containers in the unmanned cargo aircraft cabin limits the Y-axis and Z-axis through a mechanical guiding mechanism and limits the X-axis through an electric rocker limit mechanism, which can effectively fix the aviation standard cargo container and prevent the movement of the cargo position during flight from affecting the aircraft's center of gravity.

[0043] Moreover, the electric limit mechanism for quick replacement of standard containers in the unmanned cargo aircraft cabin replaces the mooring rope with an electric limit mechanism, which not only improves the convenience of loading and unloading goods on the ground but also takes into account the requirements of the unmanned aerial vehicle (UAV) airdrop. By installing the guiding and electric limit mechanisms on the standard track of the aviation cargo cabin, there is no need to separately drill installation holes, and it has the characteristics of quick installation and adjustment.

[0044] Furthermore, in the electric limit mechanism for quick replacement of standard containers in the unmanned cargo aircraft cabin, when in the locked position and the unlocked position, after receiving the signal output, the DC motor 208 is powered off and does not participate in bearing. Therefore, the power consumption of this mechanism is small, and the locked position and the unlocked position have a mechanical holding function, featuring reliable locking.

[0045] In addition, in the electric limit mechanism for quick replacement of standard containers in the unmanned cargo aircraft cabin, by installing a rotating sleeve 202 on the rocker part, the sliding friction when the electric limit mechanism contacts the bottom of the aviation cargo container can be transformed into rolling friction, greatly reducing the frictional force and solving the problem that in order to meet the requirements of certain specific usage environment, the UAV is required to have the airdrop ability. Since there is no ground crew on the UAV, the mooring rope cannot be untied manually, and there are limitations in using the traditional mooring rope method to fix the aviation standard container in UAV cargo transportation.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0047] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric limit mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft, comprising a mounting seat (1), characterized in that: A limiting structure (2) is provided outside the mounting base (1); The limiting structure (2) includes a rocker arm body (201), a rotating sleeve (202), a large gear (203), a first microswitch (204), a second microswitch (205), a small gear (206), a screw (207), a DC motor (208), a quick-change assembly (209), a spring (210), a first locking key (211), a second locking key (212), a clamping key (213) and a rotating shaft (214). A rotating shaft (214) is provided at the top of the mounting base (1). The outside of the rotating shaft (214) is provided with a rocker arm body (201). The outside of the rocker arm body (201) is provided with a rotating sleeve (202). The outside of the rotating shaft (214) is provided with a large gear (203). A first microswitch (204) is provided on the front of the mounting base (1). A second microswitch (205) is provided on the front of the mounting base (1). The outside of the large gear (203) is meshed with a small gear (206). The outside of the rocker arm body (201) is movably installed with a screw (207). A DC motor (208) is fixedly installed on the back of the mounting base (1). A quick-change assembly (209) is provided at the top of the mounting base (1). A spring (210) is provided inside the rotating shaft (214). A first locking key (211) is provided on the outside of the rotating shaft (214). A second locking key (212) is provided on the outside of the rotating shaft (214). A clamping key (213) is provided on the outside of the rotating shaft (214); A first hole is opened on the back of the mounting base (1). A output shaft is fixedly installed at the output end of the DC motor (208). The front of the output shaft penetrates through the first hole and is fixedly connected to the back of the small gear (206); Two mounting slots are opened on the outside of the rotating shaft (214). The first locking key (211) and the second locking key (212) are respectively located inside the two mounting slots, and both the first locking key (211) and the second locking key (212) are supported by the spring (210).

2. The electric limit mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft according to claim 1, characterized in that: Both the large gear (203) and the small gear (206) are located between the inner front wall and the inner right wall of the mounting base (1), and the small gear (206) is close to the left side of the mounting base (1), and the large gear (203) is close to the right side of the mounting base (1).

3. A quick-change electric limit mechanism for standard containers in the cabin of an unmanned cargo aircraft according to claim 1, characterized in that: The rotating sleeve (202) is located on the right side of the rocker arm body (201). The screw (207) is located on the left side of the rocker arm body (201). The rocker arm body (201) is connected to the rotating shaft (214) through the screw (207).

4. A quick-change electric limit mechanism for standard containers in the cabin of an unmanned cargo aircraft according to claim 1, characterized in that: Both the first locking key (211) and the second locking key (212) are connected to the rotating shaft (214), and the first locking key (211) and the second locking key (212) are symmetrically arranged on the rotating shaft (214).

5. The electric limit mechanism for quick replacement of standard containers in the cargo hold of an unmanned cargo aircraft according to claim 1, characterized in that: A second hole is opened on the front of the mounting base (1). Two limiting slots are opened inside the second hole. The sizes of the first locking key (211) and the second locking key (212) are adapted to the sizes of the two limiting slots.

6. The electric limit mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft according to claim 5, characterized in that: A limiting boss is fixedly installed at the top of the mounting base (1), and the rocker arm body (201) is limited by the limiting boss. Sensors are fixedly installed inside both of the two limiting notches.

7. The electric limit mechanism for quick replacement of standard containers in the cabin of an unmanned cargo aircraft according to claim 1, characterized in that: The process from the limiting state to the limiting release state of the electric limiting mechanism is as follows: (1). After receiving the control signal from the controller, the DC motor (208) starts to rotate; (2). The DC motor (208) drives the small gear (206) to rotate; (3). The small gear (206) drives the large gear (203) to rotate; (4). The large gear (203) rotates a certain angle first. During the rotation process, the large gear (203) compresses the first locking key (211) through the inclined plane. At this time, the compression of the second locking key (212) by the large gear (203) is released. However, at this time, the oppression of the second locking key (212) by the mounting base (1) has not been released yet. Therefore, the second locking key (212) is still in a compressed state. At this time, the first locking key (211) and the second locking key (212) are in a compressed state, and the internal mechanical holding function of the electric limiting mechanism is in a release state; (5). After the mechanical holding function is released, the large gear (203) drives the rotating shaft (214) to rotate through the key (213), and the rocker arm body (201) rotates together with the rotating shaft (214). When it rotates to the limiting release position, the limiting boss on the mounting base (1) limits the rocker arm body (201). At this time, the rocker arm body (201), the rotating shaft (214), the large gear (203), and the small gear (206) will no longer rotate. At this time, the second locking key (212) is ejected under the action of the spring (210) and is embedded in the corresponding limiting notch inside the second hole on the mounting base (1). During the ejection process of the second locking key (212), it touches the sensor inside the limiting notch. The sensor gives a in-place signal, the DC motor (208) is powered off, the electric limiting mechanism obtains the internal mechanical holding function, and the electric limiting mechanism realizes the conversion from the locked state to the unlocked state. Moreover, the movement process of the electric limiting mechanism from the unlocked state to the locked state is opposite to that from the locked state to the unlocked state.

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