A reversing mechanism and aircraft loading and unloading device

Abstract

The application discloses a reversing mechanism and an aircraft loading and unloading device, and relates to the technical field of aircrafts. The first transmission assembly comprises a first transmission shaft capable of moving axially and a first power joint arranged at one end of the first transmission shaft; the second transmission assembly comprises a second transmission shaft capable of moving axially and a second power joint arranged at one end of the second transmission shaft; and the linkage switching assembly is rotationally connected to the first transmission assembly and the second transmission assembly. The linkage switching assembly is configured to act in response to an external trigger and drive the first transmission shaft and the second transmission shaft to produce linkage axial displacement, so as to switch between the first working mode and the second working mode. Therefore, the application realizes reliable and rapid switching of two-way power output by using a single driving source and a simple linkage structure, and has the technical effects of compact structure, small switching impact, simple control, low manufacturing cost and high operation reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aircraft technology, in particular to a reversing mechanism and an aircraft loading and unloading device. BACKGROUND

[0002] In the scenarios of automatic transportation equipment, such as aircraft cargo docking platform, automatic warehouse assembly line, etc., the power of the driving source often needs to be alternately transmitted to the executing mechanism in different directions to realize composite actions (such as lifting and translation), and the core is the reversing mechanism.

[0003] In the prior art, the common reversing scheme has obvious disadvantages: multiple power sources are used to drive each movement direction, which can realize switching, but the cost is high, the control is complex, and there is a problem of synchronization and coordination of multiple power sources; and the scheme of using a single power source in combination with a complex gear train, a clutch and a brake also faces the problems of complex structure, large space occupation, high manufacturing cost, large switching impact and low reliability. SUMMARY

[0004] The embodiment of the present application provides an aircraft loading and unloading device, which solves the problems in the background art.

[0005] In a first aspect, the embodiment of the present application provides a reversing mechanism for selectively transmitting the power of a driving member to a first output end or a second output end, comprising:

[0006] A first transmission assembly comprising a first transmission shaft that can move axially, and a first power joint part provided at one end of the first transmission shaft;

[0007] A second transmission assembly comprising a second transmission shaft that can move axially, and a second power joint part provided at one end of the second transmission shaft;

[0008] A linkage switching assembly rotatably connected to the first transmission assembly and the second transmission assembly;

[0009] The linkage switching assembly is configured to act in response to an external trigger and drive the first transmission shaft and the second transmission shaft to produce linkage axial displacement, thereby switching between a first working mode and a second working mode; in the first working mode, the first power joint part is engaged with the output end of the driving member to transmit power, while the second power joint part is separated from the output end of the driving member; in the second working mode, the first power joint part is separated from the driving member, while the second power joint part is engaged with the output end of the driving member to transmit power.

[0010] In combination with the first aspect, in a possible implementation manner, the linkage switching assembly comprises:

[0011] A rocker mechanism is rotatably connected to the first transmission assembly and the second transmission assembly;

[0012] A first trigger and a second trigger are respectively arranged in the rocker mechanism;

[0013] The first trigger is configured to drive the rocker mechanism to switch from the first working mode to the second working mode when subjected to a first external force;

[0014] The second trigger is configured to drive the rocker mechanism to switch from the second working mode to the first working mode when subjected to a second external force.

[0015] With reference to the first aspect, in a possible implementation manner, the rocker mechanism comprises a first reversing rocker, a second reversing rocker, and a connecting member connecting the first reversing rocker and the second reversing rocker, two ends of the first reversing rocker are rotatably connected to the first transmission shaft and the second transmission shaft, the first trigger is arranged in the first reversing rocker, and the second trigger is arranged in the second reversing rocker.

[0016] With reference to the first aspect, in a possible implementation manner, an end of the second trigger away from the second reversing rocker is a beveled trigger portion.

[0017] With reference to the first aspect, in a possible implementation manner, the first transmission assembly further comprises a driven member arranged at an end of the first transmission shaft away from the first power engagement portion, for transmitting power to the first output end.

[0018] With reference to the first aspect, in a possible implementation manner, the driven member is a bevel gear assembly.

[0019] With reference to the first aspect, in a possible implementation manner, the reversing mechanism further comprises a plurality of reset elements; the plurality of reset elements are respectively arranged on an outer wall of the first trigger, an outer wall of the second trigger, an outer wall of the first transmission shaft, and an outer wall of the second transmission shaft, and the reset elements are configured to provide a reset force to the linkage switching assembly to maintain or assist switching of the linkage switching assembly between the first working mode and the second working mode.

[0020] Secondly, the present application provides an aircraft loading and unloading device, which comprises the reversing mechanism of the first aspect or any possible implementation manner of the first aspect, and further comprises:

[0021] A rack mechanism;

[0022] A driving member is mounted on the rack mechanism;

[0023] A first direction transmission member is rotatably arranged in the rack mechanism;

[0024] a second direction transmission member rotatably arranged on the frame mechanism;

[0025] a cargo transportation mechanism comprising a first direction transportation platform and a second direction transportation platform, the first direction transportation platform being in transmission connection with the first direction transmission member, and the second direction transportation platform being in transmission connection with the second direction transmission member;

[0026] The reversing mechanism is installed on the frame mechanism and connected to the output end of the driving member; a first transmission assembly of the reversing mechanism is in transmission connection with the first direction transmission member, and a second transmission assembly of the reversing mechanism is in transmission connection with the second direction transmission member.

[0027] The first direction transportation platform is configured to trigger the linkage switching assembly when moving to a first preset position, so as to switch the reversing mechanism from a first working mode to a second working mode.

[0028] The second direction transportation platform is configured to trigger the linkage switching assembly when moving to a second preset position, so as to switch the reversing mechanism from the second working mode to the first working mode.

[0029] With reference to the second aspect, in a possible implementation manner, a second trigger of the linkage switching assembly is located on a movement path of the first direction transportation platform, and when the first direction transportation platform moves to a first preset position, a side wall thereof contacts and pushes the second trigger; a first trigger of the linkage switching assembly is located on a movement path of the second direction transportation platform, and when the second direction transportation platform moves to a second preset position, a trigger protrusion thereon contacts and pushes the first trigger.

[0030] With reference to the second aspect, in a possible implementation manner, the second direction transportation platform comprises a cargo fork hook assembly, a trigger protrusion and a sliding block; the sliding block is slidingly connected to the frame mechanism and is in transmission connection with the second direction transmission member; the cargo fork hook assembly is arranged on the sliding block and is configured to be inserted into a bottom of a cargo to move the cargo when moving in a second direction; the trigger protrusion is arranged on the sliding block and is used to push the first trigger to move when the second direction transportation platform moves to a second preset position.

[0031] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects:

[0032] The reversing mechanism provided by the embodiment of the application comprises a first transmission assembly, a second transmission assembly and a linkage switching assembly. The linkage switching assembly is actuated in response to an external trigger, and synchronously drives the first transmission shaft and the second transmission shaft to produce linkage axial displacement, so as to realize selective switching of power between the first output end and the second output end. In the first working mode, the first power engagement part is engaged with the output end of the driving piece to transmit power, and the second power engagement part is automatically separated. In the second working mode, the second power engagement part is engaged to transmit power, and the first power engagement part is synchronously separated. Therefore, the single driving source and the simple linkage structure realize reliable and rapid switching of two-way power output, and have the technical effects of compact structure, small switching impact, simple control, low manufacturing cost and high operation reliability. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0034] Figure 1 The structure schematic diagram of the reversing mechanism provided by the embodiment of the application is shown in the figure.

[0035] Figure 2 The structure schematic diagram of the aircraft loading and unloading device provided by the embodiment of the application is shown in the figure.

[0036] Figure 3 The structure schematic diagram of the first direction transport platform when moving to the first preset position in the first direction is shown in the figure.

[0037] Figure 4 The structure schematic diagram of the second direction transport platform when moving in the second direction is shown in the figure.

[0038] Figure 5 The structure schematic diagram of the second direction transport platform is shown in the figure.

[0039] Figure 6 The structure schematic diagram of the first direction transport platform is shown in the figure.

[0040] Figure 7 The structure schematic diagram of the first mounting platform and the second mounting platform is shown in the figure.

[0041] Figure 8 The structure schematic diagram of the rack mechanism is shown in the figure.

[0042] Figure 9A structural schematic diagram of a motor mounting platform provided by an embodiment of the present application.

[0043] Icon: 1-commutating mechanism; 11-first transmission assembly; 111-first transmission shaft; 112-first power joint; 113-follower; 1131-first bevel gear; 1132-second bevel gear; 12-second transmission assembly; 121-second transmission shaft; 122-second power joint; 13-linkage switching assembly; 131-rocker mechanism; 1311-first commutating rocker; 1312-second commutating rocker; 1313-connector; 132-first trigger; 133-second trigger; 1331-inclined surface trigger part; 134-first guide; 135-second guide; 14-reset element; 2-frame mechanism; 21-horizontal member; 22-vertical member; 23-first mounting platform; 24-second mounting platform; 241-limiting sliding groove; 25-motor mounting platform; 26-first limiting block; 27-second limiting block; 28-roller; 3-driving element; 31-driving motor; 32-first driving gear; 33-second driving gear; 4-first direction transmission element; 5-second direction transmission element; 6-goods transportation mechanism; 61-first direction transportation platform; 611-goods platform; 612-limiting element; 62-second direction transportation platform; 621-goods fork hook assembly; 622-trigger protrusion; 623-sliding block. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] The embodiment of the present application provides a reversing mechanism for selectively transmitting the power of a driving member 3 to a first output end or a second output end. The reversing mechanism 1 comprises a first transmission assembly 11, a second transmission assembly 12 and a linkage switching assembly 13. The first transmission assembly 11 comprises a first transmission shaft 111 which can be axially moved, and a first power engagement portion 112 arranged at one end of the first transmission shaft 111. The second transmission assembly 12 comprises a second transmission shaft 121 which can be axially moved, and a second power engagement portion 122 arranged at one end of the second transmission shaft 121. The linkage switching assembly 13 is rotationally connected to the first transmission assembly 11 and the second transmission assembly 12. Wherein, the linkage switching assembly 13 is configured to act in response to an external trigger, and drive the first transmission shaft 111 and the second transmission shaft 121 to produce linkage axial displacement, so as to switch between a first working mode and a second working mode; in the first working mode, the first power engagement portion 112 is engaged with the output end of the driving member 3 to transmit power, while the second power engagement portion 122 is separated from the output end of the driving member 3. In the second working mode, the first power engagement portion 112 is separated from the driving member 3, while the second power engagement portion 122 is engaged with the output end of the driving member 3 to transmit power.

[0047] It should be noted that the application acts in response to an external trigger through the linkage switching assembly 13, synchronously drives the first transmission shaft 111 and the second transmission shaft 121 to produce linkage axial displacement, thereby realizing selective switching of power between the first output end and the second output end: in the first working mode, the first power engagement part 112 is engaged with the output end of the driving piece 3 to transmit power, while the second power engagement part 122 is automatically separated; in the second working mode, the second power engagement part 122 is engaged to transmit power, while the first power engagement part 112 is synchronously disengaged. Therefore, the application realizes reliable and rapid switching of two-way power output with a single driving source and a simple linkage structure, and has the technical effects of compact structure, small switching impact, simple control, low manufacturing cost and high operation reliability.

[0048] In the embodiment of the application, the linkage switching assembly 13 includes a rocker arm mechanism 131, a first trigger piece 132 and a second trigger piece 133. The rocker arm mechanism 131 is rotatably connected to the first transmission assembly 11 and the second transmission assembly 12. The first trigger piece 132 and the second trigger piece 133 are respectively arranged on the rocker arm mechanism 131. Among them, the first trigger piece 132 is configured to drive the rocker arm mechanism 131 to switch from the first working mode to the second working mode when subjected to a first external force. The second trigger piece 133 is configured to drive the rocker arm mechanism 131 to switch from the second working mode to the first working mode when subjected to a second external force. Specifically, the first trigger piece 132 and the second trigger piece 133 are arranged at different positions of the rocker arm mechanism 131.

[0049] It should be noted that the application realizes stable and accurate switching of the reversing mechanism 1 between the two working modes by using the bidirectional trigger and the lever principle through the rotatable rocker arm mechanism 131 and the first trigger piece 132 and the second trigger piece 133 arranged thereon. The application ensures that the first transmission shaft 111 and the second transmission shaft 121 move synchronously and reversely during the switching process through the mechanical interlocking linkage design, thereby fundamentally avoiding the risk of interference or short circuit during power switching. At the same time, the structure uses simple mechanical trigger and response to replace complex electrical control or hydraulic system, thereby improving the speed and reliability of switching response, reducing the manufacturing cost and control logic complexity.

[0050] In the embodiment of the application, the rocker arm mechanism 131 includes a first reversing rocker arm 1311, a second reversing rocker arm 1312 and a connecting piece 1313 connecting the first reversing rocker arm 1311 and the second reversing rocker arm 1312, both ends of the first reversing rocker arm 1311 are rotatably connected to the first transmission shaft 111 and the second transmission shaft 121, the first trigger piece 132 is arranged on the first reversing rocker arm 1311, and the second trigger piece 133 is arranged on the second reversing rocker arm 1312.

[0051] It should be noted that the rocker arm mechanism 131 of the present application forms a rigid, bidirectional synchronous lever system, which not only ensures that the first transmission shaft 111 and the second transmission shaft 121 produce precise, equal and opposite axial displacements during switching, realizes complete separation and engagement of power engagement, and eliminates motion interference; also, by separating the first trigger 132 and the second trigger 133, the trigger force is dispersed to different positions of the rocker arm mechanism 131, improving the structural stiffness and action stability, making the mode switching more reliable and smooth.

[0052] In the embodiment of the present application, the end of the second trigger 133 away from the second reversing rocker arm 1312 is a beveled trigger part 1331.

[0053] It should be noted that the beveled trigger part 1331 of the present application can efficiently convert the parallel thrust into a radial component force driving the second reversing rocker arm 1312 to rotate when subjected to the second external force, realizing smooth guidance and conversion of the force, reducing the direct driving force required for switching operation, making the action more labor-saving and smooth.

[0054] In the embodiment of the present application, the first transmission assembly 11 further includes a driven part 113 arranged at the end of the first transmission shaft 111 away from the first power engagement part 112, for transmitting power to the first output end.

[0055] It should be noted that the present application completely constructs an independent power transmission path from the driving part 3 to the first output end in a compact space, so that after the first transmission shaft 111 receives power from the driving part 3, it can stably and efficiently output rotational motion to the target execution mechanism through the driven part 113, ensuring the continuity and specificity of power transmission in the first working mode.

[0056] The embodiment of the present application provides an aircraft loading and unloading device, which comprises a first transmission assembly 11, a second transmission assembly 21 and a third transmission assembly 31. Figures 1 to 9The aircraft loading and unloading device comprises the reversing mechanism 1, a rack mechanism 2, a driving member 3, a first direction transmission member 4, a second direction transmission member 5 and a cargo transportation mechanism 6. The driving member 3 is installed on the rack mechanism 2. The first direction transmission member 4 is rotatably arranged on the rack mechanism 2. The second direction transmission member 5 is rotatably arranged on the rack mechanism 2. The cargo transportation mechanism 6 comprises a first direction transportation platform 61 and a second direction transportation platform 62. The first direction transportation platform 61 is in transmission connection with the first direction transmission member 4, and the second direction transportation platform 62 is in transmission connection with the second direction transmission member 5. The reversing mechanism 1 is installed on the rack mechanism 2 and connected to the output end of the driving member 3. The first transmission assembly 11 of the reversing mechanism 1 is in transmission connection with the first direction transmission member 4, and the second transmission assembly 12 of the reversing mechanism 1 is in transmission connection with the second direction transmission member 5. The first direction transportation platform 61 is configured to trigger the linkage switching assembly 13 when moving to the first preset position, so as to switch the reversing mechanism 1 from the first working mode to the second working mode. The second direction transportation platform 62 is configured to trigger the linkage switching assembly 13 when moving to the second preset position, so as to switch the reversing mechanism 1 from the second working mode to the first working mode.

[0057] It should be noted that the reversing mechanism 1 is driven by a single driving member 3 in the present application. Initially, the reversing mechanism 1 is in the first working mode. The power is transmitted to the first direction transmission member 4 through the first transmission assembly 11, so as to drive the first direction transportation platform 61 to move. When the first direction transportation platform 61 moves to the first preset position, the linkage switching assembly 13 is automatically triggered, so as to switch the reversing mechanism 1 to the second working mode. The power is synchronously and linkingly switched to the second transmission assembly 12, so as to drive the second direction transportation platform 62 to move. Similarly, when the second direction transportation platform 62 moves to the second preset position, the switching is triggered again, so as to reset the reversing mechanism 1 to the first working mode, thereby forming an automatic cycle. Therefore, the single driving member 3 can orderly and alternately drive the first direction transportation platform 61 and the second direction transportation platform 62 by means of the highly integrated mechanical linkage and automatic triggering mechanism in the present application. The system structure is simplified, the manufacturing cost and control complexity are reduced, the uniqueness of the power transmission path and the absolute reliability of the switching action are ensured by mechanical interlocking, the motion interference and power short circuit are effectively avoided, and finally the compact, efficient and fully automatic bidirectional cargo transportation is realized in the application scenario of aircraft loading and unloading which has high requirements on space, weight and reliability.

[0058] In the embodiments of the present application, the second trigger 133 of the linkage switching assembly 13 is located on the movement path of the first direction transport platform 61, and when the first direction transport platform 61 moves to the first preset position, the side wall thereof contacts and pushes the second trigger 133. The first trigger 132 of the linkage switching assembly 13 is located on the movement path of the second direction transport platform 62, and when the second direction transport platform 62 moves to the second preset position, the trigger protrusion 622 thereon contacts and pushes the first trigger 132.

[0059] It should be noted that the present application realizes a full mechanical automatic switching trigger mechanism without external sensing and control signals, so that the first direction transport platform 61 and the second direction transport platform 62 can trigger the reversing mechanism 1 to perform mode conversion in time and accurately after completing their respective strokes, thereby saving a complex electric control detection and feedback system and reducing the cost and failure rate.

[0060] In a specific embodiment of the present application, the rack mechanism 2 includes a vertical member 22, a horizontal member 21, a first mounting platform 23, a second mounting platform 24, and a motor mounting platform 25. The first mounting platform 23 and the second mounting platform 24 are spaced apart along the height direction of the vertical member 22. The motor mounting platform 25 is fixed to the top of the second mounting platform 24 through a support member and is located between the second mounting platform 24 and the first mounting platform 23. The driving member 3 includes a driving motor 31, a first driving gear 32, and a second driving gear 33, which are all integrally installed on the motor mounting platform 25. The output end of the driving motor 31 is connected with the first driving gear 32, and the first driving gear 32 is in meshing relationship with the second driving gear 33. The reversing mechanism 1 is installed on the rack mechanism 2 and is connected to the output end of the driving member 3.

[0061] Specifically, the first transmission shaft 111 and the second transmission shaft 121 of the reversing mechanism 1 are both rotationally arranged on the first mounting platform 23. The first trigger 132 and the second trigger 133 of the linkage switching assembly 13 are guided to move by a first guide 134 and a second guide 135 installed on the first mounting platform 23 and the second mounting platform 24, respectively, to ensure the accuracy of their actions. In addition, a limiting sliding groove 241 adapted to the turning of the second reversing rocker arm 1312 is formed on the second mounting platform 24, and the second reversing rocker arm 1312 is slidingly connected in the limiting sliding groove 241, thereby physically limiting the turning angle thereof.

[0062] In a specific embodiment of the present application, the first direction transmission member 4 is a lifting transmission rod, which is rotationally arranged on the vertical member 22. The second direction transmission member 5 is a horizontal transmission rod, which is rotationally arranged on the horizontal member 21.

[0063] The cargo transportation mechanism 6 comprises a first direction transportation platform 61 and a second direction transportation platform 62. The first direction is the vertical direction, and the second direction is the horizontal direction.

[0064] The first direction transportation platform 61 is a lifting transportation platform, which is slidingly connected to the vertical member 22 and is drivingly connected to the first direction transmission member 4 (i.e. the lifting transmission rod) through screw transmission or other means, so as to realize vertical movement when the first direction transmission member 4 rotates. The first direction transportation platform 61 (i.e. the lifting transportation platform) comprises a cargo platform 611 for carrying cargo and a plurality of limiting members 612 arranged on the top surface thereof, which are used for limiting the cargo during transportation. The side wall of the cargo platform 611 is configured to contact and push the second trigger 133 of the linkage switching assembly 13 when it moves to the first preset position.

[0065] The second direction transportation platform 62 is a horizontal transportation platform, which comprises a sliding block 623, a cargo fork hook assembly 621 and a trigger protrusion 622. The sliding block 623 is slidingly connected to the horizontal member 21 and is drivingly connected to the second direction transmission member 5 (i.e. the horizontal transmission rod). The cargo fork hook assembly 621 is arranged on the sliding block 623 and is configured to be inserted into the bottom of the cargo to move the cargo when the sliding block 623 moves in the horizontal direction. The trigger protrusion 622 is arranged on the sliding block 623 and is used to contact and push the first trigger 132 of the linkage switching assembly 13 when the horizontal transportation platform moves to the second preset position.

[0066] On the power transmission path, the first transmission assembly 11 of the reversing mechanism 1 is drivingly connected to the lifting transmission rod through its driven member 113.

[0067] Specifically, the driven member 113 is a bevel gear assembly, which comprises a first bevel gear 1131 fixed to the first transmission shaft 111 at the end away from the first power joint 112 and a second bevel gear 1132 fixedly connected to the top end of the lifting transmission rod, both of which are in meshing engagement, so as to convert the rotary motion of the first transmission shaft 111 into the rotary motion of the lifting transmission rod.

[0068] The second transmission assembly 12 of the reversing mechanism 1 is directly connected to the horizontal transmission rod at the end away from the second power joint 122 through a coupling or spline connection, so as to transmit power.

[0069] The application automatically switches the working mode in response to the position change of the lifting transport platform or the horizontal transport platform through the reversing mechanism 1. In the initial state, the reversing mechanism 1 is in the first working mode, the first power engagement part 112 is engaged with the first driving gear 32 of the driving part 3, and the power is transmitted to the lifting transmission rod through the first transmission shaft 111 and the bevel gear assembly in turn, driving the lifting transport platform to vertically ascend. When the lifting transport platform moves to the first preset position, the side wall pushes the second trigger 133, triggering the linkage switching assembly 13 to act, so that the reversing mechanism 1 switches to the second working mode. At this time, the first power engagement part 112 is separated from the first driving gear 32, and the second power engagement part 122 is engaged with the second driving gear 33, and the power is transmitted to the horizontal transmission rod through the second transmission shaft 121, driving the horizontal transport platform to horizontally move, and performing the fork picking or unloading work. When the horizontal transport platform moves to the second preset position, the trigger protrusion 622 on the slider 623 pushes the first trigger 132, triggering the linkage switching assembly 13 again, so that the reversing mechanism 1 resets to the first working mode, and the next cycle begins.

[0070] To ensure the operation safety, the first limiting block 26 is arranged at both ends of the horizontal member 21 for limiting the moving stroke of the horizontal transport platform, and the second limiting block 27 is arranged at both ends of the vertical member 22 for limiting the moving stroke of the lifting transport platform.

[0071] Further, to improve the maneuverability and deployment flexibility of the whole device, the horizontal rod assembly is arranged at the bottom of the vertical member 22, and the plurality of rollers 28 are arranged at the bottom of the horizontal rod assembly in the circumferential direction, so that the aircraft loading and unloading device can be conveniently moved and positioned according to the parking position of the aircraft or the site requirement.

[0072] In the embodiment of the application, the reversing mechanism 1 further includes a plurality of reset elements 14. The plurality of reset elements 14 are respectively arranged on the outer wall of the first trigger 132, the outer wall of the second trigger 133, the outer wall of the first transmission shaft 111 and the outer wall of the second transmission shaft 121, and the reset element 14 is configured to provide a reset force to the linkage switching assembly 13 to maintain or assist the switching between the first working mode and the second working mode.

[0073] In the embodiments of the present application, the reset element 14 is preferably a compression spring, and can be divided into shaft reset springs and trigger reset springs according to the installation position and function. The shaft reset springs are sleeved on the first transmission shaft 111 and the second transmission shaft 121 respectively, and the first transmission shaft 111 and the second transmission shaft 121 are both fixed with two limiting bosses, and the shaft reset springs are pre-compressed between the corresponding two limiting bosses. The limiting boss away from the first power joint 112 and the second power joint 122 abuts against the end of the first reversing rocker arm 1311. This structure enables the first reversing rocker arm 1311 to push the first transmission shaft 111 or the second transmission shaft 121 to move axially when the first reversing rocker arm 1311 rotates; and when the external trigger force disappears, the reset force of the shaft reset spring drives the corresponding first transmission shaft 111 or the second transmission shaft 121 to return to the initial position. The trigger reset spring is sleeved on the outer wall of the first trigger 132 and the second trigger 133, and is accommodated in the first guide 134 and the second guide 135, and is used to automatically reset the first trigger 132 or the second trigger 133 to the waiting trigger position after triggering. The synergistic effect of all these reset elements 14 ensures that the linkage switching assembly 13 can complete stable and reliable mode switching and reset cycles.

[0074] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly explains the difference from other embodiments.

[0075] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A reversing mechanism for selectively transmitting motive power of a drive member (3) to a first output or a second output, characterized in that, The utility model relates to a power transmission device, comprising: a first transmission assembly (11) comprising a first transmission shaft (111) axially movable, and a first power engagement part (112) arranged at one end of the first transmission shaft (111); a second transmission assembly (12) comprising a second transmission shaft (121) axially movable, and a second power engagement part (122) arranged at one end of the second transmission shaft (121); a linkage switching assembly (13) rotatably connected to the first transmission assembly (11) and the second transmission assembly (12); the linkage switching assembly (13) comprises: a rocker mechanism (131) rotatably connected to the first transmission assembly (11) and the second transmission assembly (12); a first trigger (132) and a second trigger (133) arranged at the rocker mechanism (131) respectively; the rocker mechanism (131) comprises a first reversing rocker (1311), a second reversing rocker (1312), and a connecting piece (1313) connecting the first reversing rocker (1311) and the second reversing rocker (1312), both ends of the first reversing rocker (1311) are rotatably connected to the first transmission shaft (111) and the second transmission shaft (121), the first trigger (132) is arranged at the first reversing rocker (1311), and the second trigger (133) is arranged at the second reversing rocker (1312); wherein, the linkage switching assembly (13) is configured to act in response to an external trigger and drive the first transmission shaft (111) and the second transmission shaft (121) to produce linkage axial displacement, so as to switch between a first working mode and a second working mode; in the first working mode, the first power engagement part (112) is engaged with the output end of the driving piece (3) to transmit power, while the second power engagement part (122) is separated from the output end of the driving piece (3); in the second working mode, the first power engagement part (112) is separated from the driving piece (3), while the second power engagement part (122) is engaged with the output end of the driving piece (3) to transmit power.

2. The commutating mechanism of claim 1, wherein, the first trigger (132) is configured to drive the rocker mechanism (131) to switch from the first working mode to the second working mode when subjected to a first external force; the second trigger (133) is configured to drive the rocker mechanism (131) to switch from the second working mode to the first working mode when subjected to a second external force.

3. The commutating mechanism of claim 1, wherein, an end of the second trigger (133) away from the second reversing rocker (1312) is a beveled trigger part (1331).

4. The commutating mechanism of claim 1, wherein, the first transmission assembly (11) further comprises a driven piece (113) arranged at an end of the first transmission shaft (111) away from the first power engagement part (112), for transmitting power to the first output end.

5. The commutating mechanism of claim 4, wherein, the driven piece (113) is a bevel gear assembly.

6. The commutating mechanism of claim 1, wherein, a plurality of reset elements (14) are further included; A plurality of reset elements (14) are respectively arranged on the outer wall of the first trigger (132), the outer wall of the second trigger (133), the outer wall of the first transmission shaft (111), and the outer wall of the second transmission shaft (121). The reset elements (14) are configured to provide a reset force to the linkage switching assembly (13) to maintain or assist the switching between the first working mode and the second working mode.

7. An aircraft unloading device, characterized in that The reversing mechanism according to any one of claims 1-6, further comprising: a rack mechanism (2); a driving member (3) mounted on the rack mechanism (2); a first direction transmission member (4) rotatably arranged on the rack mechanism (2); a second direction transmission member (5) rotatably arranged on the rack mechanism (2); a cargo transportation mechanism (6) comprising a first direction transportation platform (61) and a second direction transportation platform (62), the first direction transportation platform (61) being in transmission connection with the first direction transmission member (4), and the second direction transportation platform (62) being in transmission connection with the second direction transmission member (5); wherein the reversing mechanism (1) is mounted on the rack mechanism (2) and connected to the output end of the driving member (3); the first transmission assembly (11) of the reversing mechanism (1) is in transmission connection with the first direction transmission member (4), and the second transmission assembly (12) of the reversing mechanism (1) is in transmission connection with the second direction transmission member (5); the first direction transportation platform (61) is configured to trigger the linkage switching assembly (13) when moving to a first preset position, so as to switch the reversing mechanism (1) from the first working mode to the second working mode; the second direction transportation platform (62) is configured to trigger the linkage switching assembly (13) when moving to a second preset position, so as to switch the reversing mechanism (1) from the second working mode to the first working mode.

8. The aircraft on-off device according to claim 7, wherein, the second trigger (133) of the linkage switching assembly (13) is located on the movement path of the first direction transportation platform (61), and when the first direction transportation platform (61) moves to the first preset position, the side wall thereof contacts and pushes the second trigger (133); the first trigger (132) of the linkage switching assembly (13) is located on the movement path of the second direction transportation platform (62), and when the second direction transportation platform (62) moves to the second preset position, the trigger protrusion (622) thereon contacts and pushes the first trigger (132).

9. The aircraft on-ground loading device of claim 8, wherein, the second direction transportation platform (62) comprises a cargo fork hook assembly (621), a trigger protrusion (622), and a sliding block (623); the sliding block (623) is slidingly connected to the rack mechanism (2) and is in transmission connection with the second direction transmission member (5); the cargo fork hook assembly (621) is arranged on the sliding block (623) and is configured to be inserted into the bottom of a cargo to move the cargo when moving in the second direction; The trigger protrusion (622) is arranged on the slider (623) and used to push the first trigger (132) to move when the second direction transport platform (62) moves to the second preset position.

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