A shear bracing with a twist surface posture adjusting function of a loading and unloading platform

Abstract

The application discloses a shear support with a loading and unloading platform torsion surface posture adjusting function, which is installed on a transfer vehicle, and a loading and unloading platform is arranged above the shear support. The shear support comprises an outer support, an inner support is hinged to the inner wall of the outer support, a horizontal roll adjusting mechanism for connecting the loading and unloading platform is arranged at the upper end of the outer support, a first roller mechanism for connecting the transfer vehicle is arranged at the lower end of the outer support, a second roller mechanism for connecting the loading and unloading platform is arranged at the upper end of the inner support, and the lower end of the inner support is hinged to the transfer vehicle. The application has the beneficial effects that the loading and unloading platform reaches the posture of torsion surface through the pitching adjusting mechanism, the height adjusting mechanism and the horizontal roll adjusting mechanism, can be freely switched among various postures, realizes smooth connection with the platform for storing / receiving goods and the airplane cargo transportation system, enhances the horizontal anti-overturning safety of the whole machine, effectively reduces the cost of the equipment and has good economy.

Description

Technical Field

[0001] This invention relates to the field of cargo handling and loading technology in airports, and particularly to a shear brace with a tilting attitude adjustment function for loading and unloading platforms. Background Technology

[0002] A lifting loading and unloading platform is a large airport shuttle vehicle capable of loading, unloading, and transferring bulk cargo and standard containerized cargo. A lifting loading and unloading platform generally consists of a shuttle vehicle, a loading and unloading platform, and scissor bracing installed between the shuttle vehicle and the loading and unloading platform. Currently, existing shuttle vehicle lifting loading and unloading platforms only have vertical lifting capabilities, with a limited range of attitude adjustment, resulting in significant limitations in use and impacting the efficiency of cargo loading and unloading.

[0003] Patent application number "201520573824.8" discloses "an airport lifting and loading platform attitude adjustment device". Although it realizes the attitude adjustment of the lifting and loading platform, it still has certain shortcomings, mainly in the following aspects: 1. The four lifting cylinders are respectively located below the two ends of the two lateral offset cylinders. This structural form determines that its vertical attitude adjustment mainly realizes the function of adjusting the longitudinal slope and transverse slope within a certain range. If the cylinders are on different planes, it will affect the service life of the lateral cylinders and may also cause jamming during lateral movement, affecting the realization of the lateral movement function.

[0004] Due to the aforementioned structural limitations, the load-unloading platform's ability to adapt to distortion is extremely limited. Furthermore, during airport cargo loading and unloading, the probability of the aircraft's unloading platform and the cargo storage or receiving platform being on the same plane is extremely low due to the randomness of the aircraft's attitude. It is highly likely that they are on two different planes. This requires the load-unloading platform to be able to adapt to a certain range of distortion in order to smoothly connect the aircraft's unloading platform and the cargo storage or receiving platform, thus enabling the smooth transfer of cargo.

[0005] 2. When adjusting the lateral position of the lifting and loading platform, the two lateral offset cylinders simultaneously adjust the lateral position of the platform and the cargo. This means that there is a certain lateral offset between the center of gravity of the platform and cargo and the center of gravity of the lower shuttle vehicle and scissor bracing. The loading and unloading platform is several meters high when loading and unloading cargo, and the offset of the top center of gravity weakens the lateral anti-tipping safety of the entire machine. Summary of the Invention

[0006] The purpose of this invention is to provide a shear brace with a twisting attitude adjustment function for the loading and unloading platform, which can adjust the loading and unloading platform in multiple attitudes, so that the loading and unloading platform can be smoothly connected with the platform for storing / receiving goods and the aircraft cargo system, while effectively reducing the cost of the device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A scissor brace with a torsional attitude adjustment function for a loading and unloading platform is provided. The scissor brace is installed on a shuttle vehicle, and a loading and unloading platform is provided above the scissor brace. The scissor brace includes an outer brace, and an inner brace is hinged to the inner wall of the outer brace. A roll adjustment mechanism for connecting the loading and unloading platform is provided at the upper end of the outer brace, and a first roller mechanism for connecting the shuttle vehicle is provided at the lower end of the outer brace. A second roller mechanism for connecting the loading and unloading platform is provided at the upper end of the inner brace, and the lower end of the inner brace is hinged to the shuttle vehicle. The inner support is equipped with a pitch adjustment mechanism, and the outer support is equipped with a height adjustment mechanism between it and the shuttle vehicle.

[0008] Preferably, the external support includes two parallel external shear beams, and a first crossbeam connecting the two external shear beams is provided between them. The first crossbeam is provided with an ear seat, which is connected to the upper end of the height adjustment mechanism. The upper end of the external shear beam is provided with a U-shaped groove for connecting the roll adjustment mechanism.

[0009] Preferably, the roll adjustment mechanism includes a roll cylinder, the side wall of which is provided with a protrusion that can extend into a U-shaped groove, and a roll cylinder pin for connecting to the loading and unloading platform is provided above the roll cylinder.

[0010] Preferably, an arc-shaped reinforcing plate is provided on the outer side of the U-shaped groove. The arc-shaped reinforcing plate has a notch for easy entry of the protrusion. An arc-shaped cap for sealing is provided at the notch. The inner walls of the arc-shaped reinforcing plate and the arc-shaped cap form a circular outline that matches the protrusion.

[0011] Preferably, the internal support includes two parallel internal shear support beams, each internal shear support beam comprising a lower internal shear support section and an upper internal shear support section hinged to each other. A second crossbeam is provided between the two lower internal shear support sections to connect them as a whole, and a connecting beam is provided between the two upper internal shear support sections to connect them as a whole.

[0012] Preferably, the lower section of the inner shear support includes a lower section beam of the inner shear support, and a crank arm is provided at the upper end of the lower section beam of the inner shear support. The crank arm is provided with a first mounting hole for the pitch mechanism that connects to one end of the pitch adjustment mechanism. The upper section of the inner shear support includes an upper beam, and the upper beam is provided with a second mounting hole for the pitch mechanism that connects to the other end of the pitch adjustment mechanism.

[0013] Preferably, the pitch adjustment mechanism and the altitude adjustment mechanism have the same structure; The pitch adjustment mechanism includes a pitch adjustment cylinder, and the two ends of the pitch adjustment cylinder are respectively provided with an upper pitch adjustment cylinder pin and a lower pitch adjustment cylinder pin.

[0014] Preferably, the first roller mechanism and the second roller mechanism have the same structure; The first roller mechanism includes a first roller shaft, and a first roller is rotatably disposed on the outer side of the first roller shaft.

[0015] Preferably, it further includes a mechanical limiting device for limiting the movement of the shear brace, the mechanical limiting device being disposed on the slide of the first roller mechanism.

[0016] Preferably, the mechanical limiting device includes a roller stop, the roller stop having an arc surface that matches the first roller, and the sidewalls of the roller stop being provided with a positioning shaft and a handle, respectively.

[0017] The beneficial effects of this invention are as follows: 1. The loading and unloading platform can achieve a twisted posture through pitch adjustment mechanism, height adjustment mechanism and roll adjustment mechanism, so that it can switch freely between multiple postures and realize smooth connection with the storage / receiving platform and the aircraft cargo system; at the same time, it also enhances the lateral anti-overturning safety of the whole machine, and can also effectively reduce the cost of equipment, which has good economic benefits.

[0018] 2. This device adopts an internal and external support structure to form a shear support whole. The main structure is symmetrical in the lateral direction and has a compact structure.

[0019] 3. The roll adjustment mechanism of this device can adjust the angle of the loading and unloading platform through the roll cylinder. Combined with the pitch adjustment mechanism and the height adjustment mechanism, it can achieve the adjustment of the loading and unloading platform at any height and any angle.

[0020] 4. The upper end of the external shear support beam is provided with a U-shaped groove. An arc-shaped reinforcing plate and an arc-shaped pressure cap are provided on the outside of the U-shaped groove, which can easily install and fix the horizontal rolling cylinder, making the operation more convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is the front view of this application; Figure 3 This is a schematic diagram of the external support structure in this application; Figure 4 for Figure 3 A magnified view of a section at point I; Figure 5 This is a schematic diagram of the internal support structure in this application; Figure 6 for Figure 4 Schematic diagram of the lower section of the inner shear brace; Figure 7 for Figure 4 Schematic diagram of the upper section of the inner shear brace; Figure 8 This is a schematic diagram of the roll adjustment mechanism in this application; Figure 9 This is a schematic diagram of the pitch adjustment mechanism in this application; Figure 10 This is a schematic diagram of the height adjustment mechanism in this application; Figure 11 This is a schematic diagram and cross-sectional view of the first roller mechanism in this application; Figure 12 This is a schematic diagram and cross-sectional view of the second roller mechanism in this application; Figure 13 This is a schematic diagram of the mechanical movement limiting device in this application.

[0022] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings. Example

[0024] like Figure 1 and Figure 2 As shown in the figure, this embodiment of a scissor brace with a loading and unloading platform torsion attitude adjustment function needs to be installed on a shuttle vehicle during use. The loading and unloading platform is set above the scissor brace. The shuttle vehicle can drive the scissor brace and the loading and unloading platform to move the goods on the loading and unloading platform to a designated location. The scissor brace can control the loading and unloading platform to adjust its height and angle, thereby adapting to different platforms for storing / receiving goods, aircraft cargo systems, and goods of different shapes and sizes. The scissor brace includes an outer support 1. The inner wall of the outer support 1 is hinged to an inner support 2 through a first pin 3. The upper end of the outer support 1 is provided with a roll adjustment mechanism 4 that connects to the loading and unloading platform. By extending and retracting the roll adjustment mechanism 4, the height of the loading and unloading platform (i.e., the connection between the loading and unloading platform and the roll adjustment mechanism 4) connected to it can be adjusted. The lower end of the outer support 1 is provided with a first roller mechanism 5 that connects to the shuttle vehicle. The upper end of the inner support 2 is provided with a second roller mechanism 7 that connects to the loading and unloading platform. The lower end of the inner support 2 is hinged to the shuttle vehicle through a third pin 8. The inner support 2 is equipped with a pitch adjustment mechanism 10. By extending and retracting the pitch adjustment mechanism 10, the height of the inner support 2 can be adjusted, thereby adjusting the height of the loading and unloading platform (the connection between the loading and unloading platform and the inner support 2). The outer support 1 and the shuttle vehicle are equipped with a height adjustment mechanism 9. By extending and retracting the height adjustment mechanism 9, the angle between the outer support 1 and the inner support 2 can be adjusted, thereby adjusting the tilt angle of the loading and unloading platform.

[0025] like Figure 3 and Figure 4 As shown, the outer support 1 is an H-shaped frame structure composed of box beams, including two parallel variable cross-section folded line outer shear support beams 1-1. A first crossbeam 1-2 is provided between the two outer shear support beams 1-1 to connect them as one unit. An ear seat 1-3 is provided on the first crossbeam 1-2. The ear seat 1-3 is connected to the upper end of the height adjustment mechanism 9. A U-shaped groove 1-5 for connecting the horizontal rolling adjustment mechanism 4 is opened at the upper end of the outer shear support beam 1-1. A first roller mechanism connecting hole 1-8 for connecting the first roller mechanism 5 is opened at the lower end of the outer shear support beam 1-1.

[0026] A first pin outer hole 1-4 is provided in the middle of the outer shear beam 1-1, through which the first pin 3 passes. A copper sleeve is installed in the first pin outer hole 1-4 to make the rotation of the first pin 3 smoother and extend the service life of the equipment.

[0027] like Figure 8 As shown, the roll adjustment mechanism 4 includes a roll cylinder 4-1. The side wall of the roll cylinder 4-1 is provided with a protrusion 4-3 that can extend into the U-shaped groove 1-5. A roll cylinder pin 4-2 connecting the roll cylinder 4-1 to the loading and unloading platform is provided above the roll cylinder 4-1. When the roll cylinder 4-1 extends or retracts, it can drive the loading and unloading platform connected to it to move up and down, thereby realizing the angle adjustment of the loading and unloading platform.

[0028] An arc-shaped reinforcing plate 1-6 is provided on the outer side of the U-shaped groove 1-5. The arc-shaped reinforcing plate 1-6 has a notch to facilitate the entry of the protrusion 4-3. An arc-shaped pressure cap 1-7 is provided at the notch for sealing. The inner walls of the arc-shaped reinforcing plate 1-6 and the arc-shaped pressure cap 1-7 form a circular outline that matches the protrusion 4-3. When inserting the protrusion 4-3, first remove the arc-shaped pressure cap 1-7, insert the protrusion 4-3 into the notch and the U-shaped groove 1-5, and then install the arc-shaped pressure cap 1-7.

[0029] A copper sleeve is installed inside the U-shaped groove 1-5, which makes the rotation of the protrusion 4-3 smoother when the horizontal rolling cylinder 4-1 extends and retracts, and at the same time extends the service life of the equipment.

[0030] like Figure 5 — Figure 7 As shown, the inner brace 2 includes two parallel inner shear beams. Each inner shear beam comprises a lower inner shear beam 2-1 and an upper inner shear beam 2-2 hinged to each other. The lower inner shear beam 2-1 and the upper inner shear beam 2-2 are connected by a second pin 2-3. A second crossbeam 2-1-2 is provided between the two lower inner shear beams 2-1 to connect them as a whole, forming an H-shaped frame structure composed of box beams.

[0031] The lower section 2-1 of the inner shear support is composed of a variable cross-section polygonal inner shear support beam 2-1-1 with a crank arm 2-1-4 at one end. The lower section 2-1-1 has a first pin inner hole 2-1-3 for mounting the first pin 3, and a copper sleeve is installed inside the first pin inner hole 2-1-3. The lower end of the lower section 2-1-1 has a third pin hole 2-1-7, through which a third pin 8 passes. The lower section 2-1-1 is hinged to the shuttle vehicle via the third pin 8. The upper end of the lower section 2-1-1 has a second pin outer hole 2-1-5 through which a second pin 2-3 passes. The crank arm 2-1-4 has a first mounting hole 2-1-6 for the pitch adjustment mechanism 10, which connects to the lower end of the pitch adjustment mechanism 10.

[0032] A connecting beam 2-2-2 is provided between the two upper sections of the inner shear brace 2-2 to form an H-shaped frame structure composed of box beams. The upper section of the inner shear brace 2-2 includes a variable cross-section polygonal inner shear brace upper section beam 2-2-1. The lower end of the upper section beam 2-2-1 has a second pin hole 2-2-3 through which the second pin 2-3 passes. The middle part of the upper section beam 2-2-1 has a second mounting hole 2-2-4 for the pitch adjustment mechanism 10, which connects to the upper end of the pitch adjustment mechanism 10. The upper end of the upper section beam 2-2-1 has a second roller mechanism connecting hole 2-2-5 for the second roller mechanism 7.

[0033] The pitch adjustment mechanism 10 and the altitude adjustment mechanism 9 have the same structure; like Figure 9 As shown, the pitch adjustment mechanism 10 includes a pitch adjustment cylinder 10-1. The upper end pin 10-3 and the lower end pin 10-2 of the pitch adjustment cylinder 10-1 are respectively provided at both ends. The upper end pin 10-3 extends into the second mounting hole 2-2-4 of the pitch mechanism and connects to the upper section 2-2 of the inner shear support. The lower end pin 10-2 extends into the first mounting hole 2-1-6 of the pitch mechanism and connects to the lower section 2-1 of the inner shear support. When the pitch adjustment cylinder 10-1 extends or retracts, it can drive the upper section 2-2 of the inner shear support to swing up and down, thereby driving the loading and unloading platform (the connection between the loading and unloading platform and the second roller mechanism 7) to move up and down, thus realizing the angle adjustment of the loading and unloading platform.

[0034] like Figure 10 As shown, the height adjustment mechanism 9 includes a height adjustment cylinder 9-1. The height adjustment cylinder 9-1 has an upper pin 9-3 and a lower pin 9-2 at its two ends. The upper pin 9-3 extends into the lug 1-3 and connects to the outer shear beam 1-1. The lower pin 9-2 connects to the shuttle vehicle. When the height adjustment cylinder 9-1 extends or retracts, the outer support 1 rotates relative to the inner support 2 (supported by the first pin 3), thus adjusting the angle of the loading / unloading platform.

[0035] The first roller mechanism 5 and the second roller mechanism 7 have the same structure; like Figure 11 As shown, the first roller mechanism 5 includes a first roller shaft 5-2, and a first roller 5-1 is rotatably mounted on one end of the outer side of the first roller shaft 5-2. The other end of the first roller shaft 5-2 extends into the connecting hole 1-8 of the first roller mechanism and connects to the outer shear support beam 1-1. To reduce the friction of the first roller 5-1 and extend its service life, a first roller bushing 5-4 is also provided between the first roller 5-1 and the first roller shaft 5-2. To prevent the first roller bushing 5-4 from accidentally falling out, a first spacer 5-3 is provided on the end face of the first roller 5-1. When the outer support 1 rotates, its lower end can move through the first roller mechanism 5, making its rotation process smoother and more stable.

[0036] like Figure 12 As shown, the second roller mechanism 7 includes a second roller shaft 7-2. A first roller 7-1 is rotatably mounted on one end of the outer side of the second roller shaft 7-2, and the other end extends into the second roller mechanism connecting hole 2-2-5 to connect to the upper section 2-2 of the inner shear support. A second roller bushing 7-4 is also provided between the second roller 7-1 and the second roller shaft 7-2, and a second spacer 7-3 is provided on the end face of the second roller 7-1. When the upper section 2-2 of the inner shear support rotates, its upper end can move through the second roller mechanism 7, making its rotation process smoother and more stable.

[0037] like Figure 13 As shown, the shear brace in this embodiment also includes a mechanical limiting device 6 for limiting its movement. The mechanical limiting device 6 is disposed on the slide of the first roller mechanism 5, which is disposed on the shuttle vehicle. By limiting the first roller mechanism 5 with the mechanical limiting device 6, accidents are prevented from occurring due to the outer shear brace beam 1-1 and the outer support 1 exceeding their maximum stroke.

[0038] The mechanical limiting device 6 includes a roller stop 6-1, which has an arc surface that matches the first roller 5-1. The side wall of the roller stop 6-1 is provided with a positioning shaft 6-2 and a handle 6-3.

[0039] During assembly, the scissor brace is first installed on the shuttle vehicle, and then the loading and unloading platform is installed on its upper end. Following this, mechanical movement limiting devices 6 are installed at designated positions according to the equipment's travel distance. During use, the roll adjustment mechanism 4, pitch adjustment mechanism 10, and height adjustment mechanism 9 can be extended and retracted to adapt to different loading and unloading heights and angles, greatly improving cargo handling efficiency.

[0040] The above embodiments are not intended to limit the shape, material, structure, etc. of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0042] If the terms "A" or "B" are used in this document to define components, those skilled in the art should know that the use of "A" and "B" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scissor brace with a loading / unloading platform twisting attitude adjustment function, wherein the scissor brace is installed on a shuttle vehicle and a loading / unloading platform is provided above the scissor brace, characterized in that: The shear support includes an outer support (1), and an inner support (2) is hinged to the inner wall of the outer support (1). The upper end of the outer support (1) is provided with a horizontal rolling adjustment mechanism (4) that connects to the loading and unloading platform. The lower end of the outer support (1) is provided with a first roller mechanism (5) that connects to the shuttle vehicle. The upper end of the inner support (2) is provided with a second roller mechanism (7) that connects to the loading and unloading platform. The lower end of the inner support (2) is hinged to the shuttle vehicle. The inner support (2) is provided with a pitch adjustment mechanism (10), and the outer support (1) is provided with a height adjustment mechanism (9) between it and the shuttle vehicle.

2. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 1, characterized in that, The external support (1) includes two parallel external shear support beams (1-1), and a first crossbeam (1-2) connecting the two external shear support beams (1-1) is provided between them. The first crossbeam (1-2) is provided with an ear seat (1-3), and the ear seat (1-3) is connected to the upper end of the height adjustment mechanism (9). The upper end of the external shear support beam (1-1) is provided with a U-shaped groove (1-5) for connecting the roll adjustment mechanism (4).

3. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 2, characterized in that, The rolling adjustment mechanism (4) includes a rolling cylinder (4-1), the side wall of which is provided with a protrusion (4-3) that can extend into a U-shaped groove (1-5), and a rolling cylinder pin (4-2) for connecting the loading and unloading platform is provided above the rolling cylinder (4-1).

4. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 3, characterized in that, An arc-shaped reinforcing plate (1-6) is provided on the outer side of the U-shaped groove (1-5). The arc-shaped reinforcing plate (1-6) has a notch that facilitates the entry of the protrusion (4-3). An arc-shaped cap (1-7) for sealing is provided at the notch. The inner walls of the arc-shaped reinforcing plate (1-6) and the arc-shaped cap (1-7) form a circular outline that matches the protrusion (4-3).

5. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 1, characterized in that, The inner brace (2) includes two parallel inner shear beams. The inner shear beams include a lower inner shear beam (2-1) and an upper inner shear beam (2-2) that are hinged to each other. A second crossbeam (2-1-2) is provided between the two lower inner shear beams (2-1) to connect them as one unit. A connecting beam (2-2-2) is provided between the two upper inner shear beams (2-2) to connect them as one unit.

6. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 5, characterized in that, The lower section of the inner shear support (2-1) includes an inner shear support lower section beam (2-1-1), and a crank arm (2-1-4) is provided at the upper end of the inner shear support lower section beam (2-1-1). The crank arm (2-1-4) is provided with a first mounting hole (2-1-6) for the pitch adjustment mechanism (10) connected to one end of the pitch adjustment mechanism (10). The upper section of the inner shear support (2-2) includes an upper section beam of the inner shear support (2-2-1), and the upper section beam of the inner shear support (2-2-1) is provided with a second mounting hole (2-2-4) for the pitch adjustment mechanism (10) connected to the other end of the pitch adjustment mechanism (10).

7. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 1, characterized in that, The pitch adjustment mechanism (10) and the altitude adjustment mechanism (9) have the same structure; The pitch adjustment mechanism (10) includes a pitch adjustment cylinder (10-1), and the two ends of the pitch adjustment cylinder (10-1) are respectively provided with an upper pitch adjustment cylinder pin (10-3) and a lower pitch adjustment cylinder pin (10-2).

8. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 1, characterized in that, The first roller mechanism (5) and the second roller mechanism (7) have the same structure; The first roller mechanism (5) includes a first roller shaft (5-2), and a first roller (5-1) is rotatably disposed on the outer side of the first roller shaft (5-2).

9. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 8, characterized in that, It also includes a mechanical limiting device (6) for limiting the movement of the shear brace, the mechanical limiting device (6) being disposed on the slide of the first roller mechanism (5).

10. A shear brace with a twisting attitude adjustment function for a loading / unloading platform according to claim 9, characterized in that, The mechanical limiting device (6) includes a roller stop (6-1), which has an arc surface that matches the first roller (5-1). The sidewalls of the roller stop (6-1) are respectively provided with a positioning shaft (6-2) and a handle (6-3).

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