Anti-falling mechanism, scissor lifting device and lifting guiding anti-falling method

Abstract

The present application relates to vehicle lifting guide structure and anti-derailing protection technical field, especially a kind of anti-derailing mechanism, scissor lifting device and lifting guide anti-derailing method, including, outer cylinder, one end is equipped with opening;Telescopic rod, slidingly disposed in outer cylinder, and its extension end is connected with the roller for cooperating with track, the present application utilizes air as damping medium, by setting the multiple layer deformable plate body with staggered slit in accommodating cavity, labyrinth air flow channel is constructed, when carrying vehicle is impacted by wind load or personnel walking in high position operation, the impact of pressure air generates intense viscous friction and turbulent resistance in staggered flow channel, this damping force increases exponentially with the increase of impact speed, can quickly absorb and dissipate the shaking energy of upper platform, make compartment more stable and safe when high-altitude docking.

Description

Technical Field

[0001] This invention relates to the field of vehicle lifting guide structure and anti-derailment protection technology, and in particular to an anti-derailment mechanism, a scissor lift device and a lifting guide anti-derailment method. Background Technology

[0002] Currently, when operating medium and large aircraft carriers, a scissor lift mechanism is used to raise the cargo box to a high position to connect with the aircraft door. However, existing guiding structures mostly use a rigid fit between conventional rollers and guide rails, lacking an effective energy absorption mechanism. In a high-position operation, the cargo box is highly susceptible to lateral wind loads, airflow impacts, or the movement of personnel inside, causing it to sway. Traditional structures cannot quickly dissipate this swaying energy, resulting in insufficient stability and safety during high-position docking.

[0003] Meanwhile, the existing anti-derailment mechanisms have relatively simple functions. When subjected to violent shaking or instantaneous impact, the rollers may jump off the track, causing the structure to jam or the box to tilt. Existing hydraulic or physical buffer solutions generally have problems such as complex structure, high maintenance costs, and obvious rebound effect. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problem that the anti-detachment mechanism in the above or existing technology has poor impact resistance, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide an anti-detachment mechanism.

[0007] To address the technical problem of poor impact resistance in the aforementioned anti-detachment mechanism, the present invention provides the following technical solution: an anti-detachment mechanism, comprising: an outer cylinder with an opening at one end; a telescopic rod slidably disposed within the outer cylinder, with its extended end connected to a roller for engaging with a track; a reset member disposed between the outer cylinder and the telescopic rod, providing a reset force to press the roller against the track; and a damping assembly disposed within a cavity formed in the side wall of the outer cylinder, the damping assembly comprising at least two deformable plates with slits, with an air gap formed between adjacent deformable plates; wherein the slit openings on adjacent deformable plates are staggered.

[0008] As a preferred embodiment of the present invention for the anti-detachment mechanism, wherein: the inner wall of the outer cylinder is provided with an axially extending inner groove, a slider is slidably connected inside the inner groove, and the slider is fixedly connected to the telescopic rod for guiding the sliding of the telescopic rod.

[0009] As a preferred embodiment of the present invention for the anti-detachment mechanism, wherein: a sealing element is provided on the side of the telescopic rod near the damping component, and the outer periphery of the sealing element is in contact with the inner wall of the outer cylinder to ensure the sealing between the telescopic rod and the inner wall of the outer cylinder.

[0010] As a preferred embodiment of the present invention for the anti-detachment mechanism, the roller includes a limiting groove formed on the side near the outer cylinder, and also includes an abutment ring fixedly connected to the outer edge of the roller.

[0011] As a preferred embodiment of the present invention for the anti-detachment mechanism, wherein: an installation groove is provided on the side of the track near the roller, an abutment strip is fixedly connected to the inner wall of the installation groove, and a plurality of limiting beads are embedded in the side of the abutment strip near the abutment ring.

[0012] Another object of the present invention is to provide a scissor lift device, including the aforementioned anti-detachment mechanism, and further including a base frame fixedly mounted on a vehicle chassis; an upper platform for supporting the vehicle body; a scissor lift mechanism disposed between the base frame and the upper platform; a multi-section telescopic cylinder serving as a power source to drive the scissor lift mechanism to unfold or close; and a guide structure including a rail disposed on the base frame or the upper platform, and an anti-detachment mechanism cooperating within the rail; wherein the anti-detachment mechanism, through its rollers cooperating with the rail, is used to limit the lateral displacement of the upper platform during the lifting process, and utilizes the damping force generated within it to absorb the swaying energy during high-level operations.

[0013] As a preferred embodiment of the scissor lift device of the present invention, the scissor lift mechanism includes at least two sets of scissor arms that are spaced apart and cross-hinged along the vehicle width direction. Each set of scissor arms includes a first scissor arm and a second scissor arm that are cross-hinged with each other. One end of the first scissor arm is hinged to the base frame, and the other end is slidably connected to the upper platform through a hinge seat. One end of the second scissor arm is hinged to the upper platform, and the other end is slidably connected to the base frame through a hinge seat. A transverse connecting beam is connected between the corresponding hinge positions of the first scissor arm and the second scissor arm, so that the first scissor arm and the second scissor arm synchronously support the transverse sides of the upper platform during the unfolding and closing process.

[0014] Another object of the present invention is to provide a lifting guide anti-derailment method for a scissor lift device, applicable to the above-mentioned scissor lift device, comprising, During the lifting process, multiple sets of scissor arms are deployed synchronously along the width of the vehicle to form synchronous lifting supports on both sides of the upper platform. During the lifting and / or high-positioning of the upper platform, the anti-detachment mechanism is kept in a guiding engagement with the track to limit the lateral displacement of the upper platform; When the upper platform exhibits a lateral offset tendency, the lateral offset is converted into a retraction displacement of the telescopic rod in the anti-detachment mechanism, and the retraction displacement is damped by the damping component.

[0015] As a preferred embodiment of the lifting guidance and anti-detachment method of the scissor lift device of the present invention, the damping constraint includes compressing the air inside the outer cylinder when the telescopic rod retracts, and causing the compressed air to flow sequentially through at least two slits staggered on the deformable plates, so as to weaken the lateral displacement trend through air flow resistance.

[0016] As a preferred embodiment of the lifting guidance and anti-detachment method of the scissor lift device of the present invention, the synchronous lifting support includes at least two sets of scissor arms arranged laterally to support the lateral sides of the upper platform respectively, and to keep each set of scissor arms synchronously deployed or synchronously closed under the action of the same power source.

[0017] The beneficial effects of the anti-detachment mechanism and scissor lift device of the present invention are as follows: The present invention uses air as a damping medium. By setting up a multi-layer deformable plate with staggered slits in the accommodating cavity, a labyrinthine air flow channel is constructed. When the carrier is subjected to wind load or impact from personnel walking during high-level operation, the compressed air generates severe viscous friction and turbulent resistance in the staggered flow channel. This damping force increases exponentially with the increase of impact speed, which can quickly absorb and dissipate the swaying energy of the upper platform, making the body more stable and safer when docking at high altitude.

[0018] This invention integrates anti-detachment, guidance, and buffering functions into one unit. Compared with traditional hydraulic dampers, this invention has a more compact structure, eliminates the risk of oil leakage, and is not sensitive to ambient temperature. The multi-section telescopic cylinder design achieves large-stroke lifting while meeting the requirements of low chassis installation space. Combined with the symmetrical scissor structure, it ensures uniform overall load distribution. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a side view of the anti-detachment mechanism.

[0021] Figure 2 This is a schematic diagram of the receiving cavity for the anti-detachment mechanism.

[0022] Figure 3 This is a schematic diagram of the contact strip of the anti-detachment mechanism.

[0023] Figure 4 This is a schematic diagram of the cross-section of the outer cylinder of the anti-detachment mechanism.

[0024] Figure 5 This is a schematic diagram of the scissor lift device.

[0025] Figure 6 This is a schematic diagram of the outer cylinder of a scissor lift device. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1, referring to Figures 1 to 4 This is the first embodiment of the present invention, which provides an anti-detachment mechanism, including an outer cylinder 100 with an opening at one end; a telescopic rod 101 slidably disposed inside the outer cylinder 100, and its extended end connected to a roller 103 for cooperating with a track 102. The outer cylinder 100 is preferably cast from high-strength alloy steel to ensure that it is not prone to plastic deformation when subjected to high-frequency vibration and extreme lateral impact for a long time. Its outer wall can be firmly anchored to the lifting equipment by flange, bolt or welding, serving as the basic support for the entire anti-detachment mechanism. The outer rolling surface of the roller 103 can be covered with a layer of wear-resistant and elastic polyurethane or nitrile rubber, so that when it makes high-frequency rolling contact with the track 102, it can significantly reduce the noise caused by metal friction interference and provide basic mechanical buffering.

[0030] A reset member 104 is disposed between the outer cylinder 100 and the telescopic rod 101, providing a reset force to keep the roller 103 pressed against the track 102. The reset member 104 is an elastic component capable of storing elastic potential energy when the telescopic rod 101 retracts relative to the outer cylinder 100, and pushing the telescopic rod 101 toward the track 102 after the external force acting on the roller 103 weakens or disappears. The reset member 104 can be a compression spring, or an elastic sleeve, elastic block, disc spring, or other elastic structure capable of applying a reset force to the telescopic rod 101. In this embodiment, the reset member 104 is preferably a compression spring sleeved on or abutting against the telescopic rod 101, with one end acting on the outer cylinder 100 and the other end acting on the telescopic rod 101, so that the roller 103 remains in contact with the track 102 during normal lifting and lowering. A damping assembly 200 is disposed within a receiving cavity 105 formed in the side wall of the outer cylinder 100. The damping assembly 200 includes at least two deformable plates 202 with slits 201, and an air gap is formed between adjacent deformable plates 202. A deformable plate 202 is a plate-shaped component that can undergo elastic deformation under the action of air pressure within the receiving cavity 105 and at least partially recover its original shape after the air pressure decreases. The deformable plate 202 can be made of rubber, silicone, polyurethane elastic material, or other materials with elastic deformation capabilities, or it can be a composite plate composed of a flexible matrix and a reinforcing layer. In this embodiment, the deformable plate 202 is preferably made of rubber.

[0031] The periphery of the deformable plate 202 is connected to the inner wall of the accommodating cavity 105, dividing the accommodating cavity 105 into multiple interconnected buffer zones along the airflow direction. The deformable plate 202 can absorb some of the pressure impact through its own elastic deformation, and also restricts air from directly escaping from the periphery of the plate, causing the pressurized air to mainly flow to adjacent buffer zones through the slits 201. The slits 201 on adjacent deformable plates 202 are staggered, causing the airflow direction to change as it passes through different deformable plates 202, thereby increasing the airflow resistance. The opening positions of the slits 201 on the two adjacent deformable plates 202 are staggered. When the roller 103 is impacted and moves towards the reset member 104, the deformable plates 202 and the air gap generate damping force by slowing down the air discharge speed, thereby reducing the retraction speed of the telescopic rod 101. The accommodating cavity 105 actually constitutes a relatively sealed micro pneumatic buffer chamber. The deformable plates 202 not only have the function of separating the air chamber, but also, relying on their own elastic deformation characteristics, their outer edges are tightly fitted and squeezed with the inner wall of the accommodating cavity 105, effectively preventing the air in the cavity from leaking out from the edge gaps. The air gap layer between the two deformable plates 202 provides the necessary buffer volume for the brief residence and expansion backflow of the compressed air. The opening positions of the slits 201 on the two adjacent deformable plates 202 are staggered.

[0032] Specifically, when the roller 103 is subjected to a large instantaneous destructive impact force, causing the telescopic rod 101 to retract rapidly, the gas volume in the accommodating cavity 105 is suddenly compressed, and the air pressure increases instantaneously. At this time, when the high-pressure air passes through the misaligned slit 201, it will not only generate a large amount of viscous frictional resistance due to the narrow flow channel, but also form a large amount of turbulence and local eddies inside the air gap due to the constant abrupt change in the fluid direction. This reaction force, i.e., the air damping force, generated by the aerodynamic drag effect, will increase nonlinearly with the increase of the impact speed. Thus, when subjected to severe working conditions, a large amount of the huge impact kinetic energy is converted into the heat energy of the air and dissipated. While protecting the structural components from rigid damage, it also smoothly prevents the roller 103 from derailing.

[0033] In summary, the anti-derailment mechanism in this embodiment utilizes the air naturally present in the environment as a damping medium, combined with a simple physical flow channel misalignment design, to achieve a maintenance-free, long-life, and rapidly responsive intelligent anti-derailment solution.

[0034] Example 2, refer to Figures 1-4 This is the second embodiment of the present invention. Unlike the previous embodiment, the outer cylinder 100 and the damping assembly 200 are different. The inner wall of the outer cylinder 100 has an axially extending inner groove 203. A slider 204 is slidably connected inside the inner groove 203. The slider 204 is fixedly connected to the telescopic rod 101 and is used to guide the sliding of the telescopic rod 101. The rigid guide structure of the combination of the inner groove 203 and the slider 204 enhances the overall torsional resistance of the telescopic rod 101. In actual working conditions, when the roller 103 is often subjected to not just a simple axial radial force, but a tangential off-center load with a certain angle, the cooperation between the slider 204 and the side wall of the inner groove 203 can effectively absorb this harmful lateral torque, preventing the telescopic rod 101 from getting stuck, jammed, or experiencing abnormal wear on one side inside the outer cylinder 100, thus ensuring the smoothness of vibration damping operation throughout its entire life cycle.

[0035] A sealing element 205 is provided on the side of the telescopic rod 101 near the damping assembly 200. The outer periphery of the sealing element 205 is in contact with the inner wall of the outer cylinder 100 to ensure the sealing between the telescopic rod 101 and the inner wall of the outer cylinder 100.

[0036] The seal 205 refers to a sealing structure disposed between the telescopic rod 101 and the outer cylinder 100, capable of moving with the telescopic rod 101 or remaining positioned relative to the telescopic rod 101, to restrict air leakage through the mating gap between the telescopic rod 101 and the outer cylinder 100. The seal 205 may be a sealing ring, a sealing sleeve, an annular sealing member with a sealing lip, or other components capable of forming a sliding seal with the inner wall of the outer cylinder 100.

[0037] In this embodiment, the sealing element 205 is preferably a sealing ring surrounding the telescopic rod 101. The sealing ring can be made of polytetrafluoroethylene, nitrile rubber, or other materials that combine wear resistance and sealing properties. The outer periphery of the sealing element 205 maintains a sliding fit with the inner wall of the outer cylinder 100, so that the compressed air when the telescopic rod 101 retracts is not easily leaked directly through the gap between them, but mainly flows through the slit 201 in the damping assembly 200, thereby maintaining the air damping effect of the damping assembly 200.

[0038] The seal 205 is preferably made of wear-resistant polytetrafluoroethylene or high-density nitrile rubber with self-lubricating properties. Its core function is to build and maintain a controlled, relatively sealed gas chamber environment. When the telescopic rod 101 is compressed rapidly, the seal 205 forces all the gas attempting to escape to drain from the preset slit 201 labyrinth channel, completely cutting off the path of disorderly loss of pneumatic energy along the cylinder wall gap, thereby ensuring the stable triggering of the damping mechanism.

[0039] The roller 103 includes a limiting groove 103a opened on the side near the outer cylinder 100, and an abutment ring 103b fixedly connected to the outer edge of the roller 103. The outer diameter of the abutment ring 103b is specifically designed to be larger than the diameter of the conventional rolling surface of the roller 103. Structurally, it is equivalent to adding rigid protective side wings on both sides of the roller 103. The track 102 has an installation groove 102a opened on the side near the roller 103. An abutment strip 102b is fixedly connected to the inner wall of the installation groove 102a. The abutment strip 102b is made of rubber. Multiple limiting beads 102c are embedded in the side of the abutment strip 102b near the abutment ring 103b. The cross-section of the track 102 is "I" shaped, and the roller 103 is set in the inner cavity of the track 102.

[0040] More often, the limiting ball 102c is usually made of high-hardness, low-friction bearing steel ball or alumina ceramic ball. Its main body is embedded in the base of the abutment bar 102b, with only the hemispherical part protruding outward in a dot matrix pattern. During normal and stable lifting of the equipment, the abutment ring 103b and the limiting ball 102c maintain a very small non-contact gap. However, once the lifting equipment is in danger of a large lateral tilt due to extremely severe gusts of wind, the abutment ring 103b will be forced to abut against the array of limiting balls 102c. At this time, since the limiting ball 102c can roll on its own, it cleverly transforms the traditional sliding hard friction into extremely smooth rolling friction. If the deflection force is large, the limiting ball 102c squeezes the abutment bar 102b and retracts into the abutment bar 102b. The abutment ring 103b directly abuts against the edge of the track 102, increasing the abutment force.

[0041] The rest of the structure is the same as in Example 1.

[0042] In summary, this embodiment, by adding a slider 204 anti-torsion guide, a high airtightness ring, and a ceramic anti-collision bead array auxiliary support system to the original pneumatic damping, provides a heavy-duty anti-derailment guide system with multiple safety redundancy mechanisms.

[0043] Example 3, referring to Figures 1-6 In a third embodiment of the present invention, a scissor lift device is also provided, including an anti-detachment mechanism, a base frame 300 fixedly mounted on the chassis of a vehicle, the base frame 300 serving as the core load-bearing reference surface for the vehicle lifting operation and requiring rigid connection to the main beam of the vehicle chassis via high-strength heavy-duty bolts; an upper platform 400 for supporting the vehicle body; and a scissor lift mechanism 500 disposed between the base frame 300 and the upper platform 400.

[0044] Furthermore, the scissor lift mechanism 500 is composed of multiple thickened, high-strength rectangular seamless steel pipes that are interlocked by a large central pin. Its unique X-shaped cross mechanical structure can geometrically amplify the vertical lifting stroke within the limited chassis plane space.

[0045] The multi-section telescopic cylinder 501 serves as a power source to drive the scissor lift mechanism 500 to unfold or close; the guide structure 600 includes a rail 102 mounted on the base frame 300 or the upper platform 400, and an anti-detachment mechanism cooperating within the rail 102; wherein, the anti-detachment mechanism cooperates with the rail 102 through its roller 103 to limit the lateral displacement of the upper platform 400 during the lifting process, and uses the damping force generated inside it to absorb the swaying energy during high-level operations.

[0046] In actual civil aviation ground operations, when a carrier vehicle needs to dock with a wide-body medium-to-large passenger aircraft at high altitude, its lifting platform often needs to be raised to a dangerous high-altitude area of ​​nearly 6 meters or even higher above the ground. Under these extreme conditions, any tiny gaps in the hinge points of the scissor mechanism, or slight external interference such as a sudden strong crosswind gust of force 6 or above over the tarmac, or two catering staff moving quickly inside the compartment to move the food cart, will be amplified at the top according to the lever principle, resulting in swaying. At this time, the anti-detachment mechanism in the track 102 plays a crucial role. Whenever the upper platform 400 deviates or tends to overturn, the roller 103 squeezes inward, and the air damping component 200 in the misalignment slit 201 responds immediately. The scissor lifting mechanism 500 is a multi-set scissor arm structure symmetrically arranged on the left and right. This mirror symmetrical arrangement design can ensure that the upper platform 400 is subjected to uniform force throughout the entire process of lifting and lowering from the physical source, preventing the compartment from twisting and tilting accidents caused by excessive force on one side or inconsistent structural deformation.

[0047] The scissor lift mechanism 500 includes at least two sets of scissor arms spaced apart along the vehicle width direction. Each set of scissor arms includes a first scissor arm and a second scissor arm that are hinged to each other. At least one set of scissor arms is located on one lateral side of the upper platform 400, and at least another set of scissor arms is located on the other lateral side of the upper platform 400. One end of the first scissor arm is hinged to the base frame 300, and the other end is slidably connected to the upper platform 400 via a hinge seat. One end of the second scissor arm is hinged to the upper platform 400, and the other end is slidably connected to the base frame 300 via a hinge seat. A transverse connecting beam connects the corresponding hinged positions of two adjacent sets of scissor arms along the vehicle width direction, so that each set of scissor arms is synchronously extended or synchronously closed under the drive of the multi-section telescopic cylinder 501.

[0048] The scissor lift mechanism 500 consists of multiple scissor arms arranged symmetrically on both sides. The multi-section telescopic cylinder 501 includes four telescopic cylinder sections, used to achieve large-stroke lifting within a limited space. After being lifted to the working height, the multi-section telescopic cylinder 501, together with the scissor lift mechanism 500 and the anti-detachment mechanism, forms a high-rigidity load-bearing state to improve the stability of the vehicle during high-level docking operations.

[0049] Furthermore, because the overall height of the aircraft carrier itself must strictly meet the height restrictions for passage on airport aprons and under bridges, traditional single-section long-rod hydraulic cylinders are simply too long to fit in such a low and cramped chassis space. The multi-section telescopic hydraulic cylinder 501 used in this invention is extremely compact when fully retracted. When the hydraulic pump station provides high-pressure hydraulic oil, it can extend outwards in stages like a telescope sleeve, resolving the engineering contradiction between the extremely limited initial installation space of the chassis and the extremely large lifting stroke required for docking with the high-level cabin door.

[0050] Once the floor of the cargo box is confirmed to be at the designated horizontal level with the aircraft door, the two-way hydraulic locking valve of the hydraulic system is instantly activated to maintain pressure. The hydraulic oil inside the multi-section cylinder is completely locked, instantly transforming it from a moving part into an incompressible, rigid support column. At this time, the vertical strong support in the center of the cylinder, the closed-loop frame constraint formed around the scissor arm, and the flexible anti-lateral damping provided in real time by the anti-derailment mechanism within track 102, together form a stable triangular anti-interference mechanical model in three-dimensional space, ensuring the overturning resistance of the entire heavy-duty vehicle and the safety of high-altitude ground operations.

[0051] The rest of the structure is the same as in Example 2.

[0052] In summary, this embodiment successfully applied the innovative anti-detachment component to a specific and highly demanding real-world scenario involving heavy-duty special vehicles in civil aviation, solving the long-standing problem of poor stability during high-altitude operations in civil aviation ground support.

[0053] Example 4: This example also provides a lifting guide anti-detachment method for a scissor lift device, applicable to the above-mentioned scissor lift device, including, During the lifting process, multiple sets of scissor arms are simultaneously deployed along the width of the vehicle to form synchronous lifting supports on both sides of the upper platform 400. During the lifting and / or high-positioning of the upper platform 400, the anti-detachment mechanism is kept in a guiding engagement with the track 102 to limit the lateral displacement of the upper platform 400. When the upper platform 400 exhibits a lateral offset tendency, the lateral offset is converted into the retraction displacement of the telescopic rod 101 in the anti-detachment mechanism, and the retraction displacement is damped by the damping component 200.

[0054] In the initial lifting phase, the multi-section telescopic cylinder 501 inputs lifting power to the scissor lift mechanism 500, causing the scissor arms located on both lateral sides of the upper platform 400 to deploy synchronously. Since each scissor arm acts on both lateral sides of the upper platform 400, the upper platform 400 is not lifted and lowered solely by a single-sided scissor structure, but rather receives lifting support simultaneously on both lateral sides. This reduces the tendency for the platform to tilt laterally during the movement of the upper platform 400 from a lower to a higher position, which could be caused by unilateral force lag, accumulation of hinge gaps on one side, or load bias.

[0055] During the aforementioned synchronous lifting process, the roller 103 in the anti-derailment mechanism works in conjunction with the track 102. The track 102 restricts the direction of movement of the roller 103, which then moves relative to the track 102 as the upper platform 400 rises and falls. Therefore, the anti-derailment mechanism does not only function after a derailment risk occurs, but continuously participates in lateral guidance throughout the entire lifting stroke of the upper platform 400, constraining the vertical lifting path of the upper platform 400 within a preset range.

[0056] When the upper platform 400 is in a high-positioned state, the scissor lift mechanism 500 is in the deployed state. External wind loads, personnel movement, load transfer within the carriage, or minor collisions during docking may cause the upper platform 400 to shift laterally. At this time, the track 102 transmits this lateral shift tendency to the roller 103, which pushes the telescopic rod 101 to retract relative to the outer cylinder 100, thereby converting the lateral shift tendency of the upper platform 400 into the axial retraction displacement of the telescopic rod 101.

[0057] Furthermore, when the telescopic rod 101 retracts, the air inside the outer cylinder 100 is compressed. The compressed air enters the area where the damping assembly 200 is located and flows sequentially through at least two staggered slits 201 on the deformable plates 202. Because the opening positions of adjacent slits 201 are staggered, the compressed air cannot be quickly discharged along a straight path, but needs to change its flow direction and overcome flow resistance in the staggered flow channel. Through this airflow resistance, the damping assembly 200 forms a damping constraint on the rapid retraction of the telescopic rod 101, thereby weakening the lateral offset tendency of the upper platform 400.

[0058] When the external lateral force weakens or disappears, the telescopic rod 101 resets towards the track 102 under the action of the reset member 104, so that the roller 103 resumes its guiding engagement with the track 102. Thus, the anti-derailment mechanism can provide damping and energy dissipation when lateral deviation occurs, and restore the guiding position after the lateral deviation weakens, thereby maintaining the guiding stability of the upper platform 400 during the lifting process and high-level operation.

[0059] The damping constraint includes compressing the air inside the outer cylinder 100 when the telescopic rod 101 retracts, and allowing the compressed air to flow through at least two layers of staggered slits 201 to weaken the lateral displacement tendency through airflow resistance. Compared with resisting lateral displacement solely through rigid limiting, this embodiment further introduces an air damping process after the lateral displacement is converted into retraction displacement, so that the lateral impact energy is gradually consumed inside the anti-detachment mechanism, reducing the risk of rigid impact or instantaneous detachment between the roller 103 and the track 102.

[0060] The synchronous lifting support includes at least two sets of scissor arms arranged laterally at intervals, supporting the lateral sides of the upper platform 400 respectively, and ensuring that each set of scissor arms maintains synchronous deployment or synchronous closure under the action of the same power source. The same power source can be the same multi-section telescopic cylinder 501, or multiple actuators synchronously controlled by the same hydraulic circuit, as long as it can ensure that each set of scissor arms maintains synchronous movement during lifting and lowering.

[0061] In summary, this embodiment achieves improved lateral stability and anti-detachment reliability of the scissor lift device during high-level operations by coordinating multiple sets of scissor arms for synchronous lifting support and the anti-detachment mechanism for damping and guiding anti-detachment.

[0062] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0063] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0064] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An anti-detachment mechanism, characterized in that: include, The outer cylinder (100) has an opening at one end; The telescopic rod (101) is slidably disposed inside the outer cylinder (100), and its extended end is connected to a roller (103) for cooperating with the track (102). A reset component (104) is disposed between the outer cylinder (100) and the telescopic rod (101) to provide a reset force to make the roller (103) stick to the track (102). A damping assembly (200) is disposed in a receiving cavity (105) opened in the side wall of the outer cylinder (100). The damping assembly (200) includes at least two deformable plates (202) with slits (201), and an air gap is formed between two adjacent deformable plates (202). The slits (201) on two adjacent deformable plates (202) are staggered.

2. The anti-detachment mechanism as described in claim 1, characterized in that: The inner wall of the outer cylinder (100) is provided with an axially extending inner groove (203), and a slider (204) is slidably connected inside the inner groove (203). The slider (204) is fixedly connected to the telescopic rod (101) and is used to guide the sliding of the telescopic rod (101).

3. The anti-detachment mechanism as described in claim 1, characterized in that: The telescopic rod (101) is provided with a sealing element (205) on the side near the damping assembly (200). The outer periphery of the sealing element (205) is in contact with the inner wall of the outer cylinder (100) to ensure the sealing between the telescopic rod (101) and the inner wall of the outer cylinder (100).

4. The anti-detachment mechanism as described in any one of claims 1 to 3, characterized in that: The roller (103) includes a limiting groove (103a) opened on the side near the outer cylinder (100), and also includes an abutment ring (103b) fixedly connected to the outer edge of the roller (103).

5. The anti-detachment mechanism as described in claim 4, characterized in that: The track (102) has an installation groove (102a) on the side near the roller (103). An abutment strip (102b) is fixedly connected to the inner wall of the installation groove (102a). Multiple limit beads (102c) are embedded in the side of the abutment strip (102b) near the abutment ring (103b).

6. A scissor lift device, comprising the anti-detachment mechanism as described in any one of claims 1 to 5, characterized in that: It also includes, The underframe (300) is fixedly mounted on the chassis of the carrier vehicle; The upper platform (400) is used to support the carriage body; A scissor lift mechanism (500) is disposed between the base frame (300) and the upper platform (400); A multi-section telescopic cylinder (501) serves as a power source to drive the scissor lift mechanism (500) to unfold or close. The guide structure (600) includes a track (102) disposed on the base frame (300) or the upper platform (400), and an anti-detachment mechanism cooperating in the track (102); The anti-detachment mechanism, through its roller (103) cooperating with the track (102), is used to limit the lateral displacement of the upper platform (400) during the lifting process, and to absorb the swaying energy during high-level operations by utilizing the damping force generated inside it.

7. The scissor lift device as described in claim 6, characterized in that: The scissor lift mechanism (500) includes at least two sets of scissor arms that are spaced apart and cross-hinged along the vehicle width direction, and each set of scissor arms includes a first scissor arm and a second scissor arm that are cross-hinged with each other. One end of the first scissor arm is hinged to the base frame (300), and the other end is slidably connected to the upper platform (400) through a hinge seat; one end of the second scissor arm is hinged to the upper platform (400), and the other end is slidably connected to the base frame (300) through a hinge seat; A transverse connecting beam is connected between the corresponding hinge positions of the first scissor arm and the second scissor arm, so that the first scissor arm and the second scissor arm synchronously support the transverse sides of the upper platform (400) during the opening and closing process.

8. A lifting guide and anti-detachment method for a scissor lift device, applicable to the scissor lift device as described in claim 6 or 7, characterized in that: include, During the lifting process, multiple sets of scissor arms are simultaneously deployed along the width of the vehicle to form synchronous lifting supports on both sides of the upper platform (400). During the lifting and / or high-positioning of the upper platform (400), the anti-detachment mechanism is kept in a guiding engagement with the track (102) to limit the lateral displacement of the upper platform (400); When the upper platform (400) has a lateral offset tendency, the lateral offset is converted into the retraction displacement of the telescopic rod (101) in the anti-detachment mechanism, and the retraction displacement is damped by the damping component (200).

9. The lifting guide anti-detachment method for the scissor lift device as described in claim 8, characterized in that: The damping constraint includes compressing the air inside the outer cylinder (100) when the telescopic rod (101) retracts, and causing the compressed air to flow sequentially through at least two slits (201) staggered on the deformable plates (202) to weaken the lateral offset tendency through airflow resistance.

10. The lifting guide anti-detachment method for the scissor lift device as described in claim 8 or 9, characterized in that: The synchronous lifting support includes at least two sets of scissor arms arranged laterally to support the lateral sides of the upper platform (400), and to keep the scissor arms synchronously deployed or synchronously closed under the action of the same power source.

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