A large tonnage freight elevator support assembly

Abstract

The application belongs to the technical field of elevator load-carrying and discloses a large-tonnage load-carrying elevator supporting assembly, which comprises a lifting platform, a plurality of mounting sleeves are fixedly connected to the two sides of the lifting platform, and a lifting machine is connected to the mounting sleeves, and an upper pressing plate is slidably connected to the middle part of the lifting platform; through the cooperation of the upper pressing plate, the pressing rod, the transverse plug rod, the push block and the inclined supporting plate and other structures, the automatic and continuous adaptation of the supporting angle to the load size is facilitated; when the goods are pressed on the upper pressing plate, the upper pressing plate moves downward to drive the pressing rod to extrude the hydraulic oil in the hydraulic cylinder, the transverse plug rod is pushed to move outward, the push block synchronously pushes the lower end of the inclined supporting plate to deflect outward, the included angle between the inclined supporting plate and the moving plate is automatically increased from the initial angle to a direction more close to vertical, the heavier the goods, the larger the included angle and the stronger the vertical supporting component, the instantaneous accurate transmission of displacement is realized, the effective supporting strength of the inclined supporting plate is improved, and the possibility of deformation failure is reduced.

Description

Technical Field

[0001] This invention belongs to the field of elevator freight technology, specifically a support component for a large-tonnage freight elevator. Background Technology

[0002] The support components of a freight elevator refer to the complete load-bearing structural system that supports the elevator car and goods. It typically includes components such as the car frame, car bottom bracket, diagonal braces, and diagonal tie rods. Freight elevators are designed specifically for transporting goods, especially large-tonnage freight elevators that need to withstand static and dynamic loads of several tons or even tens of tons. The support components must have extremely high strength and rigidity. When forklifts and other handling equipment enter and exit the car, concentrated loads and off-center impacts are generated. The support components must be able to resist the deformation of the car bottom caused by uneven loads.

[0003] The prior art document, CN116022629B, discloses a two-guide-rail, double-beam structure freight elevator, belonging to the field of freight elevator technology. It includes a car frame and a car installed within the car frame, the car frame driving the car's movement. The car includes a car floor located at the bottom of the car. The bottom of the car floor is connected to a support beam assembly via several sets of diagonal bracing assemblies arranged sequentially from left to right. By setting a lifting beam assembly and a support beam assembly at the bottom of the car floor, the lifting beam assembly supports the middle position of the bottom of the car floor, while the support beam assembly supports the front and rear positions of the bottom of the car floor via the diagonal bracing assemblies. The two sides of the car floor are fixed to columns via diagonal tie rods, thus providing support and fixation in three dimensions: front-back, left-right, and top-bottom. This gives the car floor a strong load-bearing capacity and prevents deformation of the car floor during freight use. Although the aforementioned patent achieves strong load-bearing capacity by setting up lifting beam components and supporting beam components, and using diagonal bracing components to support the front and rear ends of the car bottom, and connecting the uprights with diagonal tie rods to achieve support and fixation of the car bottom in three dimensions (front-back, left-right, and up-down), it is difficult to solve the problem of effective support of the supporting components. The tilt angle of each diagonal bracing component is fixed after installation and cannot be dynamically adjusted according to the actual weight of the goods or load distribution. When the load changes, the vertical support component of the diagonal bracing is constant. The support efficiency is insufficient under light loads and the support stiffness is insufficient under heavy loads, making it difficult to adapt to the support requirements of goods of different tonnages. Summary of the Invention

[0004] The purpose of this invention is to provide a support component for a large-tonnage freight elevator with adaptive load adjustment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a support assembly for a large-tonnage freight elevator, comprising a lifting platform, wherein several mounting sleeves are fixedly connected to both sides of the lifting platform, and a lifting machine is externally connected to each mounting sleeve; an upper pressure plate is slidably connected to the middle of the lifting platform; and further comprising: An angle self-adapting mechanism is located on the lifting platform, and at least two sets of the angle self-adapting mechanism are provided. An elastic setting mechanism, wherein the elastic setting mechanism is connected to an angle self-adapting mechanism; The angle self-adaptive mechanism includes a lower pressure plate slidably connected to the lower side of the lifting platform. Several fixing blocks are fixed to the bottom of the lower pressure plate, and a diagonal brace is rotatably connected to the middle of the fixing blocks via a rotating shaft.

[0006] Preferably, the angle self-adaptation mechanism further includes a plurality of first disc springs fixed to the inner surface of the bottom of the lifting platform, and a movable plate is fixed to the top of each of the first disc springs on both sides.

[0007] Preferably, each of the two movable plates has several sliding frames fixedly connected to its top, and the inner walls of the movable plates are slidably connected to sliders. The lower sides of the inclined support plates are rotatably connected to the sliders via rotating shafts.

[0008] Preferably, a hydraulic cylinder is fixedly connected to the inner side of the pair of movable plates, and a diversion pipe is fixedly connected to both sides of the bottom of the hydraulic cylinder, and the inner cavity of the hydraulic cylinder is filled with hydraulic oil.

[0009] Preferably, a pressure rod is fixedly connected to the bottom of the upper pressure plate, and the outer wall of the pressure rod slides through the lower pressure plate. The end of the pressure rod is slidably connected to the inner cavity of the hydraulic cylinder through a pressure plate.

[0010] Preferably, the inner cavity of each diverter tube is slidably connected with a transverse plug rod, and the outer wall of the transverse plug rod is fixed with several push blocks.

[0011] Preferably, the sidewalls of the plurality of push blocks abut against the outer wall of the bracing plate, and the transverse plug rods movably pass through the inner side of the bracing plate.

[0012] Preferably, the elastic setting mechanism includes several sets of sliding grooves equidistantly opened on the top of the lower pressure plate, and a U-shaped slide is slidably connected in each set of sliding grooves.

[0013] Preferably, the top of each U-shaped carriage is secured with a second disc spring via a locking block, and the top of each second disc spring abuts against the bottom of the upper pressure plate.

[0014] Preferably, both sides of the lifting platform are fixedly connected to baffles, and the bottom of the baffles abuts against the upper pressure plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up an upper pressure plate, pressure rod, transverse plug rod, push block and diagonal brace, the present invention facilitates the automatic and continuous adaptation of the support angle with the load size. When the goods are pressed on the upper pressure plate, the upper pressure plate moves down and drives the pressure rod to squeeze the hydraulic oil in the hydraulic cylinder, pushing the transverse plug rod to move outward. The push block pushes the lower end of the diagonal brace to deflect outward at the same time, so that the angle between the diagonal brace and the moving plate automatically increases from the initial angle to a direction that is closer to vertical. The heavier the goods, the larger the angle and the stronger the vertical support component, realizing the instantaneous and accurate transmission of displacement. This solves the problem that the traditional fixed angle diagonal brace needs to be stopped for adjustment and cannot adapt to different load conditions, thus improving the effective support strength of the diagonal brace and reducing the possibility of deformation failure.

[0016] (2) By setting up a first disc spring, a second disc spring and a moving plate, the present invention facilitates the coordinated bearing of two-stage buffer and load diversion. When the upper pressure plate moves down, it first compresses the second disc spring to form the first-stage elastic buffer. At the same time, the lower end of the inclined support plate moves outward and drives the moving plate to compress the first disc spring through the slider and the sliding frame to form the second-stage elastic buffer. The compression deformation of the first disc spring also compensates for the longitudinal displacement generated during the deflection of the inclined support plate, ensuring that the deflection movement is smooth and without jamming. The two-stage disc springs form a load diversion path between the upper pressure plate and the inclined support plate, jointly bearing the weight of the goods, effectively attenuating the impact load when the forklift enters and exits the car, and avoiding the loosening and fatigue damage caused by the impact force acting directly on the connection of the inclined support.

[0017] (3) By setting up a U-shaped carriage, a chute, a locking block and a second disc spring, the present invention facilitates the on-demand setting of the initial support pressure threshold. The operator can slide the U-shaped carriage along the chute opened on the top of the lower pressure plate according to the expected weight range of the goods, and send the selected number and specifications of the second disc springs between the upper and lower pressure plates. The second disc springs are then fixed to the top of the U-shaped carriage by the locking block, realizing the quick disassembly and replacement of the second disc springs. This allows the operator to flexibly set the initial pressure threshold of the upper pressure plate according to the actual working conditions. When the load is light, fewer or smaller stiffness disc springs are used to ensure sensitivity. When the load is heavy, more or larger stiffness disc springs are used to prevent the upper pressure plate from pressing directly to the bottom and losing its adjustment ability. This effectively expands the load adaptability range and control flexibility of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the structural fit between the lifting platform and the upper pressure plate of the present invention; Figure 3 This is a schematic diagram of the side cross-section structure of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a schematic diagram showing the structural fit between the inclined brace plate and the push block of the present invention; Figure 6 This is a schematic diagram showing the structural fit between the upper pressure plate and the pressure rod of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle; Figure 8 This is a schematic diagram showing the structural fit between the pressure plate and the U-shaped carriage of the present invention.

[0019] In the picture: 100. Lifting platform; 200. Upper pressure plate; 300. Mounting sleeve; 400. Angle self-adapting mechanism; 410. Lower pressure plate; 420. Fixing block; 430. Diagonal brace plate; 440. Push block; 450. Horizontal stop rod; 460. Hydraulic cylinder; 470. First disc spring; 480. Pressure rod; 490. Diverter pipe; 4100. Moving plate; 4110. Slide frame; 4120. Slider; 4130. Rotating shaft; 500. Elastic setting mechanism; 510. U-shaped slide; 520. Second disc spring; 530. Stop bar; 540. Locking block; 550. Slide groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, the present invention provides a support assembly for a large-tonnage freight elevator, including a lifting platform 100, with several mounting sleeves 300 fixedly connected to both sides of the lifting platform 100, and an external lifting machine connected to each mounting sleeve 300. An upper pressure plate 200 is slidably connected to the middle of the lifting platform 100, and the assembly also includes: Angle self-adapting mechanism 400 is located on the lifting platform 100, and at least two sets of angle self-adapting mechanism 400 are provided. Elastic setting mechanism 500, which is connected to angle self-adapting mechanism 400; The angle self-adaptation mechanism 400 includes a lower pressure plate 410 slidably connected to the lower side of the lifting platform 100. Several fixing blocks 420 are fixedly connected to the bottom of the lower pressure plate 410. A diagonal brace plate 430 is rotatably connected to the middle of the fixing block 420 through a rotating shaft 4130.

[0022] The above scheme is adopted: the lifting platform 100 is connected to an external lifting machine through several mounting sleeves 300 fixed on both sides to achieve overall lifting movement. An upper pressure plate 200 is slidably connected in the middle of the lifting platform 100 to directly bear the load of the goods. An angle self-adapting mechanism 400 is located on the lifting platform 100 and at least two sets are provided. A spring setting mechanism 500 is connected to the angle self-adapting mechanism 400. The angle self-adapting mechanism 400 includes a lower pressure plate 410 slidably connected to the lower side of the lifting platform 100. Several mounting sleeves 300 are fixedly connected to the bottom of the lower pressure plate 410. The fixed block 420 has a diagonal brace 430 rotatably connected to its middle part via a pivot 4130. When the upper pressure plate 200 slides downward under the weight of the cargo, the load is transmitted to the angle self-adaptation mechanism 400 through the elastic setting mechanism 500, which drives the diagonal brace 430 to deflect outward around the pivot 4130 in the middle of the fixed block 420 to increase the support angle. The elastic setting mechanism 500 is also used to preset the initial support pressure threshold of the upper pressure plate 200, thereby realizing the coordinated cooperation of load sensing, angle self-adaptation and pressure preset.

[0023] like Figures 3 to 6 As shown, the angle self-adaptive mechanism 400 also includes several first disc springs 470 fixed to the inner surface of the bottom of the lifting platform 100, and movable plates 4100 fixed to the top of each of the two first disc springs 470; several sliding frames 4110 are fixed to the top of each pair of movable plates 4100, and sliders 4120 are slidably connected to the inner walls of each movable plate 4100; the lower sides of the inclined support plates 430 are rotatably connected to the sliders 4120 through rotating shafts 4130; hydraulic cylinders 460 are fixedly connected to the inner sides of the pair of movable plates 4100, and the bottom sides of the hydraulic cylinders 460 are fixedly connected to... A diversion pipe 490 is provided, and the inner cavity of the hydraulic cylinder 460 is filled with hydraulic oil. A pressure rod 480 is fixedly connected to the bottom of the upper pressure plate 200, and the outer wall of the pressure rod 480 slides through the lower pressure plate 410. The end of the pressure rod 480 is slidably connected to the inner cavity of the hydraulic cylinder 460 through a pressure plate. A transverse stopper rod 450 is slidably connected to the inner cavity of the diversion pipe 490, and several push blocks 440 are fixedly connected to the outer wall of the transverse stopper rod 450. The side walls of the multiple push blocks 440 abut against the outer wall of the inclined support plate 430, and the transverse stopper rods 450 move through the inner side of the inclined support plate 430.

[0024] Using the above scheme: According to the principle of force decomposition, the supporting force F of the inclined brace 430 on the car bottom can be decomposed into a vertically upward component Fᵥ, which can directly counteract the weight of the cargo, and a horizontal component F. hThe main function of the brace is stabilization. The smaller the angle of the 430° angle of the brace plate, the smaller the vertical component force Fᵥ=F*sinθ, meaning the efficiency of the brace plate 430 in resisting vertical loads decreases. To provide the same vertical support force, the brace plate 430 itself needs to withstand a larger axial force, which may lead to instability or require stronger members. The larger the angle of the 430° angle of the brace plate, the larger the vertical component force Fᵥ=F*sinθ, resulting in higher support efficiency. However, at the same time, the horizontal thrust of the brace plate 430 on the support point also increases, which places higher demands on the lateral stiffness of the connection point and the entire support frame. Therefore, there exists an optimal angle range. For the bracing structure of freight elevators, engineering generally considers 45° to 60° to be a reasonable range that balances vertical support efficiency and structural stability. When the load distribution changes, for example, when the cargo is concentrated at the front of the car floor, the angle of the front diagonal brace 430 may need to be adjusted to a better value to support this concentrated load more efficiently, while the rear diagonal brace 430 can be adjusted to another angle. The downward movement of the upper pressure plate 200 causes the pressure rod 480 fixed to its bottom to move downwards synchronously. The pressure plate at the end of the pressure rod 480 squeezes the hydraulic oil in the inner cavity of the hydraulic cylinder 460, causing the hydraulic oil to generate pressure. Since hydraulic oil can be considered an incompressible fluid medium within the engineering pressure range, the linear displacement of the pressure rod 480 squeezes the hydraulic oil, which is then transmitted to the inner cavity of the two side distribution pipes 490, which are fixedly connected to the bottom sides. This pushes the transverse stopper rod 450, which is slidably connected to the inner cavity of the distribution pipe 490, to move outwards. This ensures that the movement amount and speed of the two side transverse stopper rods 450 are completely consistent, thereby ensuring that the diagonal bracing plates 430 on both sides of the lifting platform 100 deflect synchronously, avoiding the torsion or uneven load of the car bottom caused by inconsistent support angles on both sides. Several push blocks 440 are fixed to the outer wall of the transverse stop rod 450. The side wall of the push block 440 abuts against the outer wall of the diagonal brace plate 430. Therefore, when the transverse stop rod 450 moves outward, the push blocks 440 simultaneously push the lower end of the diagonal brace plate 430 to deflect outward. Since the upper end of the diagonal brace plate 430 is rotatably connected to the fixed block 420 through the pivot 4130 to form a fixed hinge point, and the lower end is rotatably connected to the slider 4120 through another pivot 4130, and the slider 4120 is slidably connected inside the slide frame 4110, the lower end of the diagonal brace plate 430 slides outward along the slide frame 4110 under the push of the push blocks 440, causing the diagonal brace plate 430 to deflect outward around the upper pivot 4130. The angle between the diagonal brace plate 430 and the moving plate 4100 gradually increases from the initial 45°, turning towards a more vertical direction, but not exceeding 60°. Once the brace plate 430 approaches verticality, its vertical component force increases with the angle, significantly improving support efficiency and more effectively counteracting the downward pressure generated by the weight of the cargo. Simultaneously, under the same vertical load, the axial pressure on the brace plate 430 decreases with increasing angle, effectively reducing compressive losses and buckling risk. As the cargo weight increases, the downward movement distance of the upper pressure plate 200 increases, the pressure of the hydraulic oil squeezed by the pressure rod 480 increases, the outward movement distance of the transverse stopper rod 450 increases, and the deflection angle of the brace plate 430 increases, achieving automatic and continuous adaptation of the support angle to the cargo weight.

[0025] like Figures 6 to 8 As shown, the elastic setting mechanism 500 includes several sets of slide grooves 550 equidistantly opened on the top of the lower pressure plate 410, and a U-shaped slide 510 is slidably connected in each set of slide grooves 550; the top of each U-shaped slide 510 is engaged with a second disc spring 520 by a locking block 540, and the top of each second disc spring 520 abuts against the bottom of the upper pressure plate 200; both sides of the lifting platform 100 are fixedly connected with baffles 530, and the bottom of the baffles 530 abuts against the upper pressure plate 200.

[0026] The above scheme involves the operator sliding the U-shaped carriage 510 along the groove 550 on the top of the lower pressure plate 410 to insert a selected number and specification of second disc springs 520 into a predetermined position between the upper pressure plate 200 and the lower pressure plate 410. The second disc springs 520 are secured to the top of the U-shaped carriage 510 by a locking block 540, achieving detachable fixation of the second disc springs 520 on the U-shaped carriage 510, with their tops abutting against the bottom of the upper pressure plate 200. The operator can quickly replace the second disc springs 520 of different specifications according to different working conditions, thereby preset the initial support pressure threshold of the upper pressure plate 200. Under light loads, fewer or lower stiffness second disc springs 520 are selected to ensure the system's sensitive response to light loads. Under heavy loads, more or higher stiffness second disc springs 520 are selected to prevent the upper pressure plate 200 from directly pressing to the bottom under heavy loads and losing its angle adjustment capability. This achieves flexible adaptation of the equipment to different load conditions.

[0027] Working principle and usage process of this invention: First, the lifting platform 100 is connected to an external lifting machine via several mounting sleeves 300 fixed to both sides, achieving overall lifting movement. An upper pressure plate 200 is slidably connected to the middle of the lifting platform 100. In the initial state, the upper pressure plate 200 is in an unpressurized raised position, with its bottom abutting against the stop bars 530 fixed to both sides of the lifting platform 100. The stop bars 530 limit the initial position of the upper pressure plate 200 and reduce the space for reciprocating rebound, allowing the upper pressure plate 200 to quickly reach equilibrium. At this time, the pressure rod 480 fixed to the bottom of the upper pressure plate 200 is in the raised position. The outer wall of the pressure rod 480 slides through the lower pressure plate 410, and its end pressure plate is located above the inner cavity of the hydraulic cylinder 460. The hydraulic oil in the hydraulic cylinder 460 is at atmospheric pressure. In the angle self-adaptive mechanism 400, the upper end of the inclined support plate 430 is rotatably connected to the fixed block 420 via the rotating shaft 4130. The fixed block 420 is fixed to the bottom of the lower pressure plate 410. The lower end of the inclined support plate 430 is rotatably connected to the slider 4120 via the rotating shaft 4130. The slider 4120 is slidably connected to the slide frame 4110. The slide frame 4110 is fixed to the top of the moving plate 4100. Several first disc springs 470 are fixed to the bottom of the moving plate 4100. The bottom of the first disc springs 470 is fixed to the inner surface of the bottom of the lifting platform 100. In the initial state, the angle between the inclined support plate 430 and the moving plate 4100 is a preset initial angle, such as 45°. At this time, the inclined support plate 430 is in an inclined support state, which has a certain vertical support component force without excessively occupying horizontal space. In the elastic setting mechanism 500, the operator has slid the U-shaped carriage 510 along the slide groove 550 opened on the top of the lower pressure plate 410 according to the expected weight range of the goods, and sent the selected number and specifications of second disc springs 520 between the upper pressure plate 200 and the lower pressure plate 410. The second disc springs 520 are engaged with the top of the U-shaped carriage 510 by the locking block 540, and their top abuts against the bottom of the upper pressure plate 200, thereby preset the initial support pressure threshold of the upper pressure plate 200.

[0028] Secondly, when goods or forklifts enter the lifting platform 100 and press against the top of the upper pressure plate 200, the upper pressure plate 200 slides downward along the lifting platform 100 under the weight of the goods. The downward movement of the upper pressure plate 200 first compresses the second disc spring 520, causing it to deform proportionally to the weight of the goods, providing a first-level elastic buffer and support for the upper pressure plate 200. Simultaneously, the downward movement of the upper pressure plate 200 causes the pressure rod 480 fixed to its bottom to move downward in sync. The pressure plate at the end of the pressure rod 480 squeezes the hydraulic oil in the inner cavity of the hydraulic cylinder 460, generating pressure in the hydraulic oil. The hydraulic oil in the hydraulic cylinder 460 is squeezed into the inner cavity of the two side diversion pipes 490, which are fixedly connected to both sides of the bottom, pushing the transverse stopper rod 450, which is slidably connected to the inner cavity of the diversion pipe 490, to move outward. Several push blocks 440 are fixed to the outer wall of the transverse stop rod 450. The side wall of the push block 440 abuts against the outer wall of the diagonal brace plate 430. Therefore, when the transverse stop rod 450 moves outward, the push blocks 440 simultaneously push the lower end of the diagonal brace plate 430 to deflect outward. Since the upper end of the diagonal brace plate 430 is rotatably connected to the fixed block 420 through the pivot 4130, and the lower end is rotatably connected to the slider 4120 through the pivot 4130, and the slider 4120 is slidably connected inside the slide frame 4110, the lower end of the diagonal brace plate 430 slides outward along the slide frame 4110 under the push of the push blocks 440, causing the diagonal brace plate 430 to deflect outward around the pivot 4130 at the upper end. The angle between the diagonal brace plate 430 and the moving plate 4100 gradually increases from the initial 45°, turning towards a more vertical direction, but not exceeding 60°. This angular change directly alters the support characteristics of the inclined brace 430. As the inclined brace 430 approaches verticality, its vertical component force Fᵥ=F*sinθ increases with the angle θ, significantly improving support efficiency. This allows it to more effectively counteract the downward pressure generated by the weight of the cargo and reduce the pressure loss of the inclined brace 430. Simultaneously, when the lower end of the inclined brace 430 slides outward, the slider 4120 and slide frame 4110 drive the moving plate 4100 downward, compressing the first disc spring 470 fixed to the bottom of the moving plate 4100. The first disc spring 470 plays a dual role in this process: firstly, its compression deformation compensates for the longitudinal displacement generated during the deflection of the inclined brace 430, ensuring smooth deflection without jamming. Secondly, as a second-stage elastic buffer element, the first disc spring 470 further disperses and absorbs the weight of the cargo, forming a two-stage buffer system with the second disc spring 520 to jointly bear the cargo load. Furthermore, the transverse stop rod 450 moves through the inner inclined support plate 430, ensuring that the push block 440 always maintains effective contact with the inclined support plate 430, preventing support failure due to the inclined support plate 430 deflecting and losing contact. As the weight of the cargo increases, the upper pressure plate 200 moves downward a greater distance, the pressure of the pressure rod 480 compressing the hydraulic oil increases, the transverse stop rod 450 moves outward a greater distance, and the deflection angle of the inclined support plate 430 increases, achieving automatic and continuous adaptation of the support angle to the weight of the cargo.

[0029] Secondly, after the cargo is unloaded, the upper pressure plate 200 loses its cargo pressure, and the first disc spring 470 and the second disc spring 520 release their stored elastic potential energy. The first disc spring 470 pushes the moving plate 4100 upward, which, through the slider 4120 and the sliding frame 4110, pushes the lower end of the inclined support plate 430 to slide inward and reset. At the same time, it drives the transverse stopper rod 450 and the push block 440 to move inward, pushing the hydraulic oil in the diversion pipe 490 back to the hydraulic cylinder 460. The pressure rod 480 returns to its original position as the hydraulic oil pressure decreases, pushing the upper pressure plate 200 to slide upward and reset. The second disc spring 520 simultaneously releases its elastic force, assisting in pushing the upper pressure plate 200 to return upward. The stop bar 530 abuts against the upper pressure plate 200, effectively reducing the reciprocating spring amplitude of the upper pressure plate 200 during the reset process, allowing it to quickly reach the equilibrium position for easy use in the next loading. Throughout the reset process, each linkage structure operates in the reverse order of loading, automatically returning to the initial standby state.

[0030] Finally, throughout the entire support process, the angle self-adaptive mechanism 400 and the elastic setting mechanism 500 form a complete closed-loop self-adjusting system through mechanical linkage. The upper pressure plate 200, as the sole load input point, simultaneously drives two transmission paths through its downward movement. One path, via a hydraulic transmission chain from the pressure rod 480, hydraulic cylinder 460, diverter pipe 490, and transverse stopper rod 450 to the push block 440, converts the load into an angular deflection of the inclined support plate 430. The other path, through direct compression of the second disc spring 520 and the first disc spring 470, converts the load into stored elastic potential energy. The two paths achieve load diversion at the upper pressure plate 200, angle self-adaptation at the inclined support plate 430, and two-stage buffering coordination at the first disc spring 470 and the second disc spring 520. This allows the support angle of the inclined support plate 430 to automatically and continuously change with the weight of the cargo; the heavier the cargo, the closer the inclined support plate 430 is to vertical, and the higher the support efficiency. Meanwhile, operators can pre-place different numbers or specifications of second disc springs 520 according to different expected cargo weight ranges using the U-shaped carriage 510 and locking block 540 in the elastic setting mechanism 500. This sets the initial pressure threshold of the upper pressure plate 200, preventing it from being pressed directly to the bottom and losing its adjustability when the cargo is too heavy, thus further expanding the load adaptability range of the equipment. The overall structure is simple and reliable, effectively solving the technical problem that traditional fixed-angle diagonal braces cannot adapt to different load conditions, and significantly improving the support stability and safety of large-tonnage freight elevators under different load conditions.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A support assembly for a large-tonnage freight elevator, comprising a lifting platform (100), wherein a plurality of mounting sleeves (300) are fixedly connected to both sides of the lifting platform (100), and a lifting machine is externally connected to the mounting sleeves (300), and an upper pressure plate (200) is slidably connected to the middle of the lifting platform (100), characterized in that, Also includes: Angle self-adaptation mechanism (400) is located on the lifting platform (100), and at least two sets of angle self-adaptation mechanisms (400) are provided. An elastic setting mechanism (500) is connected to an angle self-adapting mechanism (400); The angle self-adaptation mechanism (400) includes a lower pressure plate (410) slidably connected to the lower side of the lifting platform (100). Several fixing blocks (420) are fixed to the bottom of the lower pressure plate (410). A diagonal brace plate (430) is rotatably connected to the middle of the fixing block (420) through a rotating shaft (4130).

2. The support assembly for a large-tonnage freight elevator according to claim 1, characterized in that: The angle self-adaptation mechanism (400) also includes a plurality of first disc springs (470) fixed to the inner surface of the bottom of the lifting platform (100), and a movable plate (4100) is fixed to the top of each of the first disc springs (470) on both sides.

3. The support assembly for a large-tonnage freight elevator according to claim 2, characterized in that: Each of the two movable plates (4100) has several sliding frames (4110) fixedly connected to its top. The inner walls of the movable plates (4100) are slidably connected to sliders (4120). The lower sides of the inclined support plates (430) are rotatably connected to the sliders (4120) via rotating shafts (4130).

4. The support assembly for a large-tonnage freight elevator according to claim 3, characterized in that: A hydraulic cylinder (460) is fixedly connected to the inner side of a pair of movable plates (4100). Both sides of the bottom of the hydraulic cylinder (460) are fixedly connected to a diversion pipe (490). The inner cavity of the hydraulic cylinder (460) is filled with hydraulic oil.

5. The support assembly for a large-tonnage freight elevator according to claim 4, characterized in that: The upper pressure plate (200) is fixedly connected to the bottom of the pressure rod (480), and the outer wall of the pressure rod (480) slides through the lower pressure plate (410). The end of the pressure rod (480) is slidably connected to the inner cavity of the hydraulic cylinder (460) through the pressure plate.

6. The support assembly for a large-tonnage freight elevator according to claim 5, characterized in that: The inner cavity of each diverter tube (490) is slidably connected to a transverse plug rod (450), and a number of push blocks (440) are fixed to the outer wall of the transverse plug rod (450).

7. The support assembly for a large-tonnage freight elevator according to claim 6, characterized in that: The sidewalls of the multiple push blocks (440) abut against the outer wall of the bracing plate (430), and the transverse plug rods (450) movably pass through the inner side of the bracing plate (430).

8. The support assembly for a large-tonnage freight elevator according to claim 1, characterized in that: The elastic setting mechanism (500) includes several sets of slide grooves (550) equidistantly opened on the top of the lower pressure plate (410), and each set of slide grooves (550) is slidably connected to a U-shaped slide (510).

9. The support assembly for a large-tonnage freight elevator according to claim 8, characterized in that: The top of each U-shaped carriage (510) is secured with a second disc spring (520) via a locking block (540), and the top of each second disc spring (520) abuts against the bottom of the upper pressure plate (200).

10. The support assembly for a large-tonnage freight elevator according to claim 9, characterized in that: Both sides of the lifting platform (100) are fixed with baffles (530), and the bottom of the baffles (530) abuts against the upper pressure plate (200).

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