Anti-deformation self-adaptive lifting system

Abstract

The invention discloses an anti-deformation self-adaptive lifting system. The anti-deformation self-adaptive lifting system comprises a guide component, an actuating mechanism and a sliding assembly. The sliding assembly comprises an integrally-formed sliding block, a plurality of elastic arms capable of retreating in the radial direction are formed by the sliding block through a slotting structure, and at least two elastic arms in different directions share a containing cavity in the sliding block. When the guide component generates nonlinear deformation due to stress, the elastic arm absorbs the size change through mechanical retreat displacement, and positive pressure increment between the sliding block and the rail is limited, so that resistance is reduced, and stability is improved. Through the space nested design, the screw rod is arranged in the containing cavity in a penetrating mode, decoupling absorption of multidirectional deformation is achieved while the structure is kept extremely compact, and the technical problem of clamping stagnation and jumping of a long-stroke guide pipe is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lifting devices, and relates to an anti-deformation self-adaptive lifting system. BACKGROUND

[0002] The existing sliding table type lifting device usually adopts a thin-walled metal track, and transfers power from the inside to the outside through a strip-shaped groove formed in the side wall of the pipe. After the strip-shaped groove is processed, the pipe body is prone to "waist shrinkage" depression due to stress release. The sample test shows that when a 700mm long and 1.5mm thick rectangular iron pipe is single-sidedly grooved for 600mm, the pipe wall depression at the middle of the strip-shaped groove and the adjacent surface can reach 0.5mm on the single side. The traditional rigid sliding assembly cannot absorb the deformation displacement, resulting in a surge of operating current from 1A to 3A, causing the device to stop. The application aims to provide a mechanical real-time compensation system. SUMMARY

[0003] The core of the application is to utilize the rigid-flexible conversion of the sliding block body structure to realize "multi-directional compensation" and "spatial nesting". The sliding block body is formed into an elastic arm of a cantilever beam structure through a slit groove, and a shared accommodating cavity is arranged at the corner. The threaded cooperation structure is skillfully avoided between the cavities, and the screw rod is placed in the redundant space of the accommodating cavity, which not only realizes the dynamic retreat compensation of the front surface and the left / right surface in three directions, but also maintains the miniaturization of the sliding block overall size, supporting the overall assembly from the end of the guide pipe. This design realizes the effect of "three surface compression and overall retreat". When the side surface or the front surface of the guide member is depressed, the elastic arm has a low radial stiffness, and a small increase in pressure can obtain a large displacement compensation, thereby ensuring the dynamic stability of the friction resistance. By making the elastic arms intersecting at an angle share the accommodating cavity at the corner position, the radial compression from different directions is completed in the same elastic space to realize the decoupling absorption of multi-directional deformation.

[0004] Compared with the prior art, the application has the following beneficial effects:

[0005] Multi-directional dynamic self-adaptation: the 90-degree corner shared cavity design enables the system to simultaneously compensate for the nonlinear deformation of the front surface and the side surface.

[0006] Extreme space utilization: the threaded transmission structure is arranged between the coaxial accommodating cavities, and the screw rod passes through the cavities, greatly reducing the volume of the sliding assembly and supporting the overall end assembly.

[0007] High reliability and low cost: under light load, the elasticity of the material body is relied on, and under heavy load, interference fit C-shaped springs can be optionally added, which adaptively covers various load specifications. There is no sensor, and maintenance is not required, which completely solves the sticking point. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1Schematic diagram of application of the example.

[0009] Figure 2 System perspective view (showing the path of the screw through the receiving cavity and the threaded engagement structure).

[0010] Figure 3 Top view of the slider (showing the layout of the 90-degree corner shared cavity and elastic arm).

[0011] Figure 4 3D view of the slider (showing guide ribs, slots and external connection holes).

[0012] Figure 5 Schematic diagram of the deformation (waist shrinkage) of the guide component during processing.

[0013] In the picture:

[0014] 1. Monitor lifting bracket; 10. Guide component; 11. Tube body; 12. Strip groove; 13. Opening; 14. Mounting part; 15. Top cover; 20. Sliding assembly; 21. Slider; 211. Threaded mating structure; 212. Guide contact structure; 213. Slotted structure; 214. Elastic arm; 215. Accommodating cavity; 216. Threaded hole; 22. Elastic element; 30. Actuation mechanism; 31. Driver; 32. Screw; 40. Monitor mounting plate; 50. Monitor; 60. Base. Detailed Implementation

[0015] like Figures 1 to 5 As shown, this embodiment discloses an anti-deformation adaptive lifting system applied to a display lifting bracket 1, including a guide component 10, a sliding component 20, and an actuation mechanism 30.

[0016] The guide member 10 is a hollow profile structure with a guide cavity extending in the lifting direction inside. The side wall of the guide member 10 has at least one strip groove 12 that communicates with the guide cavity and extends in the lifting direction, used to transmit the movement of the sliding assembly 20 to the outside of the guide member 10. The guide member 10 also has a mounting part 14 inside, which is fixedly disposed within the guide cavity for mounting the driver 31 in the actuation mechanism 30, and / or for fixing the guide member 10 to an external support structure such as a base 60.

[0017] The tube body 11 has an opening 13 at its end. Since the maximum radial dimensions of both the sliding assembly 20 and the actuating mechanism 30 are smaller than the minimum radial inner diameter of the guide cavity, the sliding assembly 20 and the actuating mechanism 30 can be inserted into the guide cavity as a whole through the opening 13 at the end of the tube body 11 after pre-assembly. This "whole end assembly" method eliminates the need for additional assembly process holes on the side wall of the tube body 11, thus ensuring the structural strength and aesthetic integrity of the guide member 10.

[0018] Optionally, after assembly, a top cover 15 may be further provided at the opening 13. The top cover 15 is used to close the opening 13, serving to prevent dust, protect the internal transmission structure, and enhance the overall visual effect of the lifting device. The actuation mechanism 30 includes a driver 31 and a screw 32 that rotates under the drive of the driver 31. In this embodiment, the driver 31 is an integrated worm gear reducer motor.

[0019] The sliding component 20 is disposed in the guide cavity of the guide member 10 and includes an integrally formed slider 21. The slider 21 is made of a polymer material with elastic recovery properties, such as polyoxymethylene (POM).

[0020] The slider 21 is provided with a threaded engagement structure 211 that is in transmission with the screw 32. The screw 32 engages with the threaded engagement structure 211, so that the slider 21 moves along the lifting direction of the guide member 10 when the screw 32 rotates.

[0021] The slider 21 has multiple guide contact structures 212 extending along the lifting direction on its outer periphery for sliding engagement with the inner wall of the guide member 10. The slider 21 also has multiple slotted structures 213, which partially separate the slider body containing the guide contact structures 212, forming elastic arms 214 that can retract inward relative to the slider body. The elastic arms 214 are distributed circumferentially along the slider 21 (e.g., forming four or eight elastic arms) to correspond to different force orientations of the slider 21, achieving multi-directional guidance and adaptive compensation.

[0022] refer to Figure 5 As shown, after the guide member 10 is processed with the strip groove 12, due to the release of internal stress in the metal profile, the tube body 11 is prone to nonlinear structural deformation (i.e., "waist shrinkage") along its length. Specifically, when measured along the length of the tube body 11, the side wall where the strip groove 12 is located and the two adjacent side walls show inward concavity in the middle region along the length direction.

[0023] like Figure 5 As shown, the lateral span distances A and D in the central region are significantly smaller than the corresponding span distances B and C, and E and F at both ends. This nonlinear deformation causes the radial inner diameter of the guide cavity to be unevenly distributed along the lifting path. Prototype measurements show that when a rectangular iron pipe with a length of 700mm and a wall thickness of 1.5mm has a 600mm groove on one side, the wall concavity on the surface of the groove and its adjacent surfaces in the middle of the groove can reach Δd 0.5mm on one side. This micron-level size reduction would cause a huge mechanical interference squeeze for traditional rigid sliding components, while this invention absorbs this deviation through the radial yield displacement of the elastic arm 214.

[0024] The key spatial feature of this embodiment is that the slider 21 has four longitudinally coaxially arranged circular receiving cavities 215 at its four corners. The threaded engagement structure 211 is disposed between any pair of coaxially arranged receiving cavities 215. The screw 32 passes sequentially through one receiving cavity 215, the threaded engagement structure 211, and the other receiving cavity 215, and a non-contact gap is maintained between the screw 32 and the inner wall of each receiving cavity 215, thereby avoiding additional friction between the screw 32 and the slider 21 in non-transmission parts.

[0025] In one alternative embodiment, an elastic element 22 (such as a C-type spring) may be provided inside the accommodating cavity 215. The elastic element 22 is sleeved on the outside of the screw 32 and maintains a gap therebetween. The force-bearing end of the elastic element 22 abuts against the back of two elastic arms 214 arranged at an included angle to each other, so as to provide a continuous elastic support force to the elastic arms 214.

[0026] When the guide member 10 undergoes cross-sectional reduction deformation due to stress release from the processing of the strip groove 12 or the action of external load, the inner wall of the guide member 10 presses against the guide contact structure 212, and the elastic arm 214 is pressed towards the accommodating cavity 215, resulting in a mechanical retraction displacement. Through this adaptive compensation mechanism, the change in normal pressure between the slider 21 and the guide member 10 is limited to a preset threshold, avoiding a sharp increase in sliding resistance, thereby ensuring the smooth operation of the sliding assembly 20 along the lifting direction.

[0027] The sliding component 20 is provided with a connecting part 216 at the position corresponding to the strip groove 12. The connecting part 216 is a threaded hole provided on the slider 21. External components such as the display mounting plate 40 or the load can be connected to the connecting part 216 via the strip groove 12 through a detachable connection structure such as an isolation stud, so as to realize the lifting and lowering adjustment of the display 50.

[0028] Mechanical equilibrium process and calculation formula: The driving torque M when the sliding component moves to the deformation zone is linearly related to the total frictional resistance f.

[0029] M≈1 / η⋅f⋅L / 2π, where L is the pitch and η is the transmission efficiency. In an uncompensated rigid system, the deformation Δd

[0030] This can trigger material compression, causing the normal force F to approach infinity, leading to motor overload. In this invention's system, an equivalent compensating stiffness Keq is introduced:

[0031] ΔF=Keq⋅Δd

[0032] Keq is determined by the deflection stiffness k1 of the elastic arm and the stiffness k2 of the elastic element (spring). Through design, k1 + k2 is made much smaller than the cross-sectional compressive stiffness of the tube, thus minimizing the increment of ΔF. Prototype data comparison:

[0033] Before using this invention: the middle current I = 3.0A (blocked);

[0034] After adopting this invention: the middle current I = 1.15A (smooth operation).

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A deformation-resistant self-adapting lift system, characterized in that, The application relates to a guiding member (10) with an internal guiding cavity, a side wall of the guiding member (10) being provided with at least one strip-shaped slot (12); an actuating mechanism (30) comprising a driver (31) and a screw rod (32); and a sliding assembly (20) arranged in the guiding cavity. The sliding assembly (20) comprises an integrally-formed sliding block (21), the sliding block (21) being provided with a thread matching structure (211) matched with the screw rod (32) in a transmission mode, and the outer periphery of the sliding block (21) being provided with a guiding contact structure (212) matched with the inner wall of the guiding member (10). The sliding block (21) is provided with a slotted structure (213), the slotted structure (213) locally separates the sliding block body where the guiding contact structure (212) is located, and forms elastic arms (214) which can be retracted inwards. At least two of the elastic arms (214) are arranged at different positions and form an included angle with each other, and the at least two elastic arms (214) share a containing cavity (215) arranged in the sliding block (21). The sliding block (21) is provided with a connecting portion (216) at a position corresponding to the strip-shaped slot (12), external loads are connected with the connecting portion (216) through the strip-shaped slot (12) to transmit the movement of the sliding assembly (20) to the outside. The guiding member (10) is internally provided with at least one mounting portion (14) for fixing the driver (31) and / or connecting the guiding member (10) to an external supporting structure. When the guiding member (10) is radially deformed and acts on the guiding contact structure (212), the elastic arms (214) produce mechanical retraction displacement to adaptively absorb the deformation amount. The containing cavities (215) are arranged in pairs and coaxially in the longitudinal direction of the sliding block (21); and the thread matching structure (211) is arranged between the two containing cavities (215) on the same axial side. The screw rod (32) sequentially penetrates the containing cavities (215) and the thread matching structure (211), and a non-contact gap is kept between the screw rod (32) and the inner wall of the containing cavities (215). The elastic recovery capacity of the elastic arms (214) is provided by the elastic properties of the material of the sliding block (21) body, and the material is a high-molecular polymer with self-lubricating properties. The containing cavities (215) are internally provided with elastic members (22), at least two force receiving ends of the elastic members (22) abut against the inner back surfaces of the elastic arms (214) arranged at an included angle with each other, so as to provide additional radial supporting force to the elastic arms (214).

2. The lift system of claim 1, wherein: The elastic members (22) are any one or combination of C-shaped springs, leaf springs or high-molecular elastic bodies with elastic recovery capacity which are interference-fitted in the containing cavities (215).

3. The lift system of claim 2, wherein: The driver (31) is a reduction driving device with a self-locking function.

4. The lift system of claim 1, wherein: The application further discloses a method for manufacturing the sliding assembly (20).

5. The lift system of claim 1, wherein: ​ 6. The lift system of claim 5, wherein: ​ 7. The lift system of claim 1, wherein: ​ 8. A method of dynamic drag compensation for an elevator system as defined in claim 1, wherein, ​ Displacement conversion stage: When the sliding assembly (20) moves to the cross-section reduction deformation zone of the guide member (10), the inward displacement of the guide cavity wall is transmitted to the elastic arm (214) through the guide contact structure (212); Potential energy distribution stage: The two elastic arms (214) located in the shared accommodating cavity (215) at the corner of the slider retreat synchronously, converting the inward displacement into the material deformation energy of the elastic arm body or the potential energy of the auxiliary elastic member (22); Resistance control stage: By self-adapting adjustment of the radial stiffness of the slider (21), the positive pressure increment between the slider and the guide cavity wall caused by the deformation is limited within a certain range, so that the driving current increment during the operation of the actuating mechanism (30) is controlled within 20% of the rated operating current.

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