Anti-jamming telescopic platform

Abstract

The anti-blocking telescopic platform is characterized in that: the upper part of the table assembly is provided with a table plate, and the two sides of the table assembly are provided with front low and rear high inclined table slide rails; the lower part of the table assembly is provided with a rear cross beam; the tongue plate assembly is arranged between the table plate and the rear cross beam, the lower end surface of the tongue plate is provided with a plurality of longitudinal tongue plate reinforcing ribs, the lower end surface of the front side of the tongue plate is provided with a supporting leg, and the two sides of the tongue plate assembly are respectively provided with side sliding blocks. When the tongue plate assembly is extended, the side sliding blocks of the tongue plate assembly slide along the table slide rails downward, and the rear end of the tongue plate assembly is in contact with the lower end surface of the table plate; then, when the supporting leg is overlapped on the truck and bears the load, the tongue plate assembly is turned over until the tongue plate reinforcing ribs are in contact with the rear cross beam. According to the scheme, the front low and rear high inclined table slide rails arranged on the two sides of the table assembly realize the adaptive bending deformation of the table assembly, and provide a redundant gap for the tongue plate extension. The structure is simple, the reliability is high, the weight is light, the movement is smooth, and the noise is low.

Description

Technical Field

[0001] This utility model relates to loading and unloading telescopic platform machinery and equipment, specifically a telescopic platform with inclined rails and segmented tongue plates to prevent jamming. Background Technology

[0002] In the field of loading and unloading platforms, telescopic tongues are a key component for achieving seamless connection between vehicles and platforms; their core function lies in flexibly adjusting the overlap distance by extending and retracting to accommodate different types of trucks. However, traditional telescopic tongue structures still have many shortcomings in terms of reliability, maintenance costs, and adaptability that urgently need to be addressed.

[0003] Currently, the mainstream traditional solutions mainly fall into the following two structural categories:

[0004] 1) Pulley system: This solution typically involves installing multiple pulleys under and on both sides of the tongue plate, using the rolling of these pulleys on a track to extend and retract the tongue plate. However, this traditional technology has significant inherent drawbacks:

[0005] Complex structure and difficult installation and debugging: Multiple pulleys require precise installation and leveling, demanding high manufacturing and assembly precision; otherwise, uneven force distribution, accelerated wear, or jamming can easily occur. Low reliability and frequent maintenance: As moving parts, especially under heavy loads, high frequencies, or harsh environments (such as cold storage), pulleys are prone to bearing damage and rubber wheel surfaces are easily worn or aged, requiring frequent replacement, increasing maintenance costs and workload. Operating noise issues: After long-term use, wear may create gaps between the pulleys and the track, causing abnormal noises during extension and retraction.

[0006] 2) Linear Guide Rails: To overcome some of the shortcomings of pulley systems, linear guide rails (or linear guide rails) have emerged as a solution. While this solution improves guiding accuracy to some extent, it introduces new problems: poor adaptability to platform deformation. The platform of the unloading platform, especially the front part, bends downward due to its own weight when there is no support underneath. Since rigid linear guide rails cannot adapt to this deformation, the gap between the tongue plate and the rail changes, making it prone to scraping and jamming, seriously affecting the reliability of use, and producing harsh metallic friction noise and wear.

[0007] To address the issue of countertop bending and deformation, existing technologies employ passive adaptive methods such as "grooving" or "notching" the tongue plate. This design compromises the integrity and strength of the tongue plate structure, resulting in an unattractive product appearance and a less refined manufacturing process.

[0008] In addition, the lip plate used in the above two solutions is generally a patterned steel plate with a uniform thickness. This equal-thickness design brings significant drawbacks: excessive overall weight: to ensure sufficient strength at the front end of the lip plate where wheels are loaded, the entire lip plate must be made of a relatively thick steel plate, resulting in a huge weight. High required operating thrust and tendency to tilt: the overweight lip plate requires a driving mechanism with higher power to push it, increasing energy consumption. At the same time, when the heavy lip plate extends, its center of gravity moves forward, which makes it more prone to a downward tilting trend at the front end, aggravating the risk of friction and jamming with the platform surface, and also imposing an unbalanced load on the pulley or slide rail systems on both sides, affecting the service life.

[0009] Therefore, there is an urgent need in the art for a novel telescopic platform structure, which can fundamentally adapt to the working deformation of the platform surface, and at the same time has the advantages of simple structure, durability, light weight, easy maintenance and quiet operation, so as to overcome the comprehensive defects of the prior art. Utility Model Content

[0010] To solve the existing problems, the present utility model aims to provide an anti-jamming telescopic platform.

[0011] In order to achieve the above purpose, the technical solution adopted by the present utility model provides an anti-jamming telescopic platform, which includes a base frame assembly, a platform surface assembly, and a lip plate assembly. A hydraulic cylinder / oil cylinder on the base frame assembly drives the lip plate assembly to extend / retract toward the truck.

[0012] A platform surface plate is arranged on the upper part of the platform surface assembly, and platform surface slide rails that are inclined to be low at the front and high at the rear are respectively arranged on both sides of the platform surface assembly; a rear cross beam is arranged at the lower part of the platform surface assembly.

[0013] The lip plate assembly is arranged between the platform surface plate and the rear cross beam, and a plurality of longitudinally arranged lip plate reinforcing ribs are arranged on the lower end surface of the lip plate of the lip plate assembly; support legs are arranged on the lower end surface at the front side of the lip plate; side sliders are respectively arranged on both sides of the lip plate assembly. When the oil cylinder is started, the output rod of the oil cylinder extends and pushes the lip plate assembly to extend toward the truck, and the oil cylinder simultaneously rotates around the rotating shaft I and the rotating shaft II at its two ends; the side sliders of the lip plate assembly slide forward along the platform surface slide rails until the rear end of the lip plate assembly contacts the lower end surface of the platform surface plate. Subsequently, when the support legs are lapped on the truck and bear the load, the lip plate receives an upward moment from the support legs, and then the lip plate assembly flips around the rotating shaft II until the lower ends of the lip plate reinforcing ribs contact the upper end surface of the rear cross beam, which bears the load.

[0014] Wherein, the platform surface assembly further includes a front cross beam, and the lower ends of the lip plate reinforcing ribs are in sliding contact with the upper end surface of the front cross beam when the lip plate assembly extends.

[0015] Wherein, the upper end surface of the front cross beam is provided with a plurality of lip plate lower sliders that correspondingly contact the lower ends of the lip plate reinforcing ribs. Wherein, the front cross beam and the rear cross beam are connected by a plurality of cross beam reinforcing ribs to form a structure similar to the shape of the Chinese character "mu"; wherein, the front cross beam adopts channel steel or angle steel.

[0016] The rear crossbeam is made of square tubing.

[0017] In the tongue plate assembly, the tongue plate is formed by connecting a thick plate at the front and a thin plate at the rear.

[0018] Among them, the joint between the thick plate and the thin plate is provided with a tongue plate pad to keep the upper surface flat.

[0019] The thickness of the thick plate is 14-16mm.

[0020] The thickness of the thin plate is 6-8mm.

[0021] In the countertop assembly, the two sides of the countertop panel are connected to the upper end of the countertop side panel, and the countertop slide rail is fixed to the inner wall of the countertop side panel.

[0022] The tabletop slide rails are made of square tubing.

[0023] The lower end of the rear part of the tabletop is provided with several longitudinally arranged tabletop reinforcing ribs.

[0024] The two ends of the back panel of the countertop are connected to the side panels of the countertop, and the front end of the back panel of the countertop is connected to the rear end of the countertop reinforcing rib.

[0025] In the tongue plate assembly, the side slider has an L-shaped cross-section, with the lower end face of one side contacting the upper end face of the table slide rail, and the other side connected to the tongue plate assembly.

[0026] The upper end face of the tongue plate reinforcing rib is provided with a tongue plate tail slider for contacting the lower end face of the table panel.

[0027] The tongue assembly also features rear sliders on both sides for contacting the inner wall of the tabletop slide rail. These sliders, including the side sliders, lower tongue slider, tail tongue slider, and rear tongue slider, are made of engineering plastics (nylon PA, PA66, UPE, or polyoxymethylene POM) to ensure that all contact points between the tongue assembly and the tabletop assembly involve non-metallic sliding friction.

[0028] The bottom frame assembly is equipped with an oil pump and an oil cylinder. The oil cylinder is driven by the oil pump and is rotatably connected to the bottom frame assembly via rotating shaft I. The end of the output rod of the oil cylinder is rotatably connected to the middle of the tongue plate assembly via rotating shaft II.

[0029] Compared with existing technologies, this invention achieves adaptive bending deformation of the platform component by setting inclined platform slide rails on both sides of the platform component, which are lower at the front and higher at the rear, and also provides redundant clearance for the extension and retraction of the tongue plate. Several matching sliders ensure that non-metallic sliding friction is formed at all contact points with the platform throughout the extension, retraction, and limiting process of the tongue plate, thereby effectively reducing motion resistance, wear, and operating noise. The tongue plate is made of spliced ​​plates of different thicknesses, and leveling blocks are used at the splicing steps. While ensuring the local strength of the front end of the tongue plate and the overall structural rigidity, significant weight reduction is achieved, making the extension and retraction movement smoother and the appearance flat and uniform. This invention has a simple structure, high reliability, light weight, smooth movement, and low noise, and is particularly suitable for loading and unloading platforms with large extension and retraction stroke requirements. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the surface structure of an embodiment of the present invention (the tongue plate is in the retracted state).

[0031] Figure 2 for Figure 1 Top view.

[0032] Figure 3 This is a structural diagram of the countertop assembly.

[0033] Figure 4 This is a structural diagram of the countertop assembly.

[0034] Figure 5 This is a schematic diagram of the tongue plate assembly.

[0035] Figure 6 This is a schematic diagram of the tongue plate assembly.

[0036] Figure 7 This is a schematic diagram showing the tongue plate after it has been extended.

[0037] Figure 8 This is a diagram showing the tongue plate attached to the vehicle and the tongue plate after it has been flipped over.

[0038] The attached figures are labeled as follows:

[0039] 100 Tabletop assembly, 101 Tabletop panel, 102 Tabletop side panel, 103 Tabletop reinforcing rib, 104 Tabletop back panel, 105 Inclined tabletop slide rail, 106 Front crossbeam, 107 Crossbeam reinforcing rib, 108 Rear crossbeam, 109 Side crossbeam reinforcing rib, 110 Tongue plate lower slider.

[0040] 200 Tongue plate assembly, 201 Thick plate, 202 Thin plate, 203 Tongue plate pad, 204 Tongue plate side reinforcing rib, 205 Tongue plate middle reinforcing rib, 206 Tongue plate transverse reinforcing rib, 207 Side slider, 208 Tongue plate rear slider, 209 Tongue plate tail slider.

[0041] 300 base frame assembly, 301 hydraulic cylinder, 302 hydraulic pump. Detailed Implementation

[0042] The preferred embodiment of the present invention, a telescopic platform with inclined track and segmented tongue plate, will be described in detail below with reference to the accompanying drawings.

[0043] See Figures 1 to 8 This embodiment includes a base frame assembly, a platform assembly, and a tongue plate assembly. The tongue plate assembly is housed inside the platform assembly and is extended / retracted towards the vehicle by the base frame assembly via a hydraulic cylinder / oil cylinder. For ease of explanation, the direction towards the vehicle is referred to as "front," and the opposite direction as "rear"; the direction of the line connecting the front and rear is longitudinal.

[0044] See Figure 1-3 The countertop assembly includes a top countertop panel and two side panels. The countertop panel is horizontally oriented, and its left and right sides are connected to the top of the vertically oriented side panels. The left and right countertop slide rails are welded to the inner walls of the left and right side panels, respectively.

[0045] The tabletop slide rail is tilted with a lower front and higher rear to adapt to the bending deformation of the tabletop assembly and provide redundant clearance for tongue extension and retraction. The tilt angle of the tabletop slide rail needs to be designed / calculated based on the span of the tongue assembly and the expected maximum deformation, using conventional formulas. It should be ensured that when the tongue assembly bends and deforms due to its own weight, the gradually increasing gap between the front of the tabletop slide rail and the lower end of the tabletop panel can fully accommodate the deformed portion of the tongue, ensuring that the tongue assembly will not scratch the tabletop slide rail during the entire extension and retraction process; and that when the tongue assembly retracts, the front end of the tilted tabletop slide rail does not contact the tongue side slider, and will not scratch the side slider due to tongue retraction.

[0046] Furthermore, the lower part of the platform assembly is equipped with a front crossbeam and a rear crossbeam. The left and right ends of the front and rear crossbeams are vertically connected to the lower inner walls of the left and right platform side panels, respectively. Multiple tongue-plate sliders are installed on the upper surface of the front crossbeam. These sliders are made of wear-resistant engineering plastics (such as nylon PA, PA66, UPE, or polyoxymethylene POM). Their installation position corresponds to the lower end face of the tongue-plate reinforcing ribs of the tongue-plate assembly, allowing the tongue-plate to be directly supported on the plastic sliders by the high-strength tongue-plate reinforcing ribs during extension and retraction, achieving low-friction movement / sliding. The rear crossbeam bears the main weight when the tongue-plate is fully extended and overlapping the truck, thus requiring higher bending strength. Therefore, the front crossbeam preferably uses No. 10 channel steel or No. 10 angle steel for easy installation of slider bolts. The rear crossbeam uses a rectangular square tube structure with a height of 120mm or 140mm, which has a high bending modulus to ensure the overall structural stability.

[0047] Furthermore, the front and rear crossbeams are connected by four reinforcing ribs. The reinforcing ribs on the left and right sides are connected to the inner wall of the tabletop side, while the reinforcing ribs in the middle are evenly distributed and connected along the width, forming a U-shaped structure. The front and rear crossbeams can be horizontal, or they can be designed with a slight inclination, with the front lower than the rear, depending on the dimensions of other components.

[0048] Further, see Figure 3 The lower end of the tabletop is also provided with several longitudinally arranged tabletop reinforcing ribs. The two ends of the tabletop back panel are connected to the rear ends of the tabletop side panels, and the upper end of the tabletop back panel is connected to the rear end of the tabletop panel; the front end of the tabletop back panel is connected to the rear end of the tabletop reinforcing ribs to further enhance the structural strength.

[0049] See Figure 4-6 The tongue plate assembly is located within the tongue plate space formed between the upper platform panel, the left and right platform side panels, and the lower front / rear crossbeam. It mainly includes the tongue plate and tongue plate reinforcing ribs. The tongue plate body is positioned approximately horizontally (tilting forward and downward when retracted or extended) and is located at the front of the tongue plate assembly. Support legs are provided on the lower front surface of the tongue plate for support when assembling a truck.

[0050] See Figure 5 The tongue plate adopts a segmented design, which is welded from a thick plate at the front and a thin plate at the rear. Preferably, the thick plate of the tongue plate can be made of 16mm or 14mm patterned steel plate to withstand the direct crushing of truck wheels; the thin plate of the tongue plate can be made of 8mm or 6mm patterned steel plate to significantly reduce weight.

[0051] See Figure 5 Furthermore, the lower end face of the tongue plate is provided with several tongue plate reinforcing ribs arranged longitudinally. The rear section of the tongue plate reinforcing ribs extends rearward and occupies the rear position of the tongue plate assembly. Specifically, the tongue plate reinforcing ribs are located below the thin plate, including tongue plate side reinforcing ribs located on the left and right sides, and several tongue plate central reinforcing ribs located in the middle. The front ends of the tongue plate side reinforcing ribs and the tongue plate central reinforcing ribs are also connected to the tongue plate transverse reinforcing ribs arranged transversely, further improving the structural strength.

[0052] In addition, to ensure that the upper surface of the tongue plate assembly is flat and aesthetically pleasing and that the tongue plate reinforcing ribs on the lower surface are on the same plane, this embodiment preferably has a tongue plate pad welded at the joint step between the thick plate and the thin plate to make the surface flush.

[0053] See Figure 5The tongue plate assembly has side sliders on its left and right sides. In this embodiment, the side sliders have an L-shaped cross-section (angle steel). The lower end face of the horizontally positioned side is used to contact the upper end face of the table slide rail, while the other vertically positioned side is fixedly connected to the outer wall of the tongue plate side reinforcing rib of the tongue plate assembly by bolts. The side sliders are preferably made of engineering plastic. The L-shaped cross-sectional structure can simultaneously clamp the inclined table slide rail from the side and top, thereby limiting the tongue plate in the left and right directions, and providing auxiliary limiting in the up and down directions.

[0054] Preferably, to ensure that the contact points between the tongue assembly and the tabletop assembly are all non-metallic sliding friction, a tongue rear slider (preferably engineering plastic) is installed on the rear outer wall of the tongue side reinforcing rib. This slider contacts the inner wall of the tabletop slide rail and provides auxiliary lateral restraint. A tongue tail slider (preferably engineering plastic) is also installed on the upper end face of the rear end of the tongue reinforcing rib for contacting the lower end face of the tabletop panel. When the tongue extends, if its center of gravity exceeds the support point of the tabletop assembly, causing a downward tilting tendency at the front end, the tongue tail slider will contact the lower end face of the tabletop panel, thus creating an upward restraint and preventing the metal part of the tongue from impacting and rubbing against the tabletop.

[0055] The upper end of the base frame assembly is connected to the lower end of the tabletop assembly, and an oil cylinder and an oil pump are installed inside the frame below it. The oil cylinder is driven by the oil pump, and the cylinder body is rotatably connected to the rotating shaft hole on the base frame assembly through rotating shaft I. The end of the output rod at the upper end of the oil cylinder is rotatably connected to the middle of the tongue plate assembly through rotating shaft II.

[0056] See Figure 1 and Figure 2 Initially, the tongue assembly is housed within the tongue space of the platform assembly. When the oil pump is activated, it drives the cylinder, extending the cylinder's output rod and pushing the tongue assembly towards the truck. Simultaneously, the cylinder rotates around its two ends, pivot I and pivot II. The tongue's reinforcing ribs slide on the lower slider, while the side and rear sliders slide along the inclined platform rails, ensuring no lateral deviation. See also Figure 7 When most of the tongue plate assembly extends beyond the tabletop assembly, its front end tilts downwards due to its own weight. At this point, the slider at the tail end of the tongue plate, located on the upper surface of the rear end, contacts the lower surface of the tabletop, preventing further tilting and positioning the tongue. Throughout the entire extension process, all contact points involve sliding friction between plastic and metal, resulting in smooth, quiet operation without any abrasive scratches.

[0057] See Figure 8When the tongue plate is fully extended and laps onto the truck, it is subjected to an upward torque from the support legs. The tongue plate assembly then rotates around pivot II on both sides of its center until the lower end face of the tongue plate reinforcing rib contacts the upper end face of the rear crossbeam, where it bears the weight. The pressure of the weight is concentrated in the thicker area of ​​the tongue plate and transferred to the platform assembly through the contact between several tongue plate reinforcing ribs and the rear crossbeam. This is particularly supported by the I-shaped reinforcing structure centered on the rear crossbeam, ensuring the stability and reliability of the structure.

[0058] Especially at this time, the side sliders on both sides of the tongue plate, the rear slider of the tongue plate, the lower slider of the tongue plate, and the tail slider of the tongue plate are all in a non-contact, non-stressed state, avoiding the risk of slider cracking or deformation due to load, and improving the reliability and durability of the slider mechanism. The retraction process of the tongue plate assembly is the reverse of the above, and will not be described again, but it is equally smooth and reliable.

[0059] In summary, this utility model effectively solves the problems of jamming, wear, high noise, and heavy weight of traditional telescopic platforms through the coordinated design of inclined slide rails, segmented tongue plates, and multiple plastic sliders. It features reliable and durable structure, beautiful overall appearance, low cost, easy maintenance, and low operating noise.

[0060] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A telescopic platform with anti-jamming capability, comprising a base frame assembly, a platform assembly, and a tongue plate assembly, wherein a hydraulic cylinder / oil cylinder disposed on the base frame assembly drives the tongue plate assembly to extend / retract, characterized in that: The upper part of the tabletop assembly is equipped with a tabletop panel, and the two sides of the tabletop assembly are respectively equipped with tabletop slide rails that are inclined at the front and at the back; the lower part of the tabletop assembly is equipped with a rear crossbeam. The tongue plate assembly is located between the platform and the rear crossbeam. The lower end face of the tongue plate is provided with several tongue plate reinforcing ribs arranged longitudinally. The lower end face of the front side of the tongue plate is provided with a support leg. Side sliders are provided on both sides of the tongue plate assembly. When the tongue plate assembly extends, the side slider of the tongue plate assembly slides forward and downward along the table slide rail until the rear end of the tongue plate assembly contacts the lower end of the table panel; then, when the support leg is attached to the truck and bears the load, the tongue plate assembly is flipped by the upward torque of the support leg until the tongue plate reinforcing rib contacts the rear crossbeam and bears the load.

2. The anti-jamming telescopic platform according to claim 1, characterized in that: The tabletop assembly also includes a front crossbeam, and when the tongue assembly is extended, the lower end of the tongue reinforcement rib slides in contact with the upper end face of the front crossbeam. And / or, the upper end face of the front crossbeam is provided with several tongue plate sliding blocks that correspond to the lower end of the tongue plate reinforcing rib.

3. The anti-jamming telescopic platform according to claim 2, characterized in that: The front crossbeam and the rear crossbeam are connected by several crossbeam reinforcing bars; And / or, the front crossbeam is made of channel steel or angle steel; And / or, the rear crossbeam is made of square tubing.

4. The anti-jamming telescopic platform according to claim 1, characterized in that: In the tongue plate assembly, the tongue plate is formed by connecting a thick plate at the front and a thin plate at the rear; And / or, a tongue plate pad is provided at the joint between the thick plate and the thin plate to keep it flat; And / or, the thickness of the plate is 14-16mm; And / or, the thickness of the sheet is 6-8mm.

5. The anti-jamming telescopic platform according to claim 1, characterized in that: In the countertop assembly, the two sides of the countertop panel are respectively connected to the upper end of the countertop side panel, and the countertop slide rail is fixed to the inner wall of the countertop side panel. And / or, the tabletop slide rails are made of square tubing; And / or, the lower end face of the rear part of the tabletop is provided with several tabletop reinforcing ribs arranged longitudinally; And / or, the two ends of the back panel of the countertop are connected to the side panels of the countertop, and the front end of the back panel of the countertop is connected to the rear end of the countertop reinforcing rib.

6. The anti-jamming telescopic platform according to any one of claims 1-5, characterized in that: In the tongue plate assembly, the side slider has an L-shaped cross-section, with the lower end face of one side contacting the upper end face of the table slide rail, and the other side connected to the tongue plate assembly. And / or, the upper end face of the rear end of the tongue plate reinforcing rib is provided with a tongue plate tail slider for contacting the lower end face of the table panel; And / or, the rear sides of the tongue plate assembly are also provided with tongue plate rear sliders for contacting the inner wall of the table slide rail; And / or, the side slider, the lower slider of the tongue plate, the tail slider of the tongue plate, and the rear side slider of the tongue plate are made of engineering plastic.

7. The anti-jamming telescopic platform according to any one of claims 1-5, characterized in that: The bottom frame assembly is equipped with an oil pump and an oil cylinder; the oil cylinder is driven by the oil pump and is rotatably connected to the bottom frame assembly through rotating shaft I, and the output rod end of the oil cylinder is rotatably connected to the tongue plate assembly through rotating shaft II.

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