Multi-stage telescopic loading platform

Abstract

The invention relates to the technical field of truck loading platforms, in particular to a multi-stage telescopic truck loading platform which comprises a multi-stage overhanging assembly, the multi-stage overhanging assembly comprises at least three stages of overhanging arms telescopic in the horizontal direction and a first driving mechanism, every two adjacent overhanging arms are arranged in a sliding mode, and every two adjacent overhanging arms are in transmission connection. The first driving mechanism is used for driving the multiple stages of overhanging arms to synchronously stretch out or retract and make contact with one another all the time when the overhanging arms are located in a truck loading area, and a bearing platform used for bearing goods is arranged on the last stage of overhanging arm. During use, the overhanging arms of the multiple stages of overhanging assemblies are driven by the first driving mechanism to stretch out or retract in the horizontal direction; the loading platform on the last stage of overhanging arm is conveyed to the needed position in the compartment in a long distance, the loading platform is completely suitable for being used in an ultra-long compartment and is also suitable for a compartment with a common length, the applicability is greatly improved, the loading platform can be used in compartments with different lengths, and the loading efficiency of bulk cargoes is also improved.

Description

Technical Field

[0001] This invention relates to the field of loading platform technology, and in particular to a multi-stage telescopic loading platform. Background Technology

[0002] In bulk cargo loading operations, the common operating procedure is as follows: goods are first initially gathered and stacked on the loading platform, and then transferred to the inside of the truck for final stacking. In order to maximize the cargo loading capacity of a single transport (i.e., improve volume utilization), some cargo containers are designed to be significantly longer, often exceeding the standard specifications.

[0003] However, the currently widely used semi-extended loading platforms have inherent limitations: their extendable sections typically only extend into the cargo compartment by about 50% of their length (i.e., about one section deep). This design leads to a critical problem: for extra-long cargo boxes or goods that need to extend into the rear half of the cargo compartment, the platform cannot directly deliver them to the target stacking location.

[0004] The direct consequence is that goods located in the rear half of the carriage (i.e., the area not covered by the platform) cannot be efficiently transferred from the platform to the target stacking point in the carriage in one go. After these goods are unloaded at the front of the platform, they must be manually handled or relocated using specialized internal transfer equipment (such as small belt conveyors, hydraulic pallet trucks, etc.) before they can be finally stacked inside the carriage.

[0005] This mandatory secondary transshipment process has brought significant negative impacts: Reduced loading and unloading efficiency: The additional handling steps significantly extend the overall loading time of a single vehicle and reduce the throughput efficiency of the loading and unloading process; Increased labor intensity: Manual handling or operation of auxiliary equipment for secondary stacking inside the carriage greatly increases the physical exertion and workload of on-site operators; Increased overall operating costs: Reduced efficiency means less loading per unit of work hour, requiring more manpower or longer operating hours; increased labor intensity may be accompanied by higher risks of workplace injuries or higher labor costs; at the same time, the introduction or maintenance of specialized equipment also increases equipment investment and operating costs. These factors collectively drive up overall logistics loading and unloading costs. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: in order to solve the problem that the existing loading platforms used for loading bulk cargo can only extend into one section of the truck bed, leaving space inside the truck bed, which generally requires manual or special equipment to assist in handling and stacking, increasing intermediate transfer steps, reducing work efficiency, increasing labor intensity, and indirectly increasing the cost of use, the present invention provides a multi-stage telescopic loading platform.

[0007] The technical solution adopted by this invention to solve its technical problem is: a multi-stage telescopic loading platform, including a multi-stage cantilever assembly. The multi-stage cantilever assembly includes at least three horizontally telescopic cantilever arms and a first drive mechanism. Adjacent cantilever arms are slidably arranged relative to each other in the horizontal direction and are connected to each other through transmission. The first drive mechanism drives the multi-stage cantilever arms to extend or retract synchronously and remain in contact with each other within the truck loading area. The last stage of the cantilever arm is equipped with a carrying platform for carrying goods. Compared to existing technologies, this solution uses the first drive mechanism to drive the cantilever arms of the multi-stage cantilever assembly to achieve synchronous horizontal extension or retraction. The cantilever arm extending into the truck loading area can contact and support the bottom of the truck loading area, allowing the carrying platform on the last stage of the cantilever arm to be transported over long distances to the required position within the truck bed. This fully adapts to the use of extra-long truck beds and is also suitable for ordinary length truck beds, greatly improving its applicability and meeting the needs of truck beds of different lengths. This improves the applicability of the loading platform, thereby increasing the loading efficiency of bulk cargo and reducing loading costs.

[0008] To achieve synchronous extension or retraction of multiple cantilever arms, in some preferred embodiments, a sprocket and chain mechanism is provided on the upper-level cantilever arm of two adjacent cantilever arms. A first anchor point is fixed between the chain in the sprocket and chain mechanism of the upper-level cantilever arm and the chain in the lower-level cantilever arm. A second anchor point is fixed between the chain in the sprocket and chain mechanism of the upper-level and lower-level cantilever arms. The first anchor point is positioned above the second anchor point and staggered. A first drive mechanism is fixedly connected to the first-level cantilever arm and is driven by the sprocket and chain mechanism. By providing a sprocket and chain mechanism on the upper-level cantilever arm, and cooperating with the fixed first and second anchor points, the chain on the upper-level cantilever arm drives the movement of the lower-level cantilever arm. Based on this principle, synchronous extension or retraction of multiple cantilever arms is achieved.

[0009] To ensure stable and reliable extension of the cantilever arms, in some preferred embodiments, support wheels for rolling support are provided at the bottom of each adjacent cantilever arm located at the bottom of the next-level cantilever arm. By providing rolling support wheels at the bottom of the cantilever arms, stable and reliable extension of the multi-stage cantilever arms is achieved.

[0010] To enable sliding between adjacent cantilever arms, in some preferred embodiments, a slider is mounted on one of the adjacent cantilever arms, and a linear guide rail is mounted on the other. The slider matches the linear guide rail and is slidably mounted on the linear guide rail. By using the linear guide rail and slider in cooperation between adjacent cantilever arms, sliding between adjacent cantilever arms is achieved.

[0011] Because the cargo box and loading platform may not align when the truck is parked, some preferred embodiments include a traveling mechanism on the first-stage cantilever arm for controlling the lateral displacement of the multi-stage cantilever components. By incorporating this lateral displacement traveling mechanism on the first-stage cantilever arm, the lateral displacement of the loading platform and its alignment with the cargo box are better controlled.

[0012] Since the height of the cargo box of different trucks is not the same, in order to meet the use of cargo boxes of different heights, in some preferred embodiments, the traveling mechanism is provided with a lifting mechanism for controlling the lifting and lowering of the multi-stage suspension components. The lifting mechanism includes a worm gear lifting mechanism mounted on the traveling mechanism. The lifting end of the worm gear lifting mechanism is fixed to the first-stage cantilever arm, and the power input end of the worm gear lifting mechanism is connected to the second drive mechanism. By installing a lifting mechanism on the traveling mechanism, the lifting mechanism can control the raising or lowering of the first-stage cantilever arm to meet the needs of cargo boxes of different heights, thus improving the applicability of the loading platform.

[0013] To prevent excessive lateral displacement of the traveling mechanism, some preferred embodiments further include a ground rail unit, on which the traveling mechanism is mounted, and the ground rail unit is used to limit the lateral displacement range of the multi-stage cantilever assembly.

[0014] In some preferred embodiments, the walking mechanism includes at least two sets of roller groups spaced apart from each other on the first-stage cantilever arm. Each set of roller groups includes rollers arranged opposite to each other on both sides of the first-stage cantilever arm. The first-stage cantilever arm is provided with a third drive mechanism for driving the rollers to rotate.

[0015] In some preferred embodiments, the ground rail unit includes a horizontally arranged flat steel rail, and the outer circumferential surface of the roller is provided with an annular groove that matches the flat steel rail. The annular groove of the roller in each set of rollers is provided on the flat steel rail.

[0016] To prevent accidental operation that could cause the traveling mechanism to collide with the loading platform or multi-stage cantilever assembly and the cargo box during loading, in some preferred embodiments, the ground rail unit further includes a ground mat. The flat steel rail is fixedly installed on the ground mat, and both ends of the flat steel rail are provided with limiting blocks to restrict the position of the rollers. By providing limiting blocks at both ends of the flat steel rail to restrict the traveling mechanism to the flat steel rail, collisions between the loading platform or multi-stage cantilever assembly and the cargo box due to accidental operation are effectively prevented.

[0017] The beneficial effects of this invention are as follows: When in use, the multi-stage telescopic loading platform of this invention drives the cantilever arms of the multi-stage cantilever assembly to extend or retract horizontally through the first drive mechanism. The cantilever arm extending into the loading area of ​​the truck can contact and support the bottom of the loading area, thus transporting the carrying platform on the last stage cantilever arm over a long distance to the required position in the truck bed. It is fully adaptable to the use of extra-long truck beds, and is also suitable for truck beds of ordinary length. Its applicability is greatly improved, meeting the needs of truck beds of different lengths, thereby improving the loading efficiency of bulk cargo, reducing loading costs, and avoiding the problem that existing loading platforms used for bulk cargo loading can only extend into one section of the truck bed, leaving space inside the truck bed that generally requires manual labor or special equipment for handling and stacking, increasing intermediate transfer steps, reducing work efficiency, increasing labor intensity, and indirectly increasing usage costs. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 yes Figure 1 A magnified view of part A in the image; Figure 3 yes Figure 1 A magnified view of part B in the image; Figure 4 This is the front view of the present invention; Figure 5 This is the left view of the present invention; Figure 6 This is the right view of the present invention; Figure 7 This is a top view of the present invention; Figure 8 This is a bottom view of the present invention; Figure 9 yes Figure 5 A magnified view of part C; Figure 10 This is a diagram showing the state of the invention when it is extended; Figure 11 yes Figure 10 A magnified view of part D; Figure 12 yes Figure 10 Enlarged view of part E Figure 13 yes Figure 10 Enlarged view of part F Figure 14 yes Figure 10 A magnified view of a portion of G.

[0020] In the diagram: 1. Multi-stage cantilever assembly; 101. Cantilever arm; 1011. First-stage cantilever arm; 1012. Second-stage cantilever arm; 1013. Third-stage cantilever arm; 1014. Fourth-stage cantilever arm; 102. First drive mechanism; 103. Sprocket and chain mechanism; 104. First anchor point; 105. Second anchor point; 106. Support wheel. 2. Supporting platform; 3. Walking mechanism; 4. Lifting mechanism; 5. Ground rail unit, 501. Flat steel rail, 502. Ground mat, 503. Limiting block. Detailed Implementation

[0021] like Figure 1-14 As shown, a multi-stage telescopic loading platform includes a multi-stage cantilever assembly 1, a traveling mechanism 3, and a ground rail unit 5. The multi-stage cantilever assembly 1 includes four horizontally telescopic cantilever arms 101 and a first drive mechanism 102. Adjacent cantilever arms 101 are slidably arranged relative to each other in the horizontal direction and are connected to each other through transmission. The first drive mechanism 102 is used to drive the multi-stage cantilever arms 101 to extend or retract synchronously. The multi-stage cantilever arms 101 in the truck loading area are always supported on the bottom of the truck. The last stage cantilever arm 101 is provided with a carrying platform 2 for carrying goods. Here, the last stage is the fourth stage cantilever arm 1014. The traveling mechanism 3 is located at the bottom of the first stage cantilever arm 1011. The traveling mechanism 3 is used to control the lateral displacement of the multi-stage cantilever assembly 1. The traveling mechanism 3 is located on the ground rail unit 5, which is used to limit the lateral displacement range of the multi-stage cantilever assembly 1.

[0022] Two adjacent cantilever arms 101 are provided with a sprocket and chain mechanism 103 on the upper cantilever arm 101. A first anchor point 104, mutually fixed, is provided between the chain in the sprocket and chain mechanism 103 on the upper cantilever arm 101 and the chain in the sprocket and chain mechanism 103 on the lower cantilever arm 101. A second anchor point 104, mutually fixed, is provided between the chain in the sprocket and chain mechanism 103 on the upper and lower cantilever arms 101. Anchor point 105, first anchor point 104 is set above second anchor point 105 and they are staggered. In this embodiment, first anchor point 104 is located at the rear end of the next-level cantilever arm 101, and second anchor point 105 is located at the front end of the previous-level cantilever arm 101. First drive mechanism 102 is fixedly connected to the first-level cantilever arm 1011 and is driven by sprocket and chain mechanism 103. Each adjacent cantilever arm 101 is provided with support wheel 106 for rolling support of the cantilever arm 101 at the bottom of the next-level cantilever arm 101. The main function of first anchor point 104 is to drive the next-level cantilever arm 101 to extend and retract on the previous-level cantilever arm 101, while the main function of second anchor point 105 is to fix the chain on the sprocket and chain mechanism 103 of the next-level cantilever arm 101 to the previous-level cantilever arm 101, so as to realize the extension of the next-level cantilever arm 101 relative to the previous-level cantilever arm 101. In the retracted state, since the chain of the next-level cantilever arm 101 is fixed to the previous-level cantilever arm 101, the chain at the second anchor point 105 is relatively stationary with respect to the previous-level cantilever arm 101. This allows the chain of the next-level cantilever arm 101 to move relative to the previous-level cantilever arm 101. Therefore, according to this principle, the first-level cantilever arm 1011, the second-level cantilever arm 1012, the third-level cantilever arm 1013, and the fourth-level cantilever arm 1014 can be extended or retracted synchronously.

[0023] A slider is installed on one of the two adjacent cantilever arms 101, and a linear guide is installed on the other of the two adjacent cantilever arms 101. The slider matches the linear guide and is slidably set on the linear guide, so that the two adjacent cantilever arms 101 can slide relative to each other in the horizontal direction.

[0024] The traveling mechanism 3 is equipped with a lifting mechanism 4 for controlling the lifting and lowering of the multi-stage cantilever assembly 1. The lifting mechanism 4 includes a worm gear lifting mechanism 4 installed on the traveling mechanism 3. The lifting end of the worm gear lifting mechanism 4 is fixed on the first stage cantilever arm 1011, and the power input end of the worm gear lifting mechanism 4 is connected to the second drive mechanism.

[0025] The traveling mechanism 3 includes two sets of rollers spaced apart on the first-stage cantilever arm 1011. Each set of rollers includes rollers arranged opposite to each other on both sides of the first-stage cantilever arm 1011. The first-stage cantilever arm 1011 is provided with a third drive mechanism for driving the rollers to rotate.

[0026] The ground rail unit 5 includes a horizontally arranged flat steel rail 501. The outer circumferential surface of the roller is provided with an annular groove that matches the flat steel rail 501. The annular groove of the roller in each set of rollers is provided on the flat steel rail 501. The ground rail unit 5 also includes a ground mat 502. The flat steel rail 501 is fixedly installed on the ground mat 502. The two ends of the flat steel rail 501 are provided with limiting blocks 503 for limiting the position of the roller.

[0027] In this embodiment, a four-stage horizontally extending cantilever arm 101 is taken as an example. Of course, in addition to four stages, there can also be three stages, five stages, or more stages. Meanwhile, the first drive mechanism 102 includes a first motor and a first reducer. The first reducer is fixedly installed on the first stage cantilever arm 1011. The power end of the first motor is driven by the power input end of the first reducer. Also, taking two sets of spaced walking mechanisms 3 as an example, in addition to two sets of walking mechanisms 3, there can also be three stages, four stages, or more stages. The second drive mechanism is a second motor. The output end of the second motor is driven by the power input end of the worm gear lifting mechanism 4. The third drive mechanism is a third motor. The roller is driven by the output end of the third motor. The horizontal direction is the X-axis direction, the lateral direction is the Y-axis direction, and the lifting direction is the Z-axis direction. The support wheel 106 supports the corresponding extended second stage cantilever arm 1012, third stage cantilever arm 1013, and fourth stage cantilever arm 1014.

[0028] Meanwhile, a protruding step is provided on one of the two adjacent cantilever arms 101. The step is set along the extension direction of the cantilever arm 101. A wheel is provided on the other cantilever arm 101. The wheel is located at the tail end of the cantilever arm 101 and rolls on the step. The wheel is located above the step. This is mainly to reduce the bending deformation of the cantilever arm 101 when the multi-stage cantilever assembly 1 is extended, so as to affect the stable transportation of goods.

[0029] The principle of this invention is as follows: Before loading, the loading platform and the cargo box must be adjusted. The third motor on the third drive mechanism of the walking mechanism 3 drives the roller to rotate. The roller is on the flat steel rail 501 of the ground rail unit 5, which drives the loading platform to move laterally along the Y-axis. The loading platform and the cargo box are aligned laterally. Then, the lifting mechanism 4 is controlled to start the second motor and drive the lifting mechanism 4 to rise and fall. The multi-stage suspension assembly 1 is controlled to rise or fall as a whole, and the multi-stage suspension assembly 1 is adjusted to the required height of the cargo box, thus completing the preliminary loading adjustment work. When loading goods, the goods are placed on the carrying platform 2. The first motor at the first drive mechanism 102 reduces speed and increases torque through the first reducer, driving the sprocket and chain mechanism 103 on the first-stage cantilever arm 1011 to rotate. The sprocket and chain mechanism 103 on the first-stage cantilever arm 1011 drives the second-stage cantilever arm 1012 to extend from the first-stage cantilever arm 1011. At the same time, the third-stage cantilever arm 1013 extends from the second-stage cantilever arm 1012, and the fourth-stage cantilever arm 1014 extends from the third-stage cantilever arm 1013, thus realizing the extension of the second-stage cantilever arm 1012, the third-stage cantilever arm 1013, and the fourth-stage cantilever arm 1014. The arms extend synchronously until the carrying platform 2 on the fourth-stage cantilever arm 1014 is transported to the required position in the cargo box. At the same time, the support wheels 106 on the extended second-stage cantilever arm 1012, third-stage cantilever arm 1013, and fourth-stage cantilever arm 1014 roll inside the cargo box. Then, the bulk cargo can be loaded onto the vehicle. By gradually driving the multi-stage cantilever assembly 1 to extend or retract synchronously through the first drive mechanism 102, the goods can be loaded into the required position inside the cargo box, which meets the needs of extra-long cargo boxes, improves the applicability of the loading platform, and eliminates the need to transfer the cargo to the required position by manpower or other equipment, thereby reducing labor intensity and loading costs.

Claims

1. A multi-stage telescopic loading platform, characterized in that: The system includes a multi-stage cantilever assembly (1), which includes at least three stages of horizontally extending and retracting cantilever arms (101) and a first drive mechanism (102). Adjacent cantilever arms (101) are slidably arranged relative to each other in the horizontal direction and are connected to each other through transmission. The first drive mechanism (102) is used to drive the multi-stage cantilever arms (101) to extend or retract synchronously and always be in contact with each other when in the loading area of ​​the truck. The last stage cantilever arm (101) is provided with a carrying platform (2) for carrying goods.

2. The multi-stage telescopic loading platform according to claim 1, characterized in that: Two adjacent cantilever arms (101) are provided with a sprocket and chain mechanism (103) on the upper-level cantilever arm (101). The chains in the sprocket and chain mechanism (103) on the upper-level cantilever arm (101) and the chains in the sprocket and chain mechanism (103) on the lower-level cantilever arm (101) are provided with a first anchor point (104) that is fixed to each other. The chains in the sprocket and chain mechanism (103) on the upper-level cantilever arm (101) and the chains in the sprocket and chain mechanism (103) on the lower-level cantilever arm (101) are provided with a second anchor point (105) that is fixed to each other. The first anchor point (104) is located above the second anchor point (105) and is staggered. The first drive mechanism (102) is fixedly connected to the first-level cantilever arm (1011) and is connected to the sprocket and chain mechanism (103) for transmission.

3. The multi-stage telescopic loading platform according to claim 1, characterized in that: Each of the two adjacent cantilever arms (101) is provided with a support wheel (106) for rolling support of the cantilever arm (101) at the bottom of the next level cantilever arm (101).

4. The multi-stage telescopic loading platform according to claim 1, characterized in that: A slider is installed on one of the two adjacent cantilever arms (101), and a linear guide is installed on the other of the two adjacent cantilever arms (101). The slider is matched with the linear guide and is slidably disposed on the linear guide.

5. The multi-stage telescopic loading platform according to claim 1, characterized in that: The first-stage cantilever arm (1011) is provided with a traveling mechanism (3) for controlling the lateral displacement of the multi-stage cantilever assembly (1).

6. The multi-stage telescopic loading platform according to claim 5, characterized in that: The walking mechanism (3) is provided with a lifting mechanism (4) for controlling the lifting of the multi-stage suspension assembly (1). The lifting mechanism (4) includes a worm gear lifting mechanism (4) mounted on the walking mechanism (3). The lifting end of the worm gear lifting mechanism (4) is fixed on the first stage cantilever arm (1011). The power input end of the worm gear lifting mechanism (4) is connected to the second drive mechanism.

7. The multi-stage telescopic loading platform according to claim 5 or 6, characterized in that: It also includes a ground rail unit (5), on which the walking mechanism (3) is mounted, and the ground rail unit (5) is used to limit the lateral displacement range of the multi-stage cantilever assembly (1).

8. The multi-stage telescopic loading platform according to claim 7, characterized in that: The walking mechanism (3) includes at least two sets of rollers spaced apart on the first-stage cantilever arm (1011). Each set of rollers includes rollers arranged opposite to each other on both sides of the first-stage cantilever arm (1011). The first-stage cantilever arm (1011) is provided with a third drive mechanism for driving the rollers to rotate.

9. The multi-stage telescopic loading platform according to claim 8, characterized in that: The ground rail unit (5) includes a horizontally arranged flat steel rail (501), and the outer circumferential surface of the roller is provided with an annular groove that matches the flat steel rail (501). The annular groove of the roller in each set of rollers is provided on the flat steel rail (501).

10. The multi-stage telescopic loading platform according to claim 9, characterized in that: The ground rail unit (5) also includes a ground mat (502), and the flat steel rail (501) is fixedly installed above the ground mat (502). The two ends of the flat steel rail (501) are provided with limiting blocks (503) for limiting the position of the roller.

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